Bug#972861: emacs: please make the generated .el files reproducible

[Chris Lamb]

Source: emacs
Version: 1:27.1+1-1
Severity: wishlist
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: buildpath
X-Debbugs-Cc: reproducible-bugs at lists.alioth.debian.org

Hi,

Whilst working on the Reproducible Builds effort [0] we noticed that
emacs is now generating .el files that do not build reproducibly.

Specifically, it adds "Generated package description from <fullpath>"
to these files that then get installed under the
/usr/share/emacs/site-lisp/elpa-src dir. This seems to be affecting
most packages that use dh-elpa.

Here's nose-el, for example:

 -;;; Generated package description from /build/1st/nose-el-0.1.1/debian/elpa-nose/usr/share/emacs/site-lisp/elpa-src/nose-0.1.1/nose.el  -*- no-byte-compile: t -*-
 +;;; Generated package description from /build/2/nose-el-0.1.1/2nd/debian/elpa-nose/usr/share/emacs/site-lisp/elpa-src/nose-0.1.1/nose.el  -*- no-byte-compile: t -*-

Patch attached that drops this particular filename; it probably isn't
very useful in a Debian package context. An alternative approach could
be to regexp it down to "nose-0.1.1/nose.el" or similar; I suppose my
patch is more of an exact clarification on the issue rather than a
request for it to be fixed in this specific way.

  [0] https://reproducible-builds.org/


Regards,

--
      ,''`.
     : :'  :     Chris Lamb
     `. `'`      lamby at debian.org / chris-lamb.co.uk
       `-
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