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sm-discuss - Re: [SM-Discuss] [RFC] Compressed filetype detection (Bug #16011)

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  • From: Pavel Vinogradov <vin.public AT gmail.com>
  • To: sm-discuss AT lists.ibiblio.org
  • Subject: Re: [SM-Discuss] [RFC] Compressed filetype detection (Bug #16011)
  • Date: Sat, 14 May 2016 16:00:49 -0400

$ ./compguess /var/spool/sorcery/mesalib-git.tar.xz
awk: ignoring embedded null in pattern
awk: ignoring embedded null in pattern
xz

Why extra debug info from awk?

On Sat, May 14, 2016 at 04:12:34PM -0300, Ismael Luceno wrote:
> Dear fellow mages,
>
> Bug #16011 [0], recently filled, deals with the issue of upgrading
> an old system to the latest stable releases.
>
> Since a while ago, some of the sources of spells in stable are
> compressed by xz, but this format is not recognized by older versions
> of the `file` command, which sorcery uses to figure out how to
> decompress the file.
>
> As a first measure to avoid this issue now and in future releases, I
> would like to replace the code dealing with parsing the output of the
> `file` command with a custom script that detects only the formats
> needed by sorcery, and has no external dependencies. A prototype
> written using only dd and awk is attached to the bug report [1].
>
> I would like to hear opinions about this implementation and any ideas
> about how it could be improved.
>
> Regards.
>
>
> [0] https://bugs.sourcemage.org/show_bug.cgi?id=16011
> [1] https://bugs.sourcemage.org/attachment.cgi?id=7584
> _______________________________________________
> SM-Discuss mailing list
> SM-Discuss AT lists.ibiblio.org
> http://lists.ibiblio.org/mailman/listinfo/sm-discuss

--
Sincerely,
Pavel Vinogradov

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