zulip/scripts/lib/puppet_cache.py

103 lines
3.4 KiB
Python

import hashlib
import json
import os
import shutil
import subprocess
import tempfile
from urllib.request import urlopen
import yaml
from .zulip_tools import run
ZULIP_PATH = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
ZULIP_SRV_PATH = "/srv"
PUPPET_MODULES_CACHE_PATH = os.path.join(ZULIP_SRV_PATH, "zulip-puppet-cache")
PUPPET_DEPS_FILE_PATH = os.path.join(ZULIP_PATH, "puppet/deps.yaml")
PUPPET_THIRDPARTY = os.path.join(PUPPET_MODULES_CACHE_PATH, "current")
def generate_sha1sum_puppet_modules() -> str:
data = {}
with open(PUPPET_DEPS_FILE_PATH) as fb:
data["deps.yaml"] = fb.read().strip()
data["puppet-version"] = subprocess.check_output(
# This is 10x faster than `puppet --version`
["ruby", "-r", "puppet/version", "-e", "puts Puppet.version"],
text=True,
).strip()
sha1sum = hashlib.sha1()
sha1sum.update(json.dumps(data, sort_keys=True).encode())
return sha1sum.hexdigest()
def setup_puppet_modules() -> None:
sha1sum = generate_sha1sum_puppet_modules()
target_path = os.path.join(PUPPET_MODULES_CACHE_PATH, sha1sum)
success_stamp = os.path.join(target_path, ".success-stamp")
# Check if a cached version already exists
if not os.path.exists(success_stamp):
do_puppet_module_install(target_path, success_stamp)
if os.path.islink(PUPPET_THIRDPARTY):
os.remove(PUPPET_THIRDPARTY)
elif os.path.isdir(PUPPET_THIRDPARTY):
shutil.rmtree(PUPPET_THIRDPARTY)
os.symlink(target_path, PUPPET_THIRDPARTY)
def do_puppet_module_install(
target_path: str,
success_stamp: str,
) -> None:
os.makedirs(target_path, exist_ok=True)
with open(PUPPET_DEPS_FILE_PATH) as yaml_file:
deps = yaml.safe_load(yaml_file)
for module, metadata in deps.items():
install_puppet_module(target_path, module, metadata["version"], metadata["sha256sum"])
with open(success_stamp, "w"):
pass
def install_puppet_module(
target_path: str, module: str, version: str, expected_sha256sum: str
) -> None:
with urlopen(f"https://forgeapi.puppet.com/v3/releases/{module}-{version}") as forge_resp:
forge_data = json.load(forge_resp)
forge_sha256sum = forge_data["file_sha256"]
if forge_sha256sum != expected_sha256sum:
raise Exception(
f"Forge API returned unexpected SHA256 sum for {module}-{version}: "
f"expected {expected_sha256sum}, got {forge_sha256sum}"
)
with tempfile.NamedTemporaryFile(
prefix=f"zulip-puppet-{module}-{version}-",
suffix=".tar.gz",
) as tarball:
with urlopen("https://forgeapi.puppet.com" + forge_data["file_uri"]) as tarball_resp:
tarball_content = tarball_resp.read()
local_sha256sum = hashlib.sha256(tarball_content).hexdigest()
if local_sha256sum != expected_sha256sum:
raise Exception(
f"Downloaded file had unexpected SHA256 sum for {module}-{version}: "
f"expected {expected_sha256sum}, got {forge_sha256sum}"
)
tarball.write(tarball_content)
tarball.flush()
run(
[
"puppet",
"module",
"--modulepath",
target_path,
"install",
tarball.name,
"--ignore-dependencies",
],
)