The next commit requires that set_git_dir_init() must be called before
init_db(). Let's make sure nobody can do otherwise.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
---
 builtin/clone.c   | 15 +++++++--------
 builtin/init-db.c | 18 +++++++++++-------
 cache.h           |  5 +++--
 3 files changed, 21 insertions(+), 17 deletions(-)

diff --git a/builtin/clone.c b/builtin/clone.c
index 6616392..29b1832 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -928,23 +928,22 @@ int cmd_clone(int argc, const char **argv, const char 
*prefix)
                set_git_work_tree(work_tree);
        }
 
-       junk_git_dir = git_dir;
+       junk_git_dir = real_git_dir ? real_git_dir : git_dir;
        if (safe_create_leading_directories_const(git_dir) < 0)
                die(_("could not create leading directories of '%s'"), git_dir);
 
-       set_git_dir_init(git_dir, real_git_dir, 0);
-       if (real_git_dir) {
-               git_dir = real_git_dir;
-               junk_git_dir = real_git_dir;
-       }
-
        if (0 <= option_verbosity) {
                if (option_bare)
                        fprintf(stderr, _("Cloning into bare repository 
'%s'...\n"), dir);
                else
                        fprintf(stderr, _("Cloning into '%s'...\n"), dir);
        }
-       init_db(option_template, INIT_DB_QUIET);
+
+       init_db(git_dir, real_git_dir, option_template, INIT_DB_QUIET);
+
+       if (real_git_dir)
+               git_dir = real_git_dir;
+
        write_config(&option_config);
 
        git_config(git_default_config, NULL);
diff --git a/builtin/init-db.c b/builtin/init-db.c
index d5d7558..5cb05d9 100644
--- a/builtin/init-db.c
+++ b/builtin/init-db.c
@@ -311,8 +311,9 @@ static void create_object_directory(void)
        strbuf_release(&path);
 }
 
-int set_git_dir_init(const char *git_dir, const char *real_git_dir,
-                    int exist_ok)
+static int set_git_dir_init(const char *git_dir,
+                           const char *real_git_dir,
+                           int exist_ok)
 {
        if (real_git_dir) {
                struct stat st;
@@ -359,10 +360,14 @@ static void separate_git_dir(const char *git_dir)
        write_file(git_link, "gitdir: %s", git_dir);
 }
 
-int init_db(const char *template_dir, unsigned int flags)
+int init_db(const char *git_dir, const char *real_git_dir,
+           const char *template_dir, unsigned int flags)
 {
        int reinit;
-       const char *git_dir = get_git_dir();
+
+       set_git_dir_init(git_dir, real_git_dir, flags & INIT_DB_EXIST_OK);
+
+       git_dir = get_git_dir();
 
        if (git_link)
                separate_git_dir(git_dir);
@@ -582,7 +587,6 @@ int cmd_init_db(int argc, const char **argv, const char 
*prefix)
                        set_git_work_tree(work_tree);
        }
 
-       set_git_dir_init(git_dir, real_git_dir, 1);
-
-       return init_db(template_dir, flags);
+       flags |= INIT_DB_EXIST_OK;
+       return init_db(git_dir, real_git_dir, template_dir, flags);
 }
diff --git a/cache.h b/cache.h
index b2d77f3..7fc875f 100644
--- a/cache.h
+++ b/cache.h
@@ -525,9 +525,10 @@ extern void verify_non_filename(const char *prefix, const 
char *name);
 extern int path_inside_repo(const char *prefix, const char *path);
 
 #define INIT_DB_QUIET 0x0001
+#define INIT_DB_EXIST_OK 0x0002
 
-extern int set_git_dir_init(const char *git_dir, const char *real_git_dir, 
int);
-extern int init_db(const char *template_dir, unsigned int flags);
+extern int init_db(const char *git_dir, const char *real_git_dir,
+                  const char *template_dir, unsigned int flags);
 
 extern void sanitize_stdfds(void);
 extern int daemonize(void);
-- 
2.8.2.524.g6ff3d78

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