int check_filename(const char *prefix, const char *arg)
{
const char *name;
+ char *to_free = NULL;
struct stat st;
if (starts_with(arg, ":/")) {
return 1;
name = arg + 2;
} else if (prefix)
- name = prefix_filename(prefix, strlen(prefix), arg);
+ name = to_free = prefix_filename(prefix, arg);
else
name = arg;
- if (!lstat(name, &st))
+ if (!lstat(name, &st)) {
+ free(to_free);
return 1; /* file exists */
- if (errno == ENOENT || errno == ENOTDIR)
+ }
+ if (errno == ENOENT || errno == ENOTDIR) {
+ free(to_free);
return 0; /* file does not exist */
+ }
die_errno("failed to stat '%s'", arg);
}
if (!is_absolute_path(data.buf))
strbuf_addf(&path, "%s/", gitdir);
strbuf_addbuf(&path, &data);
- strbuf_addstr(sb, real_path(path.buf));
+ strbuf_add_real_path(sb, path.buf);
ret = 1;
} else {
strbuf_addstr(sb, gitdir);
ssize_t len;
if (stat(path, &st)) {
+ /* NEEDSWORK: discern between ENOENT vs other errors */
error_code = READ_GITFILE_ERR_STAT_FAILED;
goto cleanup_return;
}
/* --work-tree is set without --git-dir; use discovered one */
if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
+ char *to_free = NULL;
+ const char *ret;
+
if (offset != cwd->len && !is_absolute_path(gitdir))
- gitdir = real_pathdup(gitdir);
+ gitdir = to_free = real_pathdup(gitdir, 1);
if (chdir(cwd->buf))
die_errno("Could not come back to cwd");
- return setup_explicit_git_dir(gitdir, cwd, nongit_ok);
+ ret = setup_explicit_git_dir(gitdir, cwd, nongit_ok);
+ free(to_free);
+ return ret;
}
/* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
/* --work-tree is set without --git-dir; use discovered one */
if (getenv(GIT_WORK_TREE_ENVIRONMENT) || git_work_tree_cfg) {
- const char *gitdir;
+ static const char *gitdir;
gitdir = offset == cwd->len ? "." : xmemdupz(cwd->buf, offset);
if (chdir(cwd->buf))
/* Keep entry but do not canonicalize it */
return 1;
} else {
- char *real_path = real_pathdup(ceil);
+ char *real_path = real_pathdup(ceil, 0);
if (!real_path) {
return 0;
}
GIT_DIR_BARE,
/* these are errors */
GIT_DIR_HIT_CEILING = -1,
- GIT_DIR_HIT_MOUNT_POINT = -2
+ GIT_DIR_HIT_MOUNT_POINT = -2,
+ GIT_DIR_INVALID_GITFILE = -3
};
/*
* is relative to `dir` (i.e. *not* necessarily the cwd).
*/
static enum discovery_result setup_git_directory_gently_1(struct strbuf *dir,
- struct strbuf *gitdir)
+ struct strbuf *gitdir,
+ int die_on_error)
{
const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
struct string_list ceiling_dirs = STRING_LIST_INIT_DUP;
if (one_filesystem)
current_device = get_device_or_die(dir->buf, NULL, 0);
for (;;) {
- int offset = dir->len;
+ int offset = dir->len, error_code = 0;
if (offset > min_offset)
strbuf_addch(dir, '/');
strbuf_addstr(dir, DEFAULT_GIT_DIR_ENVIRONMENT);
- gitdirenv = read_gitfile(dir->buf);
- if (!gitdirenv && is_git_directory(dir->buf))
- gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT;
+ gitdirenv = read_gitfile_gently(dir->buf, die_on_error ?
+ NULL : &error_code);
+ if (!gitdirenv) {
+ if (die_on_error ||
+ error_code == READ_GITFILE_ERR_NOT_A_FILE) {
+ /* NEEDSWORK: fail if .git is not file nor dir */
+ if (is_git_directory(dir->buf))
+ gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT;
+ } else if (error_code != READ_GITFILE_ERR_STAT_FAILED)
+ return GIT_DIR_INVALID_GITFILE;
+ }
strbuf_setlen(dir, offset);
if (gitdirenv) {
strbuf_addstr(gitdir, gitdirenv);
}
}
+const char *discover_git_directory(struct strbuf *gitdir)
+{
+ struct strbuf dir = STRBUF_INIT, err = STRBUF_INIT;
+ size_t gitdir_offset = gitdir->len, cwd_len;
+ struct repository_format candidate;
+
+ if (strbuf_getcwd(&dir))
+ return NULL;
+
+ cwd_len = dir.len;
+ if (setup_git_directory_gently_1(&dir, gitdir, 0) <= 0) {
+ strbuf_release(&dir);
+ return NULL;
+ }
+
+ /*
+ * The returned gitdir is relative to dir, and if dir does not reflect
+ * the current working directory, we simply make the gitdir absolute.
+ */
+ if (dir.len < cwd_len && !is_absolute_path(gitdir->buf + gitdir_offset)) {
+ /* Avoid a trailing "/." */
+ if (!strcmp(".", gitdir->buf + gitdir_offset))
+ strbuf_setlen(gitdir, gitdir_offset);
+ else
+ strbuf_addch(&dir, '/');
+ strbuf_insert(gitdir, gitdir_offset, dir.buf, dir.len);
+ }
+
+ strbuf_reset(&dir);
+ strbuf_addf(&dir, "%s/config", gitdir->buf + gitdir_offset);
+ read_repository_format(&candidate, dir.buf);
+ strbuf_release(&dir);
+
+ if (verify_repository_format(&candidate, &err) < 0) {
+ warning("ignoring git dir '%s': %s",
+ gitdir->buf + gitdir_offset, err.buf);
+ strbuf_release(&err);
+ return NULL;
+ }
+
+ return gitdir->buf + gitdir_offset;
+}
+
const char *setup_git_directory_gently(int *nongit_ok)
{
static struct strbuf cwd = STRBUF_INIT;
struct strbuf dir = STRBUF_INIT, gitdir = STRBUF_INIT;
- const char *prefix;
+ const char *prefix, *env_prefix;
/*
* We may have read an incomplete configuration before
die_errno(_("Unable to read current working directory"));
strbuf_addbuf(&dir, &cwd);
- switch (setup_git_directory_gently_1(&dir, &gitdir)) {
+ switch (setup_git_directory_gently_1(&dir, &gitdir, 1)) {
case GIT_DIR_NONE:
prefix = NULL;
break;
die("BUG: unhandled setup_git_directory_1() result");
}
+ env_prefix = getenv(GIT_TOPLEVEL_PREFIX_ENVIRONMENT);
+ if (env_prefix)
+ prefix = env_prefix;
+
if (prefix)
setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1);
else