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#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0-or-later
"""
get-wraps-from-cargo-registry.py - Update Meson subprojects from a global registry
"""
# Copyright (C) 2025 Red Hat, Inc.
#
# Author: Paolo Bonzini <pbonzini@redhat.com>
import argparse
import configparser
import filecmp
import glob
import os
import subprocess
import sys
def get_name_and_semver(namever: str) -> tuple[str, str]:
"""Split a subproject name into its name and semantic version parts"""
parts = namever.rsplit("-", 1)
if len(parts) != 2:
return namever, ""
return parts[0], parts[1]
class UpdateSubprojects:
cargo_registry: str
top_srcdir: str
dry_run: bool
changes: int = 0
def find_installed_crate(self, namever: str) -> str | None:
"""Find installed crate matching name and semver prefix"""
name, semver = get_name_and_semver(namever)
# exact version match
path = os.path.join(self.cargo_registry, f"{name}-{semver}")
if os.path.exists(path):
return f"{name}-{semver}"
# semver match
matches = sorted(glob.glob(f"{path}.*"))
return os.path.basename(matches[0]) if matches else None
def compare_build_rs(self, orig_dir: str, registry_namever: str) -> None:
"""Warn if the build.rs in the original directory differs from the registry version."""
orig_build_rs = os.path.join(orig_dir, "build.rs")
new_build_rs = os.path.join(self.cargo_registry, registry_namever, "build.rs")
msg = None
if os.path.isfile(orig_build_rs) != os.path.isfile(new_build_rs):
if os.path.isfile(orig_build_rs):
msg = f"build.rs removed in {registry_namever}"
if os.path.isfile(new_build_rs):
msg = f"build.rs added in {registry_namever}"
elif os.path.isfile(orig_build_rs) and not filecmp.cmp(orig_build_rs, new_build_rs):
msg = f"build.rs changed from {orig_dir} to {registry_namever}"
if msg:
print(f"⚠️ Warning: {msg}")
print(" This may affect the build process - please review the differences.")
def update_subproject(self, wrap_file: str, registry_namever: str) -> None:
"""Modify [wrap-file] section to point to self.cargo_registry."""
assert wrap_file.endswith("-rs.wrap")
wrap_name = wrap_file[:-5]
env = os.environ.copy()
env["MESON_PACKAGE_CACHE_DIR"] = self.cargo_registry
config = configparser.ConfigParser()
config.read(wrap_file)
if "wrap-file" not in config:
return
# do not download the wrap, always use the local copy
orig_dir = config["wrap-file"]["directory"]
if os.path.exists(orig_dir) and orig_dir != registry_namever:
self.compare_build_rs(orig_dir, registry_namever)
if self.dry_run:
if orig_dir == registry_namever:
print(f"Will install {orig_dir} from registry.")
else:
print(f"Will replace {orig_dir} with {registry_namever}.")
self.changes += 1
return
config["wrap-file"]["directory"] = registry_namever
for key in list(config["wrap-file"].keys()):
if key.startswith("source"):
del config["wrap-file"][key]
# replace existing directory with installed version
if os.path.exists(orig_dir):
subprocess.run(
["meson", "subprojects", "purge", "--confirm", wrap_name],
cwd=self.top_srcdir,
env=env,
check=True,
)
with open(wrap_file, "w") as f:
config.write(f)
if orig_dir == registry_namever:
print(f"Installing {orig_dir} from registry.")
else:
print(f"Replacing {orig_dir} with {registry_namever}.")
patch_dir = config["wrap-file"]["patch_directory"]
patch_dir = os.path.join("packagefiles", patch_dir)
_, ver = registry_namever.rsplit("-", 1)
subprocess.run(
["meson", "rewrite", "kwargs", "set", "project", "/", "version", ver],
cwd=patch_dir,
env=env,
check=True,
)
subprocess.run(
["meson", "subprojects", "download", wrap_name],
cwd=self.top_srcdir,
env=env,
check=True,
)
self.changes += 1
@staticmethod
def parse_cmdline() -> argparse.Namespace:
parser = argparse.ArgumentParser(
description="Replace Meson subprojects with packages in a Cargo registry"
)
parser.add_argument(
"--cargo-registry",
default=os.environ.get("CARGO_REGISTRY"),
help="Path to Cargo registry (default: CARGO_REGISTRY env var)",
)
parser.add_argument(
"--dry-run",
action="store_true",
default=False,
help="Do not actually replace anything",
)
args = parser.parse_args()
if not args.cargo_registry:
print("error: CARGO_REGISTRY environment variable not set and --cargo-registry not provided")
sys.exit(1)
return args
def __init__(self, args: argparse.Namespace):
self.cargo_registry = args.cargo_registry
self.dry_run = args.dry_run
self.top_srcdir = os.getcwd()
def main(self) -> None:
if not os.path.exists("subprojects"):
print("'subprojects' directory not found, nothing to do.")
return
os.chdir("subprojects")
for wrap_file in sorted(glob.glob("*-rs.wrap")):
namever = wrap_file[:-8] # Remove '-rs.wrap'
registry_namever = self.find_installed_crate(namever)
if not registry_namever:
print(f"No installed crate found for {wrap_file}")
continue
self.update_subproject(wrap_file, registry_namever)
if self.changes:
if self.dry_run:
print("Rerun without --dry-run to apply changes.")
else:
print(f"✨ {self.changes} subproject(s) updated!")
else:
print("No changes.")
if __name__ == "__main__":
args = UpdateSubprojects.parse_cmdline()
UpdateSubprojects(args).main()
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