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Use nonrelative paths instead of absolute paths for cloned repositories

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Particularly for the "alternates" file, if one will be created, we
want a path that doesn't depend on the current directory, but we want
to retain any symlinks in the path as given and any in the user's view
of the current directory when the path was given.

Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Daniel Barkalow
2008-06-05 23:15:19 -04:00
committed by Junio C Hamano
parent 9e1f0a85c6
commit 1b9a9467f8
3 changed files with 39 additions and 2 deletions
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36
path.c
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@ -291,6 +291,42 @@ int adjust_shared_perm(const char *path)
return 0;
}
static const char *get_pwd_cwd(void)
{
static char cwd[PATH_MAX + 1];
char *pwd;
struct stat cwd_stat, pwd_stat;
if (getcwd(cwd, PATH_MAX) == NULL)
return NULL;
pwd = getenv("PWD");
if (pwd && strcmp(pwd, cwd)) {
stat(cwd, &cwd_stat);
if (!stat(pwd, &pwd_stat) &&
pwd_stat.st_dev == cwd_stat.st_dev &&
pwd_stat.st_ino == cwd_stat.st_ino) {
strlcpy(cwd, pwd, PATH_MAX);
}
}
return cwd;
}
const char *make_nonrelative_path(const char *path)
{
static char buf[PATH_MAX + 1];
if (path[0] == '/') {
if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
die ("Too long path: %.*s", 60, path);
} else {
const char *cwd = get_pwd_cwd();
if (!cwd)
die("Cannot determine the current working directory");
if (snprintf(buf, PATH_MAX, "%s/%s", cwd, path) >= PATH_MAX)
die ("Too long path: %.*s", 60, path);
}
return buf;
}
/* We allow "recursive" symbolic links. Only within reason, though. */
#define MAXDEPTH 5