mailinfo: support format=flowed
Add best-effort support for patches sent using format=flowed (RFC 3676).
Remove leading spaces ("unstuff"), remove soft line breaks (indicated
by space + newline), but leave the signature separator (dash dash space
newline) alone.
Warn in git am when encountering a format=flowed patch, because any
trailing spaces would most probably be lost, as the sending MUA is
encouraged to remove them when preparing the email.
Provide a test patch formatted by Mozilla Thunderbird 60 using its
default configuration. It reuses the contents of the file mailinfo.c
before and after this patch.
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin/am.c b/builtin/am.c
index 2fc2d1e..30c87c1 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -1243,6 +1243,10 @@ static int parse_mail(struct am_state *state, const char *mail)
fclose(mi.input);
fclose(mi.output);
+ if (mi.format_flowed)
+ warning(_("Patch sent with format=flowed; "
+ "space at the end of lines might be lost."));
+
/* Extract message and author information */
fp = xfopen(am_path(state, "info"), "r");
while (!strbuf_getline_lf(&sb, fp)) {
