+const char **
+notmuch_config_get_auto_exclude_tags (notmuch_config_t *config, size_t *length);
+
+void
+notmuch_config_set_auto_exclude_tags (notmuch_config_t *config,
+ const char *list[],
+ size_t length);
+
+int
+notmuch_run_hook (const char *db_path, const char *hook);
+
+notmuch_bool_t
+debugger_is_active (void);
+
+/* mime-node.c */
+
+/* mime_node_t represents a single node in a MIME tree. A MIME tree
+ * abstracts the different ways of traversing different types of MIME
+ * parts, allowing a MIME message to be viewed as a generic tree of
+ * parts. Message-type parts have one child, multipart-type parts
+ * have multiple children, and leaf parts have zero children.
+ */
+typedef struct mime_node {
+ /* The MIME object of this part. This will be a GMimeMessage,
+ * GMimePart, GMimeMultipart, or a subclass of one of these.
+ *
+ * This will never be a GMimeMessagePart because GMimeMessagePart
+ * is structurally redundant with GMimeMessage. If this part is a
+ * message (that is, 'part' is a GMimeMessage), then either
+ * envelope_file will be set to a notmuch_message_t (for top-level
+ * messages) or envelope_part will be set to a GMimeMessagePart
+ * (for embedded message parts).
+ */
+ GMimeObject *part;
+
+ /* If part is a GMimeMessage, these record the envelope of the
+ * message: either a notmuch_message_t representing a top-level
+ * message, or a GMimeMessagePart representing a MIME part
+ * containing a message.
+ */
+ notmuch_message_t *envelope_file;
+ GMimeMessagePart *envelope_part;
+
+ /* The number of children of this part. */
+ int nchildren;
+
+ /* True if decryption of this part was attempted. */
+ notmuch_bool_t decrypt_attempted;
+ /* True if decryption of this part's child succeeded. In this
+ * case, the decrypted part is substituted for the second child of
+ * this part (which would usually be the encrypted data). */
+ notmuch_bool_t decrypt_success;
+
+ /* True if signature verification on this part was attempted. */
+ notmuch_bool_t verify_attempted;
+ /* For signed or encrypted containers, the validity of the
+ * signature. May be NULL if signature verification failed. If
+ * there are simply no signatures, this will be non-NULL with an
+ * empty signers list. */
+ const GMimeSignatureValidity *sig_validity;
+
+ /* Internal: Context inherited from the root iterator. */
+ struct mime_node_context *ctx;
+
+ /* Internal: For successfully decrypted multipart parts, the
+ * decrypted part to substitute for the second child. */
+ GMimeObject *decrypted_child;
+} mime_node_t;
+
+/* Construct a new MIME node pointing to the root message part of
+ * message. If cryptoctx is non-NULL, it will be used to verify
+ * signatures on any child parts. If decrypt is true, then cryptoctx
+ * will additionally be used to decrypt any encrypted child parts.
+ *
+ * Return value:
+ *
+ * NOTMUCH_STATUS_SUCCESS: Root node is returned in *node_out.
+ *
+ * NOTMUCH_STATUS_FILE_ERROR: Failed to open message file.
+ *
+ * NOTMUCH_STATUS_OUT_OF_MEMORY: Out of memory.
+ */