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Re: Tagging programs with git hash. [slightly OT]

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Malcolm McLean <malcolm.arthur.mclean@gmail.com> writes:

> Git and similar version control systems have an internal version tag,
> in git it is the sha-1 hash, which is used to identify the version
> within the control system.
>
> Now it would be nice to tag the executable with this hash, so that if a user 
> reports a bug, you can ask them to run it in a mode that displays the
> hash, then go back to the correct version in the repository to find the
> bug.
>
> But here we have a problem. The hash is created by applying a hash algorithm
> to the entire source, which is designed to change every digit of the hash
> if even a character of the source is changed. So if we add the hash to the
> source, we've changed the hash. So we can't tag an executable with its
> version number.

Theoretically, this function -- the hash of a hash-containing source --
will have a fixed point which would be the solution.  Unfortunately it
will be impossible to find!

The solution is to have the hash as data, not literal source, as DB has
suggested using a command-line macro to supply the data.

You could also patch the executable.

-- 
Ben.

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Thread

Tagging programs with git hash. [slightly OT] Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2019-05-31 07:02 -0700
  Re: Tagging programs with git hash. [slightly OT] queequeg@trust.no1 (Queequeg) - 2019-05-31 14:27 +0000
    Re: Tagging programs with git hash. [slightly OT] Mateusz Viste <mateusz@wont.tell> - 2019-05-31 16:42 +0000
      Re: Tagging programs with git hash. [slightly OT] Keith Thompson <kst-u@mib.org> - 2019-05-31 13:23 -0700
      Re: Tagging programs with git hash. [slightly OT] queequeg@trust.no1 (Queequeg) - 2019-05-31 21:10 +0000
        Re: Tagging programs with git hash. [slightly OT] Mateusz Viste <mateusz@wont.tell> - 2019-06-01 09:31 +0000
          Re: Tagging programs with git hash. [slightly OT] queequeg@trust.no1 (Queequeg) - 2019-06-01 12:39 +0000
  Re: Tagging programs with git hash. [slightly OT] David Brown <david.brown@hesbynett.no> - 2019-05-31 16:28 +0200
  Re: Tagging programs with git hash. [slightly OT] fir <profesor.fir@gmail.com> - 2019-05-31 07:51 -0700
  Re: Tagging programs with git hash. [slightly OT] Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-05-31 15:59 +0100
    Re: Tagging programs with git hash. [slightly OT] Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-05-31 22:56 +0100
      Re: Tagging programs with git hash. [slightly OT] John Forkosh <forkosh@panix.com> - 2019-06-01 02:55 +0000
        Re: Tagging programs with git hash. [slightly OT] fir <profesor.fir@gmail.com> - 2019-06-01 04:26 -0700
          Re: Tagging programs with git hash. [slightly OT] fir <profesor.fir@gmail.com> - 2019-06-01 04:35 -0700
      Re: Tagging programs with git hash. [slightly OT] Tim Rentsch <tr.17687@z991.linuxsc.com> - 2019-06-01 04:03 -0700
  Re: Tagging programs with git hash. [slightly OT] "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-05-31 13:30 -0700
  Re: Tagging programs with git hash. [slightly OT] Eli the Bearded <*@eli.users.panix.com> - 2019-05-31 21:46 +0000
  Re: Tagging programs with git hash. [slightly OT] Shuggie <shuggie@latepaul.com> - 2019-06-01 11:21 +0100
  Re: Tagging programs with git hash. [slightly OT] Ike Naar <ike@iceland.freeshell.org> - 2019-06-01 21:23 +0000
    Re: Tagging programs with git hash. [slightly OT] Keith Thompson <kst-u@mib.org> - 2019-06-01 14:34 -0700
    Re: Tagging programs with git hash. [slightly OT] Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2019-06-02 12:36 -0700
      Re: Tagging programs with git hash. [slightly OT] Keith Thompson <kst-u@mib.org> - 2019-06-02 14:35 -0700

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