notmuch-dump: update handling of file name argument

We permit -- as an "option processing terminator".

Currently this does not do anything useful, but we plan to add
search terms after the --.

diff --git a/notmuch-dump.c b/notmuch-dump.c
index 7e7bc177ed4995a00c993b773a6630e39a97473c..610144e07e9bb078f311da2be7a3bbf97682d4d8 100644 (file)
--- a/notmuch-dump.c
+++ b/notmuch-dump.c
@@ -26,7 +26,7 @@ notmuch_dump_command (unused (void *ctx), int argc, char *argv[])
     notmuch_config_t *config;
     notmuch_database_t *notmuch;
     notmuch_query_t *query;
-    FILE *output;
+    FILE *output = stdout;
     notmuch_messages_t *messages;
     notmuch_message_t *message;
     notmuch_tags_t *tags;
@@ -40,23 +40,28 @@ notmuch_dump_command (unused (void *ctx), int argc, char *argv[])
     if (notmuch == NULL)
        return 1;
 
-    query = notmuch_query_create (notmuch, "");
-    if (query == NULL) {
-       fprintf (stderr, "Out of memory\n");
-       return 1;
-    }
-    notmuch_query_set_sort (query, NOTMUCH_SORT_MESSAGE_ID);
-
-    if (argc) {
+    if (argc && strcmp (argv[0], "--") != 0) {
        output = fopen (argv[0], "w");
        if (output == NULL) {
            fprintf (stderr, "Error opening %s for writing: %s\n",
                     argv[0], strerror (errno));
            return 1;
        }
-    } else {
-       output = stdout;
+       argc--;
+       argv++;
+    }
+
+    if (argc && strcmp (argv[0], "--") == 0){
+       argc--;
+       argv++;
+    }
+
+    query = notmuch_query_create (notmuch, "");
+    if (query == NULL) {
+       fprintf (stderr, "Out of memory\n");
+       return 1;
     }
+    notmuch_query_set_sort (query, NOTMUCH_SORT_MESSAGE_ID);
 
     for (messages = notmuch_query_search_messages (query);
         notmuch_messages_valid (messages);