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+ Sun, 27 Apr 2014 07:46:19 -0700 (PDT)\r
+From: Jani Nikula <jani@nikula.org>\r
+To: notmuch@notmuchmail.org\r
+Subject: [PATCH] NEWS: folder:, path:, and database upgrade\r
+Date: Sun, 27 Apr 2014 17:46:17 +0300\r
+Message-Id: <1398609977-9943-1-git-send-email-jani@nikula.org>\r
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+\r
+Related news together.\r
+---\r
+ NEWS | 43 +++++++++++++++++++++++++++++++++++++++++++\r
+ 1 file changed, 43 insertions(+)\r
+\r
+diff --git a/NEWS b/NEWS\r
+index bcd311d4b11b..7cdcb4b3871e 100644\r
+--- a/NEWS\r
++++ b/NEWS\r
+@@ -1,6 +1,49 @@\r
+ Notmuch 0.18~rc0 (2014-04-22)\r
+ =============================\r
+ \r
++General\r
++-------\r
++\r
++The `folder:` search prefix now requires an exact match\r
++\r
++ The `folder:` prefix has been changed to search for email messages\r
++ by the exact, case sensitive maildir or MH folder name. The new\r
++ behaviour allows for more accurate mail folder based searches, and\r
++ should lead to less surprising results than the old behaviour. Users\r
++ are advised to see the `notmuch-search-terms` manual page for\r
++ details, and review how the change affects their existing `folder:`\r
++ searches.\r
++\r
++There is a new `path:` search prefix.\r
++\r
++ The new `path:` search prefix complements the `folder:` prefix. The\r
++ `path:` prefix searches for email messages that are in particular\r
++ directories within the mail store, optionally recursively using a\r
++ special syntax. See the `notmuch-search-terms` manual page for\r
++ details.\r
++\r
++Notmuch database upgrade due to `folder:` and `path:` changes\r
++\r
++ The above mentioned changes to the `folder:` prefix and the addition\r
++ of `path:` prefix require a Notmuch database upgrade. This will be\r
++ done automatically, without prompting on the next time `notmuch new`\r
++ is run after the upgrade. The upgrade is not reversible, and the\r
++ upgraded database will not be readable by older versions of\r
++ Notmuch. As a safeguard, a database dump will be created in the\r
++ `.notmuch` directory before upgrading.\r
++\r
++Library changes\r
++---------------\r
++\r
++Notmuch database upgrade\r
++\r
++ The libnotmuch consumers are reminded to handle database upgrades\r
++ properly, either by relying on running `notmuch new`, or checking\r
++ `notmuch_database_needs_upgrade()` and calling\r
++ `notmuch_database_upgrade()` as necessary. This has always been the\r
++ case, but in practise there have been no database upgrades in any\r
++ released version of Notmuch before now.\r
++\r
+ Command-Line Interface\r
+ ----------------------\r
+ \r
+-- \r
+1.9.2\r
+\r