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Date: Thu, 03 Dec 2009 09:39:32 -0400
Message-ID: <87zl60xjl7.wl%bremner@pivot.cs.unb.ca>
From: david@tethera.net
To: notmuch@notmuchmail.org
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Subject: [notmuch] hack to retag a directory
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I think this will be obsolete pretty soon when the equivalent is
built-in to notmuch, but in the mean time, here is a script that
somebody might find useful: retag a whole directory (recursively). I
don't claim it is nice in any way, but it seems usable for me, taking
about 5 seconds to retag a directory containing 1000 messages.

I use it like 

  tagdir Maildir/.list.debian-devel -inbox +debian +devel


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#!/usr/bin/perl
# Copyright © David Bremner <david@tethera.net>
# Distributed under the WTFPL <http://sam.zoy.org/wtfpl/>

# usage: $0 directory tags

use strict;

my $batchsize=200;
my $count=0;
my $dir=$ARGV[0];
shift(@ARGV);

my @tags=@ARGV;
my @msg_ids=();

open (ID, "grep -h -R '^Message-I[dD]' $dir|") || die "$!";
while(<ID>){
  chomp();
   s/[\<\>]//g;
   s/([;<>\*\|`&\$!#\(\)\[\]\{\}:'"])/\\$1/g;
   s/^Message-I[dD]: /id:/;
   push(@msg_ids,$_);
   $count++;
   if ($count>=$batchsize){
     $count=0;
     system("notmuch tag ".join(" ",@tags)." ".join(" or ", @msg_ids));
     @msg_ids=();
   }
 }
system("notmuch tag ".join(" ",@tags)." ".join(" or ", @msg_ids));


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