buildbot-nix/buildbot_nix/master.py

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2023-09-10 08:11:56 +00:00
#!/usr/bin/env python3
import json
import os
import sys
from datetime import timedelta
from pathlib import Path
from typing import Any
from buildbot.plugins import reporters, schedulers, secrets, util, worker
from buildbot.process.project import Project
from buildbot.process.properties import Interpolate
# allow to import modules
sys.path.append(str(Path(__file__).parent))
from buildbot_nix import ( # noqa: E402
nix_build_config,
nix_eval_config,
nix_update_flake_config,
)
from github_projects import GithubProject, load_projects # noqa: E402
from irc_notify import NotifyFailedBuilds # noqa: E402
def read_secret_file(secret_name: str) -> str:
directory = os.environ.get("CREDENTIALS_DIRECTORY")
if directory is None:
print("directory not set", file=sys.stderr)
sys.exit(1)
return Path(directory).joinpath(secret_name).read_text()
GITHUB_OAUTH_ID = os.environ.get("GITHUB_OAUTH_ID")
GITHUB_OAUTH_SECRET = read_secret_file("github-oauth-secret")
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GITHUB_ADMINS = os.environ.get("GITHUB_ADMINS", "").split(" ")
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GITHUB_TOKEN_SECRET_NAME = "github-token"
GITHUB_TOKEN = read_secret_file(GITHUB_TOKEN_SECRET_NAME)
GITHUB_WEBHOOK_SECRET = read_secret_file("github-webhook-secret")
# Shape of this file:
# [ { "name": "<worker-name>", "pass": "<worker-password>", "cores": "<cpu-cores>" } ]
BUILDBOT_NIX_WORKERS = read_secret_file("buildbot-nix-workers")
REPO_FOR_FLAKE_UPDATE = os.environ["REPO_FOR_FLAKE_UPDATE"]
BUILDBOT_URL = os.environ["BUILDBOT_URL"]
BUILDBOT_GITHUB_USER = os.environ["BUILDBOT_GITHUB_USER"]
NIX_SUPPORTED_SYSTEMS = os.environ["NIX_SUPPORTED_SYSTEMS"].split(" ")
NIX_EVAL_MAX_MEMORY_SIZE = int(os.environ.get("NIX_EVAL_MAX_MEMORY_SIZE", "4096"))
def config_for_project(
config: dict[str, Any],
project: GithubProject,
credentials: str,
worker_names: list[str],
) -> Project:
config["projects"].append(Project(project.name))
config["schedulers"].extend(
[
schedulers.SingleBranchScheduler(
name=f"default-branch-{project.id}",
change_filter=util.ChangeFilter(
repository=project.url,
filter_fn=lambda c: c.branch
== c.properties.getProperty("github.repository.default_branch"),
),
builderNames=[f"{project.name}/nix-eval"],
),
# this is compatible with bors or github's merge queue
schedulers.SingleBranchScheduler(
name=f"merge-queue-{project.id}",
change_filter=util.ChangeFilter(
repository=project.url,
branch_re="(gh-readonly-queue/.*|staging|trying)",
),
builderNames=[f"{project.name}/nix-eval"],
),
# build all pull requests
schedulers.SingleBranchScheduler(
name=f"prs-{project.id}",
change_filter=util.ChangeFilter(
repository=project.url, category="pull"
),
builderNames=[f"{project.name}/nix-eval"],
),
# this is triggered from `nix-eval`
schedulers.Triggerable(
name=f"{project.id}-nix-build",
builderNames=[f"{project.name}/nix-build"],
),
# allow to manually trigger a nix-build
schedulers.ForceScheduler(
name=f"{project.id}-force", builderNames=[f"{project.name}/nix-eval"]
),
# allow to manually update flakes
schedulers.ForceScheduler(
name=f"{project.id}-update-flake",
builderNames=[f"{project.name}/update-flake"],
buttonName="Update flakes",
),
# updates flakes once a weeek
schedulers.NightlyTriggerable(
name=f"{project.id}-update-flake-weekly",
builderNames=[f"{project.name}/update-flake"],
hour=3,
minute=0,
dayOfWeek=6,
),
]
)
has_cachix_auth_token = os.path.isfile(
os.path.join(credentials, "cachix-auth-token")
)
has_cachix_signing_key = os.path.isfile(
os.path.join(credentials, "cachix-signing-key")
)
config["builders"].extend(
[
# Since all workers run on the same machine, we only assign one of them to do the evaluation.
# This should prevent exessive memory usage.
nix_eval_config(
project,
[worker_names[0]],
github_token_secret=GITHUB_TOKEN_SECRET_NAME,
supported_systems=NIX_SUPPORTED_SYSTEMS,
automerge_users=[BUILDBOT_GITHUB_USER],
max_memory_size=NIX_EVAL_MAX_MEMORY_SIZE,
),
nix_build_config(
project,
worker_names,
has_cachix_auth_token,
has_cachix_signing_key,
),
nix_update_flake_config(
project,
worker_names,
github_token_secret=GITHUB_TOKEN_SECRET_NAME,
github_bot_user=BUILDBOT_GITHUB_USER,
),
]
)
PROJECT_CACHE_FILE = Path("github-project-cache.json")
def build_config() -> dict[str, Any]:
projects = load_projects(GITHUB_TOKEN, PROJECT_CACHE_FILE)
projects = [p for p in projects if "build-with-buildbot" in p.topics]
import pprint
pprint.pprint(projects)
c: dict[str, Any] = {}
c["buildbotNetUsageData"] = None
# configure a janitor which will delete all logs older than one month, and will run on sundays at noon
c["configurators"] = [
util.JanitorConfigurator(logHorizon=timedelta(weeks=4), hour=12, dayOfWeek=6)
]
credentials = os.environ.get("CREDENTIALS_DIRECTORY", ".")
c["schedulers"] = [
schedulers.SingleBranchScheduler(
name="nixpkgs",
change_filter=util.ChangeFilter(
repository_re=r"https://github\.com/.*/nixpkgs",
filter_fn=lambda c: c.branch
== c.properties.getProperty("github.repository.default_branch"),
),
treeStableTimer=20,
builderNames=["Mic92/dotfiles/update-flake"],
),
]
c["builders"] = []
c["projects"] = []
c["workers"] = []
worker_config = json.loads(BUILDBOT_NIX_WORKERS)
worker_names = []
for item in worker_config:
cores = item.get("cores", 0)
for i in range(cores):
worker_name = f"{item['name']}-{i}"
c["workers"].append(worker.Worker(worker_name, item["pass"]))
worker_names.append(worker_name)
for project in projects:
config_for_project(c, project, credentials, worker_names)
c["services"] = [
reporters.GitHubStatusPush(
token=GITHUB_TOKEN,
# Since we dynamically create build steps,
# we use `virtual_builder_name` in the webinterface
# so that we distinguish what has beeing build
context=Interpolate("buildbot/%(prop:status_name)s"),
),
# Notify on irc
NotifyFailedBuilds("irc://buildbot|mic92@irc.r:6667/#xxx"),
]
systemd_secrets = secrets.SecretInAFile(dirname=credentials)
c["secretsProviders"] = [systemd_secrets]
c["www"] = {
"avatar_methods": [util.AvatarGitHub()],
"port": int(os.environ.get("PORT", "1810")),
"auth": util.GitHubAuth(GITHUB_OAUTH_ID, GITHUB_OAUTH_SECRET),
"authz": util.Authz(
roleMatchers=[
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util.RolesFromUsername(roles=["admin"], usernames=GITHUB_ADMINS)
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],
allowRules=[
util.AnyEndpointMatcher(role="admin", defaultDeny=False),
util.AnyControlEndpointMatcher(role="admins"),
],
),
"plugins": dict(
base_react={}, waterfall_view={}, console_view={}, grid_view={}
),
"change_hook_dialects": dict(
github={
"secret": GITHUB_WEBHOOK_SECRET,
"strict": True,
"token": GITHUB_TOKEN,
"github_property_whitelist": "*",
}
),
}
c["db"] = {"db_url": os.environ.get("DB_URL", "sqlite:///state.sqlite")}
c["protocols"] = {"pb": {"port": "tcp:9989:interface=\\:\\:"}}
c["buildbotURL"] = BUILDBOT_URL
return c
BuildmasterConfig = build_config()