[PATCH 3/8] submodule.c: convert is_submodule_modified to use strbuf_getwholeline_fd

[Stefan Beller <sbeller@xxxxxxxxxx>]

Instead of implementing line reading yet again, make use of our beautiful
library functions.

Signed-off-by: Stefan Beller <sbeller@xxxxxxxxxx>
---
 submodule.c | 14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

diff --git a/submodule.c b/submodule.c
index dc61ca7103..f01e84faff 100644
--- a/submodule.c
+++ b/submodule.c
@@ -1041,11 +1041,9 @@ int fetch_populated_submodules(const struct argv_array *options,
 
 unsigned is_submodule_modified(const char *path, int ignore_untracked)
 {
-	ssize_t len;
 	struct child_process cp = CHILD_PROCESS_INIT;
 	struct strbuf buf = STRBUF_INIT;
 	unsigned dirty_submodule = 0;
-	const char *line, *next_line;
 	const char *git_dir;
 
 	strbuf_addf(&buf, "%s/.git", path);
@@ -1072,10 +1070,8 @@ unsigned is_submodule_modified(const char *path, int ignore_untracked)
 	if (start_command(&cp))
 		die("Could not run 'git status --porcelain' in submodule %s", path);
 
-	len = strbuf_read(&buf, cp.out, 1024);
-	line = buf.buf;
-	while (len > 2) {
-		if ((line[0] == '?') && (line[1] == '?')) {
+	while (strbuf_getwholeline_fd(&buf, cp.out, '\n') != EOF) {
+		if ((buf.buf[0] == '?') && (buf.buf[1] == '?')) {
 			dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
 			if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
 				break;
@@ -1085,12 +1081,6 @@ unsigned is_submodule_modified(const char *path, int ignore_untracked)
 			    (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED))
 				break;
 		}
-		next_line = strchr(line, '\n');
-		if (!next_line)
-			break;
-		next_line++;
-		len -= (next_line - line);
-		line = next_line;
 	}
 	close(cp.out);
 
-- 
2.12.1.438.gb674c4c09c