add "notmuch reindex" subcommand

This new subcommand takes a set of search terms, and re-indexes the
list of matching messages.

1 files changed, 134 insertions, 0 deletions

diff --git a/notmuch-reindex.c b/notmuch-reindex.c
new file mode 100644
index 00000000..44223042
--- /dev/null
+++ b/notmuch-reindex.c
@@ -0,0 +1,134 @@
+/* notmuch - Not much of an email program, (just index and search)
+ *
+ * Copyright © 2016 Daniel Kahn Gillmor
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see http://www.gnu.org/licenses/ .
+ *
+ * Author: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
+ */
+
+#include "notmuch-client.h"
+#include "string-util.h"
+
+static volatile sig_atomic_t interrupted;
+
+static void
+handle_sigint (unused (int sig))
+{
+    static char msg[] = "Stopping...         \n";
+
+    /* This write is "opportunistic", so it's okay to ignore the
+     * result.  It is not required for correctness, and if it does
+     * fail or produce a short write, we want to get out of the signal
+     * handler as quickly as possible, not retry it. */
+    IGNORE_RESULT (write (2, msg, sizeof (msg) - 1));
+    interrupted = 1;
+}
+
+/* reindex all messages matching 'query_string' using the passed-in indexopts
+ */
+static int
+reindex_query (notmuch_database_t *notmuch, const char *query_string,
+	       notmuch_param_t *indexopts)
+{
+    notmuch_query_t *query;
+    notmuch_messages_t *messages;
+    notmuch_message_t *message;
+    notmuch_status_t status;
+
+    notmuch_status_t ret = NOTMUCH_STATUS_SUCCESS;
+
+    query = notmuch_query_create (notmuch, query_string);
+    if (query == NULL) {
+	fprintf (stderr, "Out of memory.\n");
+	return 1;
+    }
+
+    /* reindexing is not interested in any special sort order */
+    notmuch_query_set_sort (query, NOTMUCH_SORT_UNSORTED);
+
+    status = notmuch_query_search_messages (query, &messages);
+    if (print_status_query ("notmuch reindex", query, status))
+	return status;
+
+    ret = notmuch_database_begin_atomic (notmuch);
+    for (;
+	 notmuch_messages_valid (messages) && ! interrupted;
+	 notmuch_messages_move_to_next (messages)) {
+	message = notmuch_messages_get (messages);
+
+	ret = notmuch_message_reindex(message, indexopts);
+	if (ret != NOTMUCH_STATUS_SUCCESS)
+	    break;
+    }
+
+    if (!ret)
+	ret = notmuch_database_end_atomic (notmuch);
+
+    notmuch_query_destroy (query);
+
+    return ret || interrupted;
+}
+
+int
+notmuch_reindex_command (notmuch_config_t *config, int argc, char *argv[])
+{
+    char *query_string = NULL;
+    notmuch_database_t *notmuch;
+    struct sigaction action;
+    int opt_index;
+    int ret;
+    notmuch_param_t *indexopts = NULL;
+
+    /* Set up our handler for SIGINT */
+    memset (&action, 0, sizeof (struct sigaction));
+    action.sa_handler = handle_sigint;
+    sigemptyset (&action.sa_mask);
+    action.sa_flags = SA_RESTART;
+    sigaction (SIGINT, &action, NULL);
+
+    notmuch_opt_desc_t options[] = {
+	{ NOTMUCH_OPT_INHERIT, (void *) &notmuch_shared_options, NULL, 0, 0 },
+	{ 0, 0, 0, 0, 0 }
+    };
+
+    opt_index = parse_arguments (argc, argv, options, 1);
+    if (opt_index < 0)
+	return EXIT_FAILURE;
+
+    notmuch_process_shared_options (argv[0]);
+
+    if (notmuch_database_open (notmuch_config_get_database_path (config),
+			       NOTMUCH_DATABASE_MODE_READ_WRITE, &notmuch))
+	return EXIT_FAILURE;
+
+    notmuch_exit_if_unmatched_db_uuid (notmuch);
+
+    query_string = query_string_from_args (config, argc-opt_index, argv+opt_index);
+    if (query_string == NULL) {
+	fprintf (stderr, "Out of memory\n");
+	return EXIT_FAILURE;
+    }
+
+    if (*query_string == '\0') {
+	fprintf (stderr, "Error: notmuch reindex requires at least one search term.\n");
+	return EXIT_FAILURE;
+    }
+    
+    ret = reindex_query (notmuch, query_string, indexopts);
+
+    notmuch_database_destroy (notmuch);
+
+    return ret || interrupted ? EXIT_FAILURE : EXIT_SUCCESS;
+}