debrepro (1)
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NAME
debrepro - reproduciblity tester for Debian packagesSYNOPSIS
debrepro [OPTIONS
] [SOURCEDIR
]
DESCRIPTION
debrepro will build a given source directory twice, with a set of variation between the first and the second build, and compare the binary packages produced. 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. The contents of this directory are as follows:- $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, unexisting 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.
OPTIONS
- -s VARIATION,--skipVARIATION
-
Don't perform the named VARIATION.Variation names are the ones used in their description in sectionSUPPORTED 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.