This is useful both from the perspective of optional functionality that
requires a module, and also as I continue to progress with Meson++,
which will probably not implement all of the modules that Meson itself
does.
The dependency lookup is a lot of complex code. This refactor it all
into a single file/class outside of interpreter main class. This new
design allows adding more fallbacks candidates in the future (e.g. using
cc.find_library()) but does not yet add any extra API.
Add a method to perform a logical AND on a feature object. The method
also takes care of raising an error if 'enabled' is ANDed with false.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This is so dumb, we can just insert C for you without you having to know
that you're using C under the hood. This is nicer because:
1) Meson doesn't make the user add a language they're not explicitly
using
2) If there was ever an implementaiton of Vala that didn't use C as
it's assembly language, this wouldn't make any sense.
Currently InstallDir is part of the interpreter, and is an Interpreter
object, which is then put in the Build object. This is a layering
violation, the interperter should have a Holder for build data. This
patch fixes that.
A sub-subproject can be configured directly from
`subprojects/foo/subprojects/bar/` in the case `bar` is in the same git
repository as `foo` and not downloaded separately into the main
project's `subprojects/`. In that case the nested subproject violation
code was wrong because it is allowed to have more than one "subprojects"
in path (was not possible before Meson 0.56.0).
Example:
- self.environment.source_dir = '/home/user/myproject'
- self.root_subdir = 'subprojects/foo/subprojects/bar'
- project_root = '/home/user/myproject/subprojects/foo/subprojects/bar'
- norm = '/home/user/myproject/subprojects/foo/subprojects/bar/file.c'
We want `norm` path to have `project_root` in its parents and not have
`project_root / 'subprojects'` in its parents. In that case we are sure
`file.c` is within `bar` subproject.
So that editors that can fold code (vim, vscode, etc) can correctly fold
functions, instead of getting confused by code that doesn't follow the
current indention. Also, it makes the code easier to read.
When glib is a subproject we should use glib-compile-resources it
overrides using find_program() in the case it is not installed on the
build machine. With old glib version we have to run
glib-compile-resources at configure time to generate the list of
dependencies, but not when glib is recent enough.
wraps from subprojects are now merged into the list of wraps from main
project, so they can be used to download dependencies of dependencies
instead of having to promote wraps manually. If multiple projects
provides the same wrap file, the first one to be configured wins.
This also fix usage of sub-subproject that don't have wrap files. We can
now configure B when its source tree is at
`subprojects/A/subprojects/B/`. This has the implication that we cannot
assume that subproject "foo" is at `self.subproject_dir / 'foo'` any
more.
Sometimes, distros want to configure a project so that it does not
use any bundled library. In this case, meson.build might want
to do something like this, where slirp is a combo option
with values auto/system/internal:
slirp = dependency('', required: false)
if get_option('slirp') != 'internal'
slirp = dependency('slirp',
required: get_option('slirp') == 'system')
endif
if not slirp.found()
slirp = subproject('libslirp', ...) .variable('...')
endif
and we cannot use "fallback" because the "system" value should never
look for a subproject.
This worked until 0.54.x, but in 0.55.x this breaks because of the
automatic subproject search. Note that the desired effect here is
backwards compared to the policy of doing an automatic search on
"required: true"; we only want to do the search if "required" is false!
It would be possible to look for the dependency with `required: false`
and issue the error manually, but it's ugly and it may produce an error
message that looks "different" from Meson's.
Instead, with this change it is possible to achieve this effect in an
even simpler way:
slirp = dependency('slirp',
required: get_option('slirp') != 'auto',
allow_fallback: get_option('slirp') == 'system' ? false : ['slirp', 'libslirp_dep'])
The patch also adds support for "allow_fallback: true", which is
simple and enables automatic fallback to a wrap even for non-required
dependencies.
D lang compilers have an option -release (or similar) which turns off
asserts, contracts, and other runtime type checking. This patch wires
that up to the b_ndebug flag.
Fixes#7082
Initially produced using:
for d in "test cases/failing/"* ; do rm -r _build ; ./meson.py setup "$d" _build | grep ERROR >"$d"/expected_stdout.txt; done
then converted to json with jq using:
jq --raw-input --slurp 'split("\n") | {stdout: map({line: select(. != "")})}' expected_stdout.txt >test.json
or merged with existing json using:
jq --slurp '.[0] + .[1]' test.json expected.json >test.json.new
v2:
Add some comments to explain the match when it isn't totally obvious
v3:
Add or adjust existing re: in expected output to handle '/' or '\' path
separators appearing in message, not location.
v4:
Put expected stdout in test.json, rather than a separate expected_stdout.txt file
Park comments in an unused 'comments' key, as JSON doesn't have a syntax for comments
This change made `5 dependency versions` unit test fail because now once
a subproject has been configured, the fallback variable is checked to be
consistent. So it has to use new subproject because 'somesub' was
already configured by previous tests.
This test was never testing what it claimed to test, simply failing with
"ERROR: No C-like compilers are available, cannot find the framework"
because a C-like language is missing from project().
These are always failing just because the exact version constraint isn't
satisfied, e.g. "ERROR: Meson version is 0.53.999 but project requires
0.48.0"
This test was never testing what it claimed to test, simply failing with
'ERROR: First statement must be a call to project' because it's missing
project().
Since #5279, all unrecognized escape sequences are literal, so I don't
think there's anything to test here.
Dylan Baker
Daniel Mensinger
Laurin-Luis Lehning
Xavier Claessens
Paolo Bonzini
Jussi Pakkanen
Jon Turney