[Reproducible-builds] Bug#790868: sbuild: Please allow sbuild to use a deterministic build path to build packages

[Maria Valentina Marin]

Source: sbuild
Version: 0.65.2-1
Severity: wishlist
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: toolchain buildpath

Hi,

While working on the "reproducible builds" effort [1], we have noticed
that sbuild by default uses random build directories to build packages.
This makes all packages which save the information of the build
directory unreproducible.

The attached patch allows users to specify a deterministic build path by
using the new command line option --build-path or the configuration
variable $build_path in the ~/.sbuilrc.

The new option build-path might be confused with the deprecated option
build-dir. Is there any better way to name the new option? Or is it not
confusing?

 [1]: https://wiki.debian.org/ReproducibleBuilds
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