Instead of using fragile guessing to figure out how to invoke meson,
set the value when meson is run. Also rework how we pass of
meson_script_launcher to regenchecker.py -- it wasn't even being used
With this change, we only need to guess the meson path when running
the tests, and in that case:
1. If MESON_EXE is set in the env, we know how to run meson
for project tests.
2. MESON_EXE is not set, which means we run the configure in-process
for project tests and need to guess what meson to run, so either
- meson.py is found next to run_tests.py, or
- meson, meson.py, or meson.exe is in PATH
Otherwise, you can invoke meson in the following ways:
1. meson is installed, and mesonbuild is available in PYTHONPATH:
- meson, meson.py, meson.exe from PATH
- python3 -m mesonbuild.mesonmain
- python3 /path/to/meson.py
- meson is a shell wrapper to meson.real
2. meson is not installed, and is run from git:
- Absolute path to meson.py
- Relative path to meson.py
- Symlink to meson.py
All these are tested in test_meson_commands.py, except meson.exe since
that involves building the meson msi and installing it.
./mesonbuild/scripts/regen_checker.py:35:5: F841 local variable 'scriptdir' is assigned to but never used
scriptdir = os.path.split(__file__)[0]
^
./mesonbuild/scripts/yelphelper.py:84:13: F841 local variable 'symfile' is assigned to but never used
symfile = os.path.join(install_dir, m)
^
./mesonbuild/backend/backends.py:164:13: F841 local variable 'lang' is assigned to but never used
lang = comp.get_language()
^
./mesonbuild/backend/ninjabackend.py:1286:9: F841 local variable 'scriptdir' is assigned to but never used
scriptdir = self.environment.get_script_dir()
^
./mesonbuild/backend/vs2010backend.py:736:9: F841 local variable 'additional_options_set' is assigned to but never used
additional_options_set = True
^
Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>
Using 'mesonbuild' as the module can cause it to use the
system-installed module and can also break if we rename the directory,
so avoid that by always using relative imports.
The Meson script is not always in $scriptdir/../../ -- for instance if
installed with pip on Windows, the scriptdir is in:
C:/Python35/Lib/site-packages/meson-0.33.0.dev1-py3.5.egg/mesonbuild/scripts
and the meson.py script is in:
C:/Python35/Scripts
So, let's save the path available as Environment().meson_script_file
into the coredata.dat private file and use that to invoke Meson when
doing regen.
Also, let's fetch the backend that was used from the coredata too
instead of hard-coding vs2010.
Both these were causing a hard failure while doing regen with msbuild or
visual studio.
Nirbheek Chauhan