path: drop git_common_path() in favor of repo_common_path()

Remove `git_common_path()` in favor of the `repo_common_path()` family
of functions, which makes the implicit dependency on `the_repository` go
away.

Note that `git_common_path()` used to return a string allocated via
`get_pathname()`, which uses a rotating set of statically allocated
buffers. Consequently, callers didn't have to free the returned string.
The same isn't true for `repo_common_path()`, so we also have to add
logic to free the returned strings.

This refactoring also allows us to remove `repo_common_pathv()` from the
public interface.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/worktree.c

@@ -151,7 +151,7 @@ static int delete_git_dir(const char *id)
 	struct strbuf sb = STRBUF_INIT;
 	int ret;
 
-	strbuf_addstr(&sb, git_common_path("worktrees/%s", id));
+	repo_common_path_append(the_repository, &sb, "worktrees/%s", id);
 	ret = remove_dir_recursively(&sb, 0);
 	if (ret < 0 && errno == ENOTDIR)
 		ret = unlink(sb.buf);
@@ -1102,6 +1102,7 @@ static int lock_worktree(int ac, const char **av, const char *prefix,
 		OPT_END()
 	};
 	struct worktree **worktrees, *wt;
+	char *path;
 
 	ac = parse_options(ac, av, prefix, options, git_worktree_lock_usage, 0);
 	if (ac != 1)
@@ -1122,9 +1123,11 @@ static int lock_worktree(int ac, const char **av, const char *prefix,
 		die(_("'%s' is already locked"), av[0]);
 	}
 
-	write_file(git_common_path("worktrees/%s/locked", wt->id),
+	path = repo_common_path(the_repository, "worktrees/%s/locked", wt->id);
-		   "%s", reason);
+	write_file(path, "%s", reason);
+
 	free_worktrees(worktrees);
+	free(path);
 	return 0;
 }
 
@@ -1135,6 +1138,7 @@ static int unlock_worktree(int ac, const char **av, const char *prefix,
 		OPT_END()
 	};
 	struct worktree **worktrees, *wt;
+	char *path;
 	int ret;
 
 	ac = parse_options(ac, av, prefix, options, git_worktree_unlock_usage, 0);
@@ -1149,8 +1153,12 @@ static int unlock_worktree(int ac, const char **av, const char *prefix,
 		die(_("The main working tree cannot be locked or unlocked"));
 	if (!worktree_lock_reason(wt))
 		die(_("'%s' is not locked"), av[0]);
-	ret = unlink_or_warn(git_common_path("worktrees/%s/locked", wt->id));
+
+	path = repo_common_path(the_repository, "worktrees/%s/locked", wt->id);
+	ret = unlink_or_warn(path);
+
 	free_worktrees(worktrees);
+	free(path);
 	return ret;
 }
 

path.c

@@ -634,10 +634,10 @@ const char *repo_submodule_path_replace(struct repository *repo,
 	return buf->buf;
 }
 
-void repo_common_pathv(const struct repository *repo,
+static void repo_common_pathv(const struct repository *repo,
-		       struct strbuf *sb,
+			      struct strbuf *sb,
-		       const char *fmt,
+			      const char *fmt,
-		       va_list args)
+			      va_list args)
 {
 	strbuf_addstr(sb, repo->commondir);
 	if (sb->len && !is_dir_sep(sb->buf[sb->len - 1]))

path.h

@@ -233,29 +233,10 @@ struct strbuf *get_pathname(void);
 #  include "repository.h"
 
 /* Internal implementation details that should not be used. */
-void repo_common_pathv(const struct repository *repo,
-		       struct strbuf *buf,
-		       const char *fmt,
-		       va_list args);
 void repo_git_pathv(const struct repository *repo,
 		    const struct worktree *wt, struct strbuf *buf,
 		    const char *fmt, va_list args);
 
-/*
- * Return a statically allocated path into the main repository's
- * (the_repository) common git directory.
- */
-__attribute__((format (printf, 1, 2)))
-static inline const char *git_common_path(const char *fmt, ...)
-{
-	struct strbuf *pathname = get_pathname();
-	va_list args;
-	va_start(args, fmt);
-	repo_common_pathv(the_repository, pathname, fmt, args);
-	va_end(args);
-	return pathname->buf;
-}
-
 /*
  * Return a statically allocated path into the main repository's
  * (the_repository) git directory.

worktree.c

@@ -183,7 +183,7 @@ char *get_worktree_git_dir(const struct worktree *wt)
 	else if (!wt->id)
 		return xstrdup(repo_get_common_dir(the_repository));
 	else
-		return xstrdup(git_common_path("worktrees/%s", wt->id));
+		return repo_common_path(the_repository, "worktrees/%s", wt->id);
 }
 
 static struct worktree *find_worktree_by_suffix(struct worktree **list,
@@ -314,6 +314,7 @@ int validate_worktree(const struct worktree *wt, struct strbuf *errmsg,
 {
 	struct strbuf wt_path = STRBUF_INIT;
 	struct strbuf realpath = STRBUF_INIT;
+	struct strbuf buf = STRBUF_INIT;
 	char *path = NULL;
 	int err, ret = -1;
 
@@ -343,7 +344,7 @@ int validate_worktree(const struct worktree *wt, struct strbuf *errmsg,
 	if (!is_absolute_path(wt->path)) {
 		strbuf_addf_gently(errmsg,
 				   _("'%s' file does not contain absolute path to the working tree location"),
-				   git_common_path("worktrees/%s/gitdir", wt->id));
+				   repo_common_path_replace(the_repository, &buf, "worktrees/%s/gitdir", wt->id));
 		goto done;
 	}
 
@@ -365,14 +366,16 @@ int validate_worktree(const struct worktree *wt, struct strbuf *errmsg,
 		goto done;
 	}
 
-	strbuf_realpath(&realpath, git_common_path("worktrees/%s", wt->id), 1);
+	strbuf_realpath(&realpath, repo_common_path_replace(the_repository, &buf, "worktrees/%s", wt->id), 1);
 	ret = fspathcmp(path, realpath.buf);
 
 	if (ret)
 		strbuf_addf_gently(errmsg, _("'%s' does not point back to '%s'"),
-				   wt->path, git_common_path("worktrees/%s", wt->id));
+				   wt->path, repo_common_path_replace(the_repository, &buf,
+								      "worktrees/%s", wt->id));
 done:
 	free(path);
+	strbuf_release(&buf);
 	strbuf_release(&wt_path);
 	strbuf_release(&realpath);
 	return ret;
@@ -384,11 +387,13 @@ void update_worktree_location(struct worktree *wt, const char *path_,
 	struct strbuf path = STRBUF_INIT;
 	struct strbuf dotgit = STRBUF_INIT;
 	struct strbuf gitdir = STRBUF_INIT;
+	char *wt_gitdir;
 
 	if (is_main_worktree(wt))
 		BUG("can't relocate main worktree");
 
-	strbuf_realpath(&gitdir, git_common_path("worktrees/%s/gitdir", wt->id), 1);
+	wt_gitdir = repo_common_path(the_repository, "worktrees/%s/gitdir", wt->id);
+	strbuf_realpath(&gitdir, wt_gitdir, 1);
 	strbuf_realpath(&path, path_, 1);
 	strbuf_addf(&dotgit, "%s/.git", path.buf);
 	if (fspathcmp(wt->path, path.buf)) {
@@ -400,6 +405,7 @@ void update_worktree_location(struct worktree *wt, const char *path_,
 	strbuf_release(&path);
 	strbuf_release(&dotgit);
 	strbuf_release(&gitdir);
+	free(wt_gitdir);
 }
 
 int is_worktree_being_rebased(const struct worktree *wt,
@@ -585,6 +591,7 @@ static void repair_gitfile(struct worktree *wt,
 	struct strbuf backlink = STRBUF_INIT;
 	char *dotgit_contents = NULL;
 	const char *repair = NULL;
+	char *path = NULL;
 	int err;
 
 	/* missing worktree can't be repaired */
@@ -596,7 +603,8 @@ static void repair_gitfile(struct worktree *wt,
 		goto done;
 	}
 
-	strbuf_realpath(&repo, git_common_path("worktrees/%s", wt->id), 1);
+	path = repo_common_path(the_repository, "worktrees/%s", wt->id);
+	strbuf_realpath(&repo, path, 1);
 	strbuf_addf(&dotgit, "%s/.git", wt->path);
 	strbuf_addf(&gitdir, "%s/gitdir", repo.buf);
 	dotgit_contents = xstrdup_or_null(read_gitfile_gently(dotgit.buf, &err));
@@ -626,6 +634,7 @@ static void repair_gitfile(struct worktree *wt,
 
 done:
 	free(dotgit_contents);
+	free(path);
 	strbuf_release(&repo);
 	strbuf_release(&dotgit);
 	strbuf_release(&gitdir);
@@ -657,11 +666,13 @@ void repair_worktree_after_gitdir_move(struct worktree *wt, const char *old_path
 	struct strbuf gitdir = STRBUF_INIT;
 	struct strbuf dotgit = STRBUF_INIT;
 	int is_relative_path;
+	char *path = NULL;
 
 	if (is_main_worktree(wt))
 		goto done;
 
-	strbuf_realpath(&gitdir, git_common_path("worktrees/%s/gitdir", wt->id), 1);
+	path = repo_common_path(the_repository, "worktrees/%s/gitdir", wt->id);
+	strbuf_realpath(&gitdir, path, 1);
 
 	if (strbuf_read_file(&dotgit, gitdir.buf, 0) < 0)
 		goto done;
@@ -680,6 +691,7 @@ void repair_worktree_after_gitdir_move(struct worktree *wt, const char *old_path
 done:
 	strbuf_release(&gitdir);
 	strbuf_release(&dotgit);
+	free(path);
 }
 
 void repair_worktrees_after_gitdir_move(const char *old_path)
@@ -871,7 +883,11 @@ int should_prune_worktree(const char *id, struct strbuf *reason, char **wtpath,
 	ssize_t read_result;
 
 	*wtpath = NULL;
-	strbuf_realpath(&repo, git_common_path("worktrees/%s", id), 1);
+
+	path = repo_common_path(the_repository, "worktrees/%s", id);
+	strbuf_realpath(&repo, path, 1);
+	FREE_AND_NULL(path);
+
 	strbuf_addf(&gitdir, "%s/gitdir", repo.buf);
 	if (!is_directory(repo.buf)) {
 		strbuf_addstr(reason, _("not a valid directory"));