[PATCH 1/3] quote: let caller reset buffer for quote_path_relative()

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

quote_path_relative() resetting output buffer is sometimes unnecessary
as the buffer has never been used, and some other times makes it
harder for the caller to use (see builtin/grep.c, the caller has to
insert a string after quote_path_relative)

Move the buffer reset back to call sites when necessary.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 The answer for Jeff's XXX in his patch, why strbuf_insert() instead
 of just adding in advance.

 builtin/clean.c    | 2 ++
 builtin/grep.c     | 2 +-
 builtin/ls-files.c | 1 +
 quote.c            | 1 -
 wt-status.c        | 1 +
 5 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/builtin/clean.c b/builtin/clean.c
index 69c1cda..ff633cc 100644
--- a/builtin/clean.c
+++ b/builtin/clean.c
@@ -149,6 +149,7 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 
 		if (S_ISDIR(st.st_mode)) {
 			strbuf_addstr(&directory, ent->name);
+			strbuf_reset(&buf);
 			qname = quote_path_relative(directory.buf, directory.len, &buf, prefix);
 			if (show_only && (remove_directories ||
 			    (matches == MATCHED_EXACTLY))) {
@@ -171,6 +172,7 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 		} else {
 			if (pathspec && !matches)
 				continue;
+			strbuf_reset(&buf);
 			qname = quote_path_relative(ent->name, -1, &buf, prefix);
 			if (show_only) {
 				printf(_("Would remove %s\n"), qname);
diff --git a/builtin/grep.c b/builtin/grep.c
index 82530a6..377c904 100644
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -376,9 +376,9 @@ static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1,
 	struct strbuf pathbuf = STRBUF_INIT;
 
 	if (opt->relative && opt->prefix_length) {
+		strbuf_add(&pathbuf, filename, tree_name_len);
 		quote_path_relative(filename + tree_name_len, -1, &pathbuf,
 				    opt->prefix);
-		strbuf_insert(&pathbuf, 0, filename, tree_name_len);
 	} else {
 		strbuf_addstr(&pathbuf, filename);
 	}
diff --git a/builtin/ls-files.c b/builtin/ls-files.c
index b5434af..1e0cae9 100644
--- a/builtin/ls-files.c
+++ b/builtin/ls-files.c
@@ -395,6 +395,7 @@ int report_path_error(const char *ps_matched, const char **pathspec, const char
 		if (found_dup)
 			continue;
 
+		strbuf_reset(&sb);
 		name = quote_path_relative(pathspec[num], -1, &sb, prefix);
 		error("pathspec '%s' did not match any file(s) known to git.",
 		      name);
diff --git a/quote.c b/quote.c
index 911229f..7e23ba9 100644
--- a/quote.c
+++ b/quote.c
@@ -381,7 +381,6 @@ char *quote_path_relative(const char *in, int len,
 {
 	struct strbuf sb = STRBUF_INIT;
 	const char *rel = path_relative(in, len, &sb, prefix, -1);
-	strbuf_reset(out);
 	quote_c_style_counted(rel, strlen(rel), out, NULL, 0);
 	strbuf_release(&sb);
 
diff --git a/wt-status.c b/wt-status.c
index 2a9658b..be8b600 100644
--- a/wt-status.c
+++ b/wt-status.c
@@ -690,6 +690,7 @@ static void wt_status_print_other(struct wt_status *s,
 		struct string_list_item *it;
 		const char *path;
 		it = &(l->items[i]);
+		strbuf_reset(&buf);
 		path = quote_path(it->string, strlen(it->string),
 				  &buf, s->prefix);
 		if (column_active(s->colopts)) {
-- 
1.7.12.1.406.g6ab07c4