mailinfo: allow squelching quoted CRLF warning

In previous change, Git starts to warn for quoted CRLF in decoded
base64/QP email. Despite those warnings are usually helpful,
quoted CRLF could be part of some users' workflow.

Let's give them an option to turn off the warning completely.

Signed-off-by: Đoàn Trần Công Danh <congdanhqx@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 19 insertions, 1 deletions

diff --git a/mailinfo.c b/mailinfo.c
index c8caee4..a784552 100644
--- a/mailinfo.c
+++ b/mailinfo.c
@@ -1040,7 +1040,8 @@ static void handle_filter_flowed(struct mailinfo *mi, struct strbuf *line,
 
 static void summarize_quoted_cr(struct mailinfo *mi)
 {
-	if (mi->have_quoted_cr)
+	if (mi->have_quoted_cr &&
+	    mi->quoted_cr == quoted_cr_warn)
 		warning(_("quoted CRLF detected"));
 }
 
@@ -1220,6 +1221,17 @@ int mailinfo(struct mailinfo *mi, const char *msg, const char *patch)
 	return mi->input_error;
 }
 
+int mailinfo_parse_quoted_cr_action(const char *actionstr, int *action)
+{
+	if (!strcmp(actionstr, "nowarn"))
+		*action = quoted_cr_nowarn;
+	else if (!strcmp(actionstr, "warn"))
+		*action = quoted_cr_warn;
+	else
+		return -1;
+	return 0;
+}
+
 static int git_mailinfo_config(const char *var, const char *value, void *mi_)
 {
 	struct mailinfo *mi = mi_;
@@ -1230,6 +1242,11 @@ static int git_mailinfo_config(const char *var, const char *value, void *mi_)
 		mi->use_scissors = git_config_bool(var, value);
 		return 0;
 	}
+	if (!strcmp(var, "mailinfo.quotedcr")) {
+		if (mailinfo_parse_quoted_cr_action(value, &mi->quoted_cr) != 0)
+			return error(_("bad action '%s' for '%s'"), value, var);
+		return 0;
+	}
 	/* perhaps others here */
 	return 0;
 }
@@ -1242,6 +1259,7 @@ void setup_mailinfo(struct mailinfo *mi)
 	strbuf_init(&mi->charset, 0);
 	strbuf_init(&mi->log_message, 0);
 	strbuf_init(&mi->inbody_header_accum, 0);
+	mi->quoted_cr = quoted_cr_warn;
 	mi->header_stage = 1;
 	mi->use_inbody_headers = 1;
 	mi->content_top = mi->content;