mirror of
https://github.com/ZDoom/gzdoom.git
synced 2024-11-10 23:01:50 +00:00
136 lines
2.9 KiB
C
136 lines
2.9 KiB
C
/* updaterevision.c
|
|
*
|
|
* Public domain. This program uses git commands command to get
|
|
* various bits of repository status for a particular directory
|
|
* and writes it into a header file so that it can be used for a
|
|
* project's versioning.
|
|
*/
|
|
|
|
#define _CRT_SECURE_NO_DEPRECATE
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include <errno.h>
|
|
|
|
#ifdef _WIN32
|
|
#define popen _popen
|
|
#define pclose _pclose
|
|
#endif
|
|
|
|
// Used to strip newline characters from lines read by fgets.
|
|
void stripnl(char *str)
|
|
{
|
|
if (*str != '\0')
|
|
{
|
|
size_t len = strlen(str);
|
|
if (str[len - 1] == '\n')
|
|
{
|
|
str[len - 1] = '\0';
|
|
}
|
|
}
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
char vertag[128], lastlog[128], lasthash[128], *hash = NULL;
|
|
FILE *stream = NULL;
|
|
int gotrev = 0, needupdate = 1;
|
|
|
|
vertag[0] = '\0';
|
|
lastlog[0] = '\0';
|
|
|
|
if (argc != 2)
|
|
{
|
|
fprintf(stderr, "Usage: %s <path to gitinfo.h>\n", argv[0]);
|
|
return 1;
|
|
}
|
|
|
|
// Use git describe --tags to get a version string. If we are sitting directly
|
|
// on a tag, it returns that tag. Otherwise it returns <most recent tag>-<number of
|
|
// commits since the tag>-<short hash>.
|
|
// Use git log to get the time of the latest commit in ISO 8601 format and its full hash.
|
|
stream = popen("git describe --tags --dirty=-m && git log -1 --format=%ai*%H", "r");
|
|
|
|
if (NULL != stream)
|
|
{
|
|
if (fgets(vertag, sizeof vertag, stream) == vertag &&
|
|
fgets(lastlog, sizeof lastlog, stream) == lastlog)
|
|
{
|
|
stripnl(vertag);
|
|
stripnl(lastlog);
|
|
gotrev = 1;
|
|
}
|
|
|
|
pclose(stream);
|
|
}
|
|
|
|
if (gotrev)
|
|
{
|
|
hash = strchr(lastlog, '*');
|
|
if (hash != NULL)
|
|
{
|
|
*hash = '\0';
|
|
hash++;
|
|
}
|
|
}
|
|
if (hash == NULL)
|
|
{
|
|
fprintf(stderr, "Failed to get commit info: %s\n", strerror(errno));
|
|
strcpy(vertag, "<unknown version>");
|
|
lastlog[0] = '\0';
|
|
lastlog[1] = '0';
|
|
lastlog[2] = '\0';
|
|
hash = lastlog + 1;
|
|
}
|
|
|
|
stream = fopen (argv[1], "r");
|
|
if (stream != NULL)
|
|
{
|
|
if (!gotrev)
|
|
{ // If we didn't get a revision but the file does exist, leave it alone.
|
|
fclose (stream);
|
|
return 0;
|
|
}
|
|
// Read the revision that's in this file already. If it's the same as
|
|
// what we've got, then we don't need to modify it and can avoid rebuilding
|
|
// dependant files.
|
|
if (fgets(lasthash, sizeof lasthash, stream) == lasthash)
|
|
{
|
|
stripnl(lasthash);
|
|
if (strcmp(hash, lasthash + 3) == 0)
|
|
{
|
|
needupdate = 0;
|
|
}
|
|
}
|
|
fclose (stream);
|
|
}
|
|
|
|
if (needupdate)
|
|
{
|
|
stream = fopen (argv[1], "w");
|
|
if (stream == NULL)
|
|
{
|
|
return 1;
|
|
}
|
|
fprintf(stream,
|
|
"// %s\n"
|
|
"//\n"
|
|
"// This file was automatically generated by the\n"
|
|
"// updaterevision tool. Do not edit by hand.\n"
|
|
"\n"
|
|
"#define GIT_DESCRIPTION \"%s\"\n"
|
|
"#define GIT_HASH \"%s\"\n"
|
|
"#define GIT_TIME \"%s\"\n",
|
|
hash, vertag, hash, lastlog);
|
|
fclose(stream);
|
|
fprintf(stderr, "%s updated to commit %s.\n", argv[1], vertag);
|
|
}
|
|
else
|
|
{
|
|
fprintf (stderr, "%s is up to date at commit %s.\n", argv[1], vertag);
|
|
}
|
|
|
|
return 0;
|
|
}
|