notmuch release 0.21 now available

[David Bremner]

Where to obtain notmuch 0.21
===========================
  http://notmuchmail.org/releases/notmuch-0.21.tar.gz

Which can be verified with:

  http://notmuchmail.org/releases/notmuch-0.21.tar.gz.sha1
  147108cde5c42f0026f593c90bd762b9fc2d4152  notmuch-0.21.tar.gz

  http://notmuchmail.org/releases/notmuch-0.21.tar.gz.sha1.asc
  (signed by David Bremner)

What's new in notmuch 0.21
=========================

General
-------

Notmuch now requires gmime >= 2.6.7. The gmime 2.4 series is no longer
supported.

Database revision tracking: `lastmod:` queries

  Each message now has a metadata revision number that increases with
  every tagging operation. See the discussion of `lastmod:` in
  `notmuch-search-terms(7)` for more information.

Date queries now support `date:<expr>..!` shorthand for
`date:<expr>..<expr>`

  You can use, for example, `date:yesterday..!` to match from the
  beginning of yesterday to the end of yesterday. For further details,
  please refer to the `notmuch-search-terms` manual page.

Notmuch database upgrade to support `lastmod:` queries

  The above mentioned `lastmod:` prefix. 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.

Build System
------------

The ruby bindings are now built as part of the main notmuch build
process. This can be disabled with the `--without-ruby` option to
configure.

Building the documentation can be disabled with the `--without-docs`
option to configure.

Skipped individual tests are no longer considered as failures.

Command Line Interface
----------------------

Database revision tracking

  Two new options were added to support revision tracking. A global
  option "--uuid" (`notmuch(1)`) was added for to detect counter
  rollover and reinitialization, and `notmuch-count(1)` gained a
  `--lastmod` option to query database revision tracking data.

The `notmuch address` command supports new deduplication schemes

  `notmuch address` has gained a new `--deduplicate` option to specify
  how the results should be deduplicated, if at all. The alternatives
  are `no` (do not deduplicate, useful for processing the results with
  external tools), `mailbox` (deduplicate based on the full, case
  sensitive name and email address), and `address` (deduplicate based
  on the case insensitive address part). See the `notmuch-address`
  manual page for further information.

Emacs Interface
---------------

`notmuch-emacs-version` is used in `User-Agent` header

  The value of recently introduced variable `notmuch-emacs-version` is
  now used as a part of `User-Agent` header when sending emails.

Removed `notmuch-version` function by renaming it to `notmuch-cli-version`

  With existing variable `notmuch-emacs-version` the accompanied
  function which retrieves the version of `notmuch-command` is
  better named as `notmuch-cli-version`.

Query input now supports completion for "is:<tag>"

New message composition mode: `notmuch-compose-mode`

  This is mainly to fix fcc handling, but may be useful for user
  customization as well.

Allow filtering of search results in `notmuch-show`

Add function to rerun current tree-view search in search mode

Bug fix for replying to encrypted messages in `notmuch-tree` mode

Allow saved searched to specify tree view rather than search view

  Applies to saved searches run from `notmuch-hello`, or by a keyboard
  shortcut (`notmuch-jump`).  Can be set in the customize interface, or
  by adding :search-type tree to the appropriate saved search plist in
  `notmuch-saved-searches`.

Increase maximum size of rendered text parts

  The variable `notmuch-show-max-text-part-size` controls the maximum
  size (in bytes) which is automatically rendered. This may make
  rendering large threads slower. To get the previous behaviour set
  this variable to 10000.

Library
-------

The use of absolute paths is now enforced when calling
`notmuch_database_{open, create}`

New function `notmuch_directory_delete` to delete directory documents

  Previously there was no way to delete directory documents from the
  database, leading to confusing results when the "ghost" directory
  document of a renamed or deleted filesystem directory was
  encountered every time the parent directory was being scanned by
  `notmuch new`. The mtime of the old directory document was also used
  if a directory by the same name was added again in the filesystem,
  potentially bypassing the scan for the directory. The issues are
  fixed by providing a library call to delete directory documents, and
  deleting the old documents in `notmuch new` on filesystem directory
  removal or rename.

Database revision tracking

  Revision tracking is supported via a new prefix "lastmod:" in the
  query parser and the new function
  `notmuch_database_get_revision`. For the latter, see `notmuch(3)`.

New status code returning API for n_query_count_{messages,threads}

Deprecated functions

  `notmuch_query_search_threads`, `notmuch_query_search_messages`,
  `notmuch_query_count_messages`, and `notmuch_query_count_threads`
  are all deprecated as of this release.  Clients are encouraged to
  transition to the `_st` variants supporting better error reporting.

nmbug-status
------------

`nmbug-status` now supports specifying the sort order for each view.

What is notmuch
===============
Notmuch is a system for indexing, searching, reading, and tagging
large collections of email messages in maildir or mh format. It uses
the Xapian library to provide fast, full-text search with a convenient
search syntax.

For more about notmuch, see http://notmuchmail.org
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