From b1edb40f255a900154a9e7d34dcb9e0219427bd9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ren=C3=A9=20Scharfe?= <l.s.r@web.de>
Date: Thu, 26 Jan 2017 18:47:45 +0100
Subject: abspath: add absolute_pathdup()

Add a function that returns a buffer containing the absolute path of its
argument and a semantic patch for its intended use.  It avoids an extra
string copy to a static buffer.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/abspath.c b/abspath.c
index 2825de8..af82abd 100644
--- a/abspath.c
+++ b/abspath.c
@@ -152,6 +152,13 @@ const char *absolute_path(const char *path)
 	return sb.buf;
 }
 
+char *absolute_pathdup(const char *path)
+{
+	struct strbuf sb = STRBUF_INIT;
+	strbuf_add_absolute_path(&sb, path);
+	return strbuf_detach(&sb, NULL);
+}
+
 /*
  * Unlike prefix_path, this should be used if the named file does
  * not have to interact with index entry; i.e. name of a random file
diff --git a/cache.h b/cache.h
index 1ec9021..f481e61 100644
--- a/cache.h
+++ b/cache.h
@@ -1033,6 +1033,7 @@ int is_directory(const char *);
 const char *real_path(const char *path);
 const char *real_path_if_valid(const char *path);
 const char *absolute_path(const char *path);
+char *absolute_pathdup(const char *path);
 const char *remove_leading_path(const char *in, const char *prefix);
 const char *relative_path(const char *in, const char *prefix, struct strbuf *sb);
 int normalize_path_copy_len(char *dst, const char *src, int *prefix_len);
diff --git a/contrib/coccinelle/xstrdup_or_null.cocci b/contrib/coccinelle/xstrdup_or_null.cocci
index 3fceef1..8e05d1c 100644
--- a/contrib/coccinelle/xstrdup_or_null.cocci
+++ b/contrib/coccinelle/xstrdup_or_null.cocci
@@ -5,3 +5,9 @@ expression V;
 - if (E)
 -    V = xstrdup(E);
 + V = xstrdup_or_null(E);
+
+@@
+expression E;
+@@
+- xstrdup(absolute_path(E))
++ absolute_pathdup(E)
-- 
cgit v0.10.2-6-g49f6


From 0aaad415bcbdd7ccdfbb27eafb2f5926540455fa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ren=C3=A9=20Scharfe?= <l.s.r@web.de>
Date: Thu, 26 Jan 2017 18:54:23 +0100
Subject: use absolute_pathdup()

Apply the semantic patch for converting callers that duplicate the
result of absolute_path() to call absolute_pathdup() instead, which
avoids an extra string copy to a static buffer.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/clone.c b/builtin/clone.c
index a35d622..e4c1b32 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -161,7 +161,7 @@ static char *get_repo_path(const char *repo, int *is_bundle)
 
 	strbuf_addstr(&path, repo);
 	raw = get_repo_path_1(&path, is_bundle);
-	canon = raw ? xstrdup(absolute_path(raw)) : NULL;
+	canon = raw ? absolute_pathdup(raw) : NULL;
 	strbuf_release(&path);
 	return canon;
 }
@@ -892,7 +892,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 
 	path = get_repo_path(repo_name, &is_bundle);
 	if (path)
-		repo = xstrdup(absolute_path(repo_name));
+		repo = absolute_pathdup(repo_name);
 	else if (!strchr(repo_name, ':'))
 		die(_("repository '%s' does not exist"), repo_name);
 	else
diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index dbe5699..c80f113 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -515,7 +515,7 @@ static int module_clone(int argc, const char **argv, const char *prefix)
 				   module_clone_options);
 
 	strbuf_addf(&sb, "%s/modules/%s", get_git_dir(), name);
-	sm_gitdir = xstrdup(absolute_path(sb.buf));
+	sm_gitdir = absolute_pathdup(sb.buf);
 	strbuf_reset(&sb);
 
 	if (!is_absolute_path(path)) {
diff --git a/worktree.c b/worktree.c
index f7869f8..8b8097a 100644
--- a/worktree.c
+++ b/worktree.c
@@ -158,7 +158,7 @@ done:
 
 static void mark_current_worktree(struct worktree **worktrees)
 {
-	char *git_dir = xstrdup(absolute_path(get_git_dir()));
+	char *git_dir = absolute_pathdup(get_git_dir());
 	int i;
 
 	for (i = 0; worktrees[i]; i++) {
-- 
cgit v0.10.2-6-g49f6