[PATCH v2 16/21] setup.c: keep track of the .git file location if read

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 cache.h       |  2 +-
 environment.c |  2 +-
 setup.c       | 44 ++++++++++++++++++++++++++++++--------------
 3 files changed, 32 insertions(+), 16 deletions(-)

diff --git a/cache.h b/cache.h
index 4c09223..e036a7d 100644
--- a/cache.h
+++ b/cache.h
@@ -411,7 +411,7 @@ extern const char *get_git_namespace(void);
 extern const char *strip_namespace(const char *namespaced_ref);
 extern const char *get_git_work_tree(void);
 extern const char *read_gitfile(const char *path);
-extern const char *read_gitfile_super(const char *path, char **super);
+extern const char *read_gitfile_super(const char *path, char **super, char **gitfile);
 extern const char *resolve_gitdir(const char *suspect);
 extern void set_git_work_tree(const char *tree);
 
diff --git a/environment.c b/environment.c
index 5cbbe11..61aff23 100644
--- a/environment.c
+++ b/environment.c
@@ -130,7 +130,7 @@ static void setup_git_env(void)
 	git_dir = getenv(GIT_DIR_ENVIRONMENT);
 	if (!git_dir)
 		git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
-	gitfile = read_gitfile_super(git_dir, &super);
+	gitfile = read_gitfile_super(git_dir, &super, NULL);
 	git_dir = xstrdup(gitfile ? gitfile : git_dir);
 	if (super)
 		git_super_dir = xstrdup(super);
diff --git a/setup.c b/setup.c
index 7ccb1f8..ac7d90c 100644
--- a/setup.c
+++ b/setup.c
@@ -332,7 +332,7 @@ static char *path_from_gitfile(const char *path, const char *buf, int len)
  * to the absolute path of the given path. The next line contains the
  * repo id.
  */
-const char *read_gitfile_super(const char *path, char **super)
+const char *read_gitfile_super(const char *path, char **super, char **gitfile)
 {
 	char *buf, *dir;
 	struct stat st;
@@ -384,6 +384,10 @@ const char *read_gitfile_super(const char *path, char **super)
 
 	if (!is_git_directory_super(dir, super ? *super : NULL))
 		die("Not a git repository: %s", dir);
+
+	if (gitfile)
+		*gitfile = xstrdup(real_path(path));
+
 	path = real_path(dir);
 
 	free(dir);
@@ -393,14 +397,15 @@ const char *read_gitfile_super(const char *path, char **super)
 
 const char *read_gitfile(const char *path)
 {
-	return read_gitfile_super(path, NULL);
+	return read_gitfile_super(path, NULL, NULL);
 }
 
 
 static const char *setup_explicit_git_dir(const char *gitdirenv,
 					  const char *super,
 					  char *cwd, int len,
-					  int *nongit_ok)
+					  int *nongit_ok,
+					  char **gitfile_path)
 {
 	const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
 	const char *worktree;
@@ -413,7 +418,8 @@ static const char *setup_explicit_git_dir(const char *gitdirenv,
 	if (super)
 		gitfile = (char*)read_gitfile(gitdirenv);
 	else {
-		gitfile = (char*)read_gitfile_super(gitdirenv, &super_new);
+		gitfile = (char*)read_gitfile_super(gitdirenv, &super_new,
+						    gitfile_path);
 		super = super_new;
 	}
 	if (gitfile) {
@@ -500,7 +506,8 @@ done_null:
 static const char *setup_discovered_git_dir(const char *gitdir,
 					    const char *super,
 					    char *cwd, int offset, int len,
-					    int *nongit_ok)
+					    int *nongit_ok,
+					    char **gitfile_path)
 {
 	if (check_repository_format_gently(super ? super : gitdir, nongit_ok))
 		return NULL;
@@ -512,7 +519,8 @@ static const char *setup_discovered_git_dir(const char *gitdir,
 			gitdir = xstrdup(real_path(gitdir));
 		if (chdir(cwd))
 			die_errno("Could not come back to cwd");
-		return setup_explicit_git_dir(gitdir, super, cwd, len, nongit_ok);
+		return setup_explicit_git_dir(gitdir, super, cwd, len,
+					      nongit_ok, gitfile_path);
 	}
 
 	/* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
@@ -540,7 +548,8 @@ static const char *setup_discovered_git_dir(const char *gitdir,
 }
 
 /* #16.1, #17.1, #20.1, #21.1, #22.1 (see t1510) */
-static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongit_ok)
+static const char *setup_bare_git_dir(char *cwd, int offset, int len,
+				      int *nongit_ok, char **gitfile_path)
 {
 	int root_len;
 
@@ -556,7 +565,8 @@ static const char *setup_bare_git_dir(char *cwd, int offset, int len, int *nongi
 		gitdir = offset == len ? "." : xmemdupz(cwd, offset);
 		if (chdir(cwd))
 			die_errno("Could not come back to cwd");
-		return setup_explicit_git_dir(gitdir, NULL, cwd, len, nongit_ok);
+		return setup_explicit_git_dir(gitdir, NULL, cwd, len,
+					      nongit_ok, gitfile_path);
 	}
 
 	inside_git_dir = 1;
@@ -630,7 +640,8 @@ static int canonicalize_ceiling_entry(struct string_list_item *item,
  * We cannot decide in this function whether we are in the work tree or
  * not, since the config can only be read _after_ this function was called.
  */
-static const char *setup_git_directory_gently_1(int *nongit_ok)
+static const char *setup_git_directory_gently_1(int *nongit_ok,
+						char **gitfile_path)
 {
 	const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
 	struct string_list ceiling_dirs = STRING_LIST_INIT_DUP;
@@ -662,7 +673,8 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
 	super = getenv(GIT_SUPER_DIR_ENVIRONMENT);
 	if (gitdirenv)
 		return setup_explicit_git_dir(gitdirenv, super,
-					      cwd, len, nongit_ok);
+					      cwd, len, nongit_ok,
+					      gitfile_path);
 
 	if (env_ceiling_dirs) {
 		int empty_entry_found = 0;
@@ -696,7 +708,7 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
 			gitfile = (char*)read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
 		else {
 			gitfile = (char*)read_gitfile_super(DEFAULT_GIT_DIR_ENVIRONMENT,
-							    &super_new);
+							    &super_new, gitfile_path);
 			super = super_new;
 		}
 		if (gitfile)
@@ -709,7 +721,8 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
 		if (gitdirenv) {
 			ret = setup_discovered_git_dir(gitdirenv, super,
 						       cwd, offset, len,
-						       nongit_ok);
+						       nongit_ok,
+						       gitfile_path);
 			free(gitfile);
 			free(super_new);
 			return ret;
@@ -717,7 +730,8 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
 		free(gitfile);
 
 		if (is_git_directory(".")) {
-			ret = setup_bare_git_dir(cwd, offset, len, nongit_ok);
+			ret = setup_bare_git_dir(cwd, offset, len,
+						 nongit_ok, gitfile_path);
 			free(super_new);
 			return ret;
 		}
@@ -754,8 +768,9 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
 const char *setup_git_directory_gently(int *nongit_ok)
 {
 	const char *prefix;
+	char *gitfile = NULL;
 
-	prefix = setup_git_directory_gently_1(nongit_ok);
+	prefix = setup_git_directory_gently_1(nongit_ok, &gitfile);
 	if (prefix)
 		setenv(GIT_PREFIX_ENVIRONMENT, prefix, 1);
 	else
@@ -765,6 +780,7 @@ const char *setup_git_directory_gently(int *nongit_ok)
 		startup_info->have_repository = !nongit_ok || !*nongit_ok;
 		startup_info->prefix = prefix;
 	}
+	free(gitfile);
 	return prefix;
 }
 
-- 
1.8.5.1.77.g42c48fa