+Overview
+--------
+
+This new release includes some enhancements to searching for messages
+by filesystem location (`folder:` and `path:` prefixes under *General*
+below). Saved searches in *Emacs* have also been enhanced to allow
+distinct search orders for each one. Another enhancement to the
+*Emacs* interface is that replies to encrypted messages are now
+encrypted, reducing the risk of unintentional information disclosure.
+The default dump output format has changed to the more robust
+`batch-tag` format. The previously deprecated parsing of single
+message mboxes has been removed. For detailed release notes, see
+below.
+
+General
+-------
+
+The `folder:` search prefix now requires an exact match
+
+ The `folder:` prefix has been changed to search for email messages
+ by the exact, case sensitive maildir or MH folder name. Wildcard
+ matching (`folder:foo*`) is no longer supported. The new behaviour
+ allows for more accurate mail folder based searches, makes it
+ possible to search for messages in the top-level folder, and should
+ lead to less surprising results than the old behaviour. Users are
+ advised to see the `notmuch-search-terms` manual page for details,
+ and review how the change affects their existing `folder:` searches.
+
+There is a new `path:` search prefix.
+
+ The new `path:` search prefix complements the `folder:` prefix. The
+ `path:` prefix searches for email messages that are in particular
+ directories within the mail store, optionally recursively using a
+ special syntax. See the `notmuch-search-terms` manual page for
+ details.
+
+Notmuch database upgrade due to `folder:` and `path:` changes
+
+ The above mentioned changes to the `folder:` prefix and the addition
+ of `path:` prefix require a Notmuch database upgrade. This will be
+ done automatically, without prompting on the next time `notmuch new`
+ is run after the upgrade. The upgrade is not reversible, and the
+ upgraded database will not be readable by older versions of
+ Notmuch. As a safeguard, a database dump will be created in the
+ `.notmuch` directory before upgrading.
+
+Library changes
+---------------
+
+Notmuch database upgrade
+
+ The libnotmuch consumers are reminded to handle database upgrades
+ properly, either by relying on running `notmuch new`, or checking
+ `notmuch_database_needs_upgrade()` and calling
+ `notmuch_database_upgrade()` as necessary. This has always been the
+ case, but in practise there have been no database upgrades in any
+ released version of Notmuch before now.
+
+Support for indexing mbox files has been dropped
+
+ There has never been proper support for mbox files containing
+ multiple messages, and the support for single-message mbox files has
+ been deprecated since Notmuch 0.15. The support has now been
+ dropped, and all mbox files will be rejected during indexing.
+
+Message header parsing changes
+
+ Notmuch previously had an internal parser for message headers. The
+ parser has now been dropped in favour of letting GMime parse both
+ the headers and the message MIME structure at the same pass. This is
+ mostly an internal change, but the GMime parser is stricter in its
+ interpretation of the headers. This may result in messages with
+ slightly malformed message headers being now rejected.
+
+Command-Line Interface
+----------------------
+
+`notmuch dump` now defaults to `batch-tag` format
+
+ The old format is still available with `--format=sup`.
+
+`notmuch new` has a --quiet option
+
+ This option suppresses the progress and summary reports.
+
+`notmuch insert` respects maildir.synchronize_flags config option
+
+ Do not synchronize tags to maildir flags in `notmuch insert` if the
+ user does not want it.
+
+The commands set consistent exit status codes on failures
+
+ The cli commands now consistently set exit status of 1 on failures,
+ except where explicitly otherwise noted. The notable expections are
+ the status codes for format version mismatches for commands that
+ support formatted output.
+
+Bug fix for checking configured new.tags for invalid tags
+
+ `notmuch new` and `notmuch insert` now check the user configured
+ new.tags for invalid tags, and refuse to apply them, similar to
+ `notmuch tag`. Invalid tags are currently the empty string and tags
+ starting with `-`.
+
+Emacs Interface
+---------------
+
+Init file
+
+ If the file pointed by new variable `notmuch-init-file` (typically
+ `~/.emacs.d/notmuch-config.el`) exists, it is loaded at the end of
+ `notmuch.el`. Users can put their personal notmuch emacs lisp based
+ configuration/customization items there instead of filling
+ `~/.emacs` with these.
+
+Changed format for saved searches
+
+ The format for `notmuch-saved-searches` has changed, but old style
+ saved searches are still supported. The new style means that a saved
+ search can store the desired sort order for the search, and it can
+ store a separate query to use for generating the count notmuch
+ shows.
+
+ The variable is fully customizable and any configuration done
+ through customize should *just work*, with the additional options
+ mentioned above. For manual customization see the documentation for
+ `notmuch-saved-searches`.
+
+ IMPORTANT: a new style notmuch-saved-searches variable will break
+ previous versions of notmuch-emacs (even search will not work); to
+ fix remove the customization for notmuch-saved-searches.
+
+ If you have a custom saved search sort function (not unsorted or
+ alphabetical) then the sort function will need to be
+ modified. Replacing (car saved-search) by (notmuch-saved-search-get
+ saved-search :name) and (cdr saved-search) by
+ (notmuch-saved-search-get saved-search :query) should be sufficient.
+
+The keys of `notmuch-tag-formats` are now regexps
+
+ Previously, the keys were literal strings. Customized settings of
+ `notmuch-tag-formats` will continue to work as before unless tags
+ contain regexp special characters like `.` or `*`.
+
+Changed tags are now shown in the buffer
+
+ Previously tag changes made in a buffer were shown immediately. In
+ some cases (particularly automatic tag changes like marking read)
+ this made it hard to see what had happened (e.g., whether the
+ message had been unread).
+
+ The changes are now shown explicitly in the buffer: by default
+ deleted tags are displayed with red strike-through and added tags
+ are displayed underlined in green (inverse video is used for deleted
+ tags if the terminal does not support strike-through).
+
+ The variables `notmuch-tag-deleted-formats` and
+ `notmuch-tag-added-formats`, which have the same syntax as
+ `notmuch-tag-formats`, allow this to be customized.
+
+ Setting `notmuch-tag-deleted-formats` to `'((".*" nil))` and
+ `notmuch-tag-added-formats` to `'((".*" tag))` will give the old
+ behavior of hiding deleted tags and showing added tags identically
+ to tags already present.
+
+Version variable
+
+ The new, build-time generated variable `notmuch-emacs-version` is used
+ to distinguish between notmuch cli and notmuch emacs versions.
+ The function `notmuch-hello-versions` (bound to 'v' in notmuch-hello
+ window) prints both notmuch cli and notmuch emacs versions in case
+ these differ from each other.
+ This is especially useful when using notmuch remotely.
+
+Ido-completing-read initialization in Emacs 23
+
+ `ido-completing-read` in Emacs 23 versions 1 through 3 freezes unless
+ it is initialized. Defadvice-based *Ido* initialization is defined
+ for these Emacs versions.
+
+Bug fix for saved searches with newlines in them
+
+ Split lines confuse `notmuch count --batch`, so we remove embedded
+ newlines before calling notmuch count.
+
+Bug fixes for sender identities
+
+ Previously, Emacs would rewrite some sender identities in unexpected
+ and undesirable ways. Now it will use identities exactly as
+ configured in `notmuch-identities`.
+
+Replies to encrypted messages will be encrypted by default
+
+ In the interest of maintaining confidentiality of communications,
+ the Notmuch Emacs interface now automatically adds the mml tag to
+ encrypt replies to encrypted messages. This should make it less
+ likely to accidentally reply to encrypted messages in plain text.
+
+Reply pushes mark before signature
+
+ We push mark and set point on reply so that the user can easily cut
+ the quoted text. The mark is now pushed before the signature, if
+ any, instead of end of buffer so the signature is preserved.
+
+Message piping uses the originating buffer's working directory
+
+ `notmuch-show-pipe-message` now uses the originating buffer's
+ current default directory instead of that of the `*notmuch-pipe*`
+ buffer's.
+
+nmbug
+-----
+
+nmbug adds a `clone` command for setting up the initial repository and
+uses `@{upstream}` instead of `FETCH_HEAD` to track upstream changes.
+
+ The `@{upstream}` change reduces ambiguity when fetching multiple
+ branches, but requires existing users update their `NMBGIT`
+ repository (usually `~/.nmbug`) to distinguish between local and
+ remote-tracking branches. The easiest way to do this is:
+
+ 1. If you have any purely local commits (i.e. they aren't in the
+ nmbug repository on nmbug.tethera.net), push them to a remote
+ repository. We'll restore them from the backup in step 4.
+ 2. Remove your `NMBGIT` repository (e.g. `mv .nmbug .nmbug.bak`).
+ 3. Use the new `clone` command to create a fresh clone:
+
+ nmbug clone http://nmbug.tethera.net/git/nmbug-tags.git
+
+ 4. If you had local commits in step 1, add a remote for that
+ repository and fetch them into the new repository.
+
+Notmuch 0.17 (2013-12-30)
+=========================
+
+Incompatible change in SHA1 computation
+---------------------------------------
+
+Previously on big endian architectures like sparc and powerpc the
+computation of SHA1 hashes was incorrect. This meant that messages
+with overlong or missing message-ids were given different computed
+message-ids than on more common little endian architectures like i386
+and amd64. If you use notmuch on a big endian architecture, you are
+strongly advised to make a backup of your tags using `notmuch dump`
+before this upgrade. You can locate the affected files using something
+like:
+
+ notmuch dump | \
+ awk '/^notmuch-sha1-[0-9a-f]{40} / \
+ {system("notmuch search --exclude=false --output=files id:" $1)}'
+
projects / notmuch / blobdiff