Apply the mailmap at HEAD to every ident

1 file changed, 33 insertions, 8 deletions

diff --git a/source/parsing.c b/source/parsing.c
index c992538..587f44d 100644
--- a/source/parsing.c
+++ b/source/parsing.c
@@ -13,6 +13,8 @@
 #include "parsing.h"
 #include "shared.h"
 
+#include <mailmap.h>
+
 static char *substr(const char *start, const char *end)
 {
 	size_t len;
@@ -29,22 +31,45 @@ static char *substr(const char *start, const char *end)
 	return buf;
 }
 
+/*
+ * The repository's mailmap, read once per request and applied to every ident
+ * a page shows. Only the blob at HEAD is read, the way git reads a bare
+ * repository, so a repository cannot point the reader at a file on the server.
+ */
+static struct string_list mailmap = STRING_LIST_INIT_DUP;
+static int mailmap_read;
+
+struct string_list *cgit_mailmap(void)
+{
+	if (!ctx.repo || !ctx.repo->enable_mailmap)
+		return NULL;
+	if (!mailmap_read) {
+		mailmap_read = 1;
+		read_mailmap_blob(the_repository, &mailmap, "HEAD:.mailmap");
+	}
+	return mailmap.nr ? &mailmap : NULL;
+}
+
 static void parse_user(const char *line, char **name, char **email, timestamp_t *date, int *tz)
 {
 	struct ident_split ident;
 	struct strbuf address = STRBUF_INIT;
-	ptrdiff_t email_len;
+	struct string_list *map;
+	const char *name_start, *mail_start;
+	size_t name_len, mail_len;
 
 	if (!split_ident_line(&ident, line, strchrnul(line, '\n') - line)) {
-		*name = substr(ident.name_begin, ident.name_end);
+		name_start = ident.name_begin;
+		name_len = ident.name_end - ident.name_begin;
+		mail_start = ident.mail_begin;
+		mail_len = ident.mail_end - ident.mail_begin;
+		map = cgit_mailmap();
+		if (map)
+			map_user(map, &mail_start, &mail_len, &name_start, &name_len);
+		*name = xmemdupz(name_start, name_len);
 
-		// Assembled rather than formatted. The length is a pointer
-		// difference, and the precision of a %.*s conversion has to be
-		// an int, which cannot hold one on a 64 bit host.
-		email_len = ident.mail_end - ident.mail_begin;
 		strbuf_addch(&address, '<');
-		if (email_len > 0)
-			strbuf_add(&address, ident.mail_begin, email_len);
+		strbuf_add(&address, mail_start, mail_len);
 		strbuf_addch(&address, '>');
 		*email = strbuf_detach(&address, NULL);