Some packages require being able to redefine the compiler variables
set to add additional base arguments that must be used everywhere.
This change makes it possible for that to work correctly.
The kernel doesn't do a complete build for all arches. And example is i686 in Fedora, where only kernel-headers is built.
kernel-srpm-macros provides %kernel_arches so that the various packages have a consistent way to check for this.
A new script brp-fix-pyc-reproducibility creates an opt-in way of how to fix
problems with the reproducibility of byte-compiled Python files. The script
uses marshalparser [0] which currently doesn't provide solutions for all issues
but can fix at least problems with reference flags. For more info see
this Bugzilla [1].
If you want to use this new feature, you need to define
`%py_reproducible_pyc_path` to specify a path you want to fix `.pyc`
files in (recursively) and build-require /usr/bin/marshalparser.
if you forget to build-require the parser. The error message is:
```
+ /usr/lib/rpm/redhat/brp-python-bytecompile '' 1 0
Bytecompiling .py files below /builddir/build/BUILDROOT/tldr-0.5-2.fc33.x86_64/usr/lib/python3.9 using /usr/bin/python3.9
+ /usr/lib/rpm/redhat/brp-fix-pyc-reproducibility /builddir/build/BUILDROOT/tldr-0.5-2.fc33.x86_64
ERROR: If %py_reproducible_pyc_path is defined, you have to also BuildRequire: /usr/bin/marshalparser !
error: Bad exit status from /var/tmp/rpm-tmp.UUJr4v (%install)
```
A build fails if the parser is not able to parse any of the `.pyc` files.
And finally, if a build is properly configured it produces fixed `.pyc` files.
Currently, `.pyc` files in the tldr package contain a lot of unused reference flags:
```
$ dnf install -y tldr
$ marshalparser --unused /usr/lib/python3.9/site-packages/__pycache__/tldr.cpython-39.pyc
… long output …
190 - Flag_ref(byte=9610, type='TYPE_SHORT_ASCII_INTERNED', content=b'init', usages=0)
191 - Flag_ref(byte=9633, type='TYPE_SHORT_ASCII_INTERNED', content=b'source', usages=0)
192 - Flag_ref(byte=9651, type='TYPE_SHORT_ASCII_INTERNED', content=b'argv', usages=0)
193 - Flag_ref(byte=9657, type='TYPE_SHORT_ASCII_INTERNED', content=b'print_help', usages=0)
194 - Flag_ref(byte=9669, type='TYPE_SHORT_ASCII_INTERNED', content=b'stderr', usages=0)
195 - Flag_ref(byte=9682, type='TYPE_SHORT_ASCII_INTERNED', content=b'parse_args', usages=0)
196 - Flag_ref(byte=9737, type='TYPE_SHORT_ASCII_INTERNED', content=b'encode', usages=0)
197 - Flag_ref(byte=9782, type='TYPE_SHORT_ASCII_INTERNED', content=b'parser', usages=0)
198 - Flag_ref(byte=9790, type='TYPE_SHORT_ASCII_INTERNED', content=b'options', usages=0)
199 - Flag_ref(byte=9799, type='TYPE_SHORT_ASCII_INTERNED', content=b'rest', usages=0)
200 - Flag_ref(byte=9821, type='TYPE_SHORT_ASCII_INTERNED', content=b'result', usages=0)
202 - Flag_ref(byte=10022, type='TYPE_SHORT_ASCII_INTERNED', content=b'__main__', usages=0)
203 - Flag_ref(byte=10102, type='TYPE_SHORT_ASCII_INTERNED', content=b'argparse', usages=0)
204 - Flag_ref(byte=10433, type='TYPE_SHORT_ASCII_INTERNED', content=b'__name__', usages=0)
205 - Flag_ref(byte=10463, type='TYPE_SHORT_ASCII_INTERNED', content=b'<module>', usages=0)
```
This new feature fixes them:
```
$ marshalparser --unused /usr/lib/python3.9/site-packages/__pycache__/tldr.cpython-39.pyc
<empty output>
```
[0] https://github.com/fedora-python/marshalparser
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1686078
Remove %new_package dependency on %{source_name} when creating subpackages by
suffix. This way those subpackages still work even when the packager set
%{source_name} to a value and Name: to another.
Arguably, the packager is severily conflicted, and does not know what he wants
to achieve, but this case is easy enough to accomodate by tweaking the decision
tree. So let’s just make things work instead of blaming the packager.
Make SRPM handover between macros even more graceful and reliable by auto-creating
a basic SRPM header before attempting declaration of a different sub-package.
With this change things will just work as long as the default %{source_name}
%{source_summary} and %{source_description} are set by something to sensible values.
%new_package is a wrapper around Name: and %package that abstracts their quirks
from packagers and macros. Its behavior is controled by the %{source_name}
global variable:
– when %{source_name} is not set, the first call to %new_package will create a
Name: block and set %{source_name} to the %{name} of this block.
– when %{source_name} is set:
– a call to %new_package with no arguments creates:
Name: %{source_name}
– otherwise, a call to %new_package creates the corresponding:
%package…
line, unless the resulting %{name} matches %{source_name}. In that case it
creates:
Name: %{source_name}
as before.
Arguments:
– -n and %1 like %package
– -v to print the variables %new_package sets directly.
The intended use-case it to:
– simplify coordination between macros that create subpackages,
– make it easy for packagers to declare which of the macro-created packages
owns the SRPM, and
– make %{source_name} available within spec files and not just as a dnf
synthetic variable.
Unlike %{name} %{source_name} matches the SRPM name regardless of its location
within the spec file.
The check_rhel function should return the same thing on CentOS as it
does on RHEL. Currently CentOS applies this modification downstream.
Now that CentOS is part of the Red Hat family, it would be ideal to push
this modification upstream.
This macro calls `rpm` on background, which is not good idea. Luckily,
it seems to be used just by samba package, so it should not cause any
substantial issues.
More details at \[[1]\] where the guideline to ban `rpm` call during
build is discussed.
[1]: https://pagure.io/packaging-committee/pull-request/954
This cuts the kernel provide generation time from ~33s to 2.5s on my laptop.
Tighten the path matching rule a bit while at it - it doesn't matter that
much with parametric generator but there's no point looking at entries
we don't generate dependencies on.
The Python compileall2 module in /usr/lib/rpm/redhat/
can be executed by various different Python interpreters.
We don't want to write several different `*.pyc` files
to this location - in most cases, that's not possible,
but somebody might run this as root.
