notmuch_database_find_message_by_filename does exactly what it says.
+API changes
+
+ notmuch_database_find_message (and n_d_f_m_by_filename) now return
+ a status indicator and uses an output parameter for the
+ message. This change required changing the SONAME of libnotmuch to
+ libnotmuch.so.2
+
+Python bindings changes
+-----------------------
+
+ - Re-encode python unicode objects to utf-8 before passing back to
+ libnotmuch.
+ - Support Database().begin_atomic()/end_atomic()
+ - Support Database().find_message_by_filename()
+ NB! This needs a db opened in READ-WRITE mode currently, or it will crash
+ the python process. The is a limitation (=bug) of the underlying libnotmuch.
+ - Fixes where we would not throw NotmuchErrors when we should (Justus Winter)
+ - Update for n_d_find_message* API changes (see above).
+
+Ruby bindings changes
+---------------------
+
+ - Wrap new library functions notmuch_database_{begin,end}_atomic.
+ - Add new exception Notmuch::UnbalancedAtomicError.
+ - Rename destroy to destroy! according to Ruby naming conventions.
+ - Update for n_d_find_message* API changes (see above).
+
+Emacs improvements
+------------------
+
+ * Add gpg callback to crypto sigstatus buttons to retrieve/refresh
+ signing key.
+ * Add notmuch-show-refresh-view function (and corresponding binding)
+ to refresh the view of a notmuch-show buffer.
+
+Reply formatting cleanup
+------------------------
+
+ "notmuch reply" no longer includes notification that non-leafnode
+ MIME parts are being suppressed.
Notmuch 0.8 (2011-09-10)
========================