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| | /* notmuch - Not much of an email program, (just index and search)
*
* Copyright © 2009 Carl Worth
*
* 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: Carl Worth <cworth@cworth.org>
*/
#include "notmuch-client.h"
#include "tag-util.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;
}
static char *
_optimize_tag_query (void *ctx, const char *orig_query_string,
const tag_op_list_t *list)
{
/* This is subtler than it looks. Xapian ignores the '-' operator
* at the beginning both queries and parenthesized groups and,
* furthermore, the presence of a '-' operator at the beginning of
* a group can inhibit parsing of the previous operator. Hence,
* the user-provided query MUST appear first, but it is safe to
* parenthesize and the exclusion part of the query must not use
* the '-' operator (though the NOT operator is fine). */
char *escaped = NULL;
size_t escaped_len = 0;
char *query_string;
const char *join = "";
size_t i;
/* Don't optimize if there are no tag changes. */
if (tag_op_list_size (list) == 0)
return talloc_strdup (ctx, orig_query_string);
/* Build the new query string */
if (strcmp (orig_query_string, "*") == 0)
query_string = talloc_strdup (ctx, "(");
else
query_string = talloc_asprintf (ctx, "( %s ) and (", orig_query_string);
for (i = 0; i < tag_op_list_size (list) && query_string; i++) {
/* XXX in case of OOM, query_string will be deallocated when
* ctx is, which might be at shutdown */
if (make_boolean_term (ctx,
"tag", tag_op_list_tag (list, i),
&escaped, &escaped_len))
return NULL;
query_string = talloc_asprintf_append_buffer (
query_string, "%s%s%s", join,
tag_op_list_isremove (list, i) ? "" : "not ",
escaped);
join = " or ";
}
if (query_string)
query_string = talloc_strdup_append_buffer (query_string, ")");
talloc_free (escaped);
return query_string;
}
/* Tag messages matching 'query_string' according to 'tag_ops'
*/
static int
tag_query (void *ctx, notmuch_database_t *notmuch, const char *query_string,
tag_op_list_t *tag_ops, tag_op_flag_t flags)
{
notmuch_query_t *query;
notmuch_messages_t *messages;
notmuch_message_t *message;
/* Optimize the query so it excludes messages that already have
* the specified set of tags. */
query_string = _optimize_tag_query (ctx, query_string, tag_ops);
if (query_string == NULL) {
fprintf (stderr, "Out of memory.\n");
return 1;
}
query = notmuch_query_create (notmuch, query_string);
if (query == NULL) {
fprintf (stderr, "Out of memory.\n");
return 1;
}
/* tagging is not interested in any special sort order */
notmuch_query_set_sort (query, NOTMUCH_SORT_UNSORTED);
for (messages = notmuch_query_search_messages (query);
notmuch_messages_valid (messages) && ! interrupted;
notmuch_messages_move_to_next (messages)) {
message = notmuch_messages_get (messages);
tag_op_list_apply (message, tag_ops, flags | TAG_FLAG_PRE_OPTIMIZED);
notmuch_message_destroy (message);
}
notmuch_query_destroy (query);
return interrupted;
}
int
notmuch_tag_command (void *ctx, int argc, char *argv[])
{
tag_op_list_t *tag_ops = NULL;
char *query_string = NULL;
notmuch_config_t *config;
notmuch_database_t *notmuch;
struct sigaction action;
tag_op_flag_t tag_flags = TAG_FLAG_NONE;
int ret = 0;
/* Setup 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);
tag_ops = tag_op_list_create (ctx);
if (tag_ops == NULL) {
fprintf (stderr, "Out of memory.\n");
return 1;
}
if (parse_tag_command_line (ctx, argc - 1, argv + 1,
&query_string, tag_ops))
return 1;
config = notmuch_config_open (ctx, NULL, NULL);
if (config == NULL)
return 1;
if (notmuch_database_open (notmuch_config_get_database_path (config),
NOTMUCH_DATABASE_MODE_READ_WRITE, ¬much))
return 1;
if (notmuch_config_get_maildir_synchronize_flags (config))
tag_flags |= TAG_FLAG_MAILDIR_SYNC;
ret = tag_query (ctx, notmuch, query_string, tag_ops, tag_flags);
notmuch_database_destroy (notmuch);
return ret;
}
|