Provided by: devscripts_2.18.4ubuntu1_amd64
debrepro - reproducibility tester for Debian packages
debrepro [OPTIONS] [SOURCEDIR]
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.
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.
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)).
-s VARIATION, --skip VARIATION Don't perform the named VARIATION. Variation names are the ones used in their description in section SUPPORTED VARIATIONS. -b COMMAND, --before-second-build COMMAND Run COMMAND before performing the second build. This can be used for example to apply a patch to a source tree for the second build, and check whether (or how) the resulting binaries are affected. Examples: $ debrepro --before-second-build "git checkout branch-with-changes" $ debrepro --before-second-build "patch -p1 < /path/to/patch" -h, --help Display this help message and exit.
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.
diffoscope (1), disorderfs (1),
Antonio Terceiro <firstname.lastname@example.org>.