DEBREBUILD(1) User Commands DEBREBUILD(1)
NAME
debrebuild - use a buildinfo file and snapshot.d.o to recreate binary
packages
SYNOPSIS
debrebuild [options] <buildinfo>
DESCRIPTION
debrebuild <--help|-h>
Given a buildinfo file from a Debian package, generate instructions for
attempting to reproduce the binary packages built from the associated
source and build information.
OPTIONS
--help, -h
Show this help and exit
--[no-]use-tor-proxy
Whether to fetch resources via tor (socks://127.0.0.1:9050) As-
sumes "apt-transport-tor" is installed both in host + chroot
--[no-]respect-build-path
Whether to setup the build to use the Build-Path from the pro-
vided .buildinfo file.
--buildresults
Directory for the build artifacts (default: ./)
--builder=BUILDER
Which building software should be used. Possible values are
none, sbuild, mmdebstrap, dpkg and sbuild+unshare. The default
is none. See section BUILDER for details.
Note: debrebuild can parse buildinfo files with and without a GPG sig-
nature. However, the signature (if present) is discarded as debrebuild
does not support verifying it. If the authenticity or integrity of the
buildinfo files are important to you, checking these need to be done
before invoking debrebuild, for example by using dscverify.
EXAMPLES
$ debrebuild --buildresults=./artifacts --builder=mmdebstrap
hello_2.10-2_amd64.buildinfo
BUILDERS
debrebuild can use different backends to perform the actual package re-
build. The desired backend is chosen using the --builder option. The
default is "none".
none Dry-run mode. No build is performed.
sbuild Use sbuild to build the package. This requires sbuild to be
setup with schroot chroots of Debian stable distributions.
mmdebstrap
Use mmdebstrap to build the package. This requires no setup and
no superuser privileges.
dpkg Directly run apt-get and dpkg-buildpackage on the current system
without chroot. This requires root privileges.
sbuild+unshare
Use sbuild with the unshare backend. This will create the chroot
and perform the build without superuser privileges and without
any setup.
UNSHARE
Before kernel 5.10.1 or before Debian 11 (Bullseye), unprivileged user
namespaces were disabled in Debian for security reasons. Refer to De-
bian bug #898446 for details. To enable user namespaces, run:
$ sudo sysctl -w kernel.unprivileged_userns_clone=1
The sbuild+unshare builder requires and the mmdebstrap builder benefits
from having unprivileged user namespaces activated. On Ubuntu they are
enabled by default.
LIMITATIONS
Currently, the code assumes that all packages were at some point part
of Debian unstable main. This fails for packages from Debian ports,
packages from experimental as well as for locally built packages or
packages from third party repositories. Enabling support for Debian
ports and experimental is conceptually possible and only needs somebody
implementing it.
debrebuild 2.23.4+deb12u1 October 2023 DEBREBUILD(1)
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