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-rw-r--r--setup.c124
1 files changed, 97 insertions, 27 deletions
diff --git a/setup.c b/setup.c
index 979b13f..fb61860 100644
--- a/setup.c
+++ b/setup.c
@@ -224,6 +224,36 @@ void verify_non_filename(const char *prefix, const char *arg)
"'git <command> [<revision>...] -- [<file>...]'", arg);
}
+int get_common_dir(struct strbuf *sb, const char *gitdir)
+{
+ struct strbuf data = STRBUF_INIT;
+ struct strbuf path = STRBUF_INIT;
+ const char *git_common_dir = getenv(GIT_COMMON_DIR_ENVIRONMENT);
+ int ret = 0;
+ if (git_common_dir) {
+ strbuf_addstr(sb, git_common_dir);
+ return 1;
+ }
+ strbuf_addf(&path, "%s/commondir", gitdir);
+ if (file_exists(path.buf)) {
+ if (strbuf_read_file(&data, path.buf, 0) <= 0)
+ die_errno(_("failed to read %s"), path.buf);
+ while (data.len && (data.buf[data.len - 1] == '\n' ||
+ data.buf[data.len - 1] == '\r'))
+ data.len--;
+ data.buf[data.len] = '\0';
+ strbuf_reset(&path);
+ if (!is_absolute_path(data.buf))
+ strbuf_addf(&path, "%s/", gitdir);
+ strbuf_addbuf(&path, &data);
+ strbuf_addstr(sb, real_path(path.buf));
+ ret = 1;
+ } else
+ strbuf_addstr(sb, gitdir);
+ strbuf_release(&data);
+ strbuf_release(&path);
+ return ret;
+}
/*
* Test if it looks like we're at a git directory.
@@ -238,31 +268,40 @@ void verify_non_filename(const char *prefix, const char *arg)
*/
int is_git_directory(const char *suspect)
{
- char path[PATH_MAX];
- size_t len = strlen(suspect);
+ struct strbuf path = STRBUF_INIT;
+ int ret = 0;
+ size_t len;
- if (PATH_MAX <= len + strlen("/objects"))
- die("Too long path: %.*s", 60, suspect);
- strcpy(path, suspect);
+ /* Check worktree-related signatures */
+ strbuf_addf(&path, "%s/HEAD", suspect);
+ if (validate_headref(path.buf))
+ goto done;
+
+ strbuf_reset(&path);
+ get_common_dir(&path, suspect);
+ len = path.len;
+
+ /* Check non-worktree-related signatures */
if (getenv(DB_ENVIRONMENT)) {
if (access(getenv(DB_ENVIRONMENT), X_OK))
- return 0;
+ goto done;
}
else {
- strcpy(path + len, "/objects");
- if (access(path, X_OK))
- return 0;
+ strbuf_setlen(&path, len);
+ strbuf_addstr(&path, "/objects");
+ if (access(path.buf, X_OK))
+ goto done;
}
- strcpy(path + len, "/refs");
- if (access(path, X_OK))
- return 0;
-
- strcpy(path + len, "/HEAD");
- if (validate_headref(path))
- return 0;
+ strbuf_setlen(&path, len);
+ strbuf_addstr(&path, "/refs");
+ if (access(path.buf, X_OK))
+ goto done;
- return 1;
+ ret = 1;
+done:
+ strbuf_release(&path);
+ return ret;
}
int is_inside_git_dir(void)
@@ -304,9 +343,28 @@ void setup_work_tree(void)
initialized = 1;
}
+static int check_repo_format(const char *var, const char *value, void *cb)
+{
+ if (strcmp(var, "core.repositoryformatversion") == 0)
+ repository_format_version = git_config_int(var, value);
+ else if (strcmp(var, "core.sharedrepository") == 0)
+ shared_repository = git_config_perm(var, value);
+ return 0;
+}
+
static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
{
- char repo_config[PATH_MAX+1];
+ struct strbuf sb = STRBUF_INIT;
+ const char *repo_config;
+ config_fn_t fn;
+ int ret = 0;
+
+ if (get_common_dir(&sb, gitdir))
+ fn = check_repo_format;
+ else
+ fn = check_repository_format_version;
+ strbuf_addstr(&sb, "/config");
+ repo_config = sb.buf;
/*
* git_config() can't be used here because it calls git_pathdup()
@@ -317,8 +375,7 @@ static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
* Use a gentler version of git_config() to check if this repo
* is a good one.
*/
- snprintf(repo_config, PATH_MAX, "%s/config", gitdir);
- git_config_early(check_repository_format_version, NULL, repo_config);
+ git_config_early(fn, NULL, repo_config);
if (GIT_REPO_VERSION < repository_format_version) {
if (!nongit_ok)
die ("Expected git repo version <= %d, found %d",
@@ -327,9 +384,21 @@ static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
GIT_REPO_VERSION, repository_format_version);
warning("Please upgrade Git");
*nongit_ok = -1;
- return -1;
+ ret = -1;
}
- return 0;
+ strbuf_release(&sb);
+ return ret;
+}
+
+static void update_linked_gitdir(const char *gitfile, const char *gitdir)
+{
+ struct strbuf path = STRBUF_INIT;
+ struct stat st;
+
+ strbuf_addf(&path, "%s/gitfile", gitdir);
+ if (stat(path.buf, &st) || st.st_mtime + 24 * 3600 < time(NULL))
+ write_file(path.buf, 0, "%s\n", gitfile);
+ strbuf_release(&path);
}
/*
@@ -380,6 +449,8 @@ const char *read_gitfile(const char *path)
if (!is_git_directory(dir))
die("Not a git repository: %s", dir);
+
+ update_linked_gitdir(path, dir);
path = real_path(dir);
free(buf);
@@ -799,11 +870,10 @@ int git_config_perm(const char *var, const char *value)
int check_repository_format_version(const char *var, const char *value, void *cb)
{
- if (strcmp(var, "core.repositoryformatversion") == 0)
- repository_format_version = git_config_int(var, value);
- else if (strcmp(var, "core.sharedrepository") == 0)
- shared_repository = git_config_perm(var, value);
- else if (strcmp(var, "core.bare") == 0) {
+ int ret = check_repo_format(var, value, cb);
+ if (ret)
+ return ret;
+ if (strcmp(var, "core.bare") == 0) {
is_bare_repository_cfg = git_config_bool(var, value);
if (is_bare_repository_cfg == 1)
inside_work_tree = -1;