lix/meson/cargo-lock-to-wraps.py

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#!/usr/bin/env python3
import argparse
import tomllib
import sys
DOWNLOAD_URI_FORMAT = 'https://crates.io/api/v1/crates/{crate}/{version}/download'
WRAP_TEMPLATE = """
[wrap-file]
method = cargo
directory = {crate}-{version}
source_url = {url}
source_filename = {crate}-{version}.tar.gz
source_hash = {hash}
""".lstrip()
parser = argparse.ArgumentParser()
parser.add_argument('lockfile', help='path to the Cargo lockfile to generate wraps from')
parser.add_argument('outdir', help="the 'subprojects' directory to write .wrap files to")
args = parser.parse_args()
with open(args.lockfile, 'rb') as f:
lock_toml = tomllib.load(f)
for dependency in lock_toml['package']:
try:
hash = dependency['checksum']
except KeyError:
# The base package, e.g. lix-doc, won't have a checksum, and conveniently
# the base package is also not something we want a wrap file for.
# Doesn't that work out nicely?
continue
crate = dependency['name']
version = dependency['version']
url = DOWNLOAD_URI_FORMAT.format(crate=crate, version=version)
wrap_text = WRAP_TEMPLATE.format(crate=crate, version=version, url=url, hash=hash)
with open(f'{args.outdir}/{crate}-rs.wrap', 'w') as f:
f.write(wrap_text)