Merge branch 'ow/stash-count-in-status-porcelain-output'

Allow "git status --porcelain=v2" to show the number of stash
entries with --show-stash like the normal output does.

* ow/stash-count-in-status-porcelain-output:
  status: print stash info with --porcelain=v2 --show-stash
  status: count stash entries in separate function

Documentation/git-status.txt

@@ -314,6 +314,14 @@ Line                                     Notes
 ------------------------------------------------------------
 ....
 
+Stash Information
+^^^^^^^^^^^^^^^^^
+
+If `--show-stash` is given, one line is printed showing the number of stash
+entries if non-zero:
+
+    # stash <N>
+
 Changed Tracked Entries
 ^^^^^^^^^^^^^^^^^^^^^^^
 

t/t7064-wtstatus-pv2.sh

@@ -113,6 +113,21 @@ test_expect_success 'after first commit, create unstaged changes' '
 	test_cmp expect actual
 '
 
+test_expect_success 'after first commit, stash existing changes' '
+	cat >expect <<-EOF &&
+	# branch.oid $H0
+	# branch.head initial-branch
+	# stash 2
+	EOF
+
+	test_when_finished "git stash pop && git stash pop" &&
+
+	git stash -- file_x &&
+	git stash &&
+	git status --porcelain=v2 --branch --show-stash --untracked-files=no >actual &&
+	test_cmp expect actual
+'
+
 test_expect_success 'after first commit but omit untracked files and branch' '
 	cat >expect <<-EOF &&
 	1 .M N... 100644 100644 100644 $OID_X $OID_X file_x

wt-status.c

@@ -948,11 +948,17 @@ static int stash_count_refs(struct object_id *ooid, struct object_id *noid,
 	return 0;
 }
 
+static int count_stash_entries(void)
+{
+	int n = 0;
+	for_each_reflog_ent("refs/stash", stash_count_refs, &n);
+	return n;
+}
+
 static void wt_longstatus_print_stash_summary(struct wt_status *s)
 {
-	int stash_count = 0;
+	int stash_count = count_stash_entries();
 
-	for_each_reflog_ent("refs/stash", stash_count_refs, &stash_count);
 	if (stash_count > 0)
 		status_printf_ln(s, GIT_COLOR_NORMAL,
 				 Q_("Your stash currently has %d entry",
@@ -2176,6 +2182,18 @@ static void wt_porcelain_v2_print_tracking(struct wt_status *s)
 	}
 }
 
+/*
+ * Print the stash count in a porcelain-friendly format
+ */
+static void wt_porcelain_v2_print_stash(struct wt_status *s)
+{
+	int stash_count = count_stash_entries();
+	char eol = s->null_termination ? '\0' : '\n';
+
+	if (stash_count > 0)
+		fprintf(s->fp, "# stash %d%c", stash_count, eol);
+}
+
 /*
  * Convert various submodule status values into a
  * fixed-length string of characters in the buffer provided.
@@ -2437,6 +2455,9 @@ static void wt_porcelain_v2_print(struct wt_status *s)
 	if (s->show_branch)
 		wt_porcelain_v2_print_tracking(s);
 
+	if (s->show_stash)
+		wt_porcelain_v2_print_stash(s);
+
 	for (i = 0; i < s->change.nr; i++) {
 		it = &(s->change.items[i]);
 		d = it->util;