Re: Add support for specifying tags during "notmuch new"

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+To: Austin Clements <amdragon@MIT.EDU>\r
+Subject: Re: Add support for specifying tags during "notmuch new"\r
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+From: David Edmondson <dme@dme.org>\r
+Date: Fri, 02 May 2014 16:32:50 +0100\r
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+--=-=-=\r
+Content-Type: text/plain\r
+\r
+On Fri, May 02 2014, Austin Clements wrote:\r
+>>     2) A periodic mail processing script wants to add new messages to\r
+>>        the database, then process those newly added messages to add\r
+>>        convenience tags, etc. without worrying about the user or other\r
+>>        instances of the script manipulating tags at the same time. Use\r
+>>        this approach:\r
+>>          KEY=$RANDOM\r
+>>      notmuch new +$KEY\r
+>>      notmuch tag +notmuch tag:$KEY and to:notmuch@notmuchmail.org\r
+>>      notmuch tag +gnus tag:$KEY and to:ding@gnus.org\r
+>>      ...\r
+>>      notmuch tag -$KEY tag:$KEY\r
+>\r
+> What happens when this script dies in the middle (say, your computer\r
+> loses power or notmuch tag conflicts with something else on the write\r
+> lock)?\r
+\r
+It's a problem. I think that I would actually add both 'new' and\r
+'new-$seconds' tags (given that I can't search on wildcarded tags) and\r
+have 'notmuch tag' use only 'new-$seconds'.\r
+\r
+The 'new' tag would help recover from failures such as you describe.\r
+\r
+> One advantage of the standard "new" tag approach is that it's easy to\r
+> write a stateless post-new tagging script that can be killed at any\r
+> point and restarted.  (You're right that post-new has a concurrency\r
+> issue, but we should fix that in its own right.)\r
+\r
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