build_wheels.py

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__doc__ = """
A very simple script to build wheels for which we have build scripts.
The steps are:

1. Download GraalPy
2. Make a venv
3. Install some default packages like wheel or auditwheel
4. Go over the build scripts and run them in the venv
"""

import hashlib
import importlib
import os
import re
import shlex
import shutil
import subprocess
import sys
import tarfile
import zipfile

from argparse import ArgumentParser
from glob import glob
from os.path import abspath, basename, dirname, exists, isabs, join, splitext
from tempfile import TemporaryDirectory
from urllib.request import urlretrieve


def ensure_installed(name):
    try:
        return importlib.import_module(name)
    except ImportError:
        subprocess.check_call([sys.executable, "-m", "pip", "install", name])
        return importlib.import_module(name)


def download(url, out):
    print("Downloading", url, flush=True)
    urlretrieve(url, out)


def extract(archive):
    print("Extracting", archive, flush=True)
    if splitext(archive)[1] == ".zip":
        with zipfile.ZipFile(archive) as f:
            f.extractall()
    else:
        with tarfile.open(archive) as f:
            f.extractall()


def create_venv():
    if sys.platform == "win32":
        exe = ".exe"
        pip = "graalpy/Scripts/pip.exe"
    else:
        exe = ""
        pip = "graalpy/bin/pip"
    binary = next(iter(glob(f"graalpy-*/bin/graalpy{exe}")))
    print("Creating venv with", binary, flush=True)
    subprocess.check_call([binary, "-m", "venv", "graalpy"])
    print("Installing wheel with", pip, flush=True)
    subprocess.check_call([pip, "install", "wheel"])
    return pip


def build_wheels(pip):
    packages_selected = [s for s in os.environ.get("PACKAGES_TO_BUILD", "").split(",") if s]
    packages_to_build = set()
    with open(join(dirname(__file__), "packages.txt")) as f:
        for line in f.readlines():
            line = line.strip()
            name, version = line.split("==")
            if not packages_selected or name in packages_selected or line in packages_selected:
                packages_to_build.add(line)
    scriptdir = abspath(join(dirname(__file__), sys.platform))
    if sys.platform == "win32":
        script_ext = "bat"
    else:
        script_ext = "sh"
    if exists(scriptdir):
        available_scripts = {s.lower(): s for s in os.listdir(scriptdir)}
    else:
        available_scripts = {}
    for spec in packages_to_build:
        name, version = spec.split("==")
        whl_count = len(glob("*.whl"))
        script = f"{name}.{version}.{script_ext}".lower()
        if script not in available_scripts:
            script = f"{name}.{script_ext}".lower()
        if script in available_scripts:
            script = join(scriptdir, available_scripts[script])
            env = os.environ.copy()
            env["PATH"] = abspath(dirname(pip)) + os.pathsep + env["PATH"]
            env["VIRTUAL_ENV"] = abspath(dirname(dirname(pip)))
            print("Building", name, version, "with", script, flush=True)
            if sys.platform == "win32":
                cmd = [script, version]  # Python's subprocess.py does the quoting we need
            else:
                cmd = f"{shlex.quote(script)} {version}"
            subprocess.check_call(cmd, shell=True, env=env)
            if not len(glob("*.whl")) > whl_count:
                print("Building wheel for", name, version, "after", script, "did not", flush=True)
                subprocess.check_call([pip, "wheel", spec])
        else:
            print("Building", name, version, flush=True)
            subprocess.check_call([pip, "wheel", spec])


def repair_wheels():
    if sys.platform == "win32":
        ensure_installed("delvewheel")
        env = os.environ.copy()
        env["PYTHONUTF8"] = "1"
        subprocess.check_call(
            [
                sys.executable,
                "-m",
                "delvewheel",
                "repair",
                "-v",
                "--exclude",
                "python-native.dll",
                "-w",
                "wheelhouse",
                *glob("*.whl"),
            ],
            env=env,
        )
    elif sys.platform == "linux":
        ensure_installed("auditwheel")
        subprocess.check_call(
            [join(dirname(sys.executable), "auditwheel"), "repair", "-w", "wheelhouse", *glob("*.whl")]
        )
    elif sys.platform == "darwin":
        ensure_installed("delocate")
        subprocess.check_call(
            [join(dirname(sys.executable), "delocate-wheel"), "-v", "-w", "wheelhouse", *glob("*.whl")]
        )


if __name__ == "__main__":
    parser = ArgumentParser()
    parser.add_argument("graalpy_url")
    args = parser.parse_args()
    ext = splitext(args.graalpy_url)[1]
    outpath = f"graalpy{ext}"

    download(args.graalpy_url, outpath)
    extract(outpath)
    pip = create_venv()
    build_wheels(pip)
    repair_wheels()