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update-versions.py
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update-versions.py
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import argparse
import collections
import functools
import itertools
import json
import os
import pathlib
import subprocess
from dataclasses import dataclass
from pathlib import Path
from typing import (
Callable,
Iterable,
List,
Optional,
OrderedDict,
)
import github
from github.GitRelease import GitRelease
from semver import Version as SemVer
@dataclass
class NixHashes:
hash: str
vendorHash: str
Versions = OrderedDict[SemVer, NixHashes]
def parse_semver(input: str) -> SemVer:
return SemVer.parse(input.removeprefix("v"))
def read_current_versions(file: Path) -> Versions:
with open(file, "r") as f:
data = json.load(f)
versions = data["releases"]
result: OrderedDict[SemVer, NixHashes] = OrderedDict()
for key_raw, value_raw in versions.items():
key = parse_semver(key_raw)
result[key] = NixHashes(
hash=value_raw["hash"], vendorHash=value_raw["vendorHash"]
)
return result
def get_stable_github_versions(releases: Iterable[GitRelease]) -> List[SemVer]:
stable_version = SemVer(1, 0, 0)
def to_semver(release: GitRelease) -> SemVer:
return parse_semver(release.tag_name)
def is_stable(release: GitRelease) -> bool:
return to_semver(release) >= stable_version and not (
release.draft or release.prerelease
)
return list(map(to_semver, filter(is_stable, releases)))
def get_latest_versions_per_cycle(
versions: collections.OrderedDict,
) -> collections.OrderedDict:
grouped_versions = itertools.groupby(versions, key=lambda v: f"{v.major}.{v.minor}")
latest_versions = {k: max(list(g)) for k, g in grouped_versions}
return collections.OrderedDict(sorted(latest_versions.items(), reverse=True))
def get_or_calculate_hashes(
vendor_hash_nix: Path,
) -> Callable[[Versions, SemVer], Versions]:
def add_version(
current_versions: Versions,
new_version: SemVer,
) -> Versions:
maybe_current_hashes = current_versions.get(new_version)
calculated_hash = calculate_hash(new_version, maybe_current_hashes)
calculated_vendor_hash = calculate_vendor_hash(
new_version, maybe_current_hashes, calculated_hash, vendor_hash_nix
)
to_upsert = NixHashes(hash=calculated_hash, vendorHash=calculated_vendor_hash)
current_versions[new_version] = to_upsert
return current_versions
return add_version
def calculate_hash(version: SemVer, maybe_current_hashes: Optional[NixHashes]) -> str:
if maybe_current_hashes:
print(f"Using existing hash for {version}")
return maybe_current_hashes.hash
else:
print(f"Calculating hash for {version}")
return nix_prefetch(
[
"fetchFromGitHub",
"--owner",
"hashicorp",
"--repo",
"terraform",
"--rev",
f"v{version}",
]
)
def calculate_vendor_hash(
version: SemVer,
maybe_current_hashes: Optional[NixHashes],
calculated_hash: str,
vendor_hash_nix: Path,
) -> str:
if maybe_current_hashes:
print(f"Using existing vendorHash for {version}")
return maybe_current_hashes.vendorHash
else:
print(f"Calculating vendorHash for {version}")
return nix_prefetch(
[
"--file",
str(vendor_hash_nix.resolve()),
"--argstr",
"version",
str(version),
"--argstr",
"hash",
calculated_hash,
]
)
def nix_prefetch(args: Iterable[str]) -> str:
return subprocess.check_output(
[
"nix-prefetch",
"--silent",
"--option",
"extra-experimental-features",
"flakes",
*args,
],
text=True,
).strip()
def main():
parser = argparse.ArgumentParser(description="Update versions.json file")
parser.add_argument(
"--vendor_hash",
type=pathlib.Path,
default="vendor-hash.nix",
help="Path to vendor-hash.nix file",
)
args = parser.parse_args()
gh_token = github.Auth.Token(os.environ["GITHUB_TOKEN"])
gh = github.Github(auth=gh_token)
repo = gh.get_repo("hashicorp/terraform")
versions_file = Path("versions.json")
gh_releases = repo.get_releases()
stable_gh_versions = get_stable_github_versions(gh_releases)
current_versions = read_current_versions(versions_file)
versions = collections.OrderedDict(
sorted(
functools.reduce(
get_or_calculate_hashes(args.vendor_hash),
stable_gh_versions,
current_versions,
).items(),
reverse=True,
)
)
latest_versions_per_cycle = get_latest_versions_per_cycle(versions)
versions_jsonified = OrderedDict(
(str(version), hashes.__dict__) for version, hashes in versions.items()
)
latest_versions_jsonified = OrderedDict(
(str(cycle), str(latest_version))
for cycle, latest_version in latest_versions_per_cycle.items()
)
with open(versions_file, "w") as f:
json.dump(
{"releases": versions_jsonified, "latest": latest_versions_jsonified},
f,
indent=2,
)
if __name__ == "__main__":
main()