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repo: add path.git-prefix path key 

Scripts and command-line prompt integrations frequently need to know their
relative depth inside a repository working tree layout. Currently, this
is retrieved using `git rev-parse --show-prefix`.

Introduce the `path.git-prefix` key to `git repo info`. This mirrors the
prefix location tracking framework as a standalone key, returning the
exact relative path offset complete with a trailing slash, or an empty
string if run directly at the repository working tree root.

Mentored-by: Justin Tobler <jltobler@gmail.com>
Mentored-by: Lucas Seiki Oshiro <lucasseikioshiro@gmail.com>
Signed-off-by: K Jayatheerth <jayatheerthkulkarni2005@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
seen
K Jayatheerth 2026-07-17 19:00:15 +05:30 committed by Junio C Hamano
parent f02168e2f4
commit ce29634748
3 changed files with 35 additions and 0 deletions
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5
Documentation/git-repo.adoc
View File

@ -113,6 +113,11 @@ values that they return:
The path to the Git repository's common directory relative to
the current working directory.

`path.git-prefix`::
The relative path from the top-level directory of the working tree to
the current working directory (including a trailing slash). Outputs an
empty string if executed at the root of the working tree.

`path.gitdir.absolute`::
The canonical absolute path to the Git repository directory (the `.git` directory).


11
builtin/repo.c
View File

@ -100,6 +100,16 @@ static int get_path_commondir_relative(struct repository *repo, struct strbuf *b
return 0;
}

static int get_path_git_prefix(struct repository *repo UNUSED, struct strbuf *buf)
{
/*
* startup_info->prefix is NULL if we are at the working tree root.
* We add an empty string to ensure the buffer is cleanly initialized.
*/
strbuf_addstr(buf, startup_info->prefix ? startup_info->prefix : "");
return 0;
}

static int get_path_gitdir_absolute(struct repository *repo, struct strbuf *buf)
{
const char *git_dir = repo_get_git_dir(repo);
@ -278,6 +288,7 @@ static const struct repo_info_field repo_info_field[] = {
{ "object.format", get_object_format },
{ "path.commondir.absolute", get_path_commondir_absolute },
{ "path.commondir.relative", get_path_commondir_relative },
{ "path.git-prefix", get_path_git_prefix },
{ "path.gitdir.absolute", get_path_gitdir_absolute },
{ "path.gitdir.relative", get_path_gitdir_relative },
{ "path.grafts.absolute", get_path_grafts_absolute },

19
t/t1900-repo-info.sh
View File

@ -207,6 +207,25 @@ test_repo_info_path 'commondir with only GIT_DIR' 'commondir' \
'.git' \
'GIT_DIR="../.git" && export GIT_DIR'

test_expect_success 'path.git-prefix at root and in a subdirectory' '
test_when_finished "rm -rf repo" &&
git init repo &&
(
cd repo &&

echo "path.git-prefix=" >expect.root &&
git repo info path.git-prefix >actual.root &&
test_cmp expect.root actual.root &&

mkdir -p sub/dir &&
cd sub/dir &&

echo "path.git-prefix=sub/dir/" >expect.sub &&
git repo info path.git-prefix >actual.sub &&
test_cmp expect.sub actual.sub
)
'

test_repo_info_path 'gitdir standard' 'gitdir' '.git'

test_repo_info_path 'gitdir with explicit GIT_DIR' 'gitdir' \