1 files changed, 174 insertions, 0 deletions
diff --git a/infra/libkookie/nixpkgs/pkgs/games/factorio/update.py b/infra/libkookie/nixpkgs/pkgs/games/factorio/update.py
new file mode 100755
index 000000000000..b1cdce6b4aa1
--- /dev/null
+++ b/infra/libkookie/nixpkgs/pkgs/games/factorio/update.py
@@ -0,0 +1,174 @@
+#!/usr/bin/env nix-shell
+#! nix-shell -i python -p "python3.withPackages (ps: with ps; [ ps.absl-py ps.requests ])" nix
+
+from collections import defaultdict
+import copy
+from dataclasses import dataclass
+import json
+import os.path
+import subprocess
+from typing import Callable, Dict
+
+from absl import app
+from absl import flags
+from absl import logging
+import requests
+
+
+FACTORIO_API = "https://factorio.com/api/latest-releases"
+
+
+FLAGS = flags.FLAGS
+
+flags.DEFINE_string('username', '', 'Factorio username for retrieving binaries.')
+flags.DEFINE_string('token', '', 'Factorio token for retrieving binaries.')
+flags.DEFINE_string('out', '', 'Output path for versions.json.')
+
+
+@dataclass
+class System:
+    nix_name: str
+    url_name: str
+    tar_name: str
+
+
+@dataclass
+class ReleaseType:
+    name: str
+    needs_auth: bool = False
+
+
+@dataclass
+class ReleaseChannel:
+    name: str
+
+
+FactorioVersionsJSON = Dict[str, Dict[str, str]]
+OurVersionJSON = Dict[str, Dict[str, Dict[str, Dict[str, str]]]]
+
+
+SYSTEMS = [
+    System(nix_name="x86_64-linux", url_name="linux64", tar_name="x64"),
+]
+
+RELEASE_TYPES = [
+    ReleaseType("alpha", needs_auth=True),
+    ReleaseType("demo"),
+    ReleaseType("headless"),
+]
+
+RELEASE_CHANNELS = [
+    ReleaseChannel("experimental"),
+    ReleaseChannel("stable"),
+]
+
+
+def find_versions_json() -> str:
+    if FLAGS.out:
+        return out
+    try_paths = ["pkgs/games/factorio/versions.json", "versions.json"]
+    for path in try_paths:
+        if os.path.exists(path):
+            return path
+    raise Exception("Couldn't figure out where to write versions.json; try specifying --out")
+
+
+def fetch_versions() -> FactorioVersionsJSON:
+    return json.loads(requests.get("https://factorio.com/api/latest-releases").text)
+
+
+def generate_our_versions(factorio_versions: FactorioVersionsJSON) -> OurVersionJSON:
+    rec_dd = lambda: defaultdict(rec_dd)
+    output = rec_dd()
+    for system in SYSTEMS:
+        for release_type in RELEASE_TYPES:
+            for release_channel in RELEASE_CHANNELS:
+                version = factorio_versions[release_channel.name][release_type.name]
+                this_release = {
+                    "name":         f"factorio_{release_type.name}_{system.tar_name}-{version}.tar.xz",
+                    "url":          f"https://factorio.com/get-download/{version}/{release_type.name}/{system.url_name}",
+                    "version":      version,
+                    "needsAuth":    release_type.needs_auth,
+                    "tarDirectory": system.tar_name,
+                }
+                output[system.nix_name][release_type.name][release_channel.name] = this_release
+    return output
+
+
+def iter_version(versions: OurVersionJSON, it: Callable[[str, str, str, Dict[str, str]], Dict[str, str]]) -> OurVersionJSON:
+    versions = copy.deepcopy(versions)
+    for system_name, system in versions.items():
+        for release_type_name, release_type in system.items():
+            for release_channel_name, release in release_type.items():
+                release_type[release_channel_name] = it(system_name, release_type_name, release_channel_name, dict(release))
+    return versions
+
+
+def merge_versions(old: OurVersionJSON, new: OurVersionJSON) -> OurVersionJSON:
+    """Copies already-known hashes from version.json to avoid having to re-fetch."""
+    def _merge_version(system_name: str, release_type_name: str, release_channel_name: str, release: Dict[str, str]) -> Dict[str, str]:
+        old_system = old.get(system_name, {})
+        old_release_type = old_system.get(release_type_name, {})
+        old_release = old_release_type.get(release_channel_name, {})
+        if not "sha256" in old_release:
+            logging.info("%s/%s/%s: not copying sha256 since it's missing", system_name, release_type_name, release_channel_name)
+            return release
+        if not all(old_release.get(k, None) == release[k] for k in ['name', 'version', 'url']):
+            logging.info("%s/%s/%s: not copying sha256 due to mismatch", system_name, release_type_name, release_channel_name)
+            return release
+        release["sha256"] = old_release["sha256"]
+        return release
+    return iter_version(new, _merge_version)
+
+
+def nix_prefetch_url(name: str, url: str, algo: str = 'sha256') -> str:
+    cmd = ['nix-prefetch-url', '--type', algo, '--name', name, url]
+    logging.info('running %s', cmd)
+    out = subprocess.check_output(cmd)
+    return out.decode('utf-8').strip()
+
+
+def fill_in_hash(versions: OurVersionJSON) -> OurVersionJSON:
+    """Fill in sha256 hashes for anything missing them."""
+    urls_to_hash = {}
+    def _fill_in_hash(system_name: str, release_type_name: str, release_channel_name: str, release: Dict[str, str]) -> Dict[str, str]:
+        if "sha256" in release:
+            logging.info("%s/%s/%s: skipping fetch, sha256 already present", system_name, release_type_name, release_channel_name)
+            return release
+        url = release["url"]
+        if url in urls_to_hash:
+            logging.info("%s/%s/%s: found url %s in cache", system_name, release_type_name, release_channel_name, url)
+            release["sha256"] = urls_to_hash[url]
+            return release
+        logging.info("%s/%s/%s: fetching %s", system_name, release_type_name, release_channel_name, url)
+        if release["needsAuth"]:
+            if not FLAGS.username or not FLAGS.token:
+                raise Exception("fetching %s/%s/%s from %s requires --username and --token" % (system_name, release_type_name, release_channel_name, url))
+            url += f"?username={FLAGS.username}&token={FLAGS.token}"
+        release["sha256"] = nix_prefetch_url(release["name"], url)
+        urls_to_hash[url] = release["sha256"]
+        return release
+    return iter_version(versions, _fill_in_hash)
+
+
+def main(argv):
+    factorio_versions = fetch_versions()
+    new_our_versions = generate_our_versions(factorio_versions)
+    old_our_versions = None
+    our_versions_path = find_versions_json()
+    if our_versions_path:
+        logging.info('Loading old versions.json from %s', our_versions_path)
+        with open(our_versions_path, 'r') as f:
+            old_our_versions = json.load(f)
+    if old_our_versions:
+        logging.info('Merging in old hashes')
+        new_our_versions = merge_versions(old_our_versions, new_our_versions)
+    logging.info('Fetching necessary tars to get hashes')
+    new_our_versions = fill_in_hash(new_our_versions)
+    with open(our_versions_path, 'w') as f:
+        logging.info('Writing versions.json to %s', our_versions_path)
+        json.dump(new_our_versions, f, sort_keys=True, indent=2)
+        f.write("\n")
+
+if __name__ == '__main__':
+    app.run(main)