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|
#!/usr/bin/env python
from concurrent.futures import ThreadPoolExecutor
import subprocess
import textwrap
import argparse
import toml
import json
import sys
from typing import Dict, Any, Tuple, List
class Package:
def __init__(self, attrs: Dict[str, Any]) -> None:
self.attrs = attrs
self.name = attrs["name"]
self.source = self.attrs["source"]
def fetch(self) -> Tuple["Package", subprocess.CompletedProcess]:
raise NotImplementedError()
def expression(self, output: str) -> str:
raise NotImplementedError()
class UrlPackage(Package):
def fetch(self) -> Tuple[Package, subprocess.CompletedProcess]:
return (
self,
subprocess.run(
[
"nix-prefetch-url",
"--unpack",
self.source["url"],
],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
text=True
),
)
def expression(self, output: str) -> str:
sha256 = output.rstrip()
return textwrap.dedent("""
%s = super.%s.overridePythonAttrs (
_: {
src = pkgs.fetchzip {
url = "%s";
sha256 = "%s";
};
}
);""" % (self.name, self.name, self.source["url"], sha256))
class GitPackage(Package):
def fetch(self) -> Tuple[Package, subprocess.CompletedProcess]:
reference = self.source.get("resolved_reference", self.source["reference"])
return (
self,
subprocess.run(
[
"nix-prefetch-git",
"--fetch-submodules",
"--url",
self.source["url"],
"--rev",
reference,
],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
text=True
),
)
def expression(self, output: str) -> str:
meta = json.loads(output)
return textwrap.dedent("""
%s = super.%s.overridePythonAttrs (
_: {
src = pkgs.fetchgit {
url = "%s";
rev = "%s";
sha256 = "%s";
};
}
);""" % (self.name, self.name, meta["url"], meta["rev"], meta["sha256"]))
def parse_args() -> argparse.Namespace:
argparser = argparse.ArgumentParser(description="Poetry2nix CLI")
subparsers = argparser.add_subparsers(dest="subcommand")
subparsers.required = True
parser_lock = subparsers.add_parser("lock", help="Generate overrides for git hashes",)
parser_lock.add_argument(
"--lock", default="poetry.lock", help="Path to input poetry.lock",
)
parser_lock.add_argument(
"--out", default="poetry-git-overlay.nix", help="Output file",
)
return argparser.parse_args()
def indent(expr: str, spaces: int = 2) -> str:
i = " " * spaces
return "\n".join([(i if l != "" else "") + l for l in expr.split("\n")])
def main() -> None:
args = parse_args()
with open(args.lock) as lockf:
lock = toml.load(lockf)
pkgs: List[Package] = []
for pkg in lock["package"]:
if "source" in pkg:
source_type = pkg["source"]["type"]
if source_type == "git":
pkgs.append(GitPackage(pkg))
elif source_type == "url":
pkgs.append(UrlPackage(pkg))
with ThreadPoolExecutor() as e:
futures = []
for pkg in pkgs:
futures.append(e.submit(pkg.fetch))
lines = [
"{ pkgs }:",
"self: super: {",
]
for f in futures:
package, p = f.result()
if p.returncode != 0:
sys.stderr.write(p.stderr)
sys.stderr.flush()
exit(p.returncode)
expr = package.expression(p.stdout)
lines.append(indent(expr))
lines.extend(["", "}", ""])
expr = "\n".join(lines)
with open(args.out, "w") as fout:
fout.write(expr)
print(f"Wrote {args.out}")
if __name__ == "__main__":
main()
|
