mirror of
https://github.com/ZDoom/qzdoom-gpl.git
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129 lines
2.9 KiB
C
129 lines
2.9 KiB
C
/* updaterevision.c
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*
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* Public domain. This program uses the svnversion command to get the
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* repository revision for a particular directory and writes it into
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* a header file so that it can be used as a project's build number.
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*/
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#define _CRT_SECURE_NO_DEPRECATE
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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int main(int argc, char **argv)
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{
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char *name;
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char currev[64], lastrev[64], run[256], *rev;
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unsigned long urev;
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FILE *stream = NULL;
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int gotrev = 0, needupdate = 1;
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if (argc != 3)
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{
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fprintf (stderr, "Usage: %s <repository directory> <path to svnrevision.h>\n", argv[0]);
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return 1;
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}
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// Use svnversion to get the revision number. If that fails, pretend it's
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// revision 0. Note that this requires you have the command-line svn tools installed.
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sprintf (run, "svnversion -cn %s", argv[1]);
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if ((name = tempnam(NULL, "svnout")) != NULL)
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{
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#ifdef __APPLE__
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// tempnam will return errno of 2 even though it is successful for our purposes.
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errno = 0;
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#endif
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if((stream = freopen(name, "w+b", stdout)) != NULL &&
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system(run) == 0 &&
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errno == 0 &&
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fseek(stream, 0, SEEK_SET) == 0 &&
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fgets(currev, sizeof currev, stream) == currev &&
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(isdigit(currev[0]) || (currev[0] == '-' && currev[1] == '1')))
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{
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gotrev = 1;
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}
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}
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if (stream != NULL)
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{
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fclose (stream);
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remove (name);
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}
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if (name != NULL)
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{
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free (name);
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}
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if (!gotrev)
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{
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fprintf (stderr, "Failed to get current revision: %s\n", strerror(errno));
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strcpy (currev, "0");
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rev = currev;
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}
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else
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{
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rev = strchr (currev, ':');
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if (rev == NULL)
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{
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rev = currev;
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}
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else
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{
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rev += 1;
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}
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}
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stream = fopen (argv[2], "r");
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if (stream != NULL)
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{
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if (!gotrev)
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{ // If we didn't get a revision but the file does exist, leave it alone.
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fclose (stream);
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return 0;
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}
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// Read the revision that's in this file already. If it's the same as
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// what we've got, then we don't need to modify it and can avoid rebuilding
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// dependant files.
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if (fgets(lastrev, sizeof lastrev, stream) == lastrev)
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{
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if (lastrev[0] != '\0')
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{ // Strip trailing \n
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lastrev[strlen(lastrev) - 1] = '\0';
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}
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if (strcmp(rev, lastrev + 3) == 0)
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{
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needupdate = 0;
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}
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}
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fclose (stream);
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}
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if (needupdate)
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{
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stream = fopen (argv[2], "w");
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if (stream == NULL)
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{
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return 1;
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}
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urev = strtoul(rev, NULL, 10);
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fprintf (stream,
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"// %s\n"
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"//\n"
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"// This file was automatically generated by the\n"
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"// updaterevision tool. Do not edit by hand.\n"
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"\n"
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"#define SVN_REVISION_STRING \"%s\"\n"
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"#define SVN_REVISION_NUMBER %lu\n",
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rev, rev, urev);
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fclose (stream);
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fprintf (stderr, "%s updated to revision %s.\n", argv[2], rev);
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}
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else
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{
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fprintf (stderr, "%s is up to date at revision %s.\n", argv[2], rev);
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}
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return 0;
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}
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