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.
This can raise any OSError, but we only caught two of them that indicate
a particular failure case. Also catch the generic error form with a more
generic message.
This produces better error messages in cases where e.g. exclusive lock
is not supported.
The current check results in *any* value to `export_dynamic` generating
vala import targets, even `false`. This is pretty clearly wrong, as it
really wants to treat an unset export_dynamic as false.
This adds two new methods, that are conceptually related in the same way
that `enable_auto_if` and `disable_auto_if` are. They are different
however, in that they will always replace an `auto` value with an
`enabled` or `disabled` value, or error if the feature is in the
opposite state (calling `feature(disabled).enable_if(true)`, for
example). This matters when the feature will be passed to
dependency(required : …)`, which has different behavior when passed an
enabled feature than an auto one.
The `disable_if` method will be controversial, I'm sure, since it
can be expressed via `feature.require()` (`feature.require(not
condition) == feature.disable_if(condition)`). I have two defences of
this:
1) `feature.require` is difficult to reason about, I would expect
require to be equivalent to `feature.enable_if(condition)`, not to
`feature.disable_if(not condition)`.
2) mixing `enable_if` and `disable_if` in the same call chain is much
clearer than mixing `require` and `enable_if`:
```meson
get_option('feat') \
.enable_if(foo) \
.disable_if(bar) \
.enable_if(opt)
```
vs
```meson
get_option('feat') \
.enable_if(foo) \
.require(not bar) \
.enable_if(opt)
```
In the first chain it's immediately obvious what is happening, in the
second, not so much, especially if you're not familiar with what
`require` means.
It's always been strange to me we don't have an opposite method of the
`disable_auto_if` method, but I've been pressed to find a case where we
_need_ one, because `disable_auto_if` can't be logically contorted to
work. I finally found the case where they're not equivalent: when you
don't want to convert to a boolean:
```meson
f = get_option('feat').disable_auto_if(not foo)
g = get_option('feat').enable_auto_if(foo)
dep1 = dependency('foo', required : f)
dep2 = dependency('foo', required : g)
```
#8259 induced a regression, causing Meson 0.57.0 and upward to
stop printing outputs of scripts added using `meson.add_*_script()`.
This makes _find_source_scripts() mark executables as verbose
in meson_exe.
This is generally a good idea, and the tempfile is already instructed to
not auto-delete on close. It also fixes a bug on PyPy, where the file
isn't valid because it's not explicitly closed. This is probably due to
the garbage collection modes -- in CPython, the object goes out of scope
and gets automatically closed before we actually attempt to unpack it.
Fixes#11246
This solves rebuild issues when e.g. importing a .pxd header from a .pyx
file, just like C/C++ source headers. The transpiler needs to run again
in this case.
This functionality is present in the 3.0.0 alphas of cython, and is also
backported to 0.29.33.
Fixes#9049
We want to use as much default ninja behavior as we can, so reuse $out
instead of repeating the output file as a string in $ARGS, and raise
that into the build rule so it is only listed once.
If someone specifies a binary in a machine file, but the resulting
prog.found() is false because it doesn't actually exist on disk, then
the user was probably trying to disable finding that program. But
find_program() currently doesn't distinguish between a machine file
lookup returning a not-found program, and returning a dummy program
because there's no entry at all.
Explicitly check for a dummy program, rather than checking if the
program was found, before deciding whether to discard the lookup results
and continue trying other program lookup methods.
The bionic image is really old and mainly exists to test that Meson
itself still works on really old distros (and really old python).
Ideally we'd avoid depending too much on it.
We can get a very modern pypy3 automatically this way, and potentially
use it for more stuff too.
It's already run on other distros. This one fails though, due to missing
debug info.
```
valgrind: Possible fixes: (1, short term): install glibc's debuginfo
valgrind: package on this machine. (2, longer term): ask the packagers
valgrind: for your Linux distribution to please in future ship a non-
valgrind: stripped ld.so (or whatever the dynamic linker .so is called)
```
It doesn't seem possible to have this work out of the box. The debuginfo
packages aren't reliably available, and debuginfod servers -- even if
they worked, which they apparently don't -- would not help anyway since
old version pruning can result in symbols disappearing before the image
is rebuilt, and thereby causing failure.
It's not really critical to test this, since as mentioned we already
have coverage of Meson's side in other distro ciimages.
gpgme has decided that config-tool is bad, which makes sense. They've
also decided that they will only install theirs, if gpg-error also
installs one, which is a bit... confusing. Anyway, it's impossible to
know whether it should or should not exist, so just accept that this
test is ready to be skipped on distros that currently no longer have
this ancient config-tool script.
Victory is within reach!
This was causing a ninja issue where the native headers were always
being generated because io.github.hse-project.hse_Hse.h was being
expected, but io.github.hse_project.hse_Hse.h was actually generated.
Now that we don't insert /utf-8 into the always args for MSVC < 19.00
we need to use a version > 19.00 for testing. This also means that
/Zc:__cplusplus will be added to the always args.
Eventually we would probably be better served (to avoid unnecessary
copies) to use the ImmutableListProtocol here, but for the moment this
is effective, it's also what we do in every other case.
Eli Schwartz
Karol Herbst
L. E. Segovia
Xavier Claessens
Eisuke Kawashima
Dylan Baker
Luke Elliott
Charles Brunet
Simon McVittie
Daniele Nicolodi
Tristan Partin
Nirbheek Chauhan