setup: clean up setup_discovered_git_dir()

If core.bare is true, discard the discovered worktree, move back to
original cwd.

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

setup.c

@@ -362,39 +362,27 @@ static const char *setup_explicit_git_dir(const char *gitdirenv,
 	return retval;
 }
 
-static int cwd_contains_git_dir(const char **gitfile_dirp)
+static const char *setup_discovered_git_dir(const char *gitdir,
+					    char *cwd, int offset, int len,
+					    int *nongit_ok)
 {
-	const char *gitfile_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
-	*gitfile_dirp = gitfile_dir;
-	if (gitfile_dir) {
-		if (set_git_dir(gitfile_dir))
-			die("Repository setup failed");
-		return 1;
-	}
-	if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT)) {
-		*gitfile_dirp = DEFAULT_GIT_DIR_ENVIRONMENT;
-		return 1;
-	}
-	return 0;
-}
+	if (check_repository_format_gently(gitdir, nongit_ok))
+		return NULL;
 
-static const char *setup_discovered_git_dir(const char *work_tree_env,
-					    const char *gitdir,
-					    int offset, int len,
-					    char *cwd, int *nongit_ok)
-{
-	int root_len;
-	char *work_tree;
+	/* #16.2, #17.2, #20.2, #21.2, #24, #25, #28, #29 (see t1510) */
+	if (is_bare_repository_cfg > 0) {
+		set_git_dir(offset == len ? gitdir : make_absolute_path(gitdir));
+		if (chdir(cwd))
+			die_errno("Could not come back to cwd");
+		return NULL;
+	}
 
+	/* #0, #1, #5, #8, #9, #12, #13 */
+	set_git_work_tree(".");
+	if (strcmp(gitdir, DEFAULT_GIT_DIR_ENVIRONMENT))
+		set_git_dir(gitdir);
 	inside_git_dir = 0;
-	if (!work_tree_env)
-		inside_work_tree = 1;
-	root_len = offset_1st_component(cwd);
-	work_tree = xstrndup(cwd, offset > root_len ? offset : root_len);
-	set_git_work_tree(work_tree);
-	free(work_tree);
-	if (check_repository_format_gently(gitdir, nongit_ok))
-		return NULL;
+	inside_work_tree = 1;
 	if (offset == len)
 		return NULL;
 
@@ -456,8 +444,8 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
 	const char *work_tree_env = getenv(GIT_WORK_TREE_ENVIRONMENT);
 	const char *env_ceiling_dirs = getenv(CEILING_DIRECTORIES_ENVIRONMENT);
 	static char cwd[PATH_MAX+1];
-	const char *gitdirenv;
-	const char *gitfile_dir;
+	const char *gitdirenv, *ret;
+	char *gitfile;
 	int len, offset, ceil_offset;
 	dev_t current_device = 0;
 	int one_filesystem = 1;
@@ -502,11 +490,23 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
 	if (one_filesystem)
 		current_device = get_device_or_die(".", NULL);
 	for (;;) {
-		if (cwd_contains_git_dir(&gitfile_dir))
-			return setup_discovered_git_dir(work_tree_env,
-							gitfile_dir,
-							offset, len,
-							cwd, nongit_ok);
+		gitfile = (char*)read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
+		if (gitfile)
+			gitdirenv = gitfile = xstrdup(gitfile);
+		else {
+			if (is_git_directory(DEFAULT_GIT_DIR_ENVIRONMENT))
+				gitdirenv = DEFAULT_GIT_DIR_ENVIRONMENT;
+		}
+
+		if (gitdirenv) {
+			ret = setup_discovered_git_dir(gitdirenv,
+						       cwd, offset, len,
+						       nongit_ok);
+			free(gitfile);
+			return ret;
+		}
+		free(gitfile);
+
 		if (is_git_directory("."))
 			return setup_bare_git_dir(cwd, offset, len, nongit_ok);
 

t/t1510-repo-setup.sh

@@ -2350,7 +2350,7 @@ EOF
 	test_repo 16
 '
 
-test_expect_failure '#16.2: in subdir' '
+test_expect_success '#16.2: in subdir' '
 	cat >16/sub/expected <<EOF &&
 setup: git_dir: $TRASH_DIRECTORY/16/.git
 setup: worktree: (null)
@@ -2479,7 +2479,7 @@ EOF
 	test_repo 17
 '
 
-test_expect_failure '#17.2: in subdir' '
+test_expect_success '#17.2: in subdir' '
 	cat >17/sub/expected <<EOF &&
 setup: git_dir: $TRASH_DIRECTORY/17/.git
 setup: worktree: (null)
@@ -2944,7 +2944,7 @@ EOF
 	test_repo 20
 '
 
-test_expect_failure '#20.2: in subdir' '
+test_expect_success '#20.2: in subdir' '
 	cat >20/sub/expected <<EOF &&
 setup: git_dir: $TRASH_DIRECTORY/20/.git
 setup: worktree: (null)
@@ -3074,7 +3074,7 @@ EOF
 	test_repo 21
 '
 
-test_expect_failure '#21.2: in subdir' '
+test_expect_success '#21.2: in subdir' '
 	cat >21/sub/expected <<EOF &&
 setup: git_dir: $TRASH_DIRECTORY/21/.git
 setup: worktree: (null)
@@ -3716,7 +3716,7 @@ test_expect_success '#24: setup' '
 	cd ..
 '
 
-test_expect_failure '#24: at root' '
+test_expect_success '#24: at root' '
 	cat >24/expected <<EOF &&
 setup: git_dir: $TRASH_DIRECTORY/24.git
 setup: worktree: (null)
@@ -3726,7 +3726,7 @@ EOF
 	test_repo 24
 '
 
-test_expect_failure '#24: in subdir' '
+test_expect_success '#24: in subdir' '
 	cat >24/sub/expected <<EOF &&
 setup: git_dir: $TRASH_DIRECTORY/24.git
 setup: worktree: (null)
@@ -3766,7 +3766,7 @@ test_expect_success '#25: setup' '
 	cd ..
 '
 
-test_expect_failure '#25: at root' '
+test_expect_success '#25: at root' '
 	cat >25/expected <<EOF &&
 setup: git_dir: $TRASH_DIRECTORY/25.git
 setup: worktree: (null)
@@ -3776,7 +3776,7 @@ EOF
 	test_repo 25
 '
 
-test_expect_failure '#25: in subdir' '
+test_expect_success '#25: in subdir' '
 	cat >25/sub/expected <<EOF &&
 setup: git_dir: $TRASH_DIRECTORY/25.git
 setup: worktree: (null)
@@ -4151,7 +4151,7 @@ test_expect_success '#28: setup' '
 	cd ..
 '
 
-test_expect_failure '#28: at root' '
+test_expect_success '#28: at root' '
 	cat >28/expected <<EOF &&
 setup: git_dir: $TRASH_DIRECTORY/28.git
 setup: worktree: (null)
@@ -4161,7 +4161,7 @@ EOF
 	test_repo 28
 '
 
-test_expect_failure '#28: in subdir' '
+test_expect_success '#28: in subdir' '
 	cat >28/sub/expected <<EOF &&
 setup: git_dir: $TRASH_DIRECTORY/28.git
 setup: worktree: (null)
@@ -4201,7 +4201,7 @@ test_expect_success '#29: setup' '
 	cd ..
 '
 
-test_expect_failure '#29: at root' '
+test_expect_success '#29: at root' '
 	cat >29/expected <<EOF &&
 setup: git_dir: $TRASH_DIRECTORY/29.git
 setup: worktree: (null)
@@ -4211,7 +4211,7 @@ EOF
 	test_repo 29
 '
 
-test_expect_failure '#29: in subdir' '
+test_expect_success '#29: in subdir' '
 	cat >29/sub/expected <<EOF &&
 setup: git_dir: $TRASH_DIRECTORY/29.git
 setup: worktree: (null)