git-commit --amend: allow empty commit.

diff --git a/hash-object.c b/hash-object.c
index 62279368b832046f3e5d6136cc6560dfa7771fef..6502b5b3d1307a4cd7e8761c96aa7ecd5e70559f 100644 (file)
--- a/hash-object.c
+++ b/hash-object.c
@@ -21,8 +21,16 @@ static void hash_object(const char *path, const char *type, int write_object)
        printf("%s\n", sha1_to_hex(sha1));
 }
 
+static void hash_stdin(const char *type, int write_object)
+{
+       unsigned char sha1[20];
+       if (index_pipe(sha1, 0, type, write_object))
+               die("Unable to add stdin to database");
+       printf("%s\n", sha1_to_hex(sha1));
+}
+
 static const char hash_object_usage[] =
-"git-hash-object [-t <type>] [-w] <file>...";
+"git-hash-object [-t <type>] [-w] [--stdin] <file>...";
 
 int main(int argc, char **argv)
 {
@@ -53,9 +61,12 @@ int main(int argc, char **argv)
                        }
                        else if (!strcmp(argv[i], "--help"))
                                usage(hash_object_usage);
+                       else if (!strcmp(argv[i], "--stdin")) {
+                               hash_stdin(type, write_object);
+                       }
                        else
                                die(hash_object_usage);
-               }
+               } 
                else {
                        const char *arg = argv[i];
                        if (0 <= prefix_length)