The regex in question causes Python's regex parser to freeze
indefinitely in certain Python versions. That might be due
to a bug or because the re does infinite backtracking and it just
happened to work on earlier implementations.
It used to be possible to do this:
```
bomb = find_program('nonexisting', required: false)
test('traceback during meson test', bomb)
```
and it would in fact bomb out, with:
```
[0/1] Running all tests.
Traceback (most recent call last):
File "/usr/lib/python3.10/site-packages/mesonbuild/mesonmain.py", line 149, in run
return options.run_func(options)
File "/usr/lib/python3.10/site-packages/mesonbuild/mtest.py", line 2017, in run
return th.doit()
File "/usr/lib/python3.10/site-packages/mesonbuild/mtest.py", line 1685, in doit
runners.extend(self.get_test_runner(test) for test in tests)
File "/usr/lib/python3.10/site-packages/mesonbuild/mtest.py", line 1685, in <genexpr>
runners.extend(self.get_test_runner(test) for test in tests)
File "/usr/lib/python3.10/site-packages/mesonbuild/mtest.py", line 1586, in get_test_runner
return SingleTestRunner(test, env, name, options)
File "/usr/lib/python3.10/site-packages/mesonbuild/mtest.py", line 1308, in __init__
self.cmd = self._get_cmd()
File "/usr/lib/python3.10/site-packages/mesonbuild/mtest.py", line 1374, in _get_cmd
test_cmd = self._get_test_cmd()
File "/usr/lib/python3.10/site-packages/mesonbuild/mtest.py", line 1352, in _get_test_cmd
if self.options.no_rebuild and not os.path.isfile(testentry):
File "/usr/lib/python3.10/genericpath.py", line 30, in isfile
st = os.stat(path)
TypeError: stat: path should be string, bytes, os.PathLike or integer, not NoneType
ERROR: Unhandled python exception
This is a Meson bug and should be reported!
```
This is something we explicitly check for elsewhere, for example when
using a not-found program as a command in a custom target or generator.
Check for it when making a test too, and error out with a similar error.
Fixes#10091
This reverts commit e257a870fe.
The PR adding this command had infinitely hanging CI, and now that it is
merged to master we cannot get any CI on any PR to succeed.
There are two cases where we can assume we found the python dependency
with its requisite libraries using sysconfig:
- we found the library with find_library and are prepared to link to it
- the library is not actually part of the dependency, so its presence or
absence is irrelevant
In the latter case, we should consider it found if link_libpython is
False. Originally we did this, but the logic was inverted in commit
5b422fce87 in an unrelated change and
without explanation, likely by accident.
Normally this doesn't much matter, since a python invariably comes with
a predictably located libpython and the first condition evaluates true.
But that is not true for pypy, and in fact that is the reason the
link_libpython check was originally added in commit
1bd14b52b2.
Restore that original logic.
Fixes#8570
These are only used for type checking, so don't bother importing them at
runtime.
Generally add future annotations at the same time, to make sure that
existing uses of these imports don't need to be quoted.
Using future annotations, type annotations become strings at runtime and
don't impact performance. This is not possible to do with T.cast though,
because it is a function argument instead of an annotation.
Quote the type argument everywhere in order to have the same effect as
future annotations. This also allows linters to better detect in some
cases that a given import is typing-only.
A bunch of files have several T.TYPE_CHECKING blocks that each do some
things which could just as well be done once, with a single `if`
statement. Make them do so.
It is often useful to check the found version of a program without
checking whether you can successfully find
`find_program('foo', required: false, version: '>=XXX')`
Disabling targets because the tools used to build them aren't available
is a pretty suspicious thing to do. Users who want this are probably, in
general, advised to check themselves whether it is possible to build
those targets with find_program(..., required: false)
The i18n.gettext() invocation is a bit unusual because the product of
running it is non-critical files, specifically, translation catalogs. If
users don't have the tools needed to build them, they may not be able to
use them either, because perhaps they have NLS disabled on their
platform or it's difficult to put it in the bootstrap path.
So, for this reason, it was made non-fatal and the message catalogs are
just not created, and the resulting build is still perfectly usable
*unless* you want to use it in another language, at which point it
"works" but the text is all inscrutable to the end user, and that's a
feature of the target platform.
That's an acceptable tradeoff for translation catalogs.
It is NOT an acceptable tradeoff for merge_file, which produces desktop
files or MIME database catalogs or other files which have crucial roles
to perform, without which the software in question simply doesn't work
at all. In such cases, this just fails to install crucial files, users
report bugs to the project in question, and the project adds
`find_program('xgettext')` to guarantee the hard error due to lack of
confidence in Meson.
Fixes#6165Fixes#8436
Use this instead of shutil.which to detect whether they will be
available, and pass the ExternalProgram object to CustomTarget
invocations, or else make use of the new functionality to specify the
correct program path in wrapper scripts.
Drop duplicate reporting for itstool missing. Since we use find_program
in required mode, its absence is already fatal, and already has a really
good error description.
Don't assume itstool, msgfmt et al. are just magically on the path.
Normally for commands being processed in build.ninja we'd look up the
program in order to run it. Offer the same guarantee for programs being
passed through an awkward script wrapper.
Due to misuse of argparse in commit 82492f5d76
it was impossible to use both --datadirs and extra args passed directly
to msgfmt at the same time.
I'm not sure anyone actually knows how argparse works, so misusing it is
easy. What is definitely known is that argparse is NOT a POSIX compliant
parser and doesn't behave the way you'd expect a standards based parser
to handle options. Instead it caters to the easy use case, and hopes and
prays you don't need to do anything too complicated "with the wrong kind
of complicated".
Apparently, this particular type of complicated is when you have mixed
option_arguments and operands while simultaneously passing some operands
as nargs after a --.
It totally breaks, and interprets --datadirs, which is supposed to be an
option_argument, as an operand, eats it up as a msgfmt wrapped argument,
and breaks.
But if you don't pass additional arguments with -- then it interprets
--datadirs after operands as an option_argument. This is what we were
doing.
Instead pass option_arguments before all operands (including the ones
specified via `-- ...`). Add test case to pass meaningless datadirs (we
don't actually care if $GETTEXTDATADIRS is set to something that doesn't
contain gettext data).
- Change `scope` kwarg to `public` boolean default to false.
- Change `side` kwarg to `client` and `server` booleans.
- Document returned values
- Aggregate in a single unit test because have lots of small tests
increases CI time.
Fixes: #10040.
Xavier Claessens
Jussi Pakkanen
Eli Schwartz
Marvin Scholz
Tristan Partin
Dylan Baker
Darren Ng