+#if HAVE_XAPIAN_COMPACT
+static int unlink_cb (const char *path,
+ unused (const struct stat *sb),
+ unused (int type),
+ unused (struct FTW *ftw))
+{
+ return remove(path);
+}
+
+static int rmtree (const char *path)
+{
+ return nftw(path, unlink_cb, 64, FTW_DEPTH | FTW_PHYS);
+}
+
+class NotmuchCompactor : public Xapian::Compactor
+{
+ notmuch_compact_status_cb_t status_cb;
+
+public:
+ NotmuchCompactor(notmuch_compact_status_cb_t cb) : status_cb(cb) { }
+
+ virtual void
+ set_status (const std::string &table, const std::string &status)
+ {
+ char* msg;
+
+ if (status_cb == NULL)
+ return;
+
+ if (status.length() == 0)
+ msg = talloc_asprintf (NULL, "compacting table %s", table.c_str());
+ else
+ msg = talloc_asprintf (NULL, " %s", status.c_str());
+
+ if (msg == NULL) {
+ return;
+ }
+
+ status_cb(msg);
+ talloc_free(msg);
+ }
+};
+
+/* Compacts the given database, optionally saving the original database
+ * in backup_path. Additionally, a callback function can be provided to
+ * give the user feedback on the progress of the (likely long-lived)
+ * compaction process.
+ *
+ * The backup path must point to a directory on the same volume as the
+ * original database. Passing a NULL backup_path will result in the
+ * uncompacted database being deleted after compaction has finished.
+ * Note that the database write lock will be held during the
+ * compaction process to protect data integrity.
+ */
+notmuch_status_t
+notmuch_database_compact (const char* path,
+ const char* backup_path,
+ notmuch_compact_status_cb_t status_cb)
+{
+ void *local = talloc_new (NULL);
+ NotmuchCompactor compactor(status_cb);
+ char *notmuch_path, *xapian_path, *compact_xapian_path;
+ char *old_xapian_path = NULL;
+ notmuch_status_t ret = NOTMUCH_STATUS_SUCCESS;
+ notmuch_database_t *notmuch = NULL;
+ struct stat statbuf;
+
+ ret = notmuch_database_open(path, NOTMUCH_DATABASE_MODE_READ_WRITE, ¬much);
+ if (ret) {
+ goto DONE;
+ }
+
+ if (! (notmuch_path = talloc_asprintf (local, "%s/%s", path, ".notmuch"))) {
+ ret = NOTMUCH_STATUS_OUT_OF_MEMORY;
+ goto DONE;
+ }
+
+ if (! (xapian_path = talloc_asprintf (local, "%s/%s", notmuch_path, "xapian"))) {
+ ret = NOTMUCH_STATUS_OUT_OF_MEMORY;
+ goto DONE;
+ }
+
+ if (! (compact_xapian_path = talloc_asprintf (local, "%s.compact", xapian_path))) {
+ ret = NOTMUCH_STATUS_OUT_OF_MEMORY;
+ goto DONE;
+ }
+
+ if (backup_path != NULL) {
+ if (! (old_xapian_path = talloc_asprintf (local, "%s/xapian.old", backup_path))) {
+ ret = NOTMUCH_STATUS_OUT_OF_MEMORY;
+ goto DONE;
+ }
+
+ if (stat(old_xapian_path, &statbuf) != -1) {
+ fprintf (stderr, "Backup path already exists: %s\n", old_xapian_path);
+ ret = NOTMUCH_STATUS_FILE_ERROR;
+ goto DONE;
+ }
+ if (errno != ENOENT) {
+ fprintf (stderr, "Unknown error while stat()ing backup path: %s\n",
+ strerror(errno));
+ goto DONE;
+ }
+ }
+
+ try {
+ compactor.set_renumber(false);
+ compactor.add_source(xapian_path);
+ compactor.set_destdir(compact_xapian_path);
+ compactor.compact();
+ } catch (Xapian::InvalidArgumentError e) {
+ fprintf (stderr, "Error while compacting: %s\n", e.get_msg().c_str());
+ ret = NOTMUCH_STATUS_XAPIAN_EXCEPTION;
+ goto DONE;
+ }
+
+ if (old_xapian_path != NULL) {
+ if (rename(xapian_path, old_xapian_path)) {
+ fprintf (stderr, "Error moving old database out of the way\n");
+ ret = NOTMUCH_STATUS_FILE_ERROR;
+ goto DONE;
+ }
+ } else {
+ rmtree(xapian_path);
+ }
+
+ if (rename(compact_xapian_path, xapian_path)) {
+ fprintf (stderr, "Error moving compacted database\n");
+ ret = NOTMUCH_STATUS_FILE_ERROR;
+ goto DONE;
+ }
+
+ notmuch_database_close(notmuch);
+
+DONE:
+ talloc_free(local);
+ return ret;
+}
+#else
+notmuch_status_t
+notmuch_database_compact_close (unused (notmuch_database_t *notmuch))
+{
+ fprintf (stderr, "notmuch was compiled against a xapian version lacking compaction support.\n");
+ return NOTMUCH_STATUS_UNSUPPORTED_OPERATION;
+}
+#endif
+
projects / notmuch / commitdiff