Re: Undo function or history log

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+From: David Bremner <david@tethera.net>\r
+To: sfischme@uwaterloo.ca, notmuch <notmuch@notmuchmail.org>\r
+Subject: Re: Undo function or history log\r
+In-Reply-To: <87twyywwcp.fsf@uwaterloo.ca>\r
+References: <87twyywwcp.fsf@uwaterloo.ca>\r
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+Date: Sat, 07 Feb 2015 10:06:42 -0400\r
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+\r
+Sebastian Fischmeister <sfischme@uwaterloo.ca> writes:\r
+\r
+> I very much appreciate the ability to have simple shortcuts set tags,\r
+> refresh the view, etc. Unfortunately, sometimes, things happen\r
+> accidentally --- think of the cat walking on the keyboard --- and\r
+> consequently somethings might get lost due to wrong tags.\r
+\r
+Hi Sebastian;\r
+\r
+We tossed around some ideas based on\r
+\r
+   id:1413181203-1676-1-git-send-email-aclements@csail.mit.edu\r
+\r
+for some kind of analogue of "git reflog". I think at a basic level this\r
+would not be too hard, but without some more work I think it would\r
+mainly be useful for "last hope disaster recovery", something like\r
+"notmuch restore mtime:-10min".  The main problem I know of is that from\r
+the user's point of view, several writers can change the database\r
+"concurrently". In particular you can imagine scenarios involving\r
+"notmuch new" running in a cron and undoing more than you intended.\r
+\r
+d\r