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#!/usr/bin/env python3
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at
import argparse
import os
import shutil
import ssl
from pathlib import Path
from tempfile import TemporaryDirectory
from urllib import request
import certifi
import yaml
from buildconfig import topsrcdir
from vsdownload import downloadPackages, extractPackages
# Hack to hook certifi
_urlopen = request.urlopen
def urlopen(url, data=None):
return _urlopen(
url, data, context=ssl.create_default_context(cafile=certifi.where())
request.urlopen = urlopen
if __name__ == "__main__":
parser = argparse.ArgumentParser(
description="Download and build a Visual Studio artifact"
parser.add_argument("manifest", help="YAML manifest of the contents to download")
parser.add_argument("outdir", help="Output directory")
args = parser.parse_args()
out_dir = Path(args.outdir)
with open(Path(topsrcdir) / args.manifest) as f:
selected = yaml.safe_load(
with TemporaryDirectory(prefix="get_vs", dir=".") as tmpdir:
tmpdir = Path(tmpdir)
dl_cache = tmpdir / "cache"
downloadPackages(selected, dl_cache)
unpacked = tmpdir / "unpack"
extractPackages(selected, dl_cache, unpacked)
vfs = {}
# Fill the output directory with all the paths in lowercase form for
# cross-compiles.
for subpath in ("VC", "Windows Kits/10", "DIA SDK"):
dest = subpath
# When running on Windows, SDK files are extracted under Windows Kits,
# but on other platforms, they end up in Program Files/Windows Kits.
program_files_subpath = unpacked / "Program Files" / subpath
if program_files_subpath.exists():
subpath = program_files_subpath
subpath = unpacked / subpath
dest = Path(dest)
for root, dirs, files in os.walk(subpath):
relpath = Path(root).relative_to(subpath)
for f in files:
path = Path(root) / f
mode = os.stat(path).st_mode
with open(path, "rb") as fh:
lower_f = f.lower()
# Ideally, we'd use the overlay for .libs too but as of
# writing it's still impractical to use, so lowercase
# them for now, that'll be enough.
if lower_f.endswith(".lib"):
f = lower_f
name = str(dest / relpath / f)
# Set executable flag on .exe files, the Firefox build
# system wants it.
if lower_f.endswith(".exe"):
mode |= (mode & 0o444) >> 2
print("Adding", name)
out_file = out_dir / name
out_file.parent.mkdir(parents=True, exist_ok=True)
with"wb") as out_fh:
shutil.copyfileobj(fh, out_fh)
os.chmod(out_file, mode)
if lower_f.endswith((".h", ".idl")):
vfs.setdefault(str(dest / relpath), []).append(f)
# Create an overlay file for use with clang's -ivfsoverlay flag.
overlay = {
"version": 0,
"case-sensitive": False,
"root-relative": "overlay-dir",
"overlay-relative": True,
"roots": [
"name": p,
"type": "directory",
"contents": [
"name": f,
"type": "file",
"external-contents": f"{p}/{f}",
for f in files
for p, files in vfs.items()
overlay_yaml = out_dir / "overlay.yaml"
with"w") as fh: