226 lines
7.4 KiB
Python
Executable file
226 lines
7.4 KiB
Python
Executable file
#! /usr/bin/env python3
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from itertools import chain
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import json
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import logging
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from pathlib import Path
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import os
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import re
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import subprocess
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import sys
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from typing import Dict, List, Optional, Set, TextIO
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from urllib.request import urlopen
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from urllib.error import HTTPError
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import yaml
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PKG_SET = "pkgs.python3Packages"
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# If some requirements are matched by multiple or no Python packages, the
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# following can be used to choose the correct one
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PKG_PREFERENCES = {
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"dnspython": "dnspython",
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"google-api-python-client": "google-api-python-client",
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"psycopg2-binary": "psycopg2",
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"requests_toolbelt": "requests-toolbelt",
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}
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# Requirements missing from the airflow provider metadata
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EXTRA_REQS = {
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"sftp": ["pysftp"],
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}
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def get_version():
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with open(os.path.dirname(sys.argv[0]) + "/default.nix") as fh:
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# A version consists of digits, dots, and possibly a "b" (for beta)
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m = re.search('version = "([\\d\\.b]+)";', fh.read())
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return m.group(1)
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def get_file_from_github(version: str, path: str):
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with urlopen(
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f"https://raw.githubusercontent.com/apache/airflow/{version}/{path}"
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) as response:
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return yaml.safe_load(response)
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def repository_root() -> Path:
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return Path(os.path.dirname(sys.argv[0])) / "../../../.."
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def dump_packages() -> Dict[str, Dict[str, str]]:
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# Store a JSON dump of Nixpkgs' python3Packages
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output = subprocess.check_output(
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[
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"nix-env",
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"-f",
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repository_root(),
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"-qa",
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"-A",
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PKG_SET,
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"--arg",
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"config",
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"{ allowAliases = false; }",
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"--json",
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]
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)
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return json.loads(output)
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def remove_version_constraint(req: str) -> str:
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return re.sub(r"[=><~].*$", "", req)
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def name_to_attr_path(req: str, packages: Dict[str, Dict[str, str]]) -> Optional[str]:
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if req in PKG_PREFERENCES:
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return f"{PKG_SET}.{PKG_PREFERENCES[req]}"
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attr_paths = []
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names = [req]
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# E.g. python-mpd2 is actually called python3.6-mpd2
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# instead of python-3.6-python-mpd2 inside Nixpkgs
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if req.startswith("python-") or req.startswith("python_"):
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names.append(req[len("python-") :])
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for name in names:
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# treat "-" and "_" equally
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name = re.sub("[-_]", "[-_]", name)
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# python(minor).(major)-(pname)-(version or unstable-date)
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# we need the version qualifier, or we'll have multiple matches
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# (e.g. pyserial and pyserial-asyncio when looking for pyserial)
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pattern = re.compile(
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f"^python\\d+\\.\\d+-{name}-(?:\\d|unstable-.*)", re.I
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)
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for attr_path, package in packages.items():
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# logging.debug("Checking match for %s with %s", name, package["name"])
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if pattern.match(package["name"]):
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attr_paths.append(attr_path)
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# Let's hope there's only one derivation with a matching name
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assert len(attr_paths) <= 1, f"{req} matches more than one derivation: {attr_paths}"
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if attr_paths:
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return attr_paths[0]
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return None
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def provider_reqs_to_attr_paths(reqs: List, packages: Dict) -> List:
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no_version_reqs = map(remove_version_constraint, reqs)
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filtered_reqs = [
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req for req in no_version_reqs if not re.match(r"^apache-airflow", req)
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]
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attr_paths = []
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for req in filtered_reqs:
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attr_path = name_to_attr_path(req, packages)
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if attr_path is not None:
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# Add attribute path without "python3Packages." prefix
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pname = attr_path[len(PKG_SET + ".") :]
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attr_paths.append(pname)
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else:
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# If we can't find it, we just skip and warn the user
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logging.warning("Could not find package attr for %s", req)
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return attr_paths
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def get_cross_provider_reqs(
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provider: str, provider_reqs: Dict, cross_provider_deps: Dict, seen: List = None
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) -> Set:
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# Unfortunately there are circular cross-provider dependencies, so keep a
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# list of ones we've seen already
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seen = seen or []
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reqs = set(provider_reqs[provider])
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if len(cross_provider_deps[provider]) > 0:
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reqs.update(
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chain.from_iterable(
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get_cross_provider_reqs(
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d, provider_reqs, cross_provider_deps, seen + [provider]
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)
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if d not in seen
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else []
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for d in cross_provider_deps[provider]
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)
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)
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return reqs
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def get_provider_reqs(version: str, packages: Dict) -> Dict:
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provider_dependencies = get_file_from_github(
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version, "generated/provider_dependencies.json"
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)
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provider_reqs = {}
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cross_provider_deps = {}
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for provider, provider_data in provider_dependencies.items():
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provider_reqs[provider] = list(
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provider_reqs_to_attr_paths(provider_data["deps"], packages)
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) + EXTRA_REQS.get(provider, [])
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cross_provider_deps[provider] = [
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d for d in provider_data["cross-providers-deps"] if d != "common.sql"
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]
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transitive_provider_reqs = {}
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# Add transitive cross-provider reqs
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for provider in provider_reqs:
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transitive_provider_reqs[provider] = get_cross_provider_reqs(
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provider, provider_reqs, cross_provider_deps
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)
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return transitive_provider_reqs
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def get_provider_yaml(version: str, provider: str) -> Dict:
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provider_dir = provider.replace(".", "/")
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path = f"airflow/providers/{provider_dir}/provider.yaml"
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try:
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return get_file_from_github(version, path)
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except HTTPError:
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logging.warning("Couldn't get provider yaml for %s", provider)
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return {}
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def get_provider_imports(version: str, providers) -> Dict:
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provider_imports = {}
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for provider in providers:
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provider_yaml = get_provider_yaml(version, provider)
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imports: List[str] = []
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if "hooks" in provider_yaml:
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imports.extend(
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chain.from_iterable(
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hook["python-modules"] for hook in provider_yaml["hooks"]
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)
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)
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if "operators" in provider_yaml:
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imports.extend(
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chain.from_iterable(
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operator["python-modules"]
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for operator in provider_yaml["operators"]
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)
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)
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provider_imports[provider] = imports
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return provider_imports
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def to_nix_expr(provider_reqs: Dict, provider_imports: Dict, fh: TextIO) -> None:
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fh.write("# Warning: generated by update-providers.py, do not update manually\n")
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fh.write("{\n")
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for provider, reqs in provider_reqs.items():
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provider_name = provider.replace(".", "_")
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fh.write(f" {provider_name} = {{\n")
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fh.write(
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" deps = [ " + " ".join(sorted(f'"{req}"' for req in reqs)) + " ];\n"
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)
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fh.write(
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" imports = [ "
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+ " ".join(sorted(f'"{imp}"' for imp in provider_imports[provider]))
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+ " ];\n"
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)
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fh.write(" };\n")
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fh.write("}\n")
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def main() -> None:
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logging.basicConfig(level=logging.INFO)
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version = get_version()
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packages = dump_packages()
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logging.info("Generating providers.nix for version %s", version)
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provider_reqs = get_provider_reqs(version, packages)
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provider_imports = get_provider_imports(version, provider_reqs.keys())
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with open("providers.nix", "w") as fh:
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to_nix_expr(provider_reqs, provider_imports, fh)
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if __name__ == "__main__":
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main()
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