On 09. 03. 22 8:57, Felix Schwarz wrote:
Hi Kevin,
Am 08.03.22 um 01:33 schrieb Kevin Kofler via devel:
There is actually a "mock shell" command that opens a shell inside the mock
chroot. You can also run arbitrary shell commands (including scripts that
you have previously manually copied in using the "copyin" command) in it.
I knew "mock shell" (via "fedpkg mockbuild --shell") but that only gave me a
shell at the very beginning of the build process while (ideally) I wanted to
set a kind of "breakpoint"+gdb/pdb at an arbitrary point in the build process.
(For example most of the build process works just fine so I want all the
%prep/%build steps to run automatically while only fiddling around inside %check.)
After reading your answer + mock manpages I discovered mock's
"--no-cleanup-after" which could help inspecting the state after a failed run.
That should be pretty helpful, I'll try that next time I need to figure out why
some test suite is failing. :-)
When I do iterative changes, I generally always build with:
First build:
$ mock -r ... clean && fedpkg --release rawhide mockbuild -N
Next build:
$ fedpkg --release ... mockbuild -N
When the deps are unchanged:
$ fedpkg --release ... mockbuild -N --disablerepo='*'
There is also the ccache plugin that might make things faster, but it breaks
with --disablerepo='*' :(
My commands give me a mock environment where I can shell in an execute commands
when failures happen. A good shell commands are
$ mock -r ... shell --unpriv --cwd /builddir/build/BUILD/
$ mock -r ... shell --unpriv --cwd /builddir/build/BUILD/foobar-6.6.6/
However, shelling in is useful but sometimes, when %build takes (a) hour(s), it
is still tedious to do iterative changes in what is written in %install, %check
or %files.
Mock has a --short-circuit option:
--short-circuit {prep,install,build,binary}
Pass short-circuit option to rpmbuild to skip already
complete stages. Warning: produced packages are
unusable. Implies --no-clean. Valid options: build,
install, binary
It passes the following options to rpmbuild:
https://github.com/rpm-software-management/mock/blob/mock-2.16-1/mock/py/mockbuild/backend.py#L705
When the package build (with -N) fails in %check, %install or %files (but you
assume the result of %build is correct), you can run:
$ fedpkg --release rawhide mockbuild -N -- --short-circuit install
(The -- separates options that fedpkg understands from options that it just
blindly passes down to mock.)
It will create a new SRPM, install any new deps added as BuildRequires (but I
think it's skip %generate_buildrequires), cd to the right directory (no idea
how it knows) and executes %install, %check and creates the RPM packages.
It is almost magical.
It can however, sometimes explode miserably. E.g. when %install actually moves
files in builddir first and you try to do this twice.
Hope that helps.
--
Miro Hrončok
--
Phone: +420777974800
IRC: mhroncok
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