Use git_config_early() instead of git_config() during repo setup

When git_config() is called, either git_dir has already been set (by
$GIT_DIR env or set_git_dir()), or it will default git_dir to ".git".

git_config_early() gives setup functions more freedom because it does
not require git_dir. Give it a config path, it will happily examine
it.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/setup.c b/setup.c
index a3b76de2bb1c18e2f3b8cdf5799c3c650b16d027..49a1a2525a871ba408146cd57e6b82cc43898f5e 100644 (file)
--- a/setup.c
+++ b/setup.c
@@ -243,9 +243,21 @@ void setup_work_tree(void)
        initialized = 1;
 }
 
-static int check_repository_format_gently(int *nongit_ok)
+static int check_repository_format_gently(const char *gitdir, int *nongit_ok)
 {
-       git_config(check_repository_format_version, NULL);
+       char repo_config[PATH_MAX+1];
+
+       /*
+        * git_config() can't be used here because it calls git_pathdup()
+        * to get $GIT_CONFIG/config. That call will make setup_git_env()
+        * set git_dir to ".git".
+        *
+        * We are in gitdir setup, no git dir has been found useable yet.
+        * 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);
        if (GIT_REPO_VERSION < repository_format_version) {
                if (!nongit_ok)
                        die ("Expected git repo version <= %d, found %d",
@@ -331,11 +343,11 @@ static const char *setup_explicit_git_dir(const char *gitdirenv,
        if (!work_tree_env) {
                retval = set_work_tree(gitdirenv);
                /* config may override worktree */
-               if (check_repository_format_gently(nongit_ok))
+               if (check_repository_format_gently(gitdirenv, nongit_ok))
                        return NULL;
                return retval;
        }
-       if (check_repository_format_gently(nongit_ok))
+       if (check_repository_format_gently(gitdirenv, nongit_ok))
                return NULL;
        retval = get_relative_cwd(buffer, sizeof(buffer) - 1,
                        get_git_work_tree());
@@ -357,11 +369,17 @@ static int cwd_contains_git_dir(const char **gitfile_dirp)
                        die("Repository setup failed");
                return 1;
        }
-       return is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT);
+       if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT)) {
+               *gitfile_dirp = DEFAULT_GIT_DIR_ENVIRONMENT;
+               return 1;
+       }
+       return 0;
 }
 
 static const char *setup_discovered_git_dir(const char *work_tree_env,
-               int offset, int len, char *cwd, int *nongit_ok)
+                                           const char *gitdir,
+                                           int offset, int len,
+                                           char *cwd, int *nongit_ok)
 {
        int root_len;
 
@@ -370,7 +388,7 @@ static const char *setup_discovered_git_dir(const char *work_tree_env,
                inside_work_tree = 1;
        root_len = offset_1st_component(cwd);
        git_work_tree_cfg = xstrndup(cwd, offset > root_len ? offset : root_len);
-       if (check_repository_format_gently(nongit_ok))
+       if (check_repository_format_gently(gitdir, nongit_ok))
                return NULL;
        if (offset == len)
                return NULL;
@@ -396,9 +414,12 @@ static const char *setup_bare_git_dir(const char *work_tree_env,
                root_len = offset_1st_component(cwd);
                cwd[offset > root_len ? offset : root_len] = '\0';
                set_git_dir(cwd);
-       } else
+               check_repository_format_gently(cwd, nongit_ok);
+       }
+       else {
                set_git_dir(".");
-       check_repository_format_gently(nongit_ok);
+               check_repository_format_gently(".", nongit_ok);
+       }
        return NULL;
 }
 
@@ -478,8 +499,10 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
                current_device = get_device_or_die(".", NULL);
        for (;;) {
                if (cwd_contains_git_dir(&gitfile_dir))
-                       return setup_discovered_git_dir(work_tree_env, offset,
-                                                       len, cwd, nongit_ok);
+                       return setup_discovered_git_dir(work_tree_env,
+                                                       gitfile_dir,
+                                                       offset, len,
+                                                       cwd, nongit_ok);
                if (is_git_directory("."))
                        return setup_bare_git_dir(work_tree_env, offset,
                                                        len, cwd, nongit_ok);
@@ -590,7 +613,7 @@ int check_repository_format_version(const char *var, const char *value, void *cb
 
 int check_repository_format(void)
 {
-       return check_repository_format_gently(NULL);
+       return check_repository_format_gently(get_git_dir(), NULL);
 }
 
 /*