trailer: forbid leading whitespace in trailers

Currently, interpret-trailers allows leading whitespace in trailer lines. This leads to false positives, especially for quoted lines or bullet lists. Forbid leading whitespace in trailers. Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Jonathan Tan committed Oct 21, 2016 at 10:55 UTC c463a6b28023dd3ad7ad4542147e20c27dbc83d6
3 files changed +17 -2
Documentation/git-interpret-trailers.txt
+1 -1
@@ -55,7 +55,7 @@ The group must either be at the end of the message or be the last
55 non-whitespace lines before a line that starts with '---'. Such three
56 minus signs start the patch part of the message.
57
58 -When reading trailers, there can be whitespaces before and after the
58 +When reading trailers, there can be whitespaces after the
59 token, the separator and the value. There can also be whitespaces
60 inside the token and the value.
61
t/t7513-interpret-trailers.sh
+15
@@ -241,6 +241,21 @@ test_expect_success 'with non-trailer lines only' '
241 test_cmp expected actual
242 '
243
244 +test_expect_success 'line with leading whitespace is not trailer' '
245 + q_to_tab >patch <<-\EOF &&
246 +
247 + Qtoken: value
248 + EOF
249 + q_to_tab >expected <<-\EOF &&
250 +
251 + Qtoken: value
252 +
253 + token: value
254 + EOF
255 + git interpret-trailers --trailer "token: value" patch >actual &&
256 + test_cmp expected actual
257 +'
258 +
259 test_expect_success 'with config setup' '
260 git config trailer.ack.key "Acked-by: " &&
261 cat >expected <<-\EOF &&
trailer.c
+1 -1
@@ -775,7 +775,7 @@ static int find_trailer_start(struct strbuf **lines, int count)
775 }
776
777 separator_pos = find_separator(lines[start]->buf);
778 - if (separator_pos >= 1) {
778 + if (separator_pos >= 1 && !isspace(lines[start]->buf[0])) {
779 struct list_head *pos;
780
781 trailer_lines++;