[PATCH 2/4] submodule: move status parsing into function

[Calvin Wan <calvinwan@google.com>]

A future patch requires the ability to parse the output of git
status --porcelain=2. Move parsing code from is_submodule_modified to
parse_status_porcelain.

Signed-off-by: Calvin Wan <calvinwan@google.com>
---
 submodule.c | 71 +++++++++++++++++++++++++++++------------------------
 1 file changed, 39 insertions(+), 32 deletions(-)

diff --git a/submodule.c b/submodule.c
index 3fa5db3ecd..91213ba83c 100644
--- a/submodule.c
+++ b/submodule.c
@@ -1753,6 +1753,43 @@ static int commit_missing_in_sub(const struct object_id *oid, void *data)
 	return type != OBJ_COMMIT;
 }
 
+static int parse_status_porcelain(char *buf, unsigned *dirty_submodule, int ignore_untracked)
+{
+	/* regular untracked files */
+	if (buf[0] == '?')
+		*dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
+
+	if (buf[0] == 'u' ||
+		buf[0] == '1' ||
+		buf[0] == '2') {
+		/* T = line type, XY = status, SSSS = submodule state */
+		if (strlen(buf) < strlen("T XY SSSS"))
+			BUG("invalid status --porcelain=2 line %s",
+				buf);
+
+		if (buf[5] == 'S' && buf[8] == 'U')
+			/* nested untracked file */
+			*dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
+
+		if (buf[0] == 'u' ||
+			buf[0] == '2' ||
+			memcmp(buf + 5, "S..U", 4))
+			/* other change */
+			*dirty_submodule |= DIRTY_SUBMODULE_MODIFIED;
+	}
+
+	if ((*dirty_submodule & DIRTY_SUBMODULE_MODIFIED) &&
+		((*dirty_submodule & DIRTY_SUBMODULE_UNTRACKED) ||
+		ignore_untracked)) {
+		/*
+		* We're not interested in any further information from
+		* the child any more, neither output nor its exit code.
+		*/
+		return 1;
+	}
+	return 0;
+}
+
 static int fetch_finish(int retvalue, struct strbuf *err,
 			void *cb, void *task_cb)
 {
@@ -1893,39 +1930,9 @@ unsigned is_submodule_modified(const char *path, int ignore_untracked)
 
 	fp = xfdopen(cp.out, "r");
 	while (strbuf_getwholeline(&buf, fp, '\n') != EOF) {
-		/* regular untracked files */
-		if (buf.buf[0] == '?')
-			dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
-
-		if (buf.buf[0] == 'u' ||
-		    buf.buf[0] == '1' ||
-		    buf.buf[0] == '2') {
-			/* T = line type, XY = status, SSSS = submodule state */
-			if (buf.len < strlen("T XY SSSS"))
-				BUG("invalid status --porcelain=2 line %s",
-				    buf.buf);
-
-			if (buf.buf[5] == 'S' && buf.buf[8] == 'U')
-				/* nested untracked file */
-				dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
-
-			if (buf.buf[0] == 'u' ||
-			    buf.buf[0] == '2' ||
-			    memcmp(buf.buf + 5, "S..U", 4))
-				/* other change */
-				dirty_submodule |= DIRTY_SUBMODULE_MODIFIED;
-		}
-
-		if ((dirty_submodule & DIRTY_SUBMODULE_MODIFIED) &&
-		    ((dirty_submodule & DIRTY_SUBMODULE_UNTRACKED) ||
-		     ignore_untracked)) {
-			/*
-			 * We're not interested in any further information from
-			 * the child any more, neither output nor its exit code.
-			 */
-			ignore_cp_exit_code = 1;
+		ignore_cp_exit_code = parse_status_porcelain(buf.buf, &dirty_submodule, ignore_untracked);
+		if (ignore_cp_exit_code)
 			break;
-		}
 	}
 	fclose(fp);
 
-- 
2.37.3.998.g577e59143f-goog