packaging: make sure pyinstaller sees our distributed data files

Running pyinstaller to create a bundle, and using the resulting
`pyinst-tmp/meson/meson setup ...` with the cmake module revealed that
no data files were being bundled, unlike what we did for setup.cfg. Fix
this oversight.

Fixes #10163

packaging/hook-mesonbuild.py

@@ -7,6 +7,9 @@ PyInstaller hook to make mesonbuild include everything it needs to.
 import os
 from glob import glob
 
+from PyInstaller.utils.hooks import collect_data_files
+
+datas = []
 hiddenimports = []
 
 def get_all_modules_from_dir(dirname):
@@ -18,6 +21,10 @@ def get_all_modules_from_dir(dirname):
     modules = ['mesonbuild.' + modname + '.' + x for x in modules if not x.startswith('_')]
     return modules
 
+datas += collect_data_files('mesonbuild.scripts')
+datas += collect_data_files('mesonbuild.cmake.data')
+datas += collect_data_files('mesonbuild.dependencies.data')
+
 hiddenimports += get_all_modules_from_dir('mesonbuild/modules')
 hiddenimports += get_all_modules_from_dir('mesonbuild/scripts')
 

setup.cfg

@@ -47,6 +47,7 @@ typing =
   mypy
   typing_extensions; python_version <"3.8"
 
+# this must be synced with packaging/hook-mesonbuild.py
 [options.package_data]
 mesonbuild.scripts = cmd_or_ps.ps1
 mesonbuild.cmake.data = *