mailmap: support reading mailmap from blobs

[git.git] / mailmap.c

diff --git a/mailmap.c b/mailmap.c
index 89bc318de4a537e228f3e00a173b46b16b7c4f73..2f9c69157d7fbdd5f2b578fe72c2422712d36800 100644 (file)
--- a/mailmap.c
+++ b/mailmap.c
@@ -10,6 +10,7 @@ static inline void debug_mm(const char *format, ...) {}
 #endif
 
 const char *git_mailmap_file;
+const char *git_mailmap_blob;
 
 struct mailmap_info {
        char *name;
@@ -177,12 +178,56 @@ static int read_mailmap_file(struct string_list *map, const char *filename,
        return 0;
 }
 
+static void read_mailmap_buf(struct string_list *map,
+                            const char *buf, unsigned long len,
+                            char **repo_abbrev)
+{
+       while (len) {
+               const char *end = strchrnul(buf, '\n');
+               unsigned long linelen = end - buf + 1;
+               char *line = xmemdupz(buf, linelen);
+
+               read_mailmap_line(map, line, repo_abbrev);
+
+               free(line);
+               buf += linelen;
+               len -= linelen;
+       }
+}
+
+static int read_mailmap_blob(struct string_list *map,
+                            const char *name,
+                            char **repo_abbrev)
+{
+       unsigned char sha1[20];
+       char *buf;
+       unsigned long size;
+       enum object_type type;
+
+       if (!name)
+               return 1;
+       if (get_sha1(name, sha1) < 0)
+               return 1;
+
+       buf = read_sha1_file(sha1, &type, &size);
+       if (!buf)
+               return 1;
+       if (type != OBJ_BLOB)
+               return 1;
+
+       read_mailmap_buf(map, buf, size, repo_abbrev);
+
+       free(buf);
+       return 0;
+}
+
 int read_mailmap(struct string_list *map, char **repo_abbrev)
 {
        map->strdup_strings = 1;
-       /* each failure returns 1, so >1 means both calls failed */
+       /* each failure returns 1, so >2 means all calls failed */
        return read_mailmap_file(map, ".mailmap", repo_abbrev) +
-              read_mailmap_file(map, git_mailmap_file, repo_abbrev) > 1;
+              read_mailmap_blob(map, git_mailmap_blob, repo_abbrev) +
+              read_mailmap_file(map, git_mailmap_file, repo_abbrev) > 2;
 }
 
 void clear_mailmap(struct string_list *map)