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Re: policy around 'wontfix' bug tag




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On Mon, Feb 05, 2018 at 09:44:43AM -0500, The Wanderer wrote:
> On 2018-02-05 at 09:32, David Wright wrote:

[...]

> > :0 Wh: $HOME/msgid.lock
> > | formail -D 199999 $HOME/msgid.cache
> > 
> > I used it for years.
> 
> I don't parse this well enough to understand what it would do, and I
> don't know where to find a procmail reference which would let me read up
> on it easily enough to understand quickly. Could you clarify?

The trick is in formail (contained in the package procmail). Formail is
a pretty generic mail parser which can be used to filter mails (or parts
of mails) according to different criteria. Option -D instructs it to set
up a Message-ID cache to drop duplicate mails (duplicate in the sense of
Message-ID, that is). The number after the -D limits the cache's length.

As a careful guy, I have this:

  :0 Whc: msgid.lock
  | formail -D 8192 ~/.procmail/msgid.cache
  
  :0 a:
  duplicates

The 'c' in the first recipe lets a copy "pass through". The second
rule triggers on successful execution of the first one (i.e. a cache
hit, "this was a duplicate") and drops the duplicate into the mailbox
duplicates, where I can check whether something went wrong. Needless
to say, I haven't had to check in the last ten years, but disk space
is cheap :)

Cheers
- -- tomás
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