//copyright 'Spike', license gplv2+
//provides both a package manager and downloads menu.
//FIXME: block downloads of exe/dll/so/etc if not an https url (even if inside zips). also block such files from package lists over http.

//Note: for a while we didn't have strong hashes, nor signing, so we depended upon known-self-signed tls certificates to prove authenticity
//we now have sha256 hashes(and sizes) to ensure that the file we wanted hasn't been changed in transit.
//and we have signature info, to prove that the hash specified was released by a known authority. This means that we should now be able to download such things over http without worries (or at least that we can use an untrustworthy CA that's trusted by insecurity-mafia browsers).
//WARNING: paks/pk3s may still be installed without signatures, without allowing dlls/exes/etc to be installed.
//signaturedata+hashes can be generated with 'fteqw -privkey key.priv -pubkey key.pub -certhost MyAuthority -sign pathtofile', but Auth_GetKnownCertificate will need to be updated for any allowed authorities.

#include "quakedef.h"
#include "shader.h"
#include "netinc.h"

#define ENABLEPLUGINSBYDEFAULT	//auto-enable plugins that the user installs. this risks other programs installing dlls (but we can't really protect our listing file so this is probably not any worse in practise).

#ifdef PACKAGEMANAGER
	#if !defined(NOBUILTINMENUS) && !defined(SERVERONLY)
		#define DOWNLOADMENU
	#endif
#endif

#ifdef PACKAGEMANAGER
#include "fs.h"

//some extra args for the downloads menu (for the downloads menu to handle engine updates).
#if defined(_DEBUG) || defined(DEBUG)
#define PHPDBG "&dbg=1"
#else
#define PHPDBG
#endif
#ifndef SVNREVISION
#define SVNREVISION -
#endif
static char enginerevision[256] = STRINGIFY(SVNREVISION);
#define DOWNLOADABLESARGS PHPDBG



#ifdef ENABLEPLUGINSBYDEFAULT
cvar_t	pkg_autoupdate = CVARFD("pkg_autoupdate", "1", CVAR_NOTFROMSERVER|CVAR_NOSAVE|CVAR_NOSET, "Controls autoupdates, can only be changed via the downloads menu.\n0: off.\n1: enabled (stable only).\n2: enabled (unstable).\nNote that autoupdate will still prompt the user to actually apply the changes."); //read from the package list only.
#else
cvar_t	pkg_autoupdate = CVARFD("pkg_autoupdate", "-1", CVAR_NOTFROMSERVER|CVAR_NOSAVE|CVAR_NOSET, "Controls autoupdates, can only be changed via the downloads menu.\n0: off.\n1: enabled (stable only).\n2: enabled (unstable).\nNote that autoupdate will still prompt the user to actually apply the changes."); //read from the package list only.
#endif

#define INSTALLEDFILES	"installed.lst"	//the file that resides in the quakedir (saying what's installed).

//installed native okay [previously manually installed, or has no a qhash]
//installed cached okay [had a qhash]
//installed native corrupt [they overwrote it manually]
//installed cached corrupt [we fucked up, probably]
//installed native missing (becomes not installed) [deleted]
//installed cached missing (becomes not installed) [deleted]
//installed none [meta package with no files]

//!installed native okay [was manually installed, flag as installed now]
//!installed cached okay [they got it from some other source / previously installed]
//!installed native corrupt [manually installed conflict]
//!installed cached corrupt [we fucked up, probably]

//!installed * missing [simply not installed]

#define DPF_ENABLED					(1u<<0)
#define DPF_NATIVE					(1u<<1)	//appears to be installed properly
#define DPF_CACHED					(1u<<2)	//appears to be installed in their dlcache dir (and has a qhash)
#define DPF_CORRUPT					(1u<<3)	//will be deleted before it can be changed

#define DPF_USERMARKED				(1u<<4)	//user selected it
#define DPF_AUTOMARKED				(1u<<5)	//selected only to satisfy a dependancy
#define DPF_MANIMARKED				(1u<<6)	//legacy. selected to satisfy packages listed directly in manifests. the filesystem code will load the packages itself, we just need to download (but not enable).
#define DPF_DISPLAYVERSION			(1u<<7)	//some sort of conflict, the package is listed twice, so show versions so the user knows what's old.

#define DPF_FORGETONUNINSTALL		(1u<<8)	//for previously installed packages, remove them from the list if there's no current version any more (should really be automatic if there's no known mirrors)
#define DPF_HIDDEN					(1u<<9)	//wrong arch, file conflicts, etc. still listed if actually installed.
#define DPF_PURGE					(1u<<10)	//package should be completely removed (ie: the dlcache dir too). if its still marked then it should be reinstalled anew. available on cached or corrupt packages, implied by native.
#define DPF_MANIFEST				(1u<<11)	//package was named by the manifest, and should only be uninstalled after a warning.

#define DPF_TESTING					(1u<<12)	//package is provided on a testing/trial basis, and will only be selected/listed if autoupdates are configured to allow it.
#define DPF_GUESSED					(1u<<13)	//package data was guessed from basically just filename+qhash+url. merge aggressively.
#define DPF_ENGINE					(1u<<14)	//engine update. replaces old autoupdate mechanism
#define DPF_PLUGIN					(1u<<15)	//this is a plugin package, with a dll

//#define DPF_TRUSTED					(1u<<16)	//flag used when parsing package lists. if not set then packages will be ignored if they are anything but paks/pk3s
#define DPF_SIGNATUREREJECTED		(1u<<17)	//signature is bad
#define DPF_SIGNATUREACCEPTED		(1u<<18)	//signature is good (required for dll/so/exe files)
#define DPF_SIGNATUREUNKNOWN		(1u<<19)	//signature is unknown

#define DPF_MARKED					(DPF_USERMARKED|DPF_AUTOMARKED)	//flags that will enable it
#define DPF_ALLMARKED				(DPF_USERMARKED|DPF_AUTOMARKED|DPF_MANIMARKED)	//flags that will download it without necessarily enabling it.
#define DPF_PRESENT					(DPF_NATIVE|DPF_CACHED)
#define DPF_DISABLEDINSTALLED		(DPF_ENGINE|DPF_PLUGIN)	//engines+plugins can be installed without being enabled.
//pak.lst
//priories <0
//pakX
//manifest packages
//priority 0-999
//*.pak
//priority >=1000
#define PM_DEFAULTPRIORITY		1000

void CL_StartCinematicOrMenu(void);

#if defined(SERVERONLY)
#	define ENGINE_RENDERER "sv"
#elif defined(GLQUAKE) && (defined(VKQUAKE) || defined(D3DQUAKE) || defined(SWQUAKE))
#	define ENGINE_RENDERER "m"
#elif defined(GLQUAKE)
#	define ENGINE_RENDERER "gl"
#elif defined(VKQUAKE)
#	define ENGINE_RENDERER "vk"
#elif defined(D3DQUAKE)
#	define ENGINE_RENDERER "d3d"
#else
#	define ENGINE_RENDERER "none"
#endif
#if defined(NOCOMPAT)
#	define ENGINE_CLIENT "-nc"
#elif defined(MINIMAL)
#	define ENGINE_CLIENT "-min"
#elif defined(CLIENTONLY)
#	define ENGINE_CLIENT "-cl"
#else
#	define ENGINE_CLIENT
#endif

#define THISARCH PLATFORM "_" ARCH_CPU_POSTFIX
#define THISENGINE THISARCH "-" DISTRIBUTION "-" ENGINE_RENDERER ENGINE_CLIENT

#define MAXMIRRORS 8
typedef struct package_s {
	char *name;
	char *category;	//in path form

	struct package_s *alternative;	//alternative (hidden) forms of this package.

	char *mirror[MAXMIRRORS];	//FIXME: move to two types of dep...
	char gamedir[16];
	enum fs_relative fsroot;
	char version[16];
	char *arch;
	char *qhash;

	quint64_t filesize;	//in bytes, as part of verifying the hash.
	char *filesha1;
	char *filesha512;
	char *signature;

	char *title;
	char *description;
	char *license;
	char *author;
	char *website;
	char *previewimage;
	enum
	{
		EXTRACT_COPY,	//just copy the download over
		EXTRACT_XZ,		//give the download code a write filter so that it automatically decompresses on the fly
		EXTRACT_GZ,		//give the download code a write filter so that it automatically decompresses on the fly
		EXTRACT_EXPLICITZIP,//extract an explicit file list once it completes. kinda sucky.
		EXTRACT_ZIP,	//extract stuff once it completes. kinda sucky.
	} extract;

	struct packagedep_s
	{
		struct packagedep_s *next;
		enum
		{
			DEP_CONFLICT,		//don't install if we have the named package installed.
			DEP_REPLACE,		//obsoletes the specified package (or just acts as a conflict marker for now).
			DEP_FILECONFLICT,	//don't install if this file already exists.
			DEP_REQUIRE,		//don't install unless we have the named package installed.
			DEP_RECOMMEND,		//like depend, but uninstalling will not bubble.
			DEP_SUGGEST,		//like recommend, but will not force install (ie: only prevents auto-uninstall)
			DEP_NEEDFEATURE,	//requires a specific feature to be available (typically controlled via a cvar)
//			DEP_MIRROR,
//			DEP_FAILEDMIRROR,

			DEP_SOURCE,			//which source url we found this package from
			DEP_EXTRACTNAME,	//a file that will be installed
			DEP_FILE			//a file that will be installed
		} dtype;
		char name[1];
	} *deps;

#ifdef WEBCLIENT
	struct dl_download *download;
	unsigned int trymirrors;
#endif

	int flags;
	int priority;
	struct package_s **link;
	struct package_s *next;
} package_t;

static qboolean loadedinstalled;
static package_t *availablepackages;
static int numpackages;
static char *manifestpackages;	//metapackage named by the manicfest.
static char *declinedpackages;	//metapackage named by the manicfest.
static int domanifestinstall;	//SECURITY_MANIFEST_*

#ifndef SERVERONLY
//static qboolean pluginpromptshown;	//so we only show prompts for new externally-installed plugins once, instead of every time the file is reloaded.
#endif

#ifdef WEBCLIENT
static int allowphonehome = -1;	//if autoupdates are disabled, make sure we get (temporary) permission before phoning home for available updates. (-1=unknown, 0=no, 1=yes)
static qboolean doautoupdate;	//updates will be marked (but not applied without the user's actions)
static qboolean pkg_updating;	//when flagged, further changes are blocked until completion.
#else
static const qboolean pkg_updating = false;
#endif
static qboolean pm_packagesinstalled;

//FIXME: these are allocated for the life of the exe. changing basedir should purge the list.
static size_t pm_numsources = 0;
static struct
{
	char *url;					//url to query. unique.
	char *prefix;				//category prefix for packages from this source.
	enum
	{
		SRCSTAT_UNTRIED,		//not tried to connect at all.
		SRCSTAT_FAILED_DNS,		//tried but failed, unresolvable.
		SRCSTAT_FAILED_NORESP,	//tried but failed, no response.
		SRCSTAT_FAILED_REFUSED,	//tried but failed, refused (no precess).
		SRCSTAT_FAILED_EOF,		//tried but failed, abrupt termination.
		SRCSTAT_FAILED_MITM,	//tried but failed. misc cert problems.
		SRCSTAT_FAILED_HTTP,	//tried but failed, misc http failure.
		SRCSTAT_PENDING,		//waiting for response (or queued). don't show package list yet.
		SRCSTAT_OBTAINED,		//we got a response.
	} status;
	#define SRCFL_HISTORIC	(1u<<0)	//aka hidden. replaced by the others... used for its enablement. must be parsed first so its enabled-state wins.
	#define SRCFL_NESTED	(1u<<1)	//discovered from a different source. always disabled.
	#define SRCFL_MANIFEST	(1u<<2)	//not saved. often default to enabled.
	#define SRCFL_USER		(1u<<3)	//user explicitly added it. included into installed.lst. enabled (if trusted).
	#define SRCFLMASK_FROM	(SRCFL_HISTORIC|SRCFL_NESTED|SRCFL_MANIFEST|SRCFL_USER) //mask of flags, forming priority for replacements.
	#define SRCFL_DISABLED	(1u<<4)	//source was explicitly disabled.
	#define SRCFL_ENABLED	(1u<<5)	//source was explicitly enabled.
	#define SRCFL_PROMPTED	(1u<<6)	//source was explicitly enabled.
	#define SRCFL_ONCE		(1u<<7)	//autoupdates are disabled, but the user is viewing packages anyway. enabled via a prompt.
	unsigned int flags;
	struct dl_download *curdl;	//the download context
} *pm_source/*[pm_maxsources]*/;
static int downloadablessequence;	//bumped any time any package is purged

static void PM_WriteInstalledPackages(void);
static void PM_PreparePackageList(void);
#ifdef WEBCLIENT
static qboolean PM_SignatureOkay(package_t *p);
#endif

static void PM_FreePackage(package_t *p)
{
	struct packagedep_s *d;
#ifdef WEBCLIENT
	int i;
#endif

	if (p->link)
	{
		if (p->alternative)
		{	//replace it with its alternative package
			*p->link = p->alternative;
			p->alternative->alternative = p->alternative->next;
			if (p->alternative->alternative)
				p->alternative->alternative->link = &p->alternative->alternative;
			p->alternative->next = p->next;
			p->alternative->link = p->link;
		}
		else
		{	//just remove it from the list.
			*p->link = p->next;
			if (p->next)
				p->next->link = p->link;
		}
	}

#ifdef WEBCLIENT
	if (p->download)
	{	//if its currently downloading, cancel it.
		DL_Close(p->download);
		p->download = NULL;
	}

	for (i = 0; i < countof(p->mirror); i++)
		Z_Free(p->mirror[i]);
#endif

	//free its data.
	while(p->deps)
	{
		d = p->deps;
		p->deps = d->next;
		Z_Free(d);
	}

	Z_Free(p->name);
	Z_Free(p->category);
	Z_Free(p->title);
	Z_Free(p->description);
	Z_Free(p->author);
	Z_Free(p->website);
	Z_Free(p->license);
	Z_Free(p->previewimage);
	Z_Free(p->qhash);
	Z_Free(p->arch);
	Z_Free(p);
}

static void PM_AddDep(package_t *p, int deptype, const char *depname)
{
	struct packagedep_s *nd, **link;

	//no dupes.
	for (link = &p->deps; (nd=*link) ; link = &nd->next)
	{
		if (nd->dtype == deptype && !strcmp(nd->name, depname))
			return;
	}

	//add it on the end, preserving order.
	nd = Z_Malloc(sizeof(*nd) + strlen(depname));
	nd->dtype = deptype;
	strcpy(nd->name, depname);
	nd->next = *link;
	*link = nd;
}
static qboolean PM_HasDep(package_t *p, int deptype, const char *depname)
{
	struct packagedep_s *d;

	//no dupes.
	for (d = p->deps; d ; d = d->next)
	{
		if (d->dtype == deptype && !strcmp(d->name, depname))
			return true;
	}
	return false;
}

static qboolean PM_PurgeOnDisable(package_t *p)
{
	//corrupt packages must be purged
	if (p->flags & DPF_CORRUPT)
		return true;
	//certain updates can be present and not enabled
	if (p->flags & DPF_DISABLEDINSTALLED)
		return false;
	//hashed packages can also be present and not enabled, but only if they're in the cache and not native
	if (*p->gamedir && (p->flags & DPF_CACHED))
		return false;
	//all other packages must be deleted to disable them
	return true;
}

void PM_ValidateAuthenticity(package_t *p, enum hashvalidation_e validated)
{
	qbyte hashdata[512];
	size_t hashsize = 0;
	qbyte signdata[1024];
	size_t signsize = 0;
	int r;
	char authority[MAX_QPATH], *sig;

#ifndef _DEBUG
#pragma message("Temporary code.")
	//this is temporary code and should be removed once everything else has been fixed.
	//ignore the signature (flag as accepted) for any packages with all mirrors on our own update site.
	//we can get away with this because we enforce a known certificate for the download.
	if (!COM_CheckParm("-notlstrust"))
	{
		conchar_t musite[256], *e;
		char site[256];
		char *oldprefix = "http://fte.";
		char *newprefix = "https://updates.";
		int m;
		e = COM_ParseFunString(CON_WHITEMASK, ENGINEWEBSITE, musite, sizeof(musite), false);
		COM_DeFunString(musite, e, site, sizeof(site)-1, true, true);
		if (!strncmp(site, oldprefix, strlen(oldprefix)))
		{
			memmove(site+strlen(newprefix), site+strlen(oldprefix), strlen(site)-strlen(oldprefix)+1);
			memcpy(site, newprefix, strlen(newprefix));
		}
		Q_strncatz(site, "/", sizeof(site));
		for (m = 0; m < countof(p->mirror); m++)
		{
			if (p->mirror[m] && strncmp(p->mirror[m], site, strlen(site)))
				break;	//some other host
		}
		if (m == countof(p->mirror))
		{
			p->flags |= DPF_SIGNATUREACCEPTED;
			return;
		}
	}
#endif

	*authority = 0;
	if (!p->signature)
		r = VH_AUTHORITY_UNKNOWN;
	else if (!p->filesha512)
		r = VH_INCORRECT;
	else
	{
		sig = strchr(p->signature, ':');
		if (sig && sig-p->signature<countof(authority)-1)
		{
			memcpy(authority, p->signature, sig-p->signature);
			authority[sig-p->signature] = 0;
			sig++;
		}
		else
			sig = p->signature;
		hashsize = Base16_DecodeBlock(p->filesha512, hashdata, sizeof(hashdata));
		signsize = Base64_DecodeBlock(sig, NULL, signdata, sizeof(signdata));
		r = VH_UNSUPPORTED;//preliminary
	}

	(void)signsize;
	(void)hashsize;

	//try and get one of our providers to verify it...
#ifdef HAVE_WINSSPI
	if (r == VH_UNSUPPORTED)
		r = SSPI_VerifyHash(hashdata, hashsize, authority, signdata, signsize);
#endif
#ifdef HAVE_GNUTLS
	if (r == VH_UNSUPPORTED)
		r = GNUTLS_VerifyHash(hashdata, hashsize, authority, signdata, signsize);
#endif
#ifdef HAVE_OPENSSL
	if (r == VH_UNSUPPORTED)
		r = OSSL_VerifyHash(hashdata, hashsize, authority, signdata, signsize);
#endif

	p->flags &= ~(DPF_SIGNATUREACCEPTED|DPF_SIGNATUREREJECTED|DPF_SIGNATUREUNKNOWN);
	if (r == VH_CORRECT)
		p->flags |= DPF_SIGNATUREACCEPTED;
	else if (r == VH_INCORRECT)
		p->flags |= DPF_SIGNATUREREJECTED;
	else if (validated == VH_CORRECT && p->filesize && (p->filesha1||p->filesha512))
		p->flags |= DPF_SIGNATUREACCEPTED;	//parent validation was okay, expand that to individual packages too.
	else if (p->signature)
		p->flags |= DPF_SIGNATUREUNKNOWN;
}

static qboolean PM_TryGenCachedName(const char *pname, package_t *p, char *local, int llen)
{
	if (!*p->gamedir)
		return false;
	if (!p->qhash)
	{	//we'll throw paks+pk3s into the cache dir even without a qhash
		const char *ext = COM_GetFileExtension(pname, NULL);
		if (strcmp(ext, ".pak") && strcmp(ext, ".pk3"))
			return false;
	}
	return FS_GenCachedPakName(pname, p->qhash, local, llen);
}

//checks the status of each package
static void PM_ValidatePackage(package_t *p)
{
	package_t *o;
	struct packagedep_s *dep;
	vfsfile_t *pf;
	char temp[MAX_OSPATH];
	p->flags &=~ (DPF_NATIVE|DPF_CACHED|DPF_CORRUPT);
	if (p->flags & DPF_ENABLED)
	{
		for (dep = p->deps; dep; dep = dep->next)
		{
			char *n;
			if (dep->dtype != DEP_FILE)
				continue;
			if (*p->gamedir)
				n = va("%s/%s", p->gamedir, dep->name);
			else
				n = dep->name;
			pf = FS_OpenVFS(n, "rb", p->fsroot);
			if (pf)
			{
				VFS_CLOSE(pf);
				p->flags |= DPF_NATIVE;
			}
			else if (PM_TryGenCachedName(n, p, temp, sizeof(temp)))
			{
				pf = FS_OpenVFS(temp, "rb", p->fsroot);
				if (pf)
				{
					VFS_CLOSE(pf);
					p->flags |= DPF_CACHED;
				}
			}
			if (!(p->flags & (DPF_NATIVE|DPF_CACHED)))
				Con_Printf("WARNING: %s (%s) no longer exists\n", p->name, n);
		}
	}
	else
	{
		for (dep = p->deps; dep; dep = dep->next)
		{
			char *n;
			struct packagedep_s *odep;
			unsigned int fl = DPF_NATIVE;
			if (dep->dtype != DEP_FILE)
				continue;
			if (*p->gamedir)
				n = va("%s/%s", p->gamedir, dep->name);
			else
				n = dep->name;
			pf = FS_OpenVFS(n, "rb", p->fsroot);
			if (!pf && PM_TryGenCachedName(n, p, temp, sizeof(temp)))
			{
				pf = FS_OpenVFS(temp, "rb", p->fsroot);
				fl = DPF_CACHED;
				//fixme: skip any archive checks
			}

			if (pf)
			{
				for (o = availablepackages; o; o = o->next)
				{
					if (o == p)
						continue;
					if (o->flags & DPF_ENABLED)
					{
						if (!strcmp(p->gamedir, o->gamedir) && p->fsroot == o->fsroot)
							if (strcmp(p->name, o->name) || strcmp(p->version, o->version))
							{
								for (odep = o->deps; odep; odep = odep->next)
								{
									if (!strcmp(dep->name, odep->name))
										break;
								}
								if (odep)
									break;
							}
					}
				}
				if ((o && o->qhash && p->qhash && (o->flags & DPF_CACHED)) || fl == DPF_CACHED)
					p->flags |= DPF_CACHED;
				else if (!o)
				{
					if (!PM_PurgeOnDisable(p) || !strcmp(p->gamedir, "downloads"))
					{
						p->flags |= fl;
						VFS_CLOSE(pf);
					}
					else if (p->qhash)
					{
						searchpathfuncs_t *archive = FS_OpenPackByExtension(pf, NULL, n, n);

						if (archive)
						{
							unsigned int fqhash;
							pf = NULL;
							fqhash = archive->GeneratePureCRC(archive, 0, 0);
							archive->ClosePath(archive);

							if (fqhash == (unsigned int)strtoul(p->qhash, NULL, 0))
							{
								p->flags |= fl;
								if (fl&DPF_NATIVE)
									p->flags |= DPF_MARKED|DPF_ENABLED;
								break;
							}
							else
								pf = NULL;
						}
						else
							VFS_CLOSE(pf);
					}
					else
					{
						p->flags |= DPF_CORRUPT|fl;
						VFS_CLOSE(pf);
					}
					break;
				}
				VFS_CLOSE(pf);
			}
		}
	}
}

static qboolean PM_MergePackage(package_t *oldp, package_t *newp)
{
	//we don't track mirrors for previously-installed packages.
	//use the file list of the installed package, zips ignore the file list of the remote package but otherwise they must match to be mergeable
	//local installed copies of the package may lack some information, like mirrors.
	//the old package *might* be installed, the new won't be. this means we need to use the old's file list rather than the new
	if (!oldp->qhash || !strcmp(oldp->qhash?oldp->qhash:"", newp->qhash?newp->qhash:""))
	{
		unsigned int om, nm;
		struct packagedep_s *od, *nd;
		qboolean ignorefiles;
		for (om = 0; om < countof(oldp->mirror) && oldp->mirror[om]; om++)
			;
		for (nm = 0; nm < countof(newp->mirror) && newp->mirror[nm]; nm++)
			;
//		if (oldp->priority != newp->priority)
//			return false;

		ignorefiles = (oldp->extract==EXTRACT_ZIP);	//zips ignore the remote file list, its only important if its already installed (so just keep the old file list and its fine).
		if (oldp->extract != newp->extract)
		{	//if both have mirrors of different types then we have some sort of conflict
			if (ignorefiles || (om && nm))
				return false;
		}
		for (od = oldp->deps, nd = newp->deps; od && nd; )
		{
			//if its a zip then the 'remote' file list will be blank while the local list is not (we can just keep the local list).
			//if the file list DOES change, then bump the version.
			if ((od->dtype == DEP_FILE && ignorefiles) || od->dtype == DEP_SOURCE)
			{
				od = od->next;
				continue;
			}
			if ((nd->dtype == DEP_FILE && ignorefiles) || nd->dtype == DEP_SOURCE)
			{
				nd = nd->next;
				continue;
			}

			if (od->dtype != nd->dtype)
				return false;	//deps don't match
			if (strcmp(od->name, nd->name))
				return false;
			od = od->next;
			nd = nd->next;
		}

		//overwrite these. use the 'new' / remote values for each of them
		//the versions of the two packages will be the same, so the texts should be the same. still favour the new one so that things can be corrected serverside without needing people to redownload everything.
		if (newp->qhash){Z_Free(oldp->qhash); oldp->qhash = Z_StrDup(newp->qhash);}
		if (newp->description){Z_Free(oldp->description); oldp->description = Z_StrDup(newp->description);}
		if (newp->license){Z_Free(oldp->license); oldp->license = Z_StrDup(newp->license);}
		if (newp->author){Z_Free(oldp->author); oldp->author = Z_StrDup(newp->author);}
		if (newp->website){Z_Free(oldp->website); oldp->website = Z_StrDup(newp->website);}
		if (newp->previewimage){Z_Free(oldp->previewimage); oldp->previewimage = Z_StrDup(newp->previewimage);}

		if (newp->signature){Z_Free(oldp->signature); oldp->signature = Z_StrDup(newp->signature);}
		if (newp->filesha1){Z_Free(oldp->filesha1); oldp->previewimage = Z_StrDup(newp->filesha1);}
		if (newp->filesha512){Z_Free(oldp->filesha512); oldp->filesha512 = Z_StrDup(newp->filesha512);}
		if (newp->filesize){oldp->filesize = newp->filesize;}

		oldp->priority = newp->priority;

		if (nm)
		{	//copy over the mirrors
			oldp->extract = newp->extract;
			for (; nm --> 0 && om < countof(oldp->mirror); )
			{
				//skip it if this mirror was already known.
				unsigned int u;
				for (u = 0; u < om; u++)
				{
					if (!strcmp(oldp->mirror[u], newp->mirror[nm]))
						break;
				}
				if (u < om)
					continue;

				//new mirror! copy it over
				oldp->mirror[om++] = newp->mirror[nm];
				newp->mirror[nm] = NULL;
			}
		}
		//these flags should only remain set if set in both.
		oldp->flags &= ~(DPF_FORGETONUNINSTALL|DPF_TESTING|DPF_MANIFEST) | (newp->flags & (DPF_FORGETONUNINSTALL|DPF_TESTING|DPF_MANIFEST));

		for (nd = newp->deps; nd ; nd = nd->next)
		{
			if (nd->dtype == DEP_SOURCE)
			{
				if (!PM_HasDep(oldp, DEP_SOURCE, nd->name))
					PM_AddDep(oldp, DEP_SOURCE, nd->name);
			}
		}

		PM_FreePackage(newp);
		return true;
	}
	return false;
}

static package_t *PM_InsertPackage(package_t *p)
{
	package_t **link;
	int v;
	for (link = &availablepackages; *link; link = &(*link)->next)
	{
		package_t *prev = *link;
		if (((prev->flags|p->flags) & DPF_GUESSED) && prev->extract == p->extract && !strcmp(prev->gamedir, p->gamedir) && prev->fsroot == p->fsroot && !strcmp(prev->qhash?prev->qhash:"", p->qhash?p->qhash:""))
		{	//if one of the packages was guessed then match according to the qhash and file names.
			struct packagedep_s	*a = prev->deps, *b = p->deps;
			qboolean differs = false;
			for (;;)
			{
				while (a && a->dtype != DEP_FILE)
					a = a->next;
				while (b && b->dtype != DEP_FILE)
					b = b->next;
				if (!a && !b)
					break;
				if (a && b && !strcmp(a->name, b->name))
				{
					a = a->next;
					b = b->next;
					continue;	//matches...
				}
				differs = true;
				break;
			}
			if (differs)
				continue;
			else
			{
				if (p->flags & DPF_GUESSED)
				{	//the new one was guessed. just return the existing package instead.
					PM_FreePackage(p);
					return prev;
				}

				//FIXME: replace prev...
			}
		}
		v = strcmp(prev->name, p->name);
		if (v > 0)
			break;	//insert before this one
		else if (v == 0)
		{	//name matches.
			//if (!strcmp(p->fullname),prev->fullname)
			if (!strcmp(p->version, prev->version) && !strcmp(prev->qhash?prev->qhash:"", p->qhash?p->qhash:""))
			if (!strcmp(p->gamedir, prev->gamedir))
			if (!strcmp(p->arch?p->arch:"", prev->arch?prev->arch:""))
			{ /*package matches, merge them somehow, don't add*/
				package_t *a;
				if (PM_MergePackage(prev, p))
					return prev;
				for (a = p->alternative; a; a = a->next)
				{
					if (PM_MergePackage(a, p))
						return prev;
				}
				p->next = prev->alternative;
				prev->alternative = p;
				p->link = &prev->alternative;
				return prev;
			}

			//something major differs, display both independantly.
			p->flags |= DPF_DISPLAYVERSION;
			prev->flags |= DPF_DISPLAYVERSION;
		}
	}
	PM_ValidatePackage(p);

	if (p->flags & DPF_MANIFEST)
		if (!(p->flags & (DPF_PRESENT|DPF_CACHED)))
		{	//if a manifest wants it then there's only any point listing it if there's an actual mirror listed. otherwise its a hint to the filesystem for ordering and not something that's actually present.
			int i;
			for (i = 0; i < countof(p->mirror); i++)
				if (p->mirror[i])
					break;
			if (i == countof(p->mirror))
			{
				PM_FreePackage(p);
				return NULL;
			}
		}

	p->next = *link;
	p->link = link;
	*link = p;
	numpackages++;
	return p;
}

static qboolean PM_CheckFeature(const char *feature, const char **featurename, const char **concommand)
{
#ifdef HAVE_CLIENT
	extern cvar_t r_replacemodels;
#endif
	*featurename = NULL;
	*concommand = NULL;
#ifdef HAVE_CLIENT
	//check for compressed texture formats, to warn when not supported.
	if (!strcmp(feature, "bc1") || !strcmp(feature, "bc2") || !strcmp(feature, "bc3") || !strcmp(feature, "s3tc"))
		return *featurename="S3 Texture Compression", sh_config.hw_bc>=1;
	if (!strcmp(feature, "bc4") || !strcmp(feature, "bc5") || !strcmp(feature, "rgtc"))
		return *featurename="Red/Green Texture Compression", sh_config.hw_bc>=2;
	if (!strcmp(feature, "bc6") || !strcmp(feature, "bc7") || !strcmp(feature, "bptc"))
		return *featurename="Block Partitioned Texture Compression", sh_config.hw_bc>=3;
	if (!strcmp(feature, "etc1"))
		return *featurename="Ericson Texture Compression, Original", sh_config.hw_etc>=1;
	if (!strcmp(feature, "etc2") || !strcmp(feature, "eac"))
		return *featurename="Ericson Texture Compression, Revision 2", sh_config.hw_etc>=2;
	if (!strcmp(feature, "astcldr") || !strcmp(feature, "astc"))
		return *featurename="Adaptive Scalable Texture Compression (LDR)", sh_config.hw_astc>=1;
	if (!strcmp(feature, "astchdr"))
		return *featurename="Adaptive Scalable Texture Compression (HDR)", sh_config.hw_astc>=2;

	if (!strcmp(feature, "24bit"))
		return *featurename="24bit Textures", *concommand="seta gl_load24bit 1\n", gl_load24bit.ival;
	if (!strcmp(feature, "md3"))
		return *featurename="Replacement Models", *concommand="seta r_replacemodels md3 md2\n", !!strstr(r_replacemodels.string, "md3");
	if (!strcmp(feature, "rtlights"))
		return *featurename="Realtime Dynamic Lights", *concommand="seta r_shadow_realtime_dlight 1\n", r_shadow_realtime_dlight.ival||r_shadow_realtime_world.ival;
	if (!strcmp(feature, "rtworld"))
		return *featurename="Realtime World Lights", *concommand="seta r_shadow_realtime_dlight 1\nseta r_shadow_realtime_world 1\n", r_shadow_realtime_world.ival;
#endif

	return false;
}
static qboolean PM_CheckPackageFeatures(package_t *p)
{
	struct packagedep_s *dep;
	const char *featname, *enablecmd;

	for (dep = p->deps; dep; dep = dep->next)
	{
		if (dep->dtype == DEP_NEEDFEATURE)
		{
			if (!PM_CheckFeature(dep->name, &featname, &enablecmd))
				return false;
		}
	}
	return true;
}

static qboolean PM_CheckFile(const char *filename, enum fs_relative base)
{
	vfsfile_t *f = FS_OpenVFS(filename, "rb", base);
	if (f)
	{
		VFS_CLOSE(f);
		return true;
	}
	return false;
}

static void PM_AddSubList(const char *url, const char *prefix, unsigned int flags)
{
	size_t i;
	if (!prefix)
		prefix = "";
	if (!*url)
		return;
	if (strchr(url, '\"') || strchr(url, '\n'))
		return;
	if (strchr(prefix, '\"') || strchr(prefix, '\n'))
		return;

	for (i = 0; i < pm_numsources; i++)
	{
		if (!strcmp(pm_source[i].url, url))
		{
			unsigned int newpri = flags&SRCFLMASK_FROM;
			unsigned int oldpri = pm_source[i].flags&SRCFLMASK_FROM;
			if (newpri > oldpri)
			{	//replacing an historic package should stomp on most of it, retaining only its enablement status.
				pm_source[i].flags &= ~SRCFLMASK_FROM;
				pm_source[i].flags |= flags&(SRCFLMASK_FROM);

				Z_Free(pm_source[i].prefix);
				pm_source[i].prefix = Z_StrDup(prefix);
			}
			break;
		}
	}
	if (i == pm_numsources)
	{
		Z_ReallocElements((void*)&pm_source, &pm_numsources, i+1, sizeof(*pm_source));

		pm_source[i].status = SRCSTAT_UNTRIED;
		pm_source[i].flags = flags;

		pm_source[i].url = BZ_Malloc(strlen(url)+1);
		strcpy(pm_source[i].url, url);

		pm_source[i].prefix = BZ_Malloc(strlen(prefix)+1);
		strcpy(pm_source[i].prefix, prefix);
	}
}
#ifdef WEBCLIENT
static void PM_RemSubList(const char *url)
{
	int i;
	for (i = 0; i < pm_numsources; )
	{
		if (!strcmp(pm_source[i].url, url))
		{
			if (pm_source[i].curdl)
			{
				DL_Close(pm_source[i].curdl);
				pm_source[i].curdl = NULL;
			}
			//don't actually remove it, that'd mess up the indexes which could break stuff like PM_ListDownloaded callbacks. :(
			pm_source[i].flags = SRCFL_HISTORIC;	//forget enablement state etc. we won't bother writing it.
			downloadablessequence++;	//make sure any menus hide it.
			break;
		}
		else
			i++;
	}
}
#endif

struct packagesourceinfo_s
{
	unsigned int parseflags;	//0 for a downloadable ones, or DPF_FORGETONUNINSTALL|DPF_ENABLED for the installed package list.
	const char *url;
	const char *categoryprefix;

	enum hashvalidation_e validated;

	int version;
	char gamedir[64];	//when not overridden...
	char mirror[MAXMIRRORS][MAX_OSPATH];
	int nummirrors;
};
static const char *PM_ParsePackage(struct packagesourceinfo_s *source, const char *tokstart, int wantvariation)
{
	package_t *p;
	struct packagedep_s *dep;
	qboolean isauto = false;
	const char *start = tokstart;
	int variation = 0;	//variation we're currently parsing (or skipping...).
	qboolean invariation = false;


#if 0
	if (version < 2)
	{
		char pathname[256];
		const char *fullname = Cmd_Argv(0);
		if (argc > 5 || argc < 3)
		{
			Con_Printf("Package list is bad - %s\n", line);
			continue;	//but try the next line away
		}

		p = Z_Malloc(sizeof(*p));
		if (*prefix)
			Q_snprintfz(pathname, sizeof(pathname), "%s/%s", prefix, fullname);
		else
			Q_snprintfz(pathname, sizeof(pathname), "%s", fullname);
		p->name = Z_StrDup(COM_SkipPath(pathname));
		p->title = Z_StrDup(p->name);
		*COM_SkipPath(pathname) = 0;
		p->category = Z_StrDup(pathname);
		p->mirror[0] = Z_StrDup(p->name);

		p->priority = PM_DEFAULTPRIORITY;
		p->flags = parseflags;

		p->mirror[0] = Z_StrDup(Cmd_Argv(1));
		PM_AddDep(p, DEP_FILE, Cmd_Argv(2));
		Q_strncpyz(p->version, Cmd_Argv(3), sizeof(p->version));
		Q_strncpyz(p->gamedir, Cmd_Argv(4), sizeof(p->gamedir));
		if (!strcmp(p->gamedir, "../"))
		{
			p->fsroot = FS_ROOT;
			*p->gamedir = 0;
		}
		else
		{
			if (!*p->gamedir)
			{
				strcpy(p->gamedir, FS_GetGamedir(false));
//				p->fsroot = FS_GAMEONLY;
			}
			p->fsroot = FS_ROOT;
		}
	}
	else
#endif
	{
		char pathname[256];
		char *fullname = (source->version >= 3)?NULL:Z_StrDup(com_token);
		char *file = NULL;
		char *url = NULL;
		char *category = NULL;
		unsigned int flags = source->parseflags;
		int i;

		if (source->version > 2)	//v3 has an 'installed' token to say its enabled. v2 has a 'stale' token to say its old, which was weird and to try to avoid conflicts.
			flags &= ~DPF_ENABLED;

		p = Z_Malloc(sizeof(*p));
		p->extract = EXTRACT_COPY;
		p->priority = PM_DEFAULTPRIORITY;
		p->fsroot = FS_ROOT;
		Q_strncpyz(p->gamedir, source->gamedir, sizeof(p->gamedir));
		for (i = 1; tokstart; i++)
		{
			char *eq;
			char key[8192];
			char val[8192];

			//skip leading whitespace
			while (*tokstart>0 && *tokstart <= ' ')
				tokstart++;

			if (source->version >= 3)
			{
				tokstart = COM_ParseCString (tokstart, key, sizeof(key), NULL);
				if (!strcmp(key, "}"))
				{
					if (invariation)
					{
						invariation = false;
						variation++;
						continue;
					}
					else
						break;	//end of package.
				}
				else if (!strcmp(key, "{"))
				{
					if (invariation)	//some sort of corruption? stop here.
						break;
					invariation = true;
					continue;
				}
				tokstart = COM_ParseCString (tokstart, val, sizeof(val), NULL);

				if (invariation && variation != wantvariation)
					continue;	//we're parsing one of the other variations. ignore this.
			}
			else
			{
				//the following are [\]["]key=["]value["] parameters, which is definitely messy, yes.
				*val = 0;
				if (*tokstart == '\\' || *tokstart == '\"')
				{	//legacy quoting
					tokstart = COM_StringParse (tokstart, key, sizeof(key), false, false);
					eq = strchr(key, '=');
					if (eq)
					{
						*eq = 0;
						Q_strncpyz(val, eq+1, sizeof(val));
					}
				}
				else
				{
					tokstart = COM_ParseTokenOut(tokstart, "=", key, sizeof(key), NULL);
					if (!*key)
						continue;
					if (tokstart && *tokstart == '=')
					{
						tokstart++;
						if (!(*tokstart >= 0 && *tokstart <= ' '))
							tokstart = COM_ParseCString(tokstart, val, sizeof(val), NULL);
					}
				}
			}

			if (!strcmp(key, "package"))
				Z_StrDupPtr(&fullname, val);
			else if (!strcmp(key, "url"))
				Z_StrDupPtr(&url, val);
			else if (!strcmp(key, "category"))
				Z_StrDupPtr(&category, val);
			else if (!strcmp(key, "title"))
				Z_StrDupPtr(&p->title, val);
			else if (!strcmp(key, "gamedir"))
				Q_strncpyz(p->gamedir, val, sizeof(p->gamedir));
			else if (!strcmp(key, "ver") || !strcmp(key, "v"))
				Q_strncpyz(p->version, val, sizeof(p->version));
			else if (!strcmp(key, "arch"))
				Z_StrDupPtr(&p->arch, val);
			else if (!strcmp(key, "priority"))
				p->priority = atoi(val);
			else if (!strcmp(key, "qhash"))
				Z_StrDupPtr(&p->qhash, val);
			else if (!strcmp(key, "desc") || !strcmp(key, "description"))
			{
				if (p->description)
					Z_StrCat(&p->description, "\n");
				Z_StrCat(&p->description, val);
			}
			else if (!strcmp(key, "license"))
				Z_StrDupPtr(&p->license, val);
			else if (!strcmp(key, "author"))
				Z_StrDupPtr(&p->author, val);
			else if (!strcmp(key, "preview"))
				Z_StrDupPtr(&p->previewimage, val);
			else if (!strcmp(key, "website"))
				Z_StrDupPtr(&p->website, val);
			else if (!strcmp(key, "unzipfile"))
			{	//filename extracted from zip.
				p->extract = EXTRACT_EXPLICITZIP;
				PM_AddDep(p, DEP_EXTRACTNAME, val);
			}
			else if (!strcmp(key, "file"))
			{	//installed file
				if (!file)
					Z_StrDupPtr(&file, val);
				PM_AddDep(p, DEP_FILE, val);
			}
			else if (!strcmp(key, "extract"))
			{
				if (!strcmp(val, "xz"))
					p->extract = EXTRACT_XZ;
				else if (!strcmp(val, "gz"))
					p->extract = EXTRACT_GZ;
				else if (!strcmp(val, "zip"))
					p->extract = EXTRACT_ZIP;
				else if (!strcmp(val, "zip_explicit"))
					p->extract = EXTRACT_EXPLICITZIP;
				else
					Con_Printf("Unknown decompression method: %s\n", val);
			}
			else if (!strcmp(key, "depend"))
				PM_AddDep(p, DEP_REQUIRE, val);
			else if (!strcmp(key, "conflict"))
				PM_AddDep(p, DEP_CONFLICT, val);
			else if (!strcmp(key, "replace"))
				PM_AddDep(p, DEP_REPLACE, val);
			else if (!strcmp(key, "fileconflict"))
				PM_AddDep(p, DEP_FILECONFLICT, val);
			else if (!strcmp(key, "recommend"))
				PM_AddDep(p, DEP_RECOMMEND, val);
			else if (!strcmp(key, "suggest"))
				PM_AddDep(p, DEP_SUGGEST, val);
			else if (!strcmp(key, "need"))
				PM_AddDep(p, DEP_NEEDFEATURE, val);
			else if (!strcmp(key, "test"))
				flags |= DPF_TESTING;
			else if (!strcmp(key, "guessed"))
				flags |= DPF_GUESSED;
			else if (!strcmp(key, "stale") && source->version==2)
				flags &= ~DPF_ENABLED;	//known about, (probably) cached, but not actually enabled.
			else if (!strcmp(key, "enabled") && source->version>2)
				flags |= source->parseflags & DPF_ENABLED;
			else if (!strcmp(key, "auto"))
				isauto = true;	//autoinstalled and NOT user-installed
			else if (!strcmp(key, "root") && (source->parseflags&DPF_ENABLED))
			{
				if (!Q_strcasecmp(val, "bin"))
					p->fsroot = FS_BINARYPATH;
				else
					p->fsroot = FS_ROOT;
			}
			else if (!strcmp(key, "dlsize"))
				p->filesize = strtoull(val, NULL, 0);
			else if (!strcmp(key, "sha1"))
				Z_StrDupPtr(&p->filesha1, val);
			else if (!strcmp(key, "sha512"))
				Z_StrDupPtr(&p->filesha512, val);
			else if (!strcmp(key, "sign"))
				Z_StrDupPtr(&p->signature, val);
			else
			{
				Con_DPrintf("Unknown package property\n");
			}
		}

		if (!fullname)
			fullname = Z_StrDup("UNKNOWN");
//		Con_Printf("%s - %s\n", source->url, fullname);

		if (category)
		{
			p->name = fullname;

			if (*source->categoryprefix)
				Q_snprintfz(pathname, sizeof(pathname), "%s/%s", source->categoryprefix, category);
			else
				Q_snprintfz(pathname, sizeof(pathname), "%s", category);
			if (*pathname)
			{
				if (pathname[strlen(pathname)-1] != '/')
					Q_strncatz(pathname, "/", sizeof(pathname));
			}
			p->category = Z_StrDup(pathname);
		}
		else
		{
			if (*source->categoryprefix)
				Q_snprintfz(pathname, sizeof(pathname), "%s/%s", source->categoryprefix, fullname);
			else
				Q_snprintfz(pathname, sizeof(pathname), "%s", fullname);
			Z_Free(fullname);
			p->name = Z_StrDup(COM_SkipPath(pathname));
			*COM_SkipPath(pathname) = 0;
			p->category = Z_StrDup(pathname);
		}

		if (!p->title)
			p->title = Z_StrDup(p->name);

		p->flags = flags;

		if (url && (!strncmp(url, "http://", 7) || !strncmp(url, "https://", 8)))
			p->mirror[0] = Z_StrDup(url);
		else
		{
			int m;
			char *ext = "";
			char *relurl = url;
			if (!relurl)
			{
				if (p->extract == EXTRACT_XZ)
					ext = ".xz";
				else if (p->extract == EXTRACT_GZ)
					ext = ".gz";
				else if (p->extract == EXTRACT_ZIP || p->extract == EXTRACT_EXPLICITZIP)
					ext = ".zip";
				relurl = file;
			}
			if (relurl)
			{
				for (m = 0; m < source->nummirrors; m++)
					p->mirror[m] = Z_StrDup(va("%s%s%s", source->mirror[m], relurl, ext));
			}
		}

		PM_ValidateAuthenticity(p, source->validated);

		Z_Free(file);
		Z_Free(url);
		Z_Free(category);
	}
	if (p->arch)
	{
		if (!Q_strcasecmp(p->arch, THISENGINE))
		{
			if (!Sys_EngineMayUpdate())
				p->flags |= DPF_HIDDEN;
			else
				p->flags |= DPF_ENGINE;
		}
		else if (!Q_strcasecmp(p->arch, THISARCH))
		{
			if ((p->fsroot == FS_ROOT || p->fsroot == FS_BINARYPATH) && !*p->gamedir && p->priority == PM_DEFAULTPRIORITY)
				p->flags |= DPF_PLUGIN;
		}
		else
			p->flags |= DPF_HIDDEN;	//other engine builds or other cpus are all hidden
	}
	for (dep = p->deps; dep; dep = dep->next)
	{
		if (dep->dtype == DEP_FILECONFLICT)
		{
			const char *n;
			if (*p->gamedir)
				n = va("%s/%s", p->gamedir, dep->name);
			else
				n = dep->name;
			if (PM_CheckFile(n, p->fsroot))
				p->flags |= DPF_HIDDEN;
		}
	}
	if (p->flags & DPF_ENABLED)
	{
		if (isauto)
			p->flags |= DPF_AUTOMARKED;	//FIXME: we don't know if this was manual or auto
		else
			p->flags |= DPF_USERMARKED;	//FIXME: we don't know if this was manual or auto
	}

	if (source->url)
		PM_AddDep(p, DEP_SOURCE, source->url);

	PM_InsertPackage(p);

	if (wantvariation == 0)	//only the first!
	{
		while (++wantvariation < variation)
			if (tokstart != PM_ParsePackage(source, start, wantvariation))
			{
				Con_Printf(CON_ERROR"%s: Unable to parse package variation...\n", source->url);
				break;	//erk?
			}
	}

	return tokstart;
}

static qboolean PM_ParsePackageList(const char *f, unsigned int parseflags, const char *url, const char *prefix)
{
	char line[65536];
	size_t l;
	char *sl;

	struct packagesourceinfo_s source = {parseflags, url, prefix};
	char *tokstart;
	qboolean forcewrite = false;

	const char *filestart = f, *linestart;

	if (!f)
		return forcewrite;

	source.validated = (parseflags & DPF_ENABLED)?VH_CORRECT/*FIXME*/:VH_UNSUPPORTED;
	Q_strncpyz(source.gamedir, FS_GetGamedir(false), sizeof(source.gamedir));

	if (url)
	{
		Q_strncpyz(source.mirror[source.nummirrors], url, sizeof(source.mirror[source.nummirrors]));
		sl = COM_SkipPath(source.mirror[source.nummirrors]);
		*sl = 0;
		source.nummirrors++;
	}

	do
	{
		for (l = 0;*f;)
		{
			if (*f == '\r' || *f == '\n')
			{
				if (f[0] == '\r' && f[1] == '\n')
					f++;
				f++;
				break;
			}
			if (l < sizeof(line)-1)
				line[l++] = *f;
			else
				line[0] = 0;
			f++;
		}
		line[l] = 0;

		Cmd_TokenizeString (line, false, false);
	} while (!Cmd_Argc() && *f);

	if (strcmp(Cmd_Argv(0), "version"))
		return forcewrite;	//it's not the right format.

	source.version = atoi(Cmd_Argv(1));
	if (
#ifdef HAVE_LEGACY
		source.version != 0 && source.version != 1 &&
#endif
		source.version != 2 && source.version != 3)
	{
		Con_Printf("Packagelist is of a future or incompatible version\n");
		return forcewrite;	//it's not the right version.
	}

	while(*f)
	{
		linestart = f;
		for (l = 0;*f;)
		{
			if (*f == '\r' || *f == '\n')
			{
				if (f[0] == '\r' && f[1] == '\n')
					f++;
				f++;
				break;
			}
			if (l < sizeof(line)-1)
				line[l++] = *f;
			else
				line[0] = 0;
			f++;
		}
		line[l] = 0;

		tokstart = COM_StringParse (line, com_token, sizeof(com_token), false, false);
		if (*com_token)
		{
			if (!strcmp(com_token, "signature"))
			{	//FIXME: local file should hash /etc/machine-id with something, to avoid file-dropping dll-loading hacks.
				//signature "authority" "signdata"
#if 0
				(void)filestart;
				(void)linestart;
#else
				if (source.validated == VH_UNSUPPORTED)
				{	//only allow one valid signature line...
					char authority[MAX_OSPATH];
					char signdata[MAX_OSPATH];
					char signature_base64[MAX_OSPATH];
					size_t signsize;
					enum hashvalidation_e r;
					hashfunc_t *hf = &hash_sha512;
					void *hashdata = Z_Malloc(hf->digestsize);
					void *hashctx = Z_Malloc(hf->contextsize);
					tokstart = COM_StringParse (tokstart, authority, sizeof(authority), false, false);
					tokstart = COM_StringParse (tokstart, signature_base64, sizeof(signature_base64), false, false);

					signsize = Base64_DecodeBlock(signature_base64, NULL, signdata, sizeof(signdata));
					hf->init(hashctx);
					hf->process(hashctx, filestart, linestart-filestart);	//hash the text leading up to the signature line
					hf->process(hashctx, f, strlen(f));						//and hash the data after it. so the only bit not hashed is the signature itself.
					hf->terminate(hashdata, hashctx);
					Z_Free(hashctx);
					r = VH_UNSUPPORTED;//preliminary

					(void)signsize;
					//try and get one of our providers to verify it...
					#ifdef HAVE_WINSSPI
						if (r == VH_UNSUPPORTED)
							r = SSPI_VerifyHash(hashdata, hf->digestsize, authority, signdata, signsize);
					#endif
					#ifdef HAVE_GNUTLS
						if (r == VH_UNSUPPORTED)
							r = GNUTLS_VerifyHash(hashdata, hf->digestsize, authority, signdata, signsize);
					#endif
					#ifdef HAVE_OPENSSL
						if (r == VH_UNSUPPORTED)
							r = OSSL_VerifyHash(hashdata, hf->digestsize, authority, signdata, signsize);
					#endif

					Z_Free(hashdata);
					source.validated = r;
				}
#endif
				continue;
			}

			if (!strcmp(com_token, "sublist"))
			{
				char *subprefix;
				char url[MAX_OSPATH];
				char enablement[MAX_OSPATH];
				tokstart = COM_StringParse (tokstart, url, sizeof(url), false, false);
				tokstart = COM_StringParse (tokstart, com_token, sizeof(com_token), false, false);
				if (*prefix)
					subprefix = va("%s/%s", prefix, com_token);
				else
					subprefix = com_token;

				if (parseflags & DPF_ENABLED)
				{	//local file. a user-defined source that was previously registered (but may have been disabled)
					tokstart = COM_StringParse (tokstart, enablement, sizeof(enablement), false, false);
					if (!Q_strcasecmp(enablement, "enabled"))
						PM_AddSubList(url, subprefix, SRCFL_USER|SRCFL_ENABLED);
					else
						PM_AddSubList(url, subprefix, SRCFL_USER|SRCFL_DISABLED);
				}
				else	//a nested source. will need to inherit enablement the long way.
					PM_AddSubList(url, subprefix, SRCFL_NESTED);	//nested sources should be disabled by default.
				continue;
			}
			if (!strcmp(com_token, "source"))
			{	//`source URL ENABLED|DISABLED` -- valid ONLY in an installed.lst file
				char url[MAX_OSPATH];
				char enablement[MAX_OSPATH];
				tokstart = COM_StringParse (tokstart, url, sizeof(url), false, false);
				tokstart = COM_StringParse (tokstart, enablement, sizeof(enablement), false, false);
				if (parseflags & DPF_ENABLED)
				{
					if (!Q_strcasecmp(enablement, "enabled"))
						PM_AddSubList(url, NULL, SRCFL_HISTORIC|SRCFL_ENABLED);
					else
						PM_AddSubList(url, NULL, SRCFL_HISTORIC|SRCFL_DISABLED);
				}
				//else ignore possible exploits with sources trying to force-enable themselves.

				continue;
			}
			if (!strcmp(com_token, "set"))
			{
				tokstart = COM_StringParse (tokstart, com_token, sizeof(com_token), false, false);
				if (!strcmp(com_token, "gamedir"))
				{
					tokstart = COM_StringParse (tokstart, com_token, sizeof(com_token), false, false);
					if (!*com_token)
						Q_strncpyz(source.gamedir, FS_GetGamedir(false), sizeof(source.gamedir));
					else
						Q_strncpyz(source.gamedir, com_token, sizeof(source.gamedir));
				}
				else if (!strcmp(com_token, "mirrors"))
				{
					source.nummirrors = 0;
					while (source.nummirrors < countof(source.mirror) && tokstart)
					{
						tokstart = COM_StringParse (tokstart, com_token, sizeof(com_token), false, false);
						if (*com_token)
						{
							Q_strncpyz(source.mirror[source.nummirrors], com_token, sizeof(source.mirror[source.nummirrors]));
							source.nummirrors++;
						}
					}
				}
				else if (!strcmp(com_token, "updatemode"))
				{
					tokstart = COM_StringParse (tokstart, com_token, sizeof(com_token), false, false);
					if (parseflags & DPF_ENABLED)	//don't use a downloaded file's version of this, only use the local version of it.
						Cvar_ForceSet(&pkg_autoupdate, com_token);
				}
				else if (!strcmp(com_token, "declined"))
				{
					if (parseflags & DPF_ENABLED)	//don't use a downloaded file's version of this, only use the local version of it.
					{
						tokstart = COM_StringParse (tokstart, com_token, sizeof(com_token), false, false);
						Z_Free(declinedpackages);
						if (*com_token)
							declinedpackages = Z_StrDup(com_token);
						else
							declinedpackages = NULL;
					}
				}
				else
				{
					//erk
					Con_Printf("%s: unrecognised command - set %s\n", source.url, com_token);
				}
				continue;
			}

			if (!strcmp(com_token, "{"))
			{
				linestart = COM_StringParse (linestart, com_token, sizeof(com_token), false, false);
				f = PM_ParsePackage(&source, linestart, 0);
				if (!f)
					break;	//erk!
			}
			else if (source.version < 3)
			{	//old single-line gibberish
				PM_ParsePackage(&source, tokstart, -1);
			}
			else
			{
				Con_Printf("%s: unrecognised command - %s\n", source.url, com_token);
			}
		}
	}

	return forcewrite;
}

#ifdef PLUGINS
void PM_EnumeratePlugins(void (*callback)(const char *name))
{
	package_t *p;
	struct packagedep_s *d;

	PM_PreparePackageList();

	for (p = availablepackages; p; p = p->next)
	{
		if ((p->flags & DPF_ENABLED) && (p->flags & DPF_PLUGIN))
		{
			for (d = p->deps; d; d = d->next)
			{
				if (d->dtype == DEP_FILE)
				{
					if (!Q_strncasecmp(d->name, PLUGINPREFIX, strlen(PLUGINPREFIX)))
						callback(d->name);
				}
			}
		}
	}
}
#endif

#ifdef PLUGINS
static package_t *PM_FindExactPackage(const char *packagename, const char *arch, const char *version, unsigned int flags);
static package_t *PM_FindPackage(const char *packagename);
static int QDECL PM_EnumeratedPlugin (const char *name, qofs_t size, time_t mtime, void *param, searchpathfuncs_t *spath)
{
	static const char *knownarch[] =
	{
		"x32", "x64", "amd64", "x86",	//various x86 ABIs
		"arm", "arm64", "armhf",		//various arm ABIs
		"ppc", "unk",					//various misc ABIs
	};
	package_t *p;
	struct packagedep_s *dep;
	char vmname[MAX_QPATH];
	int len, l, a;
	char *dot;
	const char *synthver = "??""??";
	if (!strncmp(name, PLUGINPREFIX, strlen(PLUGINPREFIX)))
		Q_strncpyz(vmname, name+strlen(PLUGINPREFIX), sizeof(vmname));
	else
		Q_strncpyz(vmname, name, sizeof(vmname));
	len = strlen(vmname);
	l = strlen(ARCH_CPU_POSTFIX ARCH_DL_POSTFIX);
	if (len > l && !strcmp(vmname+len-l, ARCH_CPU_POSTFIX ARCH_DL_POSTFIX))
	{
		len -= l;
		vmname[len] = 0;
	}
	else
	{
		dot = strchr(vmname, '.');
		if (dot)
		{
			*dot = 0;
			len = strlen(vmname);

			//if we can find a known cpu arch there then ignore it - its a different cpu arch
			for (a = 0; a < countof(knownarch); a++)
			{
				l = strlen(knownarch[a]);
				if (len > l && !Q_strcasecmp(vmname + len-l, knownarch[a]))
					return true;	//wrong arch! ignore it.
			}
		}
	}
	if (len > 0 && vmname[len-1] == '_')
		vmname[len-1] = 0;

	for (p = availablepackages; p; p = p->next)
	{
		if (!(p->flags & DPF_PLUGIN))
			continue;
		for (dep = p->deps; dep; dep = dep->next)
		{
			if (dep->dtype != DEP_FILE)
				continue;
			if (!Q_strcasecmp(dep->name, name))
				return true;
		}
	}

	if (PM_FindExactPackage(vmname, NULL, NULL, 0))
		return true;	//don't include it if its a dupe anyway.
	//FIXME: should be checking whether there's a package that provides the file...

	p = Z_Malloc(sizeof(*p));
	p->deps = Z_Malloc(sizeof(*p->deps) + strlen(name));
	p->deps->dtype = DEP_FILE;
	strcpy(p->deps->name, name);
	p->arch = Z_StrDup(THISARCH);
	p->name = Z_StrDup(vmname);
	p->title = Z_StrDup(vmname);
	p->category = Z_StrDup("Plugins/");
	p->priority = PM_DEFAULTPRIORITY;
	p->fsroot = FS_BINARYPATH;
	strcpy(p->version, synthver);
	p->flags = DPF_PLUGIN|DPF_NATIVE|DPF_FORGETONUNINSTALL;
#ifdef ENABLEPLUGINSBYDEFAULT
	p->flags |= DPF_USERMARKED|DPF_ENABLED;
#else
	*(int*)param = true;
#endif
	PM_InsertPackage(p);

	return true;
}
#ifndef SERVERONLY
#ifndef ENABLEPLUGINSBYDEFAULT
static void PM_PluginDetected(void *ctx, int status)
{
	if (status != PROMPT_CANCEL)
		PM_WriteInstalledPackages();
	if (status == PROMPT_YES)	//'view'...
	{
		Cmd_ExecuteString("menu_download\n", RESTRICT_LOCAL);
		Cmd_ExecuteString("menu_download \"Plugins/\"\n", RESTRICT_LOCAL);
	}
}
#endif
#endif
#endif

#ifndef SERVERONLY
void PM_AutoUpdateQuery(void *ctx, promptbutton_t status)
{
	if (status == PROMPT_CANCEL)
		return; //'Later'
	if (status == PROMPT_YES)
		Cmd_ExecuteString("menu_download\n", RESTRICT_LOCAL);
	Menu_Download_Update();
}
#endif

static void PM_PreparePackageList(void)
{
	//figure out what we've previously installed.
	if (fs_manifest && !loadedinstalled)
	{
		qofs_t sz = 0;
		char *f = FS_MallocFile(INSTALLEDFILES, FS_ROOT, &sz);
		loadedinstalled = true;
		if (f)
		{
			if (PM_ParsePackageList(f, DPF_FORGETONUNINSTALL|DPF_ENABLED, NULL, ""))
				PM_WriteInstalledPackages();
			BZ_Free(f);
		}
		//make sure our sources are okay.
		if (fs_manifest && fs_manifest->downloadsurl && *fs_manifest->downloadsurl)
		{
			if (fs_manifest->security==MANIFEST_SECURITY_NOT)
				PM_AddSubList(fs_manifest->downloadsurl, NULL, SRCFL_MANIFEST);	//don't trust it, don't even prompt.
			else
				PM_AddSubList(fs_manifest->downloadsurl, NULL, SRCFL_MANIFEST|SRCFL_ENABLED);	//enable it by default. functionality is kinda broken otherwise.
		}

#ifdef PLUGINS
		{
			int foundone = false;
			char nat[MAX_OSPATH];
			FS_NativePath("", FS_BINARYPATH, nat, sizeof(nat));
			Con_DPrintf("Loading plugins from \"%s\"\n", nat);
			Sys_EnumerateFiles(nat, PLUGINPREFIX"*" ARCH_DL_POSTFIX, PM_EnumeratedPlugin, &foundone, NULL);
#ifndef ENABLEPLUGINSBYDEFAULT
			if (foundone && !pluginpromptshown)
			{
				pluginpromptshown = true;
#ifndef SERVERONLY
				Menu_Prompt(PM_PluginDetected, NULL, "Plugin(s) appears to have\nbeen installed externally.\nUse the updates menu\nto enable them.", "View", "Disable", "Later...");
#endif
			}
#endif
		}
#endif
	}
}

void PM_LoadPackages(searchpath_t **oldpaths, const char *parent_pure, const char *parent_logical, searchpath_t *search, unsigned int loadstuff, int minpri, int maxpri)
{
	package_t *p;
	struct packagedep_s *d;
	char temp[MAX_OSPATH];
	int pri;

	//figure out what we've previously installed.
	PM_PreparePackageList();

	do
	{
		//find the lowest used priority above the previous
		pri = maxpri;
		for (p = availablepackages; p; p = p->next)
		{
			if ((p->flags & DPF_ENABLED) && p->qhash && p->priority>=minpri&&p->priority<pri && !Q_strcasecmp(parent_pure, p->gamedir))
				pri = p->priority;
		}
		minpri = pri+1;

		for (p = availablepackages; p; p = p->next)
		{
			if ((p->flags & DPF_ENABLED) && p->qhash && p->priority==pri && !Q_strcasecmp(parent_pure, p->gamedir))
			{
				for (d = p->deps; d; d = d->next)
				{
					if (d->dtype == DEP_FILE)
					{
						Q_snprintfz(temp, sizeof(temp), "%s/%s", p->gamedir, d->name);
						FS_AddHashedPackage(oldpaths, parent_pure, parent_logical, search, loadstuff, temp, p->qhash, NULL, SPF_COPYPROTECTED|SPF_UNTRUSTED);
					}
				}
			}
		}
	} while (pri < maxpri);
}

void PM_Shutdown(qboolean soft)
{
	//free everything...

	downloadablessequence++;

	while(pm_numsources > 0)
	{
		size_t i = --pm_numsources;

#ifdef WEBCLIENT
		if (pm_source[i].curdl)
		{
			DL_Close(pm_source[i].curdl);
			pm_source[i].curdl = NULL;
		}
#endif
		pm_source[i].status = SRCSTAT_UNTRIED;
		Z_Free(pm_source[i].url);
		pm_source[i].url = NULL;
		Z_Free(pm_source[i].prefix);
		pm_source[i].prefix = NULL;
	}
	Z_Free(pm_source);
	pm_source = NULL;

	if (!soft)
	{
		while (availablepackages)
			PM_FreePackage(availablepackages);
	}
	loadedinstalled = false;
}

//finds the newest version
static package_t *PM_FindExactPackage(const char *packagename, const char *arch, const char *version, unsigned int flags)
{
	package_t *p, *r = NULL;
	if (arch && !*arch) arch = NULL;
	if (version && !*version) version = NULL;

	for (p = availablepackages; p; p = p->next)
	{
		if (!strcmp(p->name, packagename))
		{
			if (arch && (!p->arch||strcmp(p->arch, arch)))
				continue;	//wrong arch.
			if (!arch && p->arch && *p->arch && strcmp(p->arch, THISARCH))
				continue;	//wrong arch.
			if (flags && !(p->flags & flags))
				continue;
			if (version)
			{	//versions are a bit more complex.
				if (*version == '=' && strcmp(p->version, version+1))
					continue;
				if (*version == '>' && strcmp(p->version, version+1)<=0)
					continue;
				if (*version == '<' && strcmp(p->version, version+1)>=0)
					continue;
			}
			if (!r || strcmp(r->version, p->version)>0)
				r = p;
		}
	}
	return r;
}
static package_t *PM_FindPackage(const char *packagename)
{
	char *t = strcpy(alloca(strlen(packagename)+2), packagename);
	char *arch = strchr(t, ':');
	char *ver = strchr(t, '=');
	if (!ver)
		ver = strchr(t, '>');
	if (!ver)
		ver = strchr(t, '<');
	if (arch)
		*arch++ = 0;
	if (ver)
	{
		*ver = 0;
		return PM_FindExactPackage(t, arch, packagename + (ver-t), 0);	//weirdness is because the leading char of the version is important.
	}
	else
		return PM_FindExactPackage(t, arch, NULL, 0);
}
//returns the marked version of a package, if any.
static package_t *PM_MarkedPackage(const char *packagename, int markflag)
{
	char *t = strcpy(alloca(strlen(packagename)+2), packagename);
	char *arch = strchr(t, ':');
	char *ver = strchr(t, '=');
	if (!markflag)
		return NULL;
	if (!ver)
		ver = strchr(t, '>');
	if (!ver)
		ver = strchr(t, '<');
	if (arch)
		*arch++ = 0;
	if (ver)
	{
		*ver = 0;
		return PM_FindExactPackage(t, arch, packagename + (ver-t), markflag);	//weirdness is because the leading char of the version is important.
	}
	else
		return PM_FindExactPackage(t, arch, NULL, markflag);
}

//just resets all actions, so that a following apply won't do anything.
static void PM_RevertChanges(void)
{
	package_t *p;

	if (pkg_updating)
		return;

	for (p = availablepackages; p; p = p->next)
	{
		if (p->flags & DPF_ENGINE)
		{
			if (!(p->flags & DPF_HIDDEN) && !strcmp(enginerevision, p->version) && (p->flags & DPF_PRESENT))
				p->flags |= DPF_AUTOMARKED;
			else
				p->flags &= ~DPF_MARKED;
		}
		else
		{
			if (p->flags & DPF_ENABLED)
				p->flags |= DPF_USERMARKED;
			else
				p->flags &= ~DPF_MARKED;
		}
		p->flags &= ~DPF_PURGE;
	}
}

static qboolean PM_HasDependant(package_t *package, unsigned int markflag)
{
	package_t *o;
	struct packagedep_s *dep;
	for (o = availablepackages; o; o = o->next)
	{
		if (o->flags & markflag)
			for (dep = o->deps; dep; dep = dep->next)
				if (dep->dtype == DEP_REQUIRE || dep->dtype == DEP_RECOMMEND || dep->dtype == DEP_SUGGEST)
					if (!strcmp(package->name, dep->name))
						return true;
	}
	return false;
}

//just flags, doesn't delete (yet)
//markflag should be DPF_AUTOMARKED or DPF_USERMARKED
static void PM_UnmarkPackage(package_t *package, unsigned int markflag)
{
	package_t *o;
	struct packagedep_s *dep;

	if (pkg_updating)
		return;

	if (!(package->flags & markflag))
		return;	//looks like its already deselected.
	package->flags &= ~(markflag);

	if (!(package->flags & DPF_MARKED))
	{
#ifdef WEBCLIENT
		//Is this safe?
		package->trymirrors = 0;	//if its enqueued, cancel that quickly...
		if (package->download)
		{					//if its currently downloading, cancel it.
			DL_Close(package->download);
			package->download = NULL;
		}
#endif

		//remove stuff that depends on us
		for (o = availablepackages; o; o = o->next)
		{
			for (dep = o->deps; dep; dep = dep->next)
				if (dep->dtype == DEP_REQUIRE)
					if (!strcmp(dep->name, package->name))
						PM_UnmarkPackage(o, DPF_MARKED);
		}
	}
	if (!(package->flags & DPF_USERMARKED))
	{
		//go through dependancies and unmark any automarked packages if nothing else depends upon them
		for (dep = package->deps; dep; dep = dep->next)
		{
			if (dep->dtype == DEP_REQUIRE || dep->dtype == DEP_RECOMMEND)
			{
				package_t *d = PM_MarkedPackage(dep->name, DPF_AUTOMARKED);
				if (d && !(d->flags & DPF_USERMARKED))
				{
					if (!PM_HasDependant(d, DPF_MARKED))
						PM_UnmarkPackage(d, DPF_AUTOMARKED);
				}
			}
		}
	}
}

//just flags, doesn't install
//returns true if it was marked (or already enabled etc), false if we're not allowed.
static qboolean PM_MarkPackage(package_t *package, unsigned int markflag)
{
	package_t *o;
	struct packagedep_s *dep, *dep2;
	qboolean replacing = false;

	if (pkg_updating)
		return false;

	if (package->flags & DPF_MARKED)
	{
		package->flags |= markflag;
		return true;	//looks like its already picked. marking it again will do no harm.
	}

#ifndef WEBCLIENT
	//can't mark for download if we cannot download.
	if (!(package->flags & DPF_PRESENT))
	{	//though we can at least unmark it for deletion...
		package->flags &= ~DPF_PURGE;
		return false;
	}
#else
	if (!PM_SignatureOkay(package))
		return false;
#endif

	//any file-conflicts prevent the package from being installable.
	//this is mostly for pak1.pak
	for (dep = package->deps; dep; dep = dep->next)
	{
		if (dep->dtype == DEP_FILECONFLICT)
		{
			const char *n;
			if (*package->gamedir)
				n = va("%s/%s", package->gamedir, dep->name);
			else
				n = dep->name;
			if (PM_CheckFile(n, package->fsroot))
				return false;
		}
	}

	package->flags |= markflag;

	//first check to see if we're replacing a different version of the same package
	for (o = availablepackages; o; o = o->next)
	{
		if (o == package)
			continue;

		if (o->flags & DPF_MARKED)
		{
			if (!strcmp(o->name, package->name))
			{	//replaces this package
				o->flags &= ~DPF_MARKED;
				replacing = true;
			}
			else if ((package->flags & DPF_ENGINE) && (o->flags & DPF_ENGINE))
				PM_UnmarkPackage(o, DPF_MARKED);	//engine updates are mutually exclusive, unmark the existing one (you might have old ones cached, but they shouldn't be enabled).
			else
			{	//two packages with the same filename are always mutually incompatible, but with totally separate dependancies etc.
				qboolean remove = false;
				for (dep = package->deps; dep; dep = dep->next)
				{
					if (dep->dtype == DEP_FILE)
					for (dep2 = o->deps; dep2; dep2 = dep2->next)
					{
						if (dep2->dtype == DEP_FILE)
						if (!strcmp(dep->name, dep2->name))
						{
							PM_UnmarkPackage(o, DPF_MARKED);
							remove = true;
							break;
						}
					}
					if (remove)
						break;
				}
				//fixme: zip content conflicts
			}
		}
	}

	//if we are replacing an existing one, then dependancies are already settled (only because we don't do version deps)
	if (replacing)
		return true;

	//satisfy our dependancies.
	for (dep = package->deps; dep; dep = dep->next)
	{
		if (dep->dtype == DEP_REQUIRE || dep->dtype == DEP_RECOMMEND)
		{
			package_t *d = PM_MarkedPackage(dep->name, DPF_MARKED);
			if (!d)
			{
				d = PM_FindPackage(dep->name);
				if (d)
				{
					if (dep->dtype == DEP_RECOMMEND && !PM_CheckPackageFeatures(d))
						Con_DPrintf("Skipping recommendation \"%s\"\n", dep->name);
					else
						PM_MarkPackage(d, DPF_AUTOMARKED);
				}
				else
					Con_DPrintf("Couldn't find dependancy \"%s\"\n", dep->name);
			}
		}
		if (dep->dtype == DEP_CONFLICT || dep->dtype == DEP_REPLACE)
		{
			for (;;)
			{
				package_t *d = PM_MarkedPackage(dep->name, DPF_MARKED);
				if (!d)
					break;
				PM_UnmarkPackage(d, DPF_MARKED);
			}
		}
	}

	//remove any packages that conflict with us.
	for (o = availablepackages; o; o = o->next)
	{
		for (dep = o->deps; dep; dep = dep->next)
			if (dep->dtype == DEP_CONFLICT || dep->dtype == DEP_REPLACE)
				if (!strcmp(dep->name, package->name))
					PM_UnmarkPackage(o, DPF_MARKED);
	}
	return true;
}

static qboolean PM_NameIsInStrings(const char *strings, const char *match)
{
	char tok[1024];
	while (strings && *strings)
	{
		strings = COM_ParseStringSetSep(strings, ';', tok, sizeof(tok));
		if (!Q_strcasecmp(tok, match))	//okay its here.
			return true;
	}
	return false;
}

//just flag stuff as needing updating
unsigned int PM_MarkUpdates (void)
{
	unsigned int changecount = 0;
	package_t *p, *o, *b, *e = NULL;

	if (manifestpackages)
	{
		char tok[1024];
		char *strings = manifestpackages;
		while (strings && *strings)
		{
			strings = COM_ParseStringSetSep(strings, ';', tok, sizeof(tok));
			if (PM_NameIsInStrings(declinedpackages, tok))
				continue;

			p = PM_MarkedPackage(tok, DPF_MARKED);
			if (!p)
			{
				p = PM_FindPackage(tok);
				if (p)
				{
					if (PM_MarkPackage(p, DPF_AUTOMARKED))
						changecount++;
				}
			}
			else if (!(p->flags & DPF_ENABLED))
				changecount++;
		}
	}

	for (p = availablepackages; p; p = p->next)
	{
		if ((p->flags & DPF_ENGINE) && !(p->flags & DPF_HIDDEN))
		{
			if (!(p->flags & DPF_TESTING) || pkg_autoupdate.ival >= UPD_TESTING)
				if (!e || strcmp(e->version, p->version) < 0)	//package must be more recent than the previously found engine
					if (strcmp(enginerevision, "-") && strcmp(enginerevision, p->version) < 0)	//package must be more recent than the current engine too, there's no point auto-updating to an older revision.
						e = p;
		}
		if (p->flags & DPF_MARKED)
		{
			b = NULL;
			for (o = availablepackages; o; o = o->next)
			{
				if (p == o || (o->flags & DPF_HIDDEN))
					continue;
				if (!(o->flags & DPF_TESTING) || pkg_autoupdate.ival >= UPD_TESTING)
					if (!strcmp(o->name, p->name) && !strcmp(o->arch?o->arch:"", p->arch?p->arch:"") && strcmp(o->version, p->version) > 0)
					{
						if (!b || strcmp(b->version, o->version) < 0)
							b = o;
					}
			}

			if (b)
			{
				if (PM_MarkPackage(b, p->flags&DPF_MARKED))
				{
					changecount++;
					PM_UnmarkPackage(p, DPF_MARKED);
				}
			}
		}
	}
	if (e && !(e->flags & DPF_MARKED))
	{
		if (pkg_autoupdate.ival >= UPD_STABLE)
		{
			if (PM_MarkPackage(e, DPF_AUTOMARKED))
				changecount++;
		}
	}

	return changecount;
}

#if defined(M_Menu_Prompt) || defined(SERVERONLY)
#else
static unsigned int PM_ChangeList(char *out, size_t outsize)
{
	unsigned int changes = 0;
	const char *change;
	package_t *p;
	size_t l;
	size_t ofs = 0;
	if (!outsize)
		out = NULL;
	else
		*out = 0;
	for (p = availablepackages; p; p=p->next)
	{
		if (!(p->flags & DPF_MARKED) != !(p->flags & DPF_ENABLED) || (p->flags & DPF_PURGE))
		{
			changes++;
			if (!out)
				continue;

			if (p->flags & DPF_MARKED)
			{
				if (p->flags & DPF_PURGE)
					change = va(" reinstall %s\n", p->name);
				else if (p->flags & DPF_PRESENT)
					change = va(" enable %s\n", p->name);
				else
					change = va(" install %s\n", p->name);
			}
			else if ((p->flags & DPF_PURGE) || !(p->qhash && (p->flags & DPF_PRESENT)))
				change = va(" uninstall %s\n", p->name);
			else
				change = va(" disable %s\n", p->name);

			l = strlen(change);
			if (ofs+l >= outsize)
			{
				Q_strncpyz(out, "Too many changes\n", outsize);
				out = NULL;

				break;
			}
			else
			{
				memcpy(out+ofs, change, l);
				ofs += l;
				out[ofs] = 0;
			}
		}
	}
	return changes;
}
#endif

static void PM_PrintChanges(void)
{
	qboolean changes = 0;
	package_t *p;
	for (p = availablepackages; p; p=p->next)
	{
		if (!(p->flags & DPF_MARKED) != !(p->flags & DPF_ENABLED) || (p->flags & DPF_PURGE))
		{
			changes++;
			if (p->flags & DPF_MARKED)
			{
				if (p->flags & DPF_PURGE)
					Con_Printf(" reinstall %s\n", p->name);
				else
					Con_Printf(" install %s\n", p->name);
			}
			else if ((p->flags & DPF_PURGE) || !(p->qhash && (p->flags & DPF_CACHED)))
				Con_Printf(" uninstall %s\n", p->name);
			else
				Con_Printf(" disable %s\n", p->name);
		}
	}
	if (!changes)
		Con_Printf("<no changes>\n");
	else
		Con_Printf("<%i package(s) changed>\n", changes);
}

#ifdef WEBCLIENT
static void PM_ListDownloaded(struct dl_download *dl)
{
	size_t listidx = dl->user_num;
	size_t sz = 0;
	char *f = NULL;
	if (dl->file && dl->status != DL_FAILED)
	{
		sz = VFS_GETLEN(dl->file);
		f = BZ_Malloc(sz+1);
		if (f)
		{
			f[sz] = 0;
			if (sz != VFS_READ(dl->file, f, sz))
			{	//err... weird...
				BZ_Free(f);
				f = NULL;
			}
			if (strlen(f) != sz)
			{	//don't allow mid-file nulls.
				BZ_Free(f);
				f = NULL;
			}
		}
	}

	if (dl != pm_source[listidx].curdl)
	{
		//this request looks stale.
		BZ_Free(f);
		return;
	}
	pm_source[listidx].curdl = NULL;

	//FIXME: validate a signature!

	if (f)
	{
		pm_source[listidx].status = SRCSTAT_OBTAINED;
		PM_ParsePackageList(f, 0, dl->url, pm_source[listidx].prefix);
	}
	else if (dl->replycode == HTTP_DNSFAILURE)
		pm_source[listidx].status = SRCSTAT_FAILED_DNS;
	else if (dl->replycode == HTTP_NORESPONSE)
		pm_source[listidx].status = SRCSTAT_FAILED_NORESP;
	else if (dl->replycode == HTTP_REFUSED)
		pm_source[listidx].status = SRCSTAT_FAILED_REFUSED;
	else if (dl->replycode == HTTP_EOF)
		pm_source[listidx].status = SRCSTAT_FAILED_EOF;
	else if (dl->replycode == HTTP_MITM || dl->replycode == HTTP_UNTRUSTED)
		pm_source[listidx].status = SRCSTAT_FAILED_MITM;
	else if (dl->replycode && dl->replycode < 900)
		pm_source[listidx].status = SRCSTAT_FAILED_HTTP;
	else
		pm_source[listidx].status = SRCSTAT_FAILED_EOF;
	BZ_Free(f);

	if (!doautoupdate && !domanifestinstall)
		return;	//don't spam this.

	//check if we're still waiting
	for (listidx = 0; listidx < pm_numsources; listidx++)
	{
		if (pm_source[listidx].status == SRCSTAT_PENDING)
			break;
	}
/*
	if (domanifestinstall == MANIFEST_SECURITY_INSTALLER && manifestpackages)
	{
		package_t *meta;
		meta = PM_MarkedPackage(manifestpackages);
		if (!meta)
		{
			meta = PM_FindPackage(manifestpackages);
			if (meta)
			{
				PM_RevertChanges();
				PM_MarkPackage(meta);
				PM_ApplyChanges();

#ifdef DOWNLOADMENU
				if (!isDedicated)
				{
					if (Key_Dest_Has(kdm_emenu))
					{
						Key_Dest_Remove(kdm_emenu);
					}
#ifdef MENU_DAT
					if (Key_Dest_Has(kdm_gmenu))
						MP_Toggle(0);
#endif
					Cmd_ExecuteString("menu_download\n", RESTRICT_LOCAL);
				
				}
#endif
				return;
			}
		}
	}
*/

	//if our downloads finished and we want to shove it in the user's face then do so now.
	if ((doautoupdate || domanifestinstall == MANIFEST_SECURITY_DEFAULT) && listidx == pm_numsources)
	{
		if (PM_MarkUpdates())
		{
#ifdef DOWNLOADMENU
			if (!isDedicated)
			{
				Menu_PopAll();
				Cmd_ExecuteString("menu_download\n", RESTRICT_LOCAL);
			}
			else
#endif
				PM_PrintChanges();
		}
	}
}
#endif
#if defined(HAVE_CLIENT) && defined(WEBCLIENT)
static void PM_UpdatePackageList(qboolean autoupdate, int retry);
static void PM_AllowPackageListQuery_Callback(void *ctx, promptbutton_t opt)
{
	unsigned int i;
	//something changed, let it download now.
	if (opt!=PROMPT_CANCEL)
	{
		allowphonehome = (opt==PROMPT_YES);

		for (i = 0; i < pm_numsources; i++)
		{
			if (pm_source[i].flags & SRCFL_MANIFEST)
				pm_source[i].flags |= SRCFL_ONCE;
		}
	}
	PM_UpdatePackageList(false, 0);
}
#endif
//retry 1==
static void PM_UpdatePackageList(qboolean autoupdate, int retry)
{
	unsigned int i;

	if (retry>1)
		PM_Shutdown(true);

	PM_PreparePackageList();

#ifndef WEBCLIENT
	for (i = 0; i < pm_numsources; i++)
	{
		if (pm_source[i].status == SRCSTAT_PENDING)
			pm_source[i].status = SRCSTAT_FAILED_DNS;
	}
#else
	doautoupdate |= autoupdate;

	#ifdef HAVE_CLIENT
		if (pkg_autoupdate.ival >= 1)
			allowphonehome = true;
		else if (allowphonehome == -1)
		{
			if (retry)
				Menu_Prompt(PM_AllowPackageListQuery_Callback, NULL, "Query updates list?\n", "Okay", NULL, "Nope");
			return;
		}
	#else
		allowphonehome = true; //erk.
	#endif
	if (COM_CheckParm("-noupdate") || COM_CheckParm("-noupdates"))
		allowphonehome = false;

	//kick off the initial tier of list-downloads.
	for (i = 0; i < pm_numsources; i++)
	{
		if (pm_source[i].flags & SRCFL_HISTORIC)
			continue;
		if (!(pm_source[i].flags & (SRCFL_ENABLED|SRCFL_ONCE)))
			continue;	//is not explicitly enabled. might be pending for user confirmation.
		autoupdate = false;
		if (pm_source[i].curdl)
			continue;

		if (allowphonehome<=0)
		{
			pm_source[i].status = SRCSTAT_UNTRIED;
			continue;
		}
		if (pm_source[i].status == SRCSTAT_OBTAINED)
			return;	//already successful once. no need to do it again.
		pm_source[i].flags &= ~SRCFL_ONCE;
		pm_source[i].curdl = HTTP_CL_Get(va("%s%s"DOWNLOADABLESARGS, pm_source[i].url, strchr(pm_source[i].url,'?')?"&":"?"), NULL, PM_ListDownloaded);
		if (pm_source[i].curdl)
		{
			pm_source[i].curdl->user_num = i;

			pm_source[i].curdl->file = VFSPIPE_Open(1, false);
			pm_source[i].curdl->isquery = true;
			DL_CreateThread(pm_source[i].curdl, NULL, NULL);
		}
		else
		{
			Con_Printf("Could not contact updates server - %s\n", pm_source[i].url);
			pm_source[i].status = SRCSTAT_FAILED_DNS;
		}
	}

	if (autoupdate)
	{
		doautoupdate = 0;
		if (PM_MarkUpdates())
		{
#ifdef DOWNLOADMENU
			if (!isDedicated)
				Cbuf_AddText("menu_download\n", RESTRICT_LOCAL);
			else
#endif
				PM_PrintChanges();
		}
	}
#endif
}



static void COM_QuotedConcat(const char *cat, char *buf, size_t bufsize)
{
	const unsigned char *gah;
	for (gah = (const unsigned char*)cat; *gah; gah++)
	{
		if (*gah <= ' ' || *gah == '$' || *gah == '\"' || *gah == '\n' || *gah == '\r')
			break;
	}
	if (*gah || *cat == '\\' ||
		strstr(cat, "//") || strstr(cat, "/*"))
	{	//contains some dodgy stuff.
		size_t curlen = strlen(buf);
		buf += curlen;
		bufsize -= curlen;
		COM_QuotedString(cat, buf, bufsize, false);
	}
	else
	{	//okay, no need for quotes.
		Q_strncatz(buf, cat, bufsize);
	}
}
static void COM_QuotedKeyVal(const char *key, const char *val, char *buf, size_t bufsize)
{
	size_t curlen;

	Q_strncatz(buf, "\t\"", bufsize);

	curlen = strlen(buf);
	buf += curlen;
	bufsize -= curlen;
	COM_QuotedString(key, buf, bufsize, true);

	if (strlen(key) <= 5)
		Q_strncatz(buf, "\"\t\t\"", bufsize);
	else
		Q_strncatz(buf, "\"\t\"", bufsize);

	curlen = strlen(buf);
	buf += curlen;
	bufsize -= curlen;
	COM_QuotedString(val, buf, bufsize, true);

	Q_strncatz(buf, "\"\n", bufsize);
}
static void PM_WriteInstalledPackages(void)
{
	char buf[65536];
	int i;
	char *s;
	package_t *p;
	struct packagedep_s *dep;
	vfsfile_t *f = FS_OpenVFS(INSTALLEDFILES, "wb", FS_ROOT);
	qboolean v3 = false;
	if (!f)
	{
		Con_Printf("package manager: Can't update installed list\n");
		return;
	}

	if (v3)
		s = "version 3\n";
	else
		s = "version 2\n";
	VFS_WRITE(f, s, strlen(s));

	s = va("set updatemode %s\n", COM_QuotedString(pkg_autoupdate.string, buf, sizeof(buf), false));
	VFS_WRITE(f, s, strlen(s));
	s = va("set declined %s\n", COM_QuotedString(declinedpackages?declinedpackages:"", buf, sizeof(buf), false));
	VFS_WRITE(f, s, strlen(s));

	for (i = 0; i < pm_numsources; i++)
	{
		char *status;
		if (!(pm_source[i].flags & (SRCFL_DISABLED|SRCFL_ENABLED)))
			continue;	//don't bother saving sources which the user has neither confirmed nor denied.

		if (pm_source[i].flags & SRCFL_ENABLED)
			status = "enabled";	//anything else is enabled
		else
			status = "disabled";

		if (pm_source[i].flags & SRCFL_USER)	//make sure it works.
			s = va("sublist \"%s\" \"%s\" \"%s\"\n", pm_source[i].url, pm_source[i].prefix, status);
		else	//will be 'historic' when loaded
			s = va("source \"%s\" \"%s\"\n", pm_source[i].url, status);
		VFS_WRITE(f, s, strlen(s));
	}

	for (p = availablepackages; p ; p=p->next)
	{
		if (p->flags & (DPF_PRESENT|DPF_ENABLED))
		{
			buf[0] = 0;
			if (v3)
			{
				buf[0] = '{';
				buf[1] = '\n';
				buf[2] = 0;
				COM_QuotedKeyVal("package", p->name, buf, sizeof(buf));
				COM_QuotedKeyVal("category", p->category, buf, sizeof(buf));
				if (p->flags & DPF_ENABLED)
					COM_QuotedKeyVal("enabled", "1", buf, sizeof(buf));
				if (p->flags & DPF_GUESSED)
					COM_QuotedKeyVal("guessed", "1", buf, sizeof(buf));
				if (*p->title && strcmp(p->title, p->name))
					COM_QuotedKeyVal("title", p->title, buf, sizeof(buf));
				if (*p->version)
					COM_QuotedKeyVal("ver", p->version, buf, sizeof(buf));
				//if (*p->gamedir)
					COM_QuotedKeyVal("gamedir", p->gamedir, buf, sizeof(buf));
				if (p->qhash)
					COM_QuotedKeyVal("qhash", p->qhash, buf, sizeof(buf));
				if (p->priority!=PM_DEFAULTPRIORITY)
					COM_QuotedKeyVal("priority", va("%i", p->priority), buf, sizeof(buf));
				if (p->arch)
					COM_QuotedKeyVal("arch", p->arch, buf, sizeof(buf));

				if (p->license)
					COM_QuotedKeyVal("license", p->license, buf, sizeof(buf));
				if (p->website)
					COM_QuotedKeyVal("website", p->website, buf, sizeof(buf));
				if (p->author)
					COM_QuotedKeyVal("author", p->author, buf, sizeof(buf));
				if (p->description)
					COM_QuotedKeyVal("desc", p->description, buf, sizeof(buf));
				if (p->previewimage)
					COM_QuotedKeyVal("preview", p->previewimage, buf, sizeof(buf));
				if (p->filesize)
					COM_QuotedKeyVal("filesize", va("%"PRIu64, p->filesize), buf, sizeof(buf));

				if (p->fsroot == FS_BINARYPATH)
					COM_QuotedKeyVal("root", "bin", buf, sizeof(buf));

				for (dep = p->deps; dep; dep = dep->next)
				{
					if (dep->dtype == DEP_FILE)
						COM_QuotedKeyVal("file", dep->name, buf, sizeof(buf));
					else if (dep->dtype == DEP_REQUIRE)
						COM_QuotedKeyVal("depend", dep->name, buf, sizeof(buf));
					else if (dep->dtype == DEP_CONFLICT)
						COM_QuotedKeyVal("conflict", dep->name, buf, sizeof(buf));
					else if (dep->dtype == DEP_REPLACE)
						COM_QuotedKeyVal("replace", dep->name, buf, sizeof(buf));
					else if (dep->dtype == DEP_FILECONFLICT)
						COM_QuotedKeyVal("fileconflict", dep->name, buf, sizeof(buf));
					else if (dep->dtype == DEP_RECOMMEND)
						COM_QuotedKeyVal("recommend", dep->name, buf, sizeof(buf));
					else if (dep->dtype == DEP_NEEDFEATURE)
						COM_QuotedKeyVal("need", dep->name, buf, sizeof(buf));
				}

				if (p->flags & DPF_TESTING)
					COM_QuotedKeyVal("test", "1", buf, sizeof(buf));

				if ((p->flags & DPF_AUTOMARKED) && !(p->flags & DPF_USERMARKED))
					COM_QuotedKeyVal("auto", "1", buf, sizeof(buf));

				Q_strncatz(buf, "}", sizeof(buf));
			}
			else
			{
				COM_QuotedString(va("%s%s", p->category, p->name), buf, sizeof(buf), false);
				if (p->flags & DPF_ENABLED)
				{	//v3+
	//				Q_strncatz(buf, " ", sizeof(buf));
	//				COM_QuotedConcat(va("enabled=1"), buf, sizeof(buf));
				}
				else
				{	//v2
					Q_strncatz(buf, " ", sizeof(buf));
					COM_QuotedConcat(va("stale=1"), buf, sizeof(buf));
				}
				if (p->flags & DPF_GUESSED)
				{
					Q_strncatz(buf, " ", sizeof(buf));
					COM_QuotedConcat(va("guessed=1"), buf, sizeof(buf));
				}
				if (*p->title && strcmp(p->title, p->name))
				{
					Q_strncatz(buf, " ", sizeof(buf));
					COM_QuotedConcat(va("title=%s", p->title), buf, sizeof(buf));
				}
				if (*p->version)
				{
					Q_strncatz(buf, " ", sizeof(buf));
					COM_QuotedConcat(va("ver=%s", p->version), buf, sizeof(buf));
				}
				//if (*p->gamedir)
				{
					Q_strncatz(buf, " ", sizeof(buf));
					COM_QuotedConcat(va("gamedir=%s", p->gamedir), buf, sizeof(buf));
				}
				if (p->qhash)
				{
					Q_strncatz(buf, " ", sizeof(buf));
					COM_QuotedConcat(va("qhash=%s", p->qhash), buf, sizeof(buf));
				}
				if (p->priority!=PM_DEFAULTPRIORITY)
				{
					Q_strncatz(buf, " ", sizeof(buf));
					COM_QuotedConcat(va("priority=%i", p->priority), buf, sizeof(buf));
				}
				if (p->arch)
				{
					Q_strncatz(buf, " ", sizeof(buf));
					COM_QuotedConcat(va("arch=%s", p->arch), buf, sizeof(buf));
				}

				if (p->license)
				{
					Q_strncatz(buf, " ", sizeof(buf));
					COM_QuotedConcat(va("license=%s", p->license), buf, sizeof(buf));
				}
				if (p->website)
				{
					Q_strncatz(buf, " ", sizeof(buf));
					COM_QuotedConcat(va("website=%s", p->website), buf, sizeof(buf));
				}
				if (p->author)
				{
					Q_strncatz(buf, " ", sizeof(buf));
					COM_QuotedConcat(va("author=%s", p->author), buf, sizeof(buf));
				}
				if (p->description)
				{
					Q_strncatz(buf, " ", sizeof(buf));
					COM_QuotedConcat(va("desc=%s", p->description), buf, sizeof(buf));
				}
				if (p->previewimage)
				{
					Q_strncatz(buf, " ", sizeof(buf));
					COM_QuotedConcat(va("preview=%s", p->previewimage), buf, sizeof(buf));
				}
				if (p->filesize)
				{
					Q_strncatz(buf, " ", sizeof(buf));
					COM_QuotedConcat(va("filesize=%"PRIu64, p->filesize), buf, sizeof(buf));
				}

				if (p->fsroot == FS_BINARYPATH)
				{
					Q_strncatz(buf, " ", sizeof(buf));
					COM_QuotedConcat("root=bin", buf, sizeof(buf));
				}

				for (dep = p->deps; dep; dep = dep->next)
				{
					if (dep->dtype == DEP_FILE)
					{
						Q_strncatz(buf, " ", sizeof(buf));
						COM_QuotedConcat(va("file=%s", dep->name), buf, sizeof(buf));
					}
					else if (dep->dtype == DEP_REQUIRE)
					{
						Q_strncatz(buf, " ", sizeof(buf));
						COM_QuotedConcat(va("depend=%s", dep->name), buf, sizeof(buf));
					}
					else if (dep->dtype == DEP_CONFLICT)
					{
						Q_strncatz(buf, " ", sizeof(buf));
						COM_QuotedConcat(va("conflict=%s", dep->name), buf, sizeof(buf));
					}
					else if (dep->dtype == DEP_REPLACE)
					{
						Q_strncatz(buf, " ", sizeof(buf));
						COM_QuotedConcat(va("replace=%s", dep->name), buf, sizeof(buf));
					}
					else if (dep->dtype == DEP_FILECONFLICT)
					{
						Q_strncatz(buf, " ", sizeof(buf));
						COM_QuotedConcat(va("fileconflict=%s", dep->name), buf, sizeof(buf));
					}
					else if (dep->dtype == DEP_RECOMMEND)
					{
						Q_strncatz(buf, " ", sizeof(buf));
						COM_QuotedConcat(va("recommend=%s", dep->name), buf, sizeof(buf));
					}
					else if (dep->dtype == DEP_NEEDFEATURE)
					{
						Q_strncatz(buf, " ", sizeof(buf));
						COM_QuotedConcat(va("need=%s", dep->name), buf, sizeof(buf));
					}
				}

				if (p->flags & DPF_TESTING)
				{
					Q_strncatz(buf, " ", sizeof(buf));
					COM_QuotedConcat("test=1", buf, sizeof(buf));
				}

				if ((p->flags & DPF_AUTOMARKED) && !(p->flags & DPF_USERMARKED))
				{
					Q_strncatz(buf, " ", sizeof(buf));
					COM_QuotedConcat("auto", buf, sizeof(buf));
				}
			}

			buf[sizeof(buf)-2] = 0;	//just in case.
			Q_strncatz(buf, "\n", sizeof(buf));
			VFS_WRITE(f, buf, strlen(buf));
		}
	}

	VFS_CLOSE(f);
}

//package has been downloaded and installed, but some packages need to be enabled
//(plugins might have other dll dependancies, so this can only happen AFTER the entire package was extracted)
static void PM_PackageEnabled(package_t *p)
{
	char ext[8];
	struct packagedep_s *dep;
#ifdef HAVEAUTOUPDATE
	struct packagedep_s *ef = NULL;
#endif
	FS_FlushFSHashFull();
	for (dep = p->deps; dep; dep = dep->next)
	{
		if (dep->dtype != DEP_FILE)
			continue;
		COM_FileExtension(dep->name, ext, sizeof(ext));
		if (!stricmp(ext, "pak") || !stricmp(ext, "pk3"))
		{
			if (pm_packagesinstalled)
			{
				pm_packagesinstalled = false;
				FS_ChangeGame(fs_manifest, true, false);
			}
			else
				FS_ReloadPackFiles();
		}
#ifdef PLUGINS
		if ((p->flags & DPF_PLUGIN) && !Q_strncasecmp(dep->name, PLUGINPREFIX, strlen(PLUGINPREFIX)))
			Cmd_ExecuteString(va("plug_load %s\n", dep->name), RESTRICT_LOCAL);
#endif
#ifdef MENU_DAT
		if (!Q_strcasecmp(dep->name, "menu.dat"))
			Cmd_ExecuteString("menu_restart\n", RESTRICT_LOCAL);
#endif
#ifdef HAVEAUTOUPDATE
		if (p->flags & DPF_ENGINE)
			ef = dep;
#endif
	}

#ifdef HAVEAUTOUPDATE
	//this is an engine update (with installed file) and marked.
	if (ef && (p->flags & DPF_MARKED))
	{
		char native[MAX_OSPATH];
		package_t *othr;
		//make sure there's no more recent build that's also enabled...
		for (othr = availablepackages; othr ; othr=othr->next)
		{
			if ((othr->flags & DPF_ENGINE) && (othr->flags & DPF_MARKED) && othr->flags & (DPF_PRESENT|DPF_ENABLED) && othr != p)
				if (strcmp(p->version, othr->version) >= 0)
					return;
		}

#ifndef HAVE_CLIENT
#define Menu_Prompt(cb,ctx,msg,yes,no,cancel) Con_Printf(CON_WARNING msg "\n")
#endif

		if (FS_NativePath(ef->name, p->fsroot, native, sizeof(native)) && Sys_SetUpdatedBinary(native))
		{
			Q_strncpyz(enginerevision, p->version, sizeof(enginerevision));	//make sure 'revert' picks up the new binary...
			Menu_Prompt(NULL, NULL, "Engine binary updated.\nRestart to use.", NULL, NULL, NULL);
		}
		else
			Menu_Prompt(NULL, NULL, "Engine update failed.\nManual update required.", NULL, NULL, NULL);
	}
#endif
}

#ifdef WEBCLIENT
//callback from PM_Download_Got, extracts each file from an archive
static int QDECL PM_ExtractFiles(const char *fname, qofs_t fsize, time_t mtime, void *parm, searchpathfuncs_t *spath)
{	//this is gonna suck. threading would help, but gah.
	package_t *p = parm;
	flocation_t loc;
	if (fname[strlen(fname)-1] == '/')
	{	//directory.

	}
	else if (spath->FindFile(spath, &loc, fname, NULL) && loc.len < 0x80000000u)
	{
		char *f = malloc(loc.len);
		const char *n;
		if (f)
		{
			spath->ReadFile(spath, &loc, f);
			if (*p->gamedir)
				n = va("%s/%s", p->gamedir, fname);
			else
				n = fname;
			if (FS_WriteFile(n, f, loc.len, p->fsroot))
				p->flags |= DPF_NATIVE|DPF_ENABLED;

			//keep track of the installed files, so we can delete them properly after.
			PM_AddDep(p, DEP_FILE, fname);
		}
		free(f);
	}
	return 1;
}

static void PM_StartADownload(void);
typedef struct
{
	package_t *p;
	qboolean successful;
	char *tempname;	//z_strduped string, so needs freeing.
	enum fs_relative temproot;
	char localname[256];
	char url[256];
} pmdownloadedinfo_t;
//callback from PM_StartADownload
static void PM_Download_Got(int iarg, void *data)
{
	pmdownloadedinfo_t *info = data;
	char native[MAX_OSPATH];
	qboolean successful = info->successful;
	package_t *p;
	char *tempname = info->tempname;
	const enum fs_relative temproot = info->temproot;

	for (p = availablepackages; p ; p=p->next)
	{
		if (p == info->p)
			break;
	}
	pm_packagesinstalled=true;

	if (p)
	{
		char ext[8];
		char *destname;
		struct packagedep_s *dep, *srcname = p->deps;
		p->download = NULL;

		if (!successful)
		{
			Con_Printf("Couldn't download %s (from %s)\n", p->name, info->url);
			FS_Remove (tempname, temproot);
			Z_Free(tempname);
			PM_StartADownload();
			return;
		}

		if (p->extract == EXTRACT_ZIP)
		{
			searchpathfuncs_t *archive = NULL;
#ifdef PACKAGE_PK3
			vfsfile_t *f = FS_OpenVFS(tempname, "rb", temproot);
			if (f)
			{
				archive = FSZIP_LoadArchive(f, NULL, tempname, tempname, NULL);
				if (!archive)
					VFS_CLOSE(f);
			}
#else
			Con_Printf("zip format not supported in this build - %s (from %s)\n", p->name, dl->url);
#endif
			if (archive)
			{
				p->flags &= ~(DPF_NATIVE|DPF_CACHED|DPF_CORRUPT|DPF_ENABLED);
				archive->EnumerateFiles(archive, "*", PM_ExtractFiles, p);
				archive->EnumerateFiles(archive, "*/*", PM_ExtractFiles, p);
				archive->EnumerateFiles(archive, "*/*/*", PM_ExtractFiles, p);
				archive->EnumerateFiles(archive, "*/*/*/*", PM_ExtractFiles, p);
				archive->EnumerateFiles(archive, "*/*/*/*/*", PM_ExtractFiles, p);
				archive->EnumerateFiles(archive, "*/*/*/*/*/*", PM_ExtractFiles, p);
				archive->EnumerateFiles(archive, "*/*/*/*/*/*/*", PM_ExtractFiles, p);
				archive->EnumerateFiles(archive, "*/*/*/*/*/*/*/*", PM_ExtractFiles, p);
				archive->EnumerateFiles(archive, "*/*/*/*/*/*/*/*/*", PM_ExtractFiles, p);
				archive->ClosePath(archive);

				PM_WriteInstalledPackages();

//					if (!stricmp(ext, "pak") || !stricmp(ext, "pk3"))
//						FS_ReloadPackFiles();
			}
			PM_ValidatePackage(p);
			FS_Remove (tempname, temproot);
			Z_Free(tempname);
			p->trymirrors = 0;	//we're done... don't download it again!
			PM_StartADownload();
			return;
		}
		else
		{
			qboolean success = false;
			searchpathfuncs_t *archive = NULL;
#ifdef PACKAGE_PK3
			if (p->extract == EXTRACT_EXPLICITZIP)
			{
				vfsfile_t *f = FS_OpenVFS(tempname, "rb", temproot);
				if (f)
				{
					archive = FSZIP_LoadArchive(f, NULL, tempname, tempname, NULL);
					if (!archive)
						VFS_CLOSE(f);
				}
			}
#endif

			for (dep = p->deps; dep; dep = dep->next)
			{
				unsigned int nfl;
				if (dep->dtype != DEP_FILE)
					continue;

				COM_FileExtension(dep->name, ext, sizeof(ext));
				if (!stricmp(ext, "pak") || !stricmp(ext, "pk3"))
					FS_UnloadPackFiles();	//we reload them after
#ifdef PLUGINS
				if ((!stricmp(ext, "dll") || !stricmp(ext, "so")) && !Q_strncmp(dep->name, PLUGINPREFIX, strlen(PLUGINPREFIX)))
					Cmd_ExecuteString(va("plug_close %s\n", dep->name), RESTRICT_LOCAL);	//try to purge plugins so there's no files left open
#endif

				nfl = DPF_NATIVE;
				if (*p->gamedir)
				{
					char temp[MAX_OSPATH];
					destname = va("%s/%s", p->gamedir, dep->name);
					if (PM_TryGenCachedName(destname, p, temp, sizeof(temp)))
					{
						nfl = DPF_CACHED;
						destname = va("%s", temp);
					}
				}
				else
					destname = dep->name;
				if (p->flags & DPF_MARKED)
					nfl |= DPF_ENABLED;
				nfl |= (p->flags & ~(DPF_CACHED|DPF_NATIVE|DPF_CORRUPT));
				FS_CreatePath(destname, p->fsroot);
				if (FS_Remove(destname, p->fsroot))
					;
				if (p->extract == EXTRACT_EXPLICITZIP)
				{
					while (srcname && srcname->dtype != DEP_EXTRACTNAME)
						srcname = srcname->next;
					if (archive)
					{
						flocation_t loc;

						if (archive->FindFile(archive, &loc, srcname->name, NULL)==FF_FOUND && loc.len < 0x80000000u)
						{
							char *f = malloc(loc.len);
							if (f)
							{
								archive->ReadFile(archive, &loc, f);
								if (FS_WriteFile(destname, f, loc.len, p->fsroot))
								{
									p->flags = nfl;
									success = true;
									continue;
								}
							}
						}
					}

					if (!FS_NativePath(destname, p->fsroot, native, sizeof(native)))
						Q_strncpyz(native, destname, sizeof(native));
					Con_Printf("Couldn't extract %s/%s to %s. Removed instead.\n", tempname, dep->name, native);
					FS_Remove (tempname, temproot);
				}
				else if (!FS_Rename2(tempname, destname, temproot, p->fsroot))
				{
					//error!
					if (!FS_NativePath(destname, p->fsroot, native, sizeof(native)))
						Q_strncpyz(native, destname, sizeof(native));
					Con_Printf("Couldn't rename %s to %s. Removed instead.\n", tempname, native);
					FS_Remove (tempname, temproot);
				}
				else
				{	//success!
					if (!FS_NativePath(destname, p->fsroot, native, sizeof(native)))
						Q_strncpyz(native, destname, sizeof(native));
					Con_Printf("Downloaded %s (to %s)\n", p->name, native);

					p->flags = nfl;
				}

				success = true;
			}
			if (archive)
				archive->ClosePath(archive);
			if (p->extract == EXTRACT_EXPLICITZIP)
				FS_Remove (tempname, temproot);
			if (success)
			{
				PM_ValidatePackage(p);

				PM_PackageEnabled(p);
				PM_WriteInstalledPackages();

				Z_Free(tempname);

				p->trymirrors = 0;	//we're done with this one... don't download it from another mirror!
				PM_StartADownload();
				return;
			}
		}
		Con_Printf("menu_download: %s has no filename info\n", p->name);
	}
	else
		Con_Printf("menu_download: Can't figure out where %s came from (url: %s)\n", info->localname, info->url);

	FS_Remove (tempname, temproot);
	Z_Free(tempname);
	PM_StartADownload();
}
static void PM_Download_PreliminaryGot(struct dl_download *dl)
{	//this function is annoying.
	//we're on the mainthread, but we might still be waiting for some other thread to complete
	//there could be loads of stuff on the callstack. lots of stuff that could get annoyed if we're restarting the entire filesystem, for instance.
	//so set up a SECOND callback using a different mechanism...

	pmdownloadedinfo_t info;
	info.tempname = dl->user_ctx;
	info.temproot = dl->user_num;

	Q_strncpyz(info.url, dl->url, sizeof(info.url));
	Q_strncpyz(info.localname, dl->localname, sizeof(info.localname));

	for (info.p = availablepackages; info.p ; info.p=info.p->next)
	{
		if (info.p->download == dl)
			break;
	}

	info.successful = (dl->status == DL_FINISHED);
	if (dl->file)
	{
		if (!VFS_CLOSE(dl->file))
			info.successful = false;
		dl->file = NULL;
	}
	else
		info.successful = false;

	Cmd_AddTimer(0, PM_Download_Got, 0, &info, sizeof(info));
}

static char *PM_GetTempName(package_t *p)
{
	struct packagedep_s *dep, *fdep;
	char *destname, *t, *ts;
	//always favour the file so that we can rename safely without needing a copy.
	for (dep = p->deps, fdep = NULL; dep; dep = dep->next)
	{
		if (dep->dtype != DEP_FILE)
			continue;
		if (fdep)
		{
			fdep = NULL;
			break;
		}
		fdep = dep;
	}
	if (fdep)
	{
		if (*p->gamedir)
			destname = va("%s/%s.tmp", p->gamedir, fdep->name);
		else
			destname = va("%s.tmp", fdep->name);
		return Z_StrDup(destname);
	}
	ts = Z_StrDup(p->name);
	for (t = ts; *t; t++)
	{
		switch(*t)
		{
		case '/':
		case '?':
		case '<':
		case '>':
		case '\\':
		case ':':
		case '*':
		case '|':
		case '\"':
		case '.':
			*t = '_';
			break;
		default:
			break;
		}
	}
	if (*ts)
	{
		if (*p->gamedir)
			destname = va("%s/%s.tmp", p->gamedir, ts);
		else
			destname = va("%s.tmp", ts);
	}
	else
		destname = va("%x.tmp", (unsigned int)(quintptr_t)p);
	Z_Free(ts);
	return Z_StrDup(destname);
}


typedef struct {
	vfsfile_t pub;
	vfsfile_t *f;
	hashfunc_t *hashfunc;
	qofs_t sz;
	qofs_t needsize;
	qboolean fail;
	qbyte need[DIGEST_MAXSIZE];
	char *fname;
	qbyte ctx[1];
} hashfile_t;
static int QDECL SHA1File_WriteBytes (struct vfsfile_s *file, const void *buffer, int bytestowrite)
{
	hashfile_t *f = (hashfile_t*)file;
	f->hashfunc->process(&f->ctx, buffer, bytestowrite);
	if (bytestowrite != VFS_WRITE(f->f, buffer, bytestowrite))
		f->fail = true;	//something went wrong.
	if (f->fail)
		return -1;	//error! abort! fail! give up!
	f->sz += bytestowrite;
	return bytestowrite;
}
static void QDECL SHA1File_Flush (struct vfsfile_s *file)
{
	hashfile_t *f = (hashfile_t*)file;
	VFS_FLUSH(f->f);
}
static qboolean QDECL SHA1File_Close (struct vfsfile_s *file)
{
	qbyte digest[256];
	hashfile_t *f = (hashfile_t*)file;
	if (!VFS_CLOSE(f->f))
		f->fail = true;	//something went wrong.
	f->f = NULL;

	f->hashfunc->terminate(digest, &f->ctx);
	if (f->fail)
		Con_Printf("Filesystem problems downloading %s\n", f->fname);	//don't error if we failed on actual disk problems
	else if (f->sz != f->needsize)
	{
		Con_Printf("Download truncated: %s\n", f->fname);	//don't error if we failed on actual disk problems
		f->fail = true;
	}
	else if (memcmp(digest, f->need, f->hashfunc->digestsize))
	{
		Con_Printf("Invalid hash for downloaded file %s, try again later?\n", f->fname);
		f->fail = true;
	}

	return !f->fail;	//true if all okay!
}
static vfsfile_t *FS_Sha1_ValidateWrites(vfsfile_t *f, const char *fname, qofs_t needsize, hashfunc_t *hashfunc, const char *hash)
{	//wraps a writable file with a layer that'll cause failures when the hash differs from what we expect.
	if (f)
	{
		hashfile_t *n = Z_Malloc(sizeof(*n) + hashfunc->contextsize + strlen(fname));
		n->pub.WriteBytes = SHA1File_WriteBytes;
		n->pub.Flush = SHA1File_Flush;
		n->pub.Close = SHA1File_Close;
		n->pub.seekstyle = SS_UNSEEKABLE;
		n->f = f;
		n->hashfunc = hashfunc;
		n->fname = n->ctx+hashfunc->contextsize;
		strcpy(n->fname, fname);
		n->needsize = needsize;
		Base16_DecodeBlock(hash, n->need, sizeof(n->need));
		n->fail = false;

		n->hashfunc->init(&n->ctx);

		f = &n->pub;
	}
	return f;
}

//function that returns true if the package doesn't look exploity.
//so either its a versioned package, or its got a trusted signature.
static qboolean PM_SignatureOkay(package_t *p)
{
	struct packagedep_s *dep;
	char ext[MAX_QPATH];

//	if (p->flags & (DPF_SIGNATUREREJECTED|DPF_SIGNATUREUNKNOWN))	//the sign key didn't match its sha512 hash
//		return false;	//just block it entirely.
	if (p->flags & DPF_SIGNATUREACCEPTED)	//sign value is present and correct
		return true;	//go for it.
	if (p->flags & DPF_PRESENT)
		return true;	//we don't know where it came from, but someone manually installed it...

	//packages without a signature are only allowed under some limited conditions.
	//basically we only allow meta packages, pk3s, and paks.

	if (p->extract == EXTRACT_ZIP)
		return false;	//extracting files is bad (there might be some weird .pif or whatever file in there, don't risk it)
	for (dep = p->deps; dep; dep = dep->next)
	{
		if (dep->dtype != DEP_FILE)
			continue;

		COM_FileExtension(dep->name, ext, sizeof(ext));
		if ((!stricmp(ext, "pak") || !stricmp(ext, "pk3") || !stricmp(ext, "zip")) && (p->qhash || (p->flags&DPF_MANIFEST)))
			;
		else
			return false;
	}
	return true;
}
#endif

/*static void PM_AddDownloadedPackage(const char *filename)
{
	char pathname[1024];
	package_t *p;
	Q_snprintfz(pathname, sizeof(pathname), "%s/%s", "Cached", filename);
	p->name = Z_StrDup(COM_SkipPath(pathname));
	*COM_SkipPath(pathname) = 0;
	p->category = Z_StrDup(pathname);

	Q_strncpyz(p->version, "", sizeof(p->version));

	Q_snprintfz(p->gamedir, sizeof(p->gamedir), "%s", "");
	p->fsroot = FS_ROOT;
	p->extract = EXTRACT_COPY;
	p->priority = 0;
	p->flags = DPF_INSTALLED;

	p->title = Z_StrDup(p->name);
	p->arch = NULL;
	p->qhash = NULL; //FIXME
	p->description = NULL;
	p->license = NULL;
	p->author = NULL;
	p->previewimage = NULL;
}*/

int PM_IsApplying(qboolean listsonly)
{
	int count = 0;
#ifdef WEBCLIENT
	package_t *p;
//	int i;
	if (!listsonly)
	{
		for (p = availablepackages; p ; p=p->next)
		{
			if (p->download)
				count++;
		}
	}
#endif
	return count;
}

#ifdef WEBCLIENT
static void PM_DownloadsCompleted(int iarg, void *data)
{	//if something installed, then make sure everything is reconfigured properly.
	if (pm_packagesinstalled)
	{
		pm_packagesinstalled = false;
		FS_ChangeGame(fs_manifest, true, false);
	}
}


//looks for the next package that needs downloading, and grabs it
static void PM_StartADownload(void)
{
	vfsfile_t *tmpfile;
	char *temp;
	enum fs_relative temproot;
	package_t *p;
	const int simultaneous = PM_IsApplying(true)?1:2;
	int i;
	qboolean downloading = false;

	for (p = availablepackages; p && simultaneous > PM_IsApplying(false); p=p->next)
	{
		if (p->download)
			downloading = true;
		else if (p->trymirrors)
		{	//flagged for a (re?)download
			char *mirror = NULL;
			for (i = 0; i < countof(p->mirror); i++)
			{
				if (p->mirror[i] && (p->trymirrors & (1u<<i)))
				{
					mirror = p->mirror[i];
					p->trymirrors &= ~(1u<<i);
					break;
				}
			}
			if (!mirror)
			{	//erk...
				p->trymirrors = 0;

				for (i = 0; i < countof(p->mirror); i++)
					if (p->mirror[i])
						break;
				if (i == countof(p->mirror))
				{	//this appears to be a meta package with no download
					//just directly install it.
					//FIXME: make sure there's no files...
					p->flags &= ~(DPF_NATIVE|DPF_CACHED|DPF_CORRUPT);
					if (p->flags & DPF_MARKED)
						p->flags |= DPF_ENABLED;

					Con_Printf("Enabled meta package %s\n", p->name);
					PM_WriteInstalledPackages();
					PM_PackageEnabled(p);
				}
				continue;
			}

			if ((p->flags & DPF_PRESENT) && !PM_PurgeOnDisable(p))
			{	//its in our cache directory, so lets just use that
				p->trymirrors = 0;
				if (p->flags & DPF_MARKED)
					p->flags |= DPF_ENABLED;

				Con_Printf("Enabled cached package %s\n", p->name);
				PM_WriteInstalledPackages();
				PM_PackageEnabled(p);
				continue;
			}

			if (!PM_SignatureOkay(p) || (qofs_t)p->filesize != p->filesize)
			{
				p->flags &= ~DPF_MARKED;	//refusing to do it.
				continue;
			}

			temp = PM_GetTempName(p);
			temproot = p->fsroot;

			//FIXME: we should lock in the temp path, in case the user foolishly tries to change gamedirs.

			FS_CreatePath(temp, temproot);
			switch (p->extract)
			{
			case EXTRACT_ZIP:
			case EXTRACT_EXPLICITZIP:
			case EXTRACT_COPY:
				tmpfile = FS_OpenVFS(temp, "wb", temproot);
				break;
#ifdef AVAIL_XZDEC
			case EXTRACT_XZ:
				{
					vfsfile_t *raw = FS_OpenVFS(temp, "wb", temproot);
					tmpfile = raw?FS_XZ_DecompressWriteFilter(raw):NULL;
					if (!tmpfile && raw)
						VFS_CLOSE(raw);
				}
				break;
#endif
#ifdef AVAIL_GZDEC
			case EXTRACT_GZ:
				{
					vfsfile_t *raw = FS_OpenVFS(temp, "wb", temproot);
					tmpfile = raw?FS_GZ_WriteFilter(raw, true, false):NULL;
					if (!tmpfile && raw)
						VFS_CLOSE(raw);
				}
				break;
#endif
			default:
				Con_Printf("decompression method not supported\n");
				continue;
			}

			if (p->filesha512 && tmpfile)
				tmpfile = FS_Sha1_ValidateWrites(tmpfile, p->name, p->filesize, &hash_sha512, p->filesha512);
			else if (p->filesha1 && tmpfile)
				tmpfile = FS_Sha1_ValidateWrites(tmpfile, p->name, p->filesize, &hash_sha1, p->filesha1);

			if (tmpfile)
			{
				p->download = HTTP_CL_Get(mirror, NULL, PM_Download_PreliminaryGot);
				if (!p->download)
					Con_Printf("Unable to download %s\n", p->name);
			}
			else
			{
				char syspath[MAX_OSPATH];
				FS_NativePath(temp, temproot, syspath, sizeof(syspath));
				Con_Printf("Unable to write %s. Fix permissions before trying to download %s\n", syspath, p->name);
				p->trymirrors = 0;	//don't bother trying other mirrors if we can't write the file or understand its type.
			}
			if (p->download)
			{
				Con_Printf("Downloading %s\n", p->name);
				p->download->file = tmpfile;
				p->download->user_ctx = temp;
				p->download->user_num = temproot;

				DL_CreateThread(p->download, NULL, NULL);
				downloading = true;
			}
			else
			{
				p->flags &= ~DPF_MARKED;	//can't do it.
				if (tmpfile)
					VFS_CLOSE(tmpfile);
				FS_Remove(temp, temproot);
			}
		}
	}

	if (pkg_updating && !downloading)
		Cmd_AddTimer(0, PM_DownloadsCompleted, 0, NULL, 0);

	//clear the updating flag once there's no more activity needed
	pkg_updating = downloading;
}
#endif
//'just' starts doing all the things needed to remove/install selected packages
void PM_ApplyChanges(void)
{
	package_t *p, **link;
	char temp[MAX_OSPATH];

#ifdef WEBCLIENT
	if (pkg_updating)
		return;
	pkg_updating = true;
#endif

//delete any that don't exist
	for (link = &availablepackages; *link ; )
	{
		p = *link;
#ifdef WEBCLIENT
		if (p->download)
			; //erk, dude, don't do two!
		else
#endif
			if ((p->flags & DPF_PURGE) || (!(p->flags&DPF_MARKED) && (p->flags&DPF_ENABLED)))
		{	//if we don't want it but we have it anyway. don't bother to follow this logic when reinstalling
			qboolean reloadpacks = false;
			struct packagedep_s *dep;


			for (dep = p->deps; dep; dep = dep->next)
			{
				if (dep->dtype == DEP_FILE)
				{
					char ext[8];
					COM_FileExtension(dep->name, ext, sizeof(ext));
					if (!stricmp(ext, "pak") || !stricmp(ext, "pk3"))
						reloadpacks = true;

#ifdef PLUGINS		//when disabling/purging plugins, be sure to unload them first (unfortunately there might be some latency before this can actually happen).
					if ((p->flags & DPF_PLUGIN) && !Q_strncasecmp(dep->name, PLUGINPREFIX, strlen(PLUGINPREFIX)))
						Cmd_ExecuteString(va("plug_close %s\n", dep->name), RESTRICT_LOCAL);	//try to purge plugins so there's no files left open
#endif

				}
			}
			if (reloadpacks)	//okay, some package was removed, unload all, do the deletions/disables, then reload them. This is kinda shit. Would be better to remove individual packages, which would avoid unnecessary config execs.
				FS_UnloadPackFiles();

			if ((p->flags & DPF_PURGE) || PM_PurgeOnDisable(p))
			{
				Con_Printf("Purging package %s\n", p->name);
				for (dep = p->deps; dep; dep = dep->next)
				{
					if (dep->dtype == DEP_FILE)
					{
						if (*p->gamedir)
						{
							char *f = va("%s/%s", p->gamedir, dep->name);
							if (PM_TryGenCachedName(f, p, temp, sizeof(temp)) && PM_CheckFile(temp, p->fsroot))
							{
								if (!FS_Remove(temp, p->fsroot))
									p->flags |= DPF_CACHED;
							}
							else if (!FS_Remove(va("%s/%s", p->gamedir, dep->name), p->fsroot))
								p->flags |= DPF_NATIVE;
						}
						else if (!FS_Remove(dep->name, p->fsroot))
							p->flags |= DPF_NATIVE;
					}
				}
			}
			else
			{
				for (dep = p->deps; dep; dep = dep->next)
				{
					if (dep->dtype == DEP_FILE)
					{
						if (*p->gamedir)
						{
							char *f = va("%s/%s", p->gamedir, dep->name);
							if ((p->flags & DPF_NATIVE) && PM_TryGenCachedName(f, p, temp, sizeof(temp)))
								FS_Rename(f, temp, p->fsroot);
						}
					}
				}
				Con_Printf("Disabling package %s\n", p->name);
			}
			p->flags &= ~(DPF_PURGE|DPF_ENABLED);

			/* FIXME: windows bug:
			** deleting an exe might 'succeed' but leave the file on disk for a while anyway.
			** the file will eventually disappear, but until then we'll still see it as present,
			**  be unable to delete it again, and trying to open it to see if it still exists
			**  will fail.
			** there's nothing we can do other than wait until whatever part of
			**  windows that's fucking up releases its handles.
			** thankfully this only affects reinstalling exes/engines.
			*/

			PM_ValidatePackage(p);
			PM_WriteInstalledPackages();

			if (reloadpacks)
				FS_ReloadPackFiles();

			if ((p->flags & DPF_FORGETONUNINSTALL) && !(p->flags & DPF_PRESENT))
			{
#if 1
				downloadablessequence++;
				PM_FreePackage(p);
#else
				if (p->alternative)
				{	//replace it with its alternative package
					*p->link = p->alternative;
					p->alternative->alternative = p->alternative->next;
					if (p->alternative->alternative)
						p->alternative->alternative->link = &p->alternative->alternative;
					p->alternative->next = p->next;
				}
				else
				{	//just remove it from the list.
					*p->link = p->next;
					if (p->next)
						p->next->link = p->link;
				}

//FIXME: the menu(s) hold references to packages, so its not safe to purge them
				p->flags |= DPF_HIDDEN;
//					BZ_Free(p);
#endif

				continue;
			}
		}

		link = &(*link)->next;
	}

#ifdef WEBCLIENT
	//and flag any new/updated ones for a download
	for (p = availablepackages; p ; p=p->next)
	{
		if (!p->download)
			if (((p->flags & DPF_MANIMARKED) && !(p->flags&DPF_PRESENT)) ||	//satisfying a manifest merely requires that it be present, not actually enabled.
				((p->flags&DPF_MARKED) && !(p->flags&DPF_ENABLED)))			//actually enabled stuff requires actual enablement
			{
				p->trymirrors = ~0u;
			}
	}
	PM_StartADownload();	//and try to do those downloads.
#else
	for (p = availablepackages; p; p=p->next)
	{
		if ((p->flags&DPF_MARKED) && !(p->flags&DPF_ENABLED))
		{	//flagged for a (re?)download
			int i;
			struct packagedep_s *dep;
			for (i = 0; i < countof(p->mirror); i++)
				if (p->mirror[i])
					break;
			for (dep = p->deps; dep; dep=dep->next)
				if (dep->dtype == DEP_FILE)
					break;
			if (!dep && i == countof(p->mirror))
			{	//this appears to be a meta package with no download
				//just directly install it.
				p->flags &= ~(DPF_NATIVE|DPF_CACHED|DPF_CORRUPT);
				p->flags |= DPF_ENABLED;

				Con_Printf("Enabled meta package %s\n", p->name);
				PM_WriteInstalledPackages();
				PM_PackageEnabled(p);
			}

			if ((p->flags & DPF_PRESENT) && !PM_PurgeOnDisable(p))
			{	//its in our cache directory, so lets just use that
				p->flags |= DPF_ENABLED;

				Con_Printf("Enabled cached package %s\n", p->name);
				PM_WriteInstalledPackages();
				PM_PackageEnabled(p);
				continue;
			}
			else
				p->flags &= ~DPF_MARKED;
		}
	}
#endif
}

#if defined(M_Menu_Prompt) || defined(SERVERONLY)
//if M_Menu_Prompt is a define, then its a stub...
static void PM_PromptApplyChanges(void)
{
	PM_ApplyChanges();
}
#else
static qboolean PM_DeclinedPackages(char *out, size_t outsize)
{
	size_t ofs = 0;
	package_t *p;
	qboolean ret = false;
	if (manifestpackages)
	{
		char tok[1024];
		char *strings = manifestpackages;
		while (strings && *strings)
		{
			strings = COM_ParseStringSetSep(strings, ';', tok, sizeof(tok));

			//already in the list
			if (PM_NameIsInStrings(declinedpackages, tok))
				continue;

			p = PM_MarkedPackage(tok, DPF_MARKED);
			if (p)	//don't mark it as declined if it wasn't
				continue;

			p = PM_FindPackage(tok);
			if (p)
			{	//okay, it was declined
				ret = true;
				if (!out)
				{	//we're confirming that they should be flagged as declined
					if (declinedpackages)
					{
						char *t = declinedpackages;
						declinedpackages = Z_StrDup(va("%s;%s", declinedpackages, tok));
						Z_Free(t);
					}
					else
						declinedpackages = Z_StrDup(tok);
				}
				else
				{	//we're collecting a list of package names
					char *change = va("%s\n", p->name);
					size_t l = strlen(change);
					if (ofs+l >= outsize)
					{
						Q_strncpyz(out, "Too many changes\n", outsize);
						out = NULL;

						break;
					}
					else
					{
						memcpy(out+ofs, change, l);
						ofs += l;
						out[ofs] = 0;
					}
					break;
				}
			}
		}
	}
	if (!out && ret)
		PM_WriteInstalledPackages();
	return ret;
}
static void PM_PromptApplyChanges_Callback(void *ctx, promptbutton_t opt)
{
#ifdef WEBCLIENT
	pkg_updating = false;
#endif
	if (opt == PROMPT_YES)
		PM_ApplyChanges();
}
static void PM_PromptApplyChanges(void);
static void PM_PromptApplyDecline_Callback(void *ctx, promptbutton_t opt)
{
#ifdef WEBCLIENT
	pkg_updating = false;
#endif
	if (opt == PROMPT_NO)
	{
		PM_DeclinedPackages(NULL, 0);
		PM_PromptApplyChanges();
	}
}
static void PM_PromptApplyChanges(void)
{
	unsigned int changes;
	char text[8192];
#ifdef WEBCLIENT
	//lock it down, so noone can make any changes while this prompt is still displayed
	if (pkg_updating)
	{
		Menu_Prompt(PM_PromptApplyChanges_Callback, NULL, "An update is already in progress\nPlease wait\n", NULL, NULL, "Cancel");
		return;
	}
	pkg_updating = true;
#endif

	strcpy(text, "Really decline the following\nrecommended packages?\n\n");
	if (PM_DeclinedPackages(text+strlen(text), sizeof(text)-strlen(text)))
		Menu_Prompt(PM_PromptApplyDecline_Callback, NULL, text, NULL, "Confirm", "Cancel");
	else
	{
		strcpy(text, "Apply the following changes?\n\n");
		changes = PM_ChangeList(text+strlen(text), sizeof(text)-strlen(text));
		if (!changes)
		{
#ifdef WEBCLIENT
			pkg_updating = false;//no changes...
#endif
		}
		else
			Menu_Prompt(PM_PromptApplyChanges_Callback, NULL, text, "Apply", NULL, "Cancel");
	}
}
#endif
#if defined(HAVE_CLIENT) && defined(WEBCLIENT)
static void PM_AddSubList_Callback(void *ctx, promptbutton_t opt)
{
	if (opt == PROMPT_YES)
	{
		PM_AddSubList(ctx, "", SRCFL_USER|SRCFL_ENABLED);
		PM_WriteInstalledPackages();
	}
	Z_Free(ctx);
}
#endif

//names packages that were listed from the  manifest.
//if 'mark' is true, then this is an initial install.
void PM_ManifestPackage(const char *metaname, int security)
{
	domanifestinstall = security;
	Z_Free(manifestpackages);
	if (metaname)
	{
		manifestpackages = Z_StrDup(metaname);
//		PM_UpdatePackageList(false, false);
	}
	else
		manifestpackages = NULL;
}

qboolean PM_CanInstall(const char *packagename)
{
	int i;
	package_t *p = PM_FindPackage(packagename);
	if (p && !(p->flags&(DPF_ENABLED|DPF_CORRUPT|DPF_HIDDEN)))
	{
		for (i = 0; i < countof(p->mirror); i++)
			if (p->mirror[i])
				return true;
	}
	return false;
}

static int QDECL sortpackages(const void *l, const void *r)
{
	const package_t *a=*(package_t*const*)l, *b=*(package_t*const*)r;
	const char *ac, *bc;
	int order;

	//sort by categories
	ac = a->category?a->category:"";
	bc = b->category?b->category:"";
	order = strcmp(ac,bc);
	if (order)
		return order;

	//otherwise sort by title.
	ac = a->title?a->title:a->name;
	bc = b->title?b->title:b->name;
	order = strcmp(ac,bc);
	return order;
}
void PM_Command_f(void)
{
	package_t *p;
	const char *act = Cmd_Argv(1);
	const char *key;
	qboolean quiet = false;

	if (Cmd_FromGamecode())
	{
		Con_Printf("%s may not be used from gamecode\n", Cmd_Argv(0));
		return;
	}

	if (!strncmp(act, "quiet_", 6))
	{
		quiet = true;	//don't spam so much. for menus to (ab)use.
		act += 6;
	}

	if (!strcmp(act, "sources") || !strcmp(act, "addsource"))
	{
		#ifdef WEBCLIENT
			if (Cmd_Argc() == 2)
			{
				size_t i, c=0;
				for (i = 0; i < pm_numsources; i++)
				{
					if ((pm_source[i].flags & SRCFL_HISTORIC) && !developer.ival)
						continue;	//hidden ones were historically enabled/disabled. remember the state even when using a different fmf, but don't confuse the user.
					Con_Printf("%s %s\n", pm_source[i].url, pm_source[i].flags?"(explicit)":"(implicit)");
					c++;
				}
				Con_Printf("<%u sources>\n", (unsigned)c);
			}
			else
			{
				#ifdef HAVE_CLIENT
					Menu_Prompt(PM_AddSubList_Callback, Z_StrDup(Cmd_Argv(2)), va("Add updates source?\n%s", Cmd_Argv(2)), "Confirm", NULL, "Cancel");
				#else
					PM_AddSubList(Cmd_Argv(2), "", SRCFL_USER|SRCFL_ENABLED);
					PM_WriteInstalledPackages();
				#endif
			}
		#endif
	}
	else if (!strcmp(act, "remsource"))
	{
		#ifdef WEBCLIENT
			PM_RemSubList(Cmd_Argv(2));
			PM_WriteInstalledPackages();
		#endif
	}
	else
	{
	
		if (!loadedinstalled)
			PM_UpdatePackageList(false, false);

		if (!strcmp(act, "list"))
		{
			int i, count;
			package_t **sorted;
			const char *category = "", *newcat;
			struct packagedep_s *dep;
			for (count = 0, p = availablepackages; p; p=p->next)
				count++;
			sorted = Z_Malloc(sizeof(*sorted)*count);
			for (count = 0, p = availablepackages; p; p=p->next)
			{
				if ((p->flags & DPF_HIDDEN) && !(p->flags & (DPF_MARKED|DPF_ENABLED|DPF_PURGE|DPF_CACHED)))
					continue;
				sorted[count++] = p;
			}
			qsort(sorted, count, sizeof(*sorted), sortpackages);
			for (i = 0; i < count; i++)
			{
				char quoted[8192];
				const char *status;
				char *markup;
				p = sorted[i];

				if (p->flags & DPF_ENABLED)
					markup = S_COLOR_GREEN;
				else if (p->flags & DPF_CORRUPT)
					markup = S_COLOR_RED;
				else if (p->flags & (DPF_CACHED))
					markup = S_COLOR_YELLOW;	//downloaded but not active
				else
					markup = S_COLOR_WHITE;

				if (!(p->flags & DPF_MARKED) != !(p->flags & DPF_ENABLED) || (p->flags & DPF_PURGE))
				{
					if (p->flags & DPF_MARKED)
					{
						if (p->flags & DPF_PURGE)
							status = S_COLOR_CYAN"<reinstall>";
						else
							status = S_COLOR_CYAN"<inst	all>";
					}
					else if ((p->flags & DPF_PURGE) || !(p->qhash && (p->flags & DPF_CACHED)))
						status = S_COLOR_CYAN"<uninstall>";
					else
						status = S_COLOR_CYAN"<disable>";
				}
				else if ((p->flags & (DPF_ENABLED|DPF_CACHED)) == DPF_CACHED)
					status = S_COLOR_CYAN"<disabled>";
				else if (p->flags & DPF_USERMARKED)
					status = S_COLOR_GRAY"<manual>";
				else if (p->flags & DPF_AUTOMARKED)
					status = S_COLOR_GRAY"<auto>";
				else
					status = "";

				//show category banner
				newcat = p->category?p->category:"";
				if (strcmp(category, newcat))
				{
					category = newcat;
					Con_Printf("%s\n", category);
				}

				//show quick status display
				if (p->flags & DPF_ENABLED)
					Con_Printf("^&02 ");
				else if (p->flags & DPF_PRESENT)
					Con_Printf("^&0E ");
				else
					Con_Printf("^&04 ");
				if (p->flags & DPF_MARKED)
					Con_Printf("^&02 ");
				else if (!(p->flags & DPF_PURGE) && (p->flags&DPF_PRESENT))
					Con_Printf("^&0E ");
				else
					Con_Printf("^&04 ");

				//show the package details.
				Con_Printf("\t^["S_COLOR_GRAY"%s%s%s%s^] %s"S_COLOR_GRAY" %s (%s%s)", markup, p->name, p->arch?":":"", p->arch?p->arch:"", status, strcmp(p->name, p->title)?p->title:"", p->version, (p->flags&DPF_TESTING)?"-testing":"");

				for (dep = p->deps; dep; dep = dep->next)
				{
					if (dep->dtype == DEP_SOURCE)
						Con_Printf(S_COLOR_MAGENTA" %s", dep->name);
				}

				if (!(p->flags&DPF_MARKED) && p == PM_FindPackage(p->name))
					Con_Printf(" ^[[Add]\\type\\pkg add %s;pkg apply^]", COM_QuotedString(p->name, quoted, sizeof(quoted), false));
				if ((p->flags&DPF_MARKED) && p == PM_MarkedPackage(p->name, DPF_MARKED))
					Con_Printf(" ^[[Remove]\\type\\pkg rem %s;pkg apply^]", COM_QuotedString(p->name, quoted, sizeof(quoted), false));
				Con_Printf("\n");
			}
			Z_Free(sorted);
			Con_Printf("<end of list>\n");
		}
		else if (!strcmp(act, "show"))
		{
			struct packagedep_s *dep;
			int found = 0;
			key = Cmd_Argv(2);
			for (p = availablepackages; p; p=p->next)
			{
				if (Q_strcasecmp(p->name, key))
					continue;

				if (p->previewimage)
					Con_Printf("^[%s (%s)\\tipimg\\%s\\tip\\%s^]\n", p->name, p->version, p->previewimage, "");
				else
					Con_Printf("%s (%s)\n", p->name, p->version);
				if (p->title)
					Con_Printf("	^mtitle: ^m%s\n", p->title);
				if (p->license)
					Con_Printf("	^mlicense: ^m%s\n", p->license);
				if (p->author)
					Con_Printf("	^mauthor: ^m%s\n", p->author);
				if (p->website)
					Con_Printf("	^mwebsite: ^m%s\n", p->website);
				for (dep = p->deps; dep; dep = dep->next)
				{
					if (dep->dtype == DEP_SOURCE)
						Con_Printf("	^msource: ^m%s\n", dep->name);
				}
				if (p->description)
					Con_Printf("%s\n", p->description);

				if (p->flags & DPF_MARKED)
				{
					if (p->flags & DPF_ENABLED)
					{
						if (p->flags & DPF_PURGE)
							Con_Printf("	package is flagged to be re-installed\n");
						else
							Con_Printf("	package is currently installed\n");
					}
					else
						Con_Printf("	package is flagged to be installed\n");
				}
				else
				{
					if (p->flags & DPF_ENABLED)
					{
						if (p->flags & DPF_PURGE)
							Con_Printf("	package is flagged to be purged\n");
						else
							Con_Printf("	package is flagged to be disabled\n");
					}
					else
						Con_Printf("	package is not installed\n");
				}
				if (p->flags & DPF_NATIVE)
					Con_Printf("	package is native\n");
				if (p->flags & DPF_CACHED)
					Con_Printf("	package is cached\n");
				if (p->flags & DPF_CORRUPT)
					Con_Printf("	package is corrupt\n");
				if (p->flags & DPF_DISPLAYVERSION)
					Con_Printf("	package has a version conflict\n");
				if (p->flags & DPF_FORGETONUNINSTALL)
					Con_Printf("	package is obsolete\n");
				if (p->flags & DPF_HIDDEN)
					Con_Printf("	package is hidden\n");
				if (p->flags & DPF_ENGINE)
					Con_Printf("	package is an engine update\n");
				if (p->flags & DPF_TESTING)
					Con_Printf(S_COLOR_YELLOW"	package is untested\n");
#ifdef WEBCLIENT
				if (!PM_SignatureOkay(p))
				{
					if (!p->signature)
						Con_Printf(CON_ERROR"	Signature missing"CON_DEFAULT"\n");			//some idiot forgot to include a signature
					else if (p->flags & DPF_SIGNATUREREJECTED)
						Con_Printf(CON_ERROR"	Signature invalid"CON_DEFAULT"\n");			//some idiot got the wrong auth/sig/hash
					else if (p->flags & DPF_SIGNATUREUNKNOWN)
						Con_Printf(S_COLOR_RED"	Signature is not trusted"CON_DEFAULT"\n");	//clientside permission.
					else
						Con_Printf(CON_ERROR"	Unable to verify signature"CON_DEFAULT"\n");	//clientside problem.
				}
#endif
				found++;
			}
			if (!found)
				Con_Printf("<package not found>\n");
		}
		else if (!strcmp(act, "search") || !strcmp(act, "find"))
		{
			const char *key = Cmd_Argv(2);
			for (p = availablepackages; p; p=p->next)
			{
				if (Q_strcasestr(p->name, key) || (p->title && Q_strcasestr(p->title, key)) || (p->description && Q_strcasestr(p->description, key)))
				{
					Con_Printf("%s\n", p->name);
				}
			}
			Con_Printf("<end of list>\n");
		}
		else if (!strcmp(act, "apply"))
		{
			Con_Printf("Applying package changes\n");
			if (qrenderer != QR_NONE)
				PM_PromptApplyChanges();
			else if (Cmd_ExecLevel == RESTRICT_LOCAL)
				PM_ApplyChanges();
		}
		else if (!strcmp(act, "changes"))
		{
			PM_PrintChanges();
		}
		else if (!strcmp(act, "reset") || !strcmp(act, "revert"))
		{
			PM_RevertChanges();
		}
#ifdef WEBCLIENT
		else if (!strcmp(act, "update"))
		{	//query the servers if we've not already done so.
			//FIXME: regrab if more than an hour ago?
			if (!allowphonehome)
				allowphonehome = -1;	//trigger a prompt, instead of ignoring it.
			PM_UpdatePackageList(false, 0);
		}
		else if (!strcmp(act, "refresh"))
		{	//flush package cache, make a new request even if we already got a response from the server.
			int i;
			for (i = 0; i < pm_numsources; i++)
			{
				if (!(pm_source[i].flags & SRCFL_ENABLED))
					continue;
				pm_source[i].status = SRCSTAT_PENDING;
			}
			if (!allowphonehome)
				allowphonehome = -1;	//trigger a prompt, instead of ignoring it.
			PM_UpdatePackageList(false, 0);
		}
		else if (!strcmp(act, "upgrade"))
		{	//auto-mark any updated packages.
			unsigned int changes = PM_MarkUpdates();
			if (changes)
			{
				if (!quiet)
					Con_Printf("%u packages flagged\n", changes);
				PM_PromptApplyChanges();
			}
			else if (!quiet)
				Con_Printf("Already using latest versions of all packages\n");
		}
#endif
		else if (!strcmp(act, "add") || !strcmp(act, "get") || !strcmp(act, "install") || !strcmp(act, "enable"))
		{	//FIXME: make sure this updates.
			int arg = 2;
			for (arg = 2; arg < Cmd_Argc(); arg++)
			{
				const char *key = Cmd_Argv(arg);
				p = PM_FindPackage(key);
				if (p)
				{
					PM_MarkPackage(p, DPF_USERMARKED);
					p->flags &= ~DPF_PURGE;
				}
				else
					Con_Printf("%s: package %s not known\n", Cmd_Argv(0), key);
			}
			if (!quiet)
				PM_PrintChanges();
		}
#ifdef WEBCLIENT
		else if (!strcmp(act, "reinstall"))
		{	//fixme: favour the current verson.
			int arg = 2;
			for (arg = 2; arg < Cmd_Argc(); arg++)
			{
				const char *key = Cmd_Argv(arg);
				p = PM_FindPackage(key);
				if (p)
				{
					PM_MarkPackage(p, DPF_USERMARKED);
					p->flags |= DPF_PURGE;
				}
				else
					Con_Printf("%s: package %s not known\n", Cmd_Argv(0), key);
			}
			if (!quiet)
				PM_PrintChanges();
		}
#endif
		else if (!strcmp(act, "disable") || !strcmp(act, "rem") || !strcmp(act, "remove"))
		{
			int arg = 2;
			for (arg = 2; arg < Cmd_Argc(); arg++)
			{
				const char *key = Cmd_Argv(arg);
				p = PM_MarkedPackage(key, DPF_MARKED);
				if (!p)
					p = PM_FindPackage(key);
				if (p)
					PM_UnmarkPackage(p, DPF_MARKED);
				else
					Con_Printf("%s: package %s not known\n", Cmd_Argv(0), key);
			}
			if (!quiet)
				PM_PrintChanges();
		}
		else if (!strcmp(act, "del") || !strcmp(act, "purge") || !strcmp(act, "delete") || !strcmp(act, "uninstall"))
		{
			int arg = 2;
			for (arg = 2; arg < Cmd_Argc(); arg++)
			{
				const char *key = Cmd_Argv(arg);
				p = PM_MarkedPackage(key, DPF_MARKED);
				if (!p)
					p = PM_FindPackage(key);
				if (p)
				{
					PM_UnmarkPackage(p, DPF_MARKED);
					if (p->flags & (DPF_PRESENT|DPF_CORRUPT))
						p->flags |=	DPF_PURGE;
				}
				else
					Con_Printf("%s: package %s not known\n", Cmd_Argv(0), key);
			}
			if (!quiet)
				PM_PrintChanges();
		}
		else
			Con_Printf("%s: Unknown action %s\nShould be one of list, show, search, upgrade, revert, add, rem, del, changes, apply, sources, addsource, remsource\n", Cmd_Argv(0), act);
	}
}

qboolean PM_FindUpdatedEngine(char *syspath, size_t syspathsize)
{
	struct packagedep_s *dep;
	package_t *e = NULL, *p;
	char *pfname;
	//figure out what we've previously installed.
	PM_PreparePackageList();

	for (p = availablepackages; p; p = p->next)
	{
		if ((p->flags & DPF_ENGINE) && !(p->flags & DPF_HIDDEN) && p->fsroot == FS_ROOT)
		{
			if ((p->flags & DPF_ENABLED) && (!e || strcmp(e->version, p->version) < 0))
			if (strcmp(enginerevision, "-") && strcmp(enginerevision, p->version) < 0)	//package must be more recent than the current engine too, there's no point auto-updating to an older revision.
			{
				for (dep = p->deps, pfname = NULL; dep; dep = dep->next)
				{
					if (dep->dtype != DEP_FILE)
						continue;
					if (pfname)
					{
						pfname = NULL;
						break;
					}
					pfname = dep->name;
				}

				if (pfname && PM_CheckFile(pfname, p->fsroot))
				{
					if (FS_NativePath(pfname, p->fsroot, syspath, syspathsize))
						e = p;
				}
			}
		}
	}

	if (e)
		return true;
	return false;
}






//called by the filesystem code to make sure needed packages are in the updates system
static const char *FS_RelativeURL(const char *base, const char *file, char *buffer, int bufferlen)
{
	//fixme: cope with windows paths
	qboolean baseisurl = base?!!strchr(base, ':'):false;
	qboolean fileisurl = !!strchr(file, ':');
	//qboolean baseisabsolute = (*base == '/' || *base == '\\');
	qboolean fileisabsolute = (*file == '/' || *file == '\\');
	const char *ebase;

	if (fileisurl || !base)
		return file;
	if (fileisabsolute)
	{
		if (baseisurl)
		{
			ebase = strchr(base, ':');
			ebase++;
			while(*ebase == '/')
				ebase++;
			while(*ebase && *ebase != '/')
				ebase++;
		}
		else
			ebase = base;
	}
	else
		ebase = COM_SkipPath(base);
	memcpy(buffer, base, ebase-base);
	strcpy(buffer+(ebase-base), file);

	return buffer;
}

//this function is called by the filesystem code to start downloading the packages listed by each manifest.
void PM_AddManifestPackages(ftemanifest_t *man)
{
	package_t *p, *m;
	size_t i;
	const char *path;

	char buffer[MAX_OSPATH], *url;
	int idx;
	struct manpack_s *pack;
	const char *baseurl = man->updateurl;

	for (p = availablepackages; p; p = p->next)
		p->flags &= ~DPF_MANIMARKED;

	PM_RevertChanges();

	for (idx = 0; idx < countof(man->package); idx++)
	{
		pack = &man->package[idx];
		if (!pack->type)
			continue;

		//check this package's conditional
		if (pack->condition)
		{
			if (!If_EvaluateBoolean(pack->condition, RESTRICT_LOCAL))
				continue;	//ignore it
		}

		p = Z_Malloc(sizeof(*p));
		p->name = Z_StrDup(pack->path);
		p->title = Z_StrDup(pack->path);
		p->category = Z_StrDup(va("%s/", man->formalname));
		p->priority = PM_DEFAULTPRIORITY;
		p->fsroot = FS_ROOT;
		strcpy(p->version, "");
		p->flags = DPF_FORGETONUNINSTALL|DPF_MANIFEST|DPF_GUESSED;
		p->qhash = pack->crcknown?Z_StrDup(va("%#x", pack->crc)):NULL;

		{
			char *c = p->name;
			for (c=p->name; *c; c++)	//don't get confused.
				if (*c == '/') *c = '_';
		}

		path = pack->path;
		if (pack->type != mdt_installation)
		{
			char *s = strchr(path, '/');
			if (!s)
			{
				PM_FreePackage(p);
				continue;
			}
			*s = 0;
			Q_strncpyz(p->gamedir, path, sizeof(p->gamedir));
			*s = '/';
			path=s+1;
		}

		p->extract = EXTRACT_COPY;
		for (i = 0; i < countof(pack->mirrors) && i < countof(p->mirror); i++)
			if (pack->mirrors[i])
			{
				if (pack->mirrors[i])
				{
					url = pack->mirrors[i];
					if (!strncmp(url, "gz:", 3))
					{
						url+=3;
						p->extract = EXTRACT_GZ;
					}
					else if (!strncmp(url, "xz:", 3))
					{
						url+=3;
						p->extract = EXTRACT_XZ;
					}
					else if (!strncmp(url, "unzip:", 6))
					{
						char *comma;
						url+=6;
						comma = strchr(url, ',');
						if (comma)
						{
							p->extract = EXTRACT_EXPLICITZIP;
							*comma = 0;
							PM_AddDep(p, DEP_EXTRACTNAME, url);
							*comma = ',';
							url = comma+1;
						}
						else
							p->extract = EXTRACT_ZIP;
					}
					/*else if (!strncmp(url, "prompt:", 7))
					{
						url+=7;
						fspdl_extracttype = X_COPY;
					}*/

					p->mirror[i] = Z_StrDup(FS_RelativeURL(baseurl, url, buffer, sizeof(buffer)));
				}
			}
		PM_AddDep(p, DEP_FILE, path);

		m = PM_InsertPackage(p);
		if (!m)
			continue;

		PM_MarkPackage(m, DPF_MANIMARKED);

/*		//okay, so we merged it into m. I guess we already had a copy!
		if (!(m->flags & DPF_PRESENT))
			if (PM_SignatureOkay(m))
				m->trymirrors = ~0;	//FIXME: we should probably mark+prompt...
*/
		continue;
	}

	PM_ApplyChanges();
}

#ifdef HAVE_CLIENT
#include "pr_common.h"
void QCBUILTIN PF_cl_getpackagemanagerinfo(pubprogfuncs_t *prinst, struct globalvars_s *pr_globals)
{
	int packageidx = G_INT(OFS_PARM0);
	enum packagemanagerinfo_e fieldidx = G_INT(OFS_PARM1);
	package_t *p;
	G_INT(OFS_RETURN) = 0;
	for (p = availablepackages; p; p = p->next)
	{
		if ((p->flags & DPF_HIDDEN) && !(p->flags & (DPF_MARKED|DPF_ENABLED|DPF_PURGE|DPF_CACHED)))
			continue;
		if (packageidx--)
			continue;
		switch(fieldidx)
		{
		case GPMI_NAME:
			if (p->arch)
				RETURN_TSTRING(va("%s:%s=%s", p->name, p->arch, p->version));
			else
				RETURN_TSTRING(va("%s=%s", p->name, p->version));
			break;
		case GPMI_CATEGORY:
			RETURN_TSTRING(p->category);
			break;
		case GPMI_TITLE:
			if (p->flags & DPF_DISPLAYVERSION)
				RETURN_TSTRING(va("%s (%s)", p->title, p->version));
			else
				RETURN_TSTRING(p->title);
			break;
		case GPMI_VERSION:
			RETURN_TSTRING(p->version);
			break;
		case GPMI_DESCRIPTION:
			RETURN_TSTRING(p->description);
			break;
		case GPMI_LICENSE:
			RETURN_TSTRING(p->license);
			break;
		case GPMI_AUTHOR:
			RETURN_TSTRING(p->author);
			break;
		case GPMI_WEBSITE:
			RETURN_TSTRING(p->website);
			break;
		case GPMI_FILESIZE:
			if (p->filesize)
				RETURN_TSTRING(va("%lu", (unsigned long)p->filesize));
			break;
		case GPMI_AVAILABLE:
#ifdef WEBCLIENT
			if (PM_SignatureOkay(p))
				RETURN_TSTRING("1");
#endif
			break;

		case GPMI_INSTALLED:
			if (p->flags & DPF_CORRUPT)
				RETURN_TSTRING("corrupt");	//some sort of error
			else if (p->flags & DPF_ENABLED)
				RETURN_TSTRING("enabled");	//its there (and in use)
			else if (p->flags & DPF_PRESENT)
				RETURN_TSTRING("present");	//its there (but ignored)
#ifdef WEBCLIENT
			else if (p->download)
			{	//we're downloading it
				if (p->download->qdownload.sizeunknown&&cls.download->size==0 && p->filesize>0 && p->extract==EXTRACT_COPY)
					RETURN_TSTRING(va("%i%%", (int)((100*p->download->qdownload.completedbytes)/p->filesize)));	//server didn't report total size, but we know how big its meant to be.
				else
					RETURN_TSTRING(va("%i%%", (int)p->download->qdownload.percent));	//we're downloading it.
			}
			else if (p->trymirrors)
				RETURN_TSTRING("pending");	//its queued.
#endif
			break;
		case GPMI_GAMEDIR:
			RETURN_TSTRING(p->gamedir);
			break;

		case GPMI_ACTION:
			if (p->flags & DPF_PURGE)
			{
				if (p->flags & DPF_MARKED)
					RETURN_TSTRING("reinstall");	//user wants to install it
				else
					RETURN_TSTRING("purge");	//wiping it out
			}
			else if (p->flags & DPF_USERMARKED)
				RETURN_TSTRING("user");	//user wants to install it
			else if (p->flags & (DPF_AUTOMARKED|DPF_MANIMARKED))
				RETURN_TSTRING("auto");	//enabled to satisfy a dependancy
			else if (p->flags & DPF_ENABLED)
				RETURN_TSTRING("disable");	//change from enabled to cached.
			else if (p->flags & DPF_PRESENT)
				RETURN_TSTRING("retain");	//keep it in cache
			//else not installed and don't want it.
			break;
		}
		return;
	}
}
#endif

#else
qboolean PM_CanInstall(const char *packagename)
{
	return false;
}
void PM_EnumeratePlugins(void (*callback)(const char *name))
{
}
void PM_ManifestPackage(const char *metaname, int security)
{
}
int PM_IsApplying(qboolean listsonly)
{
	return false;
}
qboolean PM_FindUpdatedEngine(char *syspath, size_t syspathsize)
{
	return false;
}
#endif

#ifdef DOWNLOADMENU
typedef struct {
	menucustom_t *list;
	char intermediatefilename[MAX_QPATH];
	char pathprefix[MAX_QPATH];
	int downloadablessequence;
	char titletext[128];
	char applymessage[128];	//so we can change its text to give it focus
	qboolean populated;
} dlmenu_t;

static void MD_Draw (int x, int y, struct menucustom_s *c, struct emenu_s *m)
{
	package_t *p;
	char *n;
	if (c->dint != downloadablessequence)
		return;	//probably stale
	p = c->dptr;
	if (p)
	{
		if (p->alternative && (p->flags & DPF_HIDDEN))
			p = p->alternative;

#ifdef WEBCLIENT
		if (p->download)
			Draw_FunStringWidth (x, y, va("%i%%", (int)p->download->qdownload.percent), 48, 2, false);
		else if (p->trymirrors)
			Draw_FunStringWidth (x, y, "PND", 48, 2, false);
		else
#endif
		{
			if (p->flags & DPF_USERMARKED)
			{
				if (!(p->flags & DPF_ENABLED))
				{	//DPF_MARKED|!DPF_ENABLED:
					if (p->flags & DPF_PURGE)
						Draw_FunStringWidth (x, y, "GET", 48, 2, false);
					else if (p->flags & (DPF_PRESENT))
						Draw_FunStringWidth (x, y, "USE", 48, 2, false);
					else
						Draw_FunStringWidth (x, y, "GET", 48, 2, false);
				}
				else
				{	//DPF_MARKED|DPF_ENABLED:
					if (p->flags & DPF_PURGE)
						Draw_FunStringWidth (x, y, "GET", 48, 2, false);	//purge and reinstall.
					else if (p->flags & DPF_CORRUPT)
						Draw_FunStringWidth (x, y, "?""?""?", 48, 2, false);
					else
					{
						Draw_FunStringWidth (x, y, "^&02  ", 48, 2, false);	//green
//						Draw_FunStringWidth (x, y, "^Ue080^Ue082", 48, 2, false);
//						Draw_FunStringWidth (x, y, "^Ue083", 48, 2, false);
					}
				}
			}
			else if (p->flags & DPF_MARKED)
			{
				if (!(p->flags & DPF_ENABLED))
				{	//DPF_MARKED|!DPF_ENABLED:
					if (p->flags & DPF_PURGE)
						Draw_FunStringWidth (x, y, "^hGET", 48, 2, false);
					else if (p->flags & (DPF_PRESENT))
						Draw_FunStringWidth (x, y, "^hUSE", 48, 2, false);
					else
						Draw_FunStringWidth (x, y, "^hGET", 48, 2, false);
				}
				else
				{	//DPF_MARKED|DPF_ENABLED:
					if (p->flags & DPF_PURGE)
						Draw_FunStringWidth (x, y, "^hGET", 48, 2, false);	//purge and reinstall.
					else if (p->flags & DPF_CORRUPT)
						Draw_FunStringWidth (x, y, "?""?""?", 48, 2, false);
					else
					{
						Draw_FunStringWidth (x, y, "^&02  ", 48, 2, false);	//green
//						Draw_FunStringWidth (x, y, "^Ue080^Ue082", 48, 2, false);
//						Draw_FunStringWidth (x, y, "^Ue083", 48, 2, false);
					}
				}
			}
			else
			{
				if (!(p->flags & DPF_ENABLED))
				{	//!DPF_MARKED|!DPF_ENABLED:
					if (p->flags & DPF_PURGE)
						Draw_FunStringWidth (x, y, "DEL", 48, 2, false);	//purge
					else if (p->flags & DPF_HIDDEN)
						Draw_FunStringWidth (x, y, "---", 48, 2, false);
					else if (p->flags & DPF_CORRUPT)
						Draw_FunStringWidth (x, y, "!!!", 48, 2, false);
					else
					{
						if (p->flags & DPF_PRESENT)
							Draw_FunStringWidth (x, y, "^&0E  ", 48, 2, false);	//yellow
						else
							Draw_FunStringWidth (x, y, "^&04  ", 48, 2, false);	//red

//						Draw_FunStringWidth (x, y, "^Ue080^Ue082", 48, 2, false);
//						Draw_FunStringWidth (x, y, "^Ue081", 48, 2, false);
//						if (p->flags & DPF_PRESENT)
//							Draw_FunStringWidth (x, y, "-", 48, 2, false);
					}
				}
				else
				{	//!DPF_MARKED|DPF_ENABLED:
					if ((p->flags & DPF_PURGE) || PM_PurgeOnDisable(p))
						Draw_FunStringWidth (x, y, "DEL", 48, 2, false);
					else
						Draw_FunStringWidth (x, y, "REM", 48, 2, false);
				}
			}
		}

		n = p->title;
		if (p->flags & DPF_DISPLAYVERSION)
			n = va("%s (%s)", n, *p->version?p->version:"unversioned");

		if (p->flags & DPF_TESTING)	//hide testing updates 
			n = va("^h%s", n);

		if (!PM_CheckPackageFeatures(p))
			Draw_FunStringWidth(0, y, "!", x+8, true, true);
#ifdef WEBCLIENT
		if (!PM_SignatureOkay(p))
			Draw_FunStringWidth(0, y, "^b!", x+8, true, true);
#endif

//		if (!(p->flags & (DPF_ENABLED|DPF_MARKED|DPF_PRESENT))
//			continue;

//		if (&m->selecteditem->common == &c->common)
//			Draw_AltFunString (x+48, y, n);
//		else
			Draw_FunString(x+48, y, n);
	}
}

static qboolean MD_Key (struct menucustom_s *c, struct emenu_s *m, int key, unsigned int unicode)
{
	extern qboolean	keydown[];
	qboolean ctrl = keydown[K_LCTRL] || keydown[K_RCTRL];
	package_t *p, *p2;
	struct packagedep_s *dep, *dep2;
	if (c->dint != downloadablessequence)
		return false;	//probably stale
	p = c->dptr;
	if (key == 'c' && ctrl)
		Sys_SaveClipboard(CBT_CLIPBOARD, p->website);
	else if (key == K_ENTER || key == K_KP_ENTER || key == K_GP_START || key == K_MOUSE1)
	{
		if (p->alternative && (p->flags & DPF_HIDDEN))
			p = p->alternative;

		if (p->flags & DPF_ENABLED)
		{
			switch (p->flags & (DPF_PURGE|DPF_MARKED))
			{
			case DPF_USERMARKED:
			case DPF_AUTOMARKED:
			case DPF_MARKED:
				PM_UnmarkPackage(p, DPF_MARKED);	//deactivate it
				break;
			case 0:
				p->flags |= DPF_PURGE;	//purge
				if (!PM_PurgeOnDisable(p))
					break;
				//fall through
			case DPF_PURGE:
				PM_MarkPackage(p, DPF_USERMARKED);		//reinstall
//				if (!(p->flags & DPF_HIDDEN) && !(p->flags & DPF_CACHED))
//					break;
				//fall through
			case DPF_USERMARKED|DPF_PURGE:
			case DPF_AUTOMARKED|DPF_PURGE:
			case DPF_MARKED|DPF_PURGE:
				p->flags &= ~DPF_PURGE;	//back to no-change
				break;
			}
		}
		else
		{
			switch (p->flags & (DPF_PURGE|DPF_MARKED))
			{
			case 0:
				PM_MarkPackage(p, DPF_USERMARKED);
				//now: try to install
				break;
			case DPF_AUTOMARKED:	//
				p->flags |= DPF_USERMARKED;
				break;
			case DPF_USERMARKED:
			case DPF_MARKED:
				p->flags |= DPF_PURGE;
#ifdef WEBCLIENT
				//now: re-get despite already having it.
				if ((p->flags & DPF_CORRUPT) || ((p->flags & DPF_PRESENT) && !PM_PurgeOnDisable(p)))
					break;	//only makes sense if we already have a cached copy that we're not going to use.
#endif
				//fallthrough
			case DPF_USERMARKED|DPF_PURGE:
			case DPF_AUTOMARKED|DPF_PURGE:
			case DPF_MARKED|DPF_PURGE:
				PM_UnmarkPackage(p, DPF_MARKED);
				//now: delete
				if ((p->flags & DPF_CORRUPT) || ((p->flags & DPF_PRESENT) && !PM_PurgeOnDisable(p)))
					break;	//only makes sense if we have a cached/corrupt copy of it already
				//fallthrough
			case DPF_PURGE:
				p->flags &= ~DPF_PURGE;
				//now: no change
				break;
			}
		}

		if (p->flags&DPF_MARKED)
		{
			//any other packages that conflict should be flagged for uninstall now that this one will replace it.
			for (p2 = availablepackages; p2; p2 = p2->next)
			{
				if (p == p2)
					continue;
				for (dep = p->deps; dep; dep = dep->next)
				{
					if (dep->dtype != DEP_FILE)
						continue;
					for (dep2 = p2->deps; dep2; dep2 = dep2->next)
					{
						if (dep2->dtype != DEP_FILE)
							continue;
						if (!strcmp(dep->name, dep2->name))
						{
							PM_UnmarkPackage(p2, DPF_MARKED);
							break;
						}
					}
				}
			}
		}
#ifdef WEBCLIENT
		else
			p->trymirrors = 0;
#endif
		return true;
	}

	return false;
}

#ifdef WEBCLIENT
static void MD_Source_Draw (int x, int y, struct menucustom_s *c, struct emenu_s *m)
{
	char *text;
	if (!(pm_source[c->dint].flags & SRCFL_ENABLED))
		Draw_FunStringWidth (x, y, "^&04  ", 48, 2, false);	//red
	else switch(pm_source[c->dint].status)
	{
	case SRCSTAT_OBTAINED:
		Draw_FunStringWidth (x, y, "^&02  ", 48, 2, false);	//green
		break;
	case SRCSTAT_PENDING:
		Draw_FunStringWidth (x, y, "^&0E  ", 48, 2, false);	//yellow
		Draw_FunStringWidth (x, y, "??", 48, 2, false);	//this should be fast... so if they get a chance to see the ?? then there's something bad happening, and the ?? is appropriate.
		break;
	case SRCSTAT_UNTRIED:	//waiting for a refresh.
		Draw_FunStringWidth (x, y, "^&0E  ", 48, 2, false);	//yellow
		break;
	case SRCSTAT_FAILED_DNS:
		Draw_FunStringWidth (x, y, "^&0E  ", 48, 2, false);	//yellow
#ifdef WEBCLIENT
		Draw_FunStringWidth (x, y, "DNS", 48, 2, false);
#endif
		break;
	case SRCSTAT_FAILED_NORESP:
		Draw_FunStringWidth (x, y, "^&0E  ", 48, 2, false);	//yellow
		Draw_FunStringWidth (x, y, "NR", 48, 2, false);
		break;
	case SRCSTAT_FAILED_REFUSED:
		Draw_FunStringWidth (x, y, "^&0E  ", 48, 2, false);	//yellow
		Draw_FunStringWidth (x, y, "REFUSED", 48, 2, false);
		break;
	case SRCSTAT_FAILED_EOF:
		Draw_FunStringWidth (x, y, "^&0E  ", 48, 2, false);	//yellow
		Draw_FunStringWidth (x, y, "EOF", 48, 2, false);
		break;
	case SRCSTAT_FAILED_MITM:
		if ((int)(realtime*4) & 1)	//flash
			Draw_FunStringWidth (x, y, "^&04  ", 48, 2, false);	//red
		else
			Draw_FunStringWidth (x, y, "^&0E  ", 48, 2, false);	//yellow
		Draw_FunStringWidth (x, y, "^bMITM", 48, 2, false);
		break;
	case SRCSTAT_FAILED_HTTP:
		Draw_FunStringWidth (x, y, "^&0E  ", 48, 2, false);	//yellow
		Draw_FunStringWidth (x, y, "404", 48, 2, false);
		break;
	}

	text = va("Source %s", pm_source[c->dint].url);
	Draw_FunString (x+48, y, text);
}
static qboolean MD_Source_Key (struct menucustom_s *c, struct emenu_s *m, int key, unsigned int unicode)
{
	if (key == K_ENTER || key == K_KP_ENTER || key == K_GP_START || key == K_MOUSE1)
	{
		if (pm_source[c->dint].flags & SRCFL_ENABLED)
		{
			pm_source[c->dint].flags = (pm_source[c->dint].flags&~SRCFL_ENABLED)|SRCFL_DISABLED;
			pm_source[c->dint].status = SRCSTAT_PENDING;
		}
		else
		{
			pm_source[c->dint].flags = (pm_source[c->dint].flags&~SRCFL_DISABLED)|SRCFL_ENABLED;
			pm_source[c->dint].status = SRCSTAT_UNTRIED;
		}
		PM_WriteInstalledPackages();
		PM_UpdatePackageList(true, 2);
	}
	return false;
}

static void MD_AutoUpdate_Draw (int x, int y, struct menucustom_s *c, struct emenu_s *m)
{
	char *settings[] = 
	{
		"Off",
		"Stable Updates",
		"Test Updates"
	};
	char *text;
	int setting = bound(0, pkg_autoupdate.ival, 2);

	size_t i;
	for (i = 0; i < pm_numsources && !(pm_source[i].flags & SRCFL_ENABLED); i++);

	text = va("%sAuto Update: ^a%s", (i<pm_numsources)?"":"^h", settings[setting]);
//	if (&m->selecteditem->common == &c->common)
//		Draw_AltFunString (x, y, text);
//	else
		Draw_FunString (x, y, text);
}
static qboolean MD_AutoUpdate_Key (struct menucustom_s *c, struct emenu_s *m, int key, unsigned int unicode)
{
	if (key == K_ENTER || key == K_KP_ENTER || key == K_GP_START || key == K_MOUSE1)
	{
		char nv[8] = "0";
		if (pkg_autoupdate.ival < UPD_TESTING && pkg_autoupdate.ival >= 0)
			Q_snprintfz(nv, sizeof(nv), "%i", pkg_autoupdate.ival+1);
		Cvar_ForceSet(&pkg_autoupdate, nv);
		PM_WriteInstalledPackages();

		PM_UpdatePackageList(true, 0);
	}
	return false;
}

static qboolean MD_MarkUpdatesButton (union menuoption_s *mo,struct emenu_s *m,int key)
{
	if (key == K_ENTER || key == K_KP_ENTER || key == K_GP_START || key == K_MOUSE1)
	{
		PM_MarkUpdates();
		return true;
	}
	return false;
}
#endif

qboolean MD_PopMenu (union menuoption_s *mo,struct emenu_s *m,int key)
{
	if (key == K_ENTER || key == K_KP_ENTER || key == K_GP_START || key == K_MOUSE1)
	{
		M_RemoveMenu(m);
		return true;
	}
	return false;
}

static qboolean MD_ApplyDownloads (union menuoption_s *mo,struct emenu_s *m,int key)
{
	if (key == K_ENTER || key == K_KP_ENTER || key == K_GP_START || key == K_MOUSE1)
	{
		PM_PromptApplyChanges();
		return true;
	}
	return false;
}

static qboolean MD_RevertUpdates (union menuoption_s *mo,struct emenu_s *m,int key)
{
	if (key == K_ENTER || key == K_KP_ENTER || key == K_GP_START || key == K_MOUSE1)
	{
		PM_RevertChanges();
		return true;
	}
	return false;
}

static int MD_AddItemsToDownloadMenu(emenu_t *m, int y, const char *pathprefix)
{
	char path[MAX_QPATH];
	package_t *p;
	menucustom_t *c;
	char *slash;
	menuoption_t *mo;
	int prefixlen = strlen(pathprefix);
	struct packagedep_s *dep;

	//add all packages in this dir
	for (p = availablepackages; p; p = p->next)
	{
		if (strncmp(p->category, pathprefix, prefixlen))
			continue;
		if ((p->flags & DPF_HIDDEN) && (p->arch || !(p->flags & DPF_ENABLED)))
			continue;
		slash = strchr(p->category+prefixlen, '/');
		if (!slash)
		{
			char *head;
			char *desc = p->description;
			if (p->author || p->license || p->website)
				head = va("^aauthor:^U00A0^a%s\n^alicense:^U00A0^a%s\n^awebsite:^U00A0^a%s\n", p->author?p->author:"^hUnknown^h", p->license?p->license:"^hUnknown^h", p->website?p->website:"^hUnknown^h");
			else
				head = NULL;
			if (p->filesize)
			{
				if (!head)
					head = "";
				if (p->filesize < 1024)
					head = va("%s^asize:^U00A0^a%.4f bytes\n", head, (double)p->filesize);
				else if (p->filesize < 1024*1024)
					head = va("%s^asize:^U00A0^a%.4f KB\n", head, (p->filesize/(1024.0)));
				else if (p->filesize < 1024*1024*1024)
					head = va("%s^asize:^U00A0^a%.4f MB\n", head, (p->filesize/(1024.0*1024)));
				else
					head = va("%s^asize:^U00A0^a%.4f GB\n", head, (p->filesize/(1024.0*1024*1024)));
			}

			for (dep = p->deps; dep; dep = dep->next)
			{
				if (dep->dtype == DEP_NEEDFEATURE)
				{
					const char *featname, *enablecmd;
					if (!PM_CheckFeature(dep->name, &featname, &enablecmd))
					{
						if (enablecmd)
							head = va("^aDisabled: ^a%s\n%s", featname, head?head:"");
						else
							head = va("^aUnavailable: ^a%s\n%s", featname, head?head:"");
					}
				}
			}
#ifdef WEBCLIENT
			if (!PM_SignatureOkay(p))
			{
				if (!p->signature)
					head = va(CON_ERROR"^bSignature missing^b"CON_DEFAULT"\n%s", head?head:"");			//some idiot forgot to include a signature
				else if (p->flags & DPF_SIGNATUREREJECTED)
					head = va(CON_ERROR"^bSignature invalid^b"CON_DEFAULT"\n%s", head?head:"");			//some idiot got the wrong auth/sig/hash
				else if (p->flags & DPF_SIGNATUREUNKNOWN)
					head = va(CON_ERROR"^bSignature is not trusted^b"CON_DEFAULT"\n%s", head?head:"");	//clientside permission.
				else
					head = va(CON_ERROR"^bUnable to verify signature^b"CON_DEFAULT"\n%s", head?head:"");	//clientside problem.
			}
#endif

			if (head && desc)
				desc = va("%s\n%s", head, desc);
			else if (head)
				desc = head;

			c = MC_AddCustom(m, 0, y, p, downloadablessequence, desc);
			c->draw = MD_Draw;
			c->key = MD_Key;
			c->common.width = 320-16;
			c->common.height = 8;
			y += 8;

			if (!m->selecteditem)
				m->selecteditem = (menuoption_t*)c;
		}
	}

	//and then try to add any subdirs...
	for (p = availablepackages; p; p = p->next)
	{
		if (strncmp(p->category, pathprefix, prefixlen))
			continue;
		if ((p->flags & DPF_HIDDEN) && (p->arch || !(p->flags & DPF_ENABLED)))
			continue;

		slash = strchr(p->category+prefixlen, '/');
		if (slash)
		{
			Q_strncpyz(path, p->category, MAX_QPATH);
			slash = strchr(path+prefixlen, '/');
			if (slash)
				*slash = '\0';

			for (mo = m->options; mo; mo = mo->common.next)
				if (mo->common.type == mt_text/*mt_button*/)
					if (!strcmp(mo->button.text, path + prefixlen))
						break;
			if (!mo)
			{
				y += 8;
				MC_AddBufferedText(m, 48, 320-16, y, path+prefixlen, false, true);
				y += 8;
				Q_strncatz(path, "/", sizeof(path));
				y = MD_AddItemsToDownloadMenu(m, y, path);
			}
		}
	}
	return y;
}

#include "shader.h"
static void MD_Download_UpdateStatus(struct emenu_s *m)
{
	dlmenu_t *info = m->data;
	int y;
	package_t *p;
	unsigned int totalpackages=0, selectedpackages=0, addpackages=0, rempackages=0;
	menuoption_t *si;
	menubutton_t *b, *d;
#ifdef WEBCLIENT
	int i;
	unsigned int downloads=0;
	menucustom_t *c;
#endif

	if (info->downloadablessequence != downloadablessequence || !info->populated)
	{
		while(m->options)
		{
			menuoption_t *op = m->options;
			m->options = op->common.next;
			if (op->common.iszone)
				Z_Free(op);
		}
		m->cursoritem = m->selecteditem = NULL;
		info->downloadablessequence = downloadablessequence;

		info->populated = false;
		MC_AddWhiteText(m, 24, 320, 8, "Downloads", false)->text = info->titletext;
		MC_AddWhiteText(m, 16, 320, 24, "^Ue01d^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01e^Ue01f", false);

		//FIXME: should probably reselect the previous selected item. lets just assume everyone uses a mouse...
	}

	for (p = availablepackages; p; p = p->next)
	{
		if (p->alternative && (p->flags & DPF_HIDDEN))
			p = p->alternative;

		totalpackages++;
#ifdef WEBCLIENT
		if (p->download || p->trymirrors)
			downloads++;	//downloading or pending
#endif
		if (p->flags & DPF_MARKED)
		{
			if (p->flags & DPF_ENABLED)
			{
				selectedpackages++;
				if (p->flags & DPF_PURGE)
				{
					rempackages++;
					addpackages++;
				}
			}
			else
			{
				selectedpackages++;
				if (p->flags & DPF_PURGE)
					rempackages++;	//adding, but also deleting. how weird is that!
				addpackages++;
			}
		}
		else
		{
			if (p->flags & DPF_ENABLED)
				rempackages++;
			else
			{
				if (p->flags & DPF_PURGE)
					rempackages++;
			}
		}
	}

	//show status.
	if (cls.download)
	{	//we can actually download more than one thing at a time, but that makes the UI messy, so only show one active download here.
		if (cls.download->sizeunknown && cls.download->size == 0)
			Q_snprintfz(info->titletext, sizeof(info->titletext), "Downloads (%ukbps - %s)", CL_DownloadRate()/1000, cls.download->localname);
		else
			Q_snprintfz(info->titletext, sizeof(info->titletext), "Downloads (%u%% %ukbps - %s)", (int)cls.download->percent, CL_DownloadRate()/1000, cls.download->localname);
	}
	else if (!addpackages && !rempackages)
		Q_snprintfz(info->titletext, sizeof(info->titletext), "Downloads (%i of %i)", selectedpackages, totalpackages);
	else
		Q_snprintfz(info->titletext, sizeof(info->titletext), "Downloads (+%u -%u)", addpackages, rempackages);

	if (pkg_updating)
		Q_snprintfz(info->applymessage, sizeof(info->applymessage), "Apply (please wait)");
	else if (addpackages || rempackages)
		Q_snprintfz(info->applymessage, sizeof(info->applymessage), "%sApply (+%u -%u)", ((int)(realtime*4)&3)?"^a":"", addpackages, rempackages);
	else
		Q_snprintfz(info->applymessage, sizeof(info->applymessage), "Apply");

	if (!info->populated)
	{
		y = 48;

		info->populated = true;
		MC_AddFrameStart(m, 48);
#ifdef WEBCLIENT
		for (i = 0; i < pm_numsources; i++)
		{
			if (pm_source[i].flags & SRCFL_HISTORIC)
				continue;	//historic... ignore it.
			c = MC_AddCustom(m, 0, y, p, i, NULL);
			c->draw = MD_Source_Draw;
			c->key = MD_Source_Key;
			c->common.width = 320-48-16;
			c->common.height = 8;

			if (!m->selecteditem)
				m->selecteditem = (menuoption_t*)c;
			y += 8;
		}
		y+=4;	//small gap
#endif
		b = MC_AddCommand(m, 48, 320-16, y, info->applymessage, MD_ApplyDownloads);
		b->rightalign = false;
		b->common.tooltip = "Enable/Disable/Download/Delete packages to match any changes made (you will be prompted with a list of the changes that will be made).";
		y+=8;
		d = b = MC_AddCommand(m, 48, 320-16, y, "Back", MD_PopMenu);
		b->rightalign = false;
		y+=8;
#ifdef WEBCLIENT
		b = MC_AddCommand(m, 48, 320-16, y, "Mark Updates", MD_MarkUpdatesButton);
		b->rightalign = false;
		b->common.tooltip = "Select any updated versions of packages that are already installed.";
		y+=8;
#endif
		b = MC_AddCommand(m, 48, 320-16, y, "Revert Updates", MD_RevertUpdates);
		b->rightalign = false;
		b->common.tooltip = "Reset selection to only those packages that are currently installed.";
		y+=8;
#ifdef WEBCLIENT
		c = MC_AddCustom(m, 48, y, p, 0, NULL);
		c->draw = MD_AutoUpdate_Draw;
		c->key = MD_AutoUpdate_Key;
		c->common.width = 320-48-16;
		c->common.height = 8;
		y += 8;
#endif
		y+=4;	//small gap
		MD_AddItemsToDownloadMenu(m, y, info->pathprefix);
		if (!m->selecteditem)
			m->selecteditem = (menuoption_t*)d;
		m->cursoritem = (menuoption_t*)MC_AddWhiteText(m, 40, 0, m->selecteditem->common.posy, NULL, false);
		MC_AddFrameEnd(m, 48);
	}

	si = m->mouseitem;
	if (!si)
		si = m->selecteditem;
	if (si && si->common.type == mt_custom && si->custom.dptr)
	{
		package_t *p = si->custom.dptr;
		if (p->previewimage)
		{
			shader_t *sh = R_RegisterPic(p->previewimage, NULL);
			if (R_GetShaderSizes(sh, NULL, NULL, false) > 0)
				R2D_Image(0, 0, vid.width, vid.height, 0, 0, 1, 1, sh);
		}
	}
}

void Menu_DownloadStuff_f (void)
{
	emenu_t *menu;
	dlmenu_t *info;

	menu = M_CreateMenu(sizeof(dlmenu_t));
	info = menu->data;

	menu->menu.persist = true;
	menu->predraw = MD_Download_UpdateStatus;
	info->downloadablessequence = downloadablessequence;


	Q_strncpyz(info->pathprefix, Cmd_Argv(1), sizeof(info->pathprefix));
	if (!*info->pathprefix || !loadedinstalled)
		PM_UpdatePackageList(false, true);

	info->populated = false;	//will add any headers as needed
}

#ifndef SERVERONLY
static void PM_ConfirmSource(void *ctx, promptbutton_t button)
{
	size_t i;
	if (button == PROMPT_YES || button == PROMPT_NO)
	{
		for (i = 0; i < pm_numsources; i++)
		{
			if (!strcmp(pm_source[i].url, ctx))
			{
				pm_source[i].flags |= (button == PROMPT_YES)?SRCFL_ENABLED:SRCFL_DISABLED;
				Menu_Download_Update();
				return;
			}
		}
	}
}
#endif

//should only be called AFTER the filesystem etc is inited.
void Menu_Download_Update(void)
{
	if (pkg_autoupdate.ival <= 0)
		return;

	PM_UpdatePackageList(true, 2);

#ifndef SERVERONLY
	if (fs_manifest && pkg_autoupdate.ival > 0)
	{	//only prompt if autoupdate is actually enabled.
		int i;
		for (i = 0; i < pm_numsources; i++)
		{
			if (pm_source[i].flags & SRCFL_HISTORIC)
				continue;	//hidden anyway
			if (!(pm_source[i].flags & (SRCFL_ENABLED|SRCFL_DISABLED)))
			{
				Menu_Prompt(PM_ConfirmSource, Z_StrDup(pm_source[i].url), va("Enable update source\n\n^x66F%s", pm_source[i].url), "Enable", "Disable", "Later");
				pm_source[i].flags |= SRCFL_PROMPTED;
				break;
			}
		}
		/*if (!pluginpromptshown && i < pm_numsources)
		{
			pluginpromptshown = true;
			Menu_Prompt(PM_AutoUpdateQuery, NULL, "Configure update sources now?", "View", NULL, "Later");
		}*/
	}
#endif
}
#else
void Menu_Download_Update(void)
{
#ifdef PACKAGEMANAGER
	PM_UpdatePackageList(true, 2);
#endif
}
void Menu_DownloadStuff_f (void)
{
	Con_Printf("Download menu not implemented in this build\n");
}
#endif