Provided by: devscripts_2.17.12ubuntu1.1_amd64 
NAME
debrepro - reproducibility tester for Debian packages
SYNOPSIS
debrepro [OPTIONS] [SOURCEDIR]
DESCRIPTION
debrepro will build a given source directory twice, with a set of variations between the first and the
second build, and compare the produced binary packages. If diffoscope is installed, it is used to compare
non-matching binaries. If disorderfs is installed, it is used during the build to inject non-determinism
in filesystem listing operations.
SOURCEDIR must be a directory containing an unpacked Debian source package. If SOURCEDIR is omitted, the
current directory is assumed.
OUTPUT DIRECTORY
At the very end of a build, debrepro will inform the location of the output directory where the build
artifacts can be found. In that directory, you will find:
$OUTPUTDIR/first
Contains the results of the first build, including a copy of the source tree, and the resulting
binary packages.
$OUTPUTDIR/first/build.sh
Contains the exact build script that was used in the first build.
$OUTPUTDIR/second
Contains the results of the second build, including a copy of the source tree, and the resulting
binary packages.
$OUTPUTDIR/second/build.sh
Contains the exact build script that was used in the second build.
Taking a diff(1) between $OUTPUTDIR/first/build.sh and $OUTPUTDIR/second/build.sh is an excellent way of
figuring out exactly what changed between the two builds.
SUPPORTED VARIATIONS
user
The $USER environment variable will contain different values between the first and second builds.
path
During the second build, a fake, non-existing directory will be appended to the $PATH environment
variable.
umask
The builds will use different umask settings.
locale
Both $LC_ALL and $LANG will be different across the two builds.
timezone
$TZ will be different across builds.
filesystem-ordering
If disorderfs is installed, both builds will be done under a disorderfs overlay directory. This will
cause filesystem listing operations to be return items in a non-deterministic order.
time
The second build will be executed 213 days, 7 hours and 13 minutes in the future with regards to the
current time (using faketime(1)).
OPTIONS
-s VARIATION, --skip VARIATION
Don't perform the named VARIATION. Variation names are the ones used in their description in section
SUPPORTED VARIATIONS.
EXIT STATUS
0 Package is reproducible.
Reproducible here means that the two builds produced the exactly the same binaries, under the set of
variations that debrepro tests. Other sources of non-determinism in builds that are not yet tested
might still affect builds in the wild.
1 Package is not reproducible.
2 The given input is not a valid Debian source package.
3 Required programs are missing.
SEE ALSO
diffoscope (1), disorderfs (1),
AUTHOR
Antonio Terceiro <terceiro@debian.org>.