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** [issues:#5328] mf2pt1 uses random uniqueID**
**Status:** New
**Labels:** reproducible
**Created:** Wed May 23, 2018 02:13 PM UTC by Bernhard M. Wiedemann
**Last Updated:** Wed May 23, 2018 02:13 PM UTC
**Owner:** nobody
**Attachments:**
-
[reproducible.patch](https://sourceforge.net/p/testlilyissues/issues/5328/attachment/reproducible.patch)
(1.4 kB; text/x-patch)
`scripts/build/mf2pt1.pl` calls `int(rand(1000000)) + 4000000`
so with every (clean) build, a new uniqueID value gets generated, which
prevents lilypond packages from building reproducibly.
See also https://reproducible-builds.org/ for why this matters.
One pretty clean solution would be to calculate a hash of all relevant inputs
and use that for uniqueID.
Since I dont know what the inputs are there, for now I only did a dummy patch
that hashed the filename...
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