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Build targets should have a link dependency on the version scripts they
use. This also uses absolute paths in anticipation for meson 1.3
needlessly deprecating file to string conversions.
This was requested, though I think an issue was never filed. If people are
supposed to invoke it, even for testing, then it's reasonable to make it
"public".
The tool initially just measured the boot phase, but was subsequently
extended to measure file system and machine IDs, too. At AllSystemsGo
there were request to add more, and make the tool generically
accessible.
Hence, let's rename the binary (but not the pcrphase services), to make
clear the tool is not just measureing the boot phase, but a lot of other
things too.
The tool is located in /usr/lib/ and still relatively new, hence let's
just rename the binary and be done with it, while keeping the unit names
stable.
While we are at it, also move the tool out of src/boot/ and into its own
src/pcrextend/ dir, since it's not really doing boot related stuff
anymore.
Installing ukify.py doesn't require a working UEFI architecture, but
only that the bootloader option is enabled (and python3). On Debian
Arch: all packages (like python scripts) can theorethically be built
on any builder with any architecture, so there's no guarantee that
it will actually be an EFI-enabled architecture to do that package build.
Relax the requirement to check only for the ukify config option.
This conceptually reverts e95acdfe1d,
but the actual contents of the script are taken from the command invocation
in meson with all the updates that happened in the meantime.
One small change is that I replaced () by {}: this avoids one subprocess spawn.
People were worried about the cost of vcs_tag(), and this microoptimization may
help a bit. I measured the speed on machine, and noop rebuilds are still about
100–120 ms.
The logic is entirely moved to the script. This makes the meson config simpler
and also makes it easier to use it externally.
The script is needed for in-place rpm builds, see README.build-in-place.md [1],
where it is invoked from the spec file to determine the project version.
[1] https://src.fedoraproject.org/rpms/systemd/blob/rawhide/f/README.build-in-place.md
The name is created as "systemd:fuzz / fuzz-<fuzzer_name>_<sample_name>"
and if that's very long, output gets wrapped when 'meson test' is run, and
this is rather annoying.
Disallow filenames above 45 characters, which leads a 60 char names.
The notice in the man page is removed and the tool is moved into the $PATH.
A compat symlink is provided.
It is fairly widely used now, and realistically we need to keep backwards
compat or people will be very unhappy.
This partially reverts 3c1eee5bed.
I thought that it is not necessary, but
https://mesonbuild.com/Reference-manual_functions.html#vcs_tag says:
> This method returns a custom_tgt should be used to signal dependencies if
> other targets use the file outputted by this.
>
> For example, if you generate a header with this and want to use that in a
> build target, you must add the return value to the sources of that build
> target. Without that, Meson will not know the order in which to build the
> targets.
We can use version_h directly, since we already have it.
Hopefully fixes https://github.com/systemd/systemd/issues/28994.
Let's also use vcs_tag() when we're doing a non-git build. In those scenarios,
the build would normally be done just once in a given copy, so doing an extra
call does not matter. We can save a few lines of meson config.
The special path was added in 064b8e2c99, with
the justifaction that vcs_tag() is slow and -Dversion-tag=foo can be used to
fix the version tag and speed up partial rebuilds. I think the justification
for this is weak: having an accurate version tag is particularly useful when
developing the code. Shaving of a fraction of a second at the cost of having to
manually update the version seems iffy.
Secondly, with vcs_tag() we can be pretty sure that meson will build the
version file first and that it'll be available to all build steps. Because we
didn't use version tag, we had to manually specify the dependency on version.h
in various places. It seems nicer to use vcs_tag() and not have to deal with
this problem at all.
Finally, the savings in time seem much smaller than back when
064b8e2c99 was made. It reported a change
from 94 ms to 521 ms. But now the difference seems to be about 50 ms:
Before this patch:
$ time ninja -C build
ninja: Entering directory `build'
ninja: no work to do.
ninja -C build 0.04s user 0.02s system 97% cpu 0.057 total
ninja -C build 0.03s user 0.01s system 97% cpu 0.049 total
ninja -C build 0.03s user 0.02s system 96% cpu 0.051 total
ninja -C build 0.03s user 0.01s system 96% cpu 0.049 total
ninja -C build 0.03s user 0.01s system 97% cpu 0.046 total
With the two patches in this PR:
systemd-stable [drop-versiondep] time ninja -C build
ninja: Entering directory `build'
[1/669] Generating version.h with a custom command
ninja -C build 0.08s user 0.03s system 98% cpu 0.106 total
ninja -C build 0.08s user 0.03s system 98% cpu 0.104 total
ninja -C build 0.09s user 0.02s system 98% cpu 0.116 total
ninja -C build 0.08s user 0.02s system 97% cpu 0.108 total
Overall, I think the tiny time savings are not worth the complexity.
The use of vcs_tag was dropped in #28567, which results in builds having
stale version information once new commit are made.
This also fixes a case where CI builds would have no version information
because they are checked out without any tags for git-describe to use.
Additionally, use `--git-dir` now, as that particular issues seems to
have been fixed by now.
We went back-and-forth a bit on this. Very old meson would print a message
about detecting the program if a quoted argument was used, leading to a lot of
noise. So we started to convert various places to use the variable, but then it
turned out that meson < 0.56.2 doesn't handle this correctly and we reverted to
using strings everywhere in 7c22f07cbd. Then at
some point we stopped supporting old meson and over time we started using the
variable in various places again, somewhat inconsistently. Then most calls to
'sh' were removed in 9289e093ae when
install_emptydir() builtin started being used.
Now meson allows either the string or variable to be used, and doesn't print a
message if the string is used. Let's use the variable everywhere. For 'sh', we
could do either, but for other variables, we _do_ want the detection to happen,
for example for git, find, awk, which might not be installed and we want to
detect that early, before we start the build. It would be ugly to use quotes
for some programs, but not for others. Also, a string is still refused for
test(), so we couldn't use the string version even if we didn't care about
detection.
Now that we use meson feature options for our dependencies, we can just
rely on '--auto-features=disabled' to do the same. One benefit of this
is that specific features can still be force-enabled by overriding it
with the appropriate '-Dfeature=enabled' flag.
The two remaining uses for skip-deps can simply rely on their default
logic that sets the value to 'no' when the dependency is disabled.
Also, there is no need to conditionalize the get_variable() calls
because not-found dependencies will just return the passed default value
if provided.
This uses a two-step approach to make sure we can fall back to
find_library(), while also skipping the detection if the features are
explicitly disabled.
By making this a disabler dependency, we can slightly simplify the code
and it als fixes the build for -Dfdisk=disabled as we failed to create a
fallback empty libshared_fdisk variable.
By using meson features we can replace the handcrafted dependency
auto-detection by just passing the value from get_option directly to the
required arg for dependency, find_library etc.
'auto' features make the dependency optional, 'enabled' requires it
while 'disabled' features will skip detection entirely.
Any skipped or not found dependency will just be a no-op when passed to
build steps and therefore we can also skip the creation of empty vars.
The use of skip_deps for these is dropped here as meson provides a way
to disable all optional features in one go by passing
'-Dauto_features=disabled'.
This is a magic string, and we should avoid stepping into the territory
of normal keymap names with that, given that users can pick names
otherwise freely.
Hence, prefix the name with a special char to avoid any namespace
issues.
Follow-up for: #28660
This partially revert 0454cf05d3.
The executable actually does not work with itself, but needs to be
combined with test-udev.py. But, even so, the executable is for testing.
In the next commit, test and normal executables are declared in the same
way, and naming of the executable becomes essential to classify them.
Let's rename the executable and prefix with 'test-'.
One of the notable change is that previously test-sysusers.sh was installed
unconditionally, but now it is installed only when sysusers is enabled.
Another change is that test-sysv-generator is now re-introduced which
was mistakenly dropped by 6c713961ab.
