We need to know the project minimum version before evaluating the rest
of the function. There's three basic approaches:
- try to set it inside KwargInfo
- just run a minimal version of func_project for this, then load
everything after
- drop down to the AST and set it before anything else
In order to handle FeatureNew emitted by a FunctionNode evaluated
before project() due to being inlined, such as `version: run_command()`,
only option 3 suffices, the rest all happen way too late. Since we have
just added AST handling support for erroring out, we can do that to set
the version as well.
If we add new kwargs to a function invoked on the first line, we also
need to validate the meson_version before erroring out due to unknown
kwargs. Even if the AST was successfully built.
Amusingly, we also get to improve the error message a bit. By passing
the AST node instead of an interpreter node, we get not just line
numbers, but also column offsets of the issueful meson_version. That
broke the stdout of another failing test; adapt it.
If the meson.build file is sufficiently "broken", even attempting to lex
and parse it will totally fail, and we error out without getting the
opportunity to evalaute the project() function. This can fairly easily
happen if we add new grammar to the syntax, which old versions of meson
cannot understand. Setting a minimum meson_version doesn't help, because
people with a too-old version of meson get parser errors instead of
advice about upgrading meson.
Examples of this include adding dict support to meson.
There are two general approaches to solving this issue, one of which
projects are empowered to do:
- refactor the project to place too-new syntax in a subdir() loaded
build file, so the root file can be interpreted
- teach meson to catch errors in building the initial AST, and just load
enough of the AST to check for meson_version advice
This implements the latter, allowing to future-proof the build
grammar.
Surprisingly enough we need to do this twice. In some cases
(failing-meson/72 triggers this) we can error out after parsing the
codeblock, but without getting the expected eof.
We need to catch both exceptions as either one can interrupt the built
codeblock object.
Co-authored-by: Xavier Claessens <xavier.claessens@collabora.com>
This reverts commit 348248f0a1.
The rules were relaxed in commit ccc4ce28cc
to permit this, so it's never possible to raise this exception anymore.
But that commit was incomplete, and didn't remove the now-useless
infrastructure for exception handling.
The test needed to test this was always broken, and then removed in
commit 465ef856ac, and still this useless
try/except persisted.
The proc-macro code was not running at all because of a missing dash in
the crate type, and the proc macro dylib path was not generated as a
path but including the `-o ` commandline parameter prefix.
As meson requires source_dir!=build_dir and stores the rust-project.json
inside the build directory, while software like rust-analyzer expects it
at the root of the source directory, manual steps are needed for making
them work together.
One option, as described in the documentation, is per project
configuration. Another option, that works correctly with
compile-commands.json and clangd, is to store a symlink to the file in
the build directory at the root of the source directory.
As currently rust-project.json stores paths relative to the location of
the file itself and rust-analyzer does not resolve symlinks, this does
not work.
To solve this, store absolute paths in rust-project.json as is already
done in compile_commands.json for the directory.
Commit e88887be4a ("Only remove substring if it is part of string")
removed the source dir from the rpath when the following check succeeds:
if absdir.startswith(self.environment.get_source_dir()):
rel_to_src = absdir[len(self.environment.get_source_dir()) + 1:]
For example, absdir '/myproject/foo' starts with source dir
'/myproject', so we want to generate the relative path 'foo'.
This code doesn't work with absdir '/myproject-libs/foo' though, because
we'll incorrectly turn it into a relative path 'libs/foo' after
stripping away '/myproject-'.
Use os.path.commonpath() instead of str.startswith() so path components
are correctly handled.
Cc: Niklas Claesson <niklas.claesson@cosylab.com>
Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Inside of mesonbuild.ast.* we can and should import from .foobar, rather
than importing from .__init__'s re-exported version of that object.
Failing to do so results in an extremely brittle codebase where simply
changing the order of lines in __init__.py can result in ImportError.
This can happen from typos, which then confusingly claim that neither
build directory has a meson.build file because the implicit . directory
was not actually one of the directories. Instead a random command line
argument was interpreted as a directory name.
Fixes#11472
Caching Compiler.run() seems likely to cause problems, but some users, like
.sizeof(), we know enough about the program run to make it safe.
This commit just adds the Compiler.cached_run(), a subsequent commit makes use
of it.
These are necessary for projects outside Meson itself that want to
extend the 'meson install' functionality as meson-python does to
assemble Python package wheels from Meson projects.
Fixes#11426.
It seems this happens because at some point setuptools imports gettext,
and we have a script by the same name.
In general, this path injection by default is bad news for our use case.
Python 3.11 introduced -P for this reason, but we cannot depend on that.
Instead, check for it first, and delete it, before doing more imports.
The version lookup should be silent. While we're at it, the version
lookup should not be happening more than once, which printing multiple
messages indicated we were doing. Pass the version into the per-file
function rather than looking it up fresh each time.
Fixes https://github.com/mesonbuild/meson/pull/11054#issuecomment-1430169280
Rustc as of version 1.61.0 has support for controlling when
whole-archive linking takes place, previous to this it tried to make a
good guess about what you wanted, which worked most of the time. This is
now implemented.
Additionally, rustc makes some assumptions about library names
(specifically static names), that meson does not keep. This can be fixed
with rustc 1.67, where a new +verbatim modifier has been added. We can
then force rustc to use the name we give it. Before that, we can sneak
through `/WHOELARCHIVE:` in cases of dynamic linking (into a dll or
exe), but we can't force the archiver to do what we want (rustc
considers the archiver to be an implementation detail). The only
solution I can come up with is to copy the library to the format that
rustc expects. I've run into some issues with that as well, so we warn
in that case.
The decisions to leave static into static broken on MSVC for 1.61–1.66
was made because:
1) The work around is non-trivial, and we would have to support that
workaround for a long time
2) The number of users of Rust in Meson is small
3) The number of users of Rust in Meson on Windows, with MSVC is tiny
4) Using rustup to update rustc on windows is trivial, and solves the
problem completely
Fixes: #10723Fixes: #11247
Co-authored-by: Nirbheek Chauhan <nirbheek@centricular.com>
This workaround was never exclusive to python2, and in fact only just
got fixed in the upcoming python 3.12 release. Extend the version
comparison to cover all those other cases.
Only search for and provide linkage to libpython, if the dependency
expects to be linked to it. Fixes overlinking on Linux / macOS when
pkg-config isn't installed and the sysconfig lookup is used instead.
This was correctly handled for pkg-config rather than deferring it until
use, since commit bf83274344 -- but that
handling neglected to cover sysconfig dependencies. And sysconfig would
always try to link to libpython, it just respected the dependency
configuration barely enough to allow falling back to "don't link" if
both link_libpython=False and the library wasn't found.
We have two copies of this code, and the python module one is vastly
superior, not just because it allows choosing which python executable to
base itself on. Unify this. Fixes various issues including non-Windows
support for sysconfig, and pypy edge cases.
In preparation for wholly merging the dependency handling from the
python module into dependencies.*, move the unique class definitions
from there into their new home in dependencies.python, which is
semantically convenient.
In preparation for handling more work inside dependencies.*, we need to
be able to run a PythonExternalProgram from the python dependency. Move
most of the definition -- but only the parts that have no interest in a
ModuleState -- and subclass a bit of sanity checking that we need to
handle specially when used in the module.
It can go directly inside the function which immediately uses it.
There's no purpose in looking it up exactly once and using it exactly
once, but looking it up outside the function and complicating the
function signature in order to pass it as a function argument.
We write this out as an embedded string to a tempfile in order to run
it, which is pretty awkward. And usually Meson's files are already files
on disk, not packed into a zip, so we can simply run it directly. Since
python 3.7, which is our new minimum, we can handle this well via the
stdlib. (There's also mesonbuild.mesondata, but we do not need
persistence in the builddir.)
This also solves the problem that has always been there, of giant python
programs inside strings occasionally confusing syntax highlighters. Or
even, it would be nice if we had syntax highlighting for this
introspection program. :D
We pass around a PythonInstallation into the depths of the dependency
factory, solely so that we can get at is_pypy in one particular branch.
We don't need the DSL functions, we don't need access to the
interpreter, let's just use the enhanced ExternalProgram object on its
own.
Add is_pypy to the object, and modify other references to get
information from .info['...'] instead of direct access.
Do not allow hanging forever.
It's fine to use selectors here, which are unix-only, because we require
Unix + a system that has e.g. sudo installed, anyway.
If the user runs `sudo meson install` this may run ninja to build
everything that gets installed. This naturally happens as root also, by
default, which is bad. Instead, detect root elevation tools and drop the
uid/gid of the child ninja process back to the original invoking user
before doing anything.
There's a couple issues with the current approach:
- pkexec is an unusual elevation method, the standard is sudo
- it tries to elevate even in automated workflows
- the user may not want to automatically rerun as root, that might be
badly behaved
Do some upfront checks instead, first to make sure it even makes sense
to try becoming root, and then to ask the user "do you really want
this". Also check for a couple common approaches to root elevation,
including doas.
Fixes#7345Fixes#7809
We just finished running rebuild_all, and then actually running
the install routine failed because of permission errors, so we magically
reran as root. But we should *know* that all prerequisite targets are up
to date already, we don't need to run it *again*.
Nevertheless, when running meson install directly we could end up
without --no-rebuild in the original argv. This meant that it wouldn't
be in the re-executed argv either. Add it on just in case -- repeating
it twice doesn't hurt anyway.
This method allows meson.build to introspect on the changed options.
It works by merely exposing the same set of data that is logged by
MesonApp._generate.
Fixes#10898
Suppressing all exceptions was hidding even syntax errors in compiler
source code. If a compiler cannot be found, a MesonException is raised,
we should only expect that type.
Eli Schwartz
Xavier Claessens
Sebastian Dröge
Stefan Hajnoczi
Jussi Pakkanen
Andres Freund
Charles Brunet
Daniele Nicolodi
mtribiere
Dylan Baker
Karol Herbst
L. E. Segovia