dh_debputy(1)

NAME
dh_debputy - build Debian binary packages using debputy

SYNOPSIS
dh_debputy [debhelper options] [--destdir=directory] [-- params]

DESCRIPTION
dh_debputy is a tool for integrating debputy with debhelper as an interim solution until debputy covers enough features to be a standalone packaging tool.

The debputy toolstack can built any deb without requiring root or fakeroot. It is always possible to use Rules-Requires-Root: no with dh_debputy/debputy (given no non-debputy parts of debian/rules or the upstream build system require root).

OPTIONS

--destdir=directory
    Use this if you want the generated .deb files to be put in a directory other than the default of "..".

-- params
    Pass params to dpkg-deb(1) when it is used to build the package.

    Restrict params to compression options as the dpkg-deb options may be emulated and not all of the dpkg-deb parameters are supported.

FILES

debian/debputy.manifest
    Please see /usr/share/doc/dh-debputy/MANIFEST-FORMAT.md.gz.

    If you are converting your first package, you may want to read /usr/share/doc/dh-debputy/GETTING-STARTED-WITH-dh-debputy.md.gz first.

    Unlike most debhelper like tools, this file is per source package rather than per binary package. Therefore, you cannot use debian/package.debputy.manifest to provide a specialized manifest for package. Instead, all the needed parts should be written into the manifest itself.

ON DEB ASSEMBLY
The dh_debputy will often use dpkg-deb for assembling the output. However, there are a few cases where dpkg-deb does not have the required features for 100% rootless assembly and debputy will use a different assembly method when needed. Generally, this special-case only triggers with Rules-Requires-Root: no and when using a feature that requires root with dpkg-deb (such as static file ownership).

If you experience, that a dh_debputy produced binary via its internal assembly method that is not 100% bit-for-bit reproducible with the equivalent root + dpkg-deb built deb and that is not caused by an inaccurate manifest in your end, please file a bug. See the subsection "How to ensure the dpkg-deb assembly method is being used" for how you control which assembly method is being used.

By producing exactly the same deb as dpkg-deb would have with fakeroot, we reduce the risk of bugs or bad behaviour during installation.

Note that 100% bit-for-bit reproducible is not compared to debhelper. Packages generated by debputy may differ from those built by debhelper. As an example, auto-generated shell snippets for maintainer scripts identifies the tool that generated them and it would be wrong for debputy to identify itself as debhelper in this case. This in turn creates a minor difference between packages generated by the two tools. Consider using diffoscope to compare your debhelper generated deb to your debputy generated debs.

  How to ensure the dpkg-deb assembly method is being used
The debputy tool stack has two assembly methods: dpkg-deb and the internal debputy method.

By default, the dpkg-deb is used. The debputy tool will only switch to its internal method when:

-   The package uses a feature that requires (fake)root when assembly via dpkg-deb. At the time of writing, this is only triggered by having static ownership in the deb (paths where ownership such as root:tty is recorded directly in the data.tar), AND

-   The package does not run nor permit debputy to use (fake)root. This part comes down to Rules-Requires-Root. When set to no, debputy will automatically fallback to the internal method as necessary.

    If you would like to avoid using root during package assembly but also do not want a custom assembly method, then you can set Rules-Requires-Root: debputy/deb-assembly and debputy will always use dpkg-deb for the assembly. However, depending on your version of dpkg-dev you may run into #1036865 <https://bugs.debian.org/1036865>. In that case, you will have to choose between using classic root (Rules-Requires-Root: binary-targets) or the internal rootless assembly method.

SEE ALSO
debhelper(7)

This program integrates into the debhelper suite.

AUTHOR
Niels Thykier <niels@thykier.net>