BLD: build with our numpy fork of meson

numpy · mattip · Aug 10, 2023 · Aug 9, 2023 · Aug 9, 2023 · Aug 9, 2023
commit 4d05cd1ef67f6c9b4f0bb63d69d388f7651c62bf
diff --git a/.spin/cmds.py b/.spin/cmds.py
@@ -11,6 +11,54 @@
 from spin import util
 
 
+# The numpy-vendored version of Meson. Put the directory that the executable
+# `meson` is in at the front of the PATH.
+curdir = pathlib.Path(__file__).parent.resolve()
+meson_executable_dir = str(curdir.parent / 'vendored-meson' / 'entrypoint')
+os.environ['PATH'] = meson_executable_dir + os.pathsep + os.environ['PATH']
+
+# Check that the meson git submodule is present
+meson_import_dir = curdir.parent / 'vendored-meson' / 'meson' / 'mesonbuild'
+if not meson_import_dir.exists():
+    raise RuntimeError(
+        'The `vendored-meson/meson` git submodule does not exist! ' +
+        'Run `git submodule update --init` to fix this problem.'
+    )
+
+
+@click.command()
+@click.option(
+    "-j", "--jobs",
+    help="Number of parallel tasks to launch",
+    type=int
+)
+@click.option(
+    "--clean", is_flag=True,
+    help="Clean build directory before build"
+)
+@click.option(
+    "-v", "--verbose", is_flag=True,
+    help="Print all build output, even installation"
+)
+@click.argument("meson_args", nargs=-1)
+@click.pass_context
+def build(ctx, meson_args, jobs=None, clean=False, verbose=False):
+    """🔧 Build package with Meson/ninja and install
+
+    MESON_ARGS are passed through e.g.:
+
+    spin build -- -Dpkg_config_path=/lib64/pkgconfig
+
+    The package is installed to build-install
+
+    By default builds for release, to be able to use a debugger set CFLAGS
+    appropriately. For example, for linux use
+
+    CFLAGS="-O0 -g" spin build
+    """
+    ctx.forward(meson.build)
+
+
 @click.command()
 @click.argument("sphinx_target", default="html")
 @click.option(

diff --git a/pyproject.toml b/pyproject.toml
@@ -1,5 +1,6 @@
 [build-system]
-build-backend = "mesonpy"
+build-backend = "npbuild"
+backend-path = ['./vendored-meson/build-backend-wrapper']
 requires = [
     "Cython>=3.0",
     "meson-python>=0.13.1",
@@ -184,7 +185,7 @@ repair-wheel-command = "bash ./tools/wheels/repair_windows.sh {wheel} {dest_dir}
 package = 'numpy'
 
 [tool.spin.commands]
-"Build" = ["spin.cmds.meson.build", ".spin/cmds.py:test"]
+"Build" = [".spin/cmds.py:build", ".spin/cmds.py:test"]
 "Environments" = [
   ".spin/cmds.py:run", ".spin/cmds.py:ipython",
   ".spin/cmds.py:python", ".spin/cmds.py:gdb"

diff --git a/vendored-meson/build-backend-wrapper/npbuild/__init__.py b/vendored-meson/build-backend-wrapper/npbuild/__init__.py
@@ -0,0 +1,27 @@
+import os
+import sys
+import pathlib
+
+from mesonpy import (
+    build_sdist,
+    build_wheel,
+    build_editable,
+    get_requires_for_build_sdist,
+    get_requires_for_build_wheel,
+    get_requires_for_build_editable,
+)
+
+
+# The numpy-vendored version of Meson. Put the directory that the executable
+# `meson` is in at the front of the PATH.
+curdir = pathlib.Path(__file__).parent.resolve()
+meson_executable_dir = str(curdir.parent.parent / 'entrypoint')
+os.environ['PATH'] = meson_executable_dir + os.pathsep + os.environ['PATH']
+
+# Check that the meson git submodule is present
+meson_import_dir = curdir.parent.parent / 'meson' / 'mesonbuild'
+if not meson_import_dir.exists():
+    raise RuntimeError(
+        'The `vendored-meson/meson` git submodule does not exist! ' +
+        'Run `git submodule update --init` to fix this problem.'
+    )
diff --git a/vendored-meson/entrypoint/meson b/vendored-meson/entrypoint/meson
@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+import re
+import sys
+import pathlib
+
+
+# The numpy-vendored version of Meson
+meson_dir = str(pathlib.Path(__file__).resolve().parent.parent / 'meson')
+sys.path.insert(0, meson_dir)
+
+from mesonbuild.mesonmain import main
+import mesonbuild
+if not 'vendored-meson' in mesonbuild.__path__[0]:
+    # Note: only the print statement will show most likely, not the exception.
+    # If this goes wrong, it first fails inside meson-python on the `meson
+    # --version` check.
+    print(f'picking up the wrong `meson`: {mesonbuild.__path__}')
+    raise RuntimeError('incorrect mesonbuild module, exiting')
+
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())