repo: add path keys to repo info

Add a path category to git repo info with key-value pairs that
mirror repository paths users commonly retrieve via rev-parse and
git-path lookups.

This makes scripting against repo metadata more direct and avoids
shelling out to multiple commands for related paths.

The new keys are introduced as explicit path.* entries in
repo_info_fields and are resolved through dedicated helpers.

This keeps lookup behavior predictable and makes future path
additions straightforward.

Signed-off-by: Eslam reda ragheb <eslam.reda.div@gmail.com>

Author: eslam-reda-div

builtin/repo.c

@@ -1,10 +1,12 @@
 #define USE_THE_REPOSITORY_VARIABLE
 
 #include "builtin.h"
+#include "abspath.h"
 #include "environment.h"
 #include "hex.h"
 #include "odb.h"
 #include "parse-options.h"
+#include "path.h"
 #include "path-walk.h"
 #include "progress.h"
 #include "quote.h"
@@ -14,6 +16,7 @@
 #include "strbuf.h"
 #include "string-list.h"
 #include "shallow.h"
+#include "submodule.h"
 #include "utf8.h"
 
 static const char *const repo_usage[] = {
@@ -40,6 +43,13 @@ struct field {
 	get_value_fn *get_value;
 };
 
+static void repo_info_add_path(struct repo_info *info,
+			      struct strbuf *buf,
+			      const char *path)
+{
+	strbuf_add_absolute_path(buf, path);
+}
+
 static int get_layout_bare(struct repo_info *info UNUSED, struct strbuf *buf)
 {
 	strbuf_addstr(buf, is_bare_repository() ? "true" : "false");
@@ -61,6 +71,119 @@ static int get_object_format(struct repo_info *info, struct strbuf *buf)
 	return 0;
 }
 
+static int get_path_common_dir(struct repo_info *info, struct strbuf *buf)
+{
+	repo_info_add_path(info, buf, repo_get_common_dir(info->repo));
+	return 0;
+}
+
+static int get_path_config_file(struct repo_info *info, struct strbuf *buf)
+{
+	struct strbuf path = STRBUF_INIT;
+
+	repo_info_add_path(info, buf, repo_git_path_replace(info->repo, &path, "config"));
+	strbuf_release(&path);
+	return 0;
+}
+
+static int get_path_git_dir(struct repo_info *info, struct strbuf *buf)
+{
+	repo_info_add_path(info, buf, repo_get_git_dir(info->repo));
+	return 0;
+}
+
+static int get_path_git_prefix(struct repo_info *info, struct strbuf *buf)
+{
+	if (info->prefix)
+		strbuf_addstr(buf, info->prefix);
+	return 0;
+}
+
+static int get_path_grafts_file(struct repo_info *info, struct strbuf *buf)
+{
+	repo_info_add_path(info, buf, repo_get_graft_file(info->repo));
+	return 0;
+}
+
+static int get_path_hooks_directory(struct repo_info *info, struct strbuf *buf)
+{
+	struct strbuf path = STRBUF_INIT;
+
+	repo_info_add_path(info, buf, repo_git_path_replace(info->repo, &path, "hooks"));
+	strbuf_release(&path);
+	return 0;
+}
+
+static int get_path_index_file(struct repo_info *info, struct strbuf *buf)
+{
+	repo_info_add_path(info, buf, repo_get_index_file(info->repo));
+	return 0;
+}
+
+static int get_path_logs_directory(struct repo_info *info, struct strbuf *buf)
+{
+	struct strbuf path = STRBUF_INIT;
+
+	repo_info_add_path(info, buf, repo_git_path_replace(info->repo, &path, "logs"));
+	strbuf_release(&path);
+	return 0;
+}
+
+static int get_path_objects_directory(struct repo_info *info, struct strbuf *buf)
+{
+	repo_info_add_path(info, buf, repo_get_object_directory(info->repo));
+	return 0;
+}
+
+static int get_path_packed_refs_file(struct repo_info *info, struct strbuf *buf)
+{
+	struct strbuf path = STRBUF_INIT;
+
+	repo_info_add_path(info, buf, repo_git_path_replace(info->repo, &path, "packed-refs"));
+	strbuf_release(&path);
+	return 0;
+}
+
+static int get_path_refs_directory(struct repo_info *info, struct strbuf *buf)
+{
+	struct strbuf path = STRBUF_INIT;
+
+	repo_info_add_path(info, buf, repo_git_path_replace(info->repo, &path, "refs"));
+	strbuf_release(&path);
+	return 0;
+}
+
+static int get_path_shallow_file(struct repo_info *info, struct strbuf *buf)
+{
+	struct strbuf path = STRBUF_INIT;
+
+	repo_info_add_path(info, buf, repo_git_path_replace(info->repo, &path, "shallow"));
+	strbuf_release(&path);
+	return 0;
+}
+
+static int get_path_superproject_working_tree(struct repo_info *info,
+					     struct strbuf *buf)
+{
+	struct strbuf superproject = STRBUF_INIT;
+
+	if (get_superproject_working_tree(&superproject))
+		repo_info_add_path(info, buf, superproject.buf);
+
+	strbuf_release(&superproject);
+	return 0;
+}
+
+static int get_path_toplevel(struct repo_info *info, struct strbuf *buf)
+{
+	const char *work_tree = repo_get_work_tree(info->repo);
+
+	if (work_tree)
+		repo_info_add_path(info, buf, work_tree);
+
+	return 0;
+}
+
 static int get_references_format(struct repo_info *info, struct strbuf *buf)
 {
 	struct repository *repo = info->repo;
@@ -74,6 +197,20 @@ static const struct field repo_info_fields[] = {
 	{ "layout.bare", get_layout_bare },
 	{ "layout.shallow", get_layout_shallow },
 	{ "object.format", get_object_format },
+	{ "path.common-dir", get_path_common_dir },
+	{ "path.config-file", get_path_config_file },
+	{ "path.git-dir", get_path_git_dir },
+	{ "path.git-prefix", get_path_git_prefix },
+	{ "path.grafts-file", get_path_grafts_file },
+	{ "path.hooks-directory", get_path_hooks_directory },
+	{ "path.index-file", get_path_index_file },
+	{ "path.logs-directory", get_path_logs_directory },
+	{ "path.objects-directory", get_path_objects_directory },
+	{ "path.packed-refs-file", get_path_packed_refs_file },
+	{ "path.refs-directory", get_path_refs_directory },
+	{ "path.shallow-file", get_path_shallow_file },
+	{ "path.superproject-working-tree", get_path_superproject_working_tree },
+	{ "path.toplevel", get_path_toplevel },
 	{ "references.format", get_references_format },
 };