shortlog: match both "Author:" and "author" on stdin

The original git-shortlog could read both the normal "git
log" output as well as "git log --format=raw". However, when
it was converted to C by b8ec592 (Build in shortlog,
2006-10-22), the trailing colon became mandatory, and we no
longer matched the raw output.

Given the amount of intervening time without any bug
reports, it's probable that nobody cares. But it's
relatively easy to fix, and the end result is hopefully more
readable than the original.

Note that this no longer matches "author: ", which we did
before, but that has never been a format generated by git.

Signed-off-by: Jeff King <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: peff

builtin/shortlog.c

@@ -94,16 +94,17 @@ static void read_from_stdin(struct shortlog *log)
 	char author[1024], oneline[1024];
 
 	while (fgets(author, sizeof(author), stdin) != NULL) {
-		if (!(author[0] == 'A' || author[0] == 'a') ||
-		    !starts_with(author + 1, "uthor: "))
+		const char *v;
+		if (!skip_prefix(author, "Author: ", &v) &&
+		    !skip_prefix(author, "author ", &v))
 			continue;
 		while (fgets(oneline, sizeof(oneline), stdin) &&
 		       oneline[0] != '\n')
 			; /* discard headers */
 		while (fgets(oneline, sizeof(oneline), stdin) &&
 		       oneline[0] == '\n')
 			; /* discard blanks */
-		insert_one_record(log, author + 8, oneline);
+		insert_one_record(log, v, oneline);
 	}
 }
 

t/t4201-shortlog.sh

@@ -120,6 +120,12 @@ test_expect_success !MINGW 'shortlog from non-git directory' '
 	test_cmp expect out
 '
 
+test_expect_success !MINGW 'shortlog can read --format=raw output' '
+	git log --format=raw HEAD >log &&
+	GIT_DIR=non-existing git shortlog -w <log >out &&
+	test_cmp expect out
+'
+
 test_expect_success 'shortlog should add newline when input line matches wraplen' '
 	cat >expect <<\EOF &&
 A U Thor (2):