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firmware-free
=============
Upstream
--------
firmware-free is based on the linux-firmware.git repository, which
does not currently make tarball (or tagged) releases. Also, most of
its contents are non-free.
git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
We set the upstream version to the date of the last commit and use
uscan to generate a tarball from upstream git. The Files-Excluded
field in 'debian/copyright' lists file patterns that should be
excluded from the tarball.
We also pull module information from Linux binary packages. To update
this information, run:
debian/bin/update-modinfo
You can optionally pass a specific kernel release string or directory
in which to look for modules.
Licences
--------
The upstream source includes the file 'WHENCE' which lists the licence
and any source code for each file. The script
'debian/bin/check_upstream.py' will warn about any files that aren't
recognised to be free based on the information in 'WHENCE' and that
haven't been excluded.
Binary package definition
-------------------------
The binary package definitions are placed under 'debian/config' and
written in a format similar to INI files, parsed using the Python
ConfigParser module
<https://docs.python.org/3/library/configparser.html>,
The [base] packages field in the top-level 'defines' file lists all
the binary package names, without the fixed prefix 'firmware-'.
For each binary package, there is a subdirectory with matching name
(again without the prefix) containing another 'defines' file with
metadata. Any non-upstream firmware files are also included in
these subdirectories.
The script 'debian/bin/check_upstream.py' will list the upstream
firmware files that are free but not assigned to any binary
package.
Required metadata:
[base] desc: Short description of related hardware, used in Description
[base] files: List of files to be included, one per line
[base] longdesc: Longer description of related hardware and drivers, used in
Description.
Optional metadata:
[base] uri: Upstream URL, used as Homepage and in copyright file. Not
needed if the contents come from linux-firmware.git.
[base] support: Set to 'initramfs-tools' if update-initramfs should be
invoked after installation
[base] replaces: Used as Replaces field
[base] conflicts: Used as Conflicts field
[base] provides: Used as Provides field
Optional per-file metadata:
[<filename>_base] desc: One-line description for this file, used in
package description
[<filename>_base] version: Verson number for this file, used in package
description
To re-generate debian/control (and other files) based on these
definitions:
1. Install the current linux-support-<kernelversion> package
2. Ensure debian/rules.defs has the right value of KERNELVERSION
3. If the 'orig.tar' archive is not yet available, retrieve it as follows:
``uscan --download-version <upstream-version>`` (<upstream-version> is f.e. ``20230210``)
To retrieve <upstream-version> programmatically, use f.e. this:
$(head -n1 debian/changelog | sed 's/.*\([[:digit:]]\{8\}\).*/\1/')
Combined that results in:
``uscan --download-version $(head -n1 debian/changelog | sed 's/.*\([[:digit:]]\{8\}\).*/\1/')``
4. Run: debian/rules orig
5. Run: debian/rules debian/control
To update the current package's changelog with the new upstream version:
1. Run: PYTHONPATH=/usr/share/linux-support-<version>/lib/python \
debian/bin/release-update /path/to/linux-firmware-repository
This will update debian/changelog with the changes added between
the commit of the current package version and the HEAD commit found in the
linux firmware repository, passed as argument.
2. Remove entries regarding firmwares files not packaged
-- Ben Hutchings <benh@debian.org>, Sun, 20 Aug 2023 18:33:40 +0200
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