+From f22917e0bd9347ed547e124738083d5b6889da0a Mon Sep 17 00:00:00 2001
+From: Ian Jackson <ijackson@chiark.greenend.org.uk>
+Date: Fri, 4 Nov 2016 17:41:15 +0000
+Subject: [PATCH 5/5] check-ref-format: New --stdin option
+
+Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
+---
+ Documentation/git-check-ref-format.txt | 10 ++++++++--
+ builtin/check-ref-format.c | 34 +++++++++++++++++++++++++++++++---
+ 2 files changed, 39 insertions(+), 5 deletions(-)
+
+diff --git a/Documentation/git-check-ref-format.txt b/Documentation/git-check-ref-format.txt
+index e9a2657..5a213ce 100644
+--- a/Documentation/git-check-ref-format.txt
++++ b/Documentation/git-check-ref-format.txt
+@@ -10,8 +10,9 @@ SYNOPSIS
+ [verse]
+ 'git check-ref-format' [--report-errors] [--normalize]
+ [--[no-]allow-onelevel] [--refspec-pattern]
+- <refname>
+-'git check-ref-format' [--report-errors] --branch <branchname-shorthand>
++ <refname> | --stdin
++'git check-ref-format' [--report-errors] --branch
++ <branchname-shorthand> | --stdin
+
+ DESCRIPTION
+ -----------
+@@ -109,6 +110,11 @@ OPTIONS
+ If any ref does not check OK, print a message to stderr.
+ (By default, git check-ref-format is silent.)
+
++--stdin::
++ Instead of checking on ref supplied on the command line,
++ read refs, one per line, from stdin. The exit status is
++ 0 if all the refs were OK.
++
+
+ EXAMPLES
+ --------
+diff --git a/builtin/check-ref-format.c b/builtin/check-ref-format.c
+index 559d5c2..87f52fa 100644
+--- a/builtin/check-ref-format.c
++++ b/builtin/check-ref-format.c
+@@ -76,6 +76,7 @@ static int check_one_ref_format(const char *refname)
+ int cmd_check_ref_format(int argc, const char **argv, const char *prefix)
+ {
+ int i;
++ int use_stdin = 0;
+
+ if (argc == 2 && !strcmp(argv[1], "-h"))
+ usage(builtin_check_ref_format_usage);
+@@ -93,6 +94,8 @@ int cmd_check_ref_format(int argc, const char **argv, const char *prefix)
+ check_branch = 1;
+ else if (!strcmp(argv[i], "--report-errors"))
+ report_errors = 1;
++ else if (!strcmp(argv[i], "--stdin"))
++ use_stdin = 1;
+ else
+ usage(builtin_check_ref_format_usage);
+ }
+@@ -100,8 +103,33 @@ int cmd_check_ref_format(int argc, const char **argv, const char *prefix)
+ if (check_branch && (flags || normalize))
+ usage(builtin_check_ref_format_usage);
+
+- if (! (i == argc - 1))
+- usage(builtin_check_ref_format_usage);
++ if (!use_stdin) {
++ if (! (i == argc - 1))
++ usage(builtin_check_ref_format_usage);
++
++ return check_one_ref_format(argv[i]);
++ } else {
++ char buffer[2048];
++ int worst = 0;
+
+- return check_one_ref_format(argv[i]);
++ if (! (i == argc))
++ usage(builtin_check_ref_format_usage);
++
++ while (fgets(buffer, sizeof(buffer), stdin)) {
++ char *newline = strchr(buffer, '\n');
++ if (!newline) {
++ fprintf(stderr, "%s --stdin: missing final newline or line too long\n", *argv);
++ exit(127);
++ }
++ *newline = 0;
++ int got = check_one_ref_format(buffer);
++ if (got > worst)
++ worst = got;
++ }
++ if (!feof(stdin)) {
++ perror("reading from stdin");
++ exit(127);
++ }
++ return worst;
++ }
+ }
+--
+2.10.1
+