Merge pull request #2732 from mgorny/setuptools-backend

Fix using `setuptools.build_meta` backend

pyproject.toml

@@ -76,9 +76,7 @@ requires = [
     "requests >= 2.26.0",
     "sip == 6.10.0",
 ]
-# Using "setuptools.build_meta:__legacy__" instead of "setuptools.build_meta" for now.
-# Allows to have access to the folder on the search path when building, like before.
-build-backend = "setuptools.build_meta:__legacy__"
+build-backend = "setuptools.build_meta"
 
 [tool.setuptools.packages.find]
 exclude = ["src", "buildtools*", "etgtools", "sphinxtools", "src", "unittests"]

setup.py

@@ -20,6 +20,9 @@ from setuptools.command.bdist_egg   import bdist_egg as orig_bdist_egg
 from setuptools.command.sdist       import sdist as orig_sdist
 from setuptools.command.bdist_wheel import bdist_wheel as orig_bdist_wheel
 
+# Alter the path so that buildtools can be imported from the current directory.
+sys.path.insert(0, os.path.dirname(__file__))
+
 from buildtools.config import Config, msg, opj, runcmd, canGetSOName, getSOName
 import buildtools.version as version