452 lines
15 KiB
Python
452 lines
15 KiB
Python
import argparse
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import base64
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import datetime
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import difflib
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import json
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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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import urllib.request
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from collections import Counter
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from pathlib import Path
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def run(*args, **kw):
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return subprocess.run(args, text=True, **kw)
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def nix(*args):
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return run("nix", "--extra-experimental-features", "nix-command flakes", *args, check=True, capture_output=True).stdout
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def git(*args, check=True):
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return run("git", *args, check=check, capture_output=True)
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def gitea(method, path, body=None):
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url = f'{os.environ["API"]}/repos/{os.environ["REPO"]}{path}'
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data = json.dumps(body).encode() if body is not None else None
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req = urllib.request.Request(url, data=data, method=method)
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req.add_header("Authorization", f'token {os.environ["GH_TOKEN"]}')
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if data is not None:
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req.add_header("Content-Type", "application/json")
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with urllib.request.urlopen(req) as resp:
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raw = resp.read()
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return json.loads(raw) if raw else None
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def find_open_issue(label):
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issues = gitea("GET", f"/issues?state=open&labels={label}")
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return issues[0] if issues else None
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def build_hosts(ref):
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hosts = json.loads(nix("eval", "--json", f"{ref}#nixosConfigurations", "--apply", "builtins.attrNames"))
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return {
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host: nix("build", f"{ref}#nixosConfigurations.{host}.config.system.build.toplevel",
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"--no-link", "--print-out-paths").strip()
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for host in hosts
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}
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def diff(args):
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old, new = build_hosts(args.old), build_hosts(args.new)
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def section(host):
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if host not in old:
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return f"## {host}\n\n_new host_"
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if host not in new:
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return f"## {host}\n\n_host removed_"
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rendered = run("dix", "--color", "never", old[host], new[host], capture_output=True).stdout
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return f"## {host}\n\n```\n{rendered}```"
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parts = ([args.title] if args.title else []) + [section(h) for h in sorted(set(old) | set(new))]
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print("\n\n".join(parts))
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# meta.toplevel is the closure path dix already covers; nftables.ruleset/tables
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# are duplicated by nftables.rendered (the assembled ruleset we keep and diff).
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# Pruned so inspect-diff reports only source config topology, once.
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INSPECT_PRUNE = [
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("meta", "toplevel"),
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("nftables", "ruleset"),
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("nftables", "tables"),
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]
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def compact(value):
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return json.dumps(value, sort_keys=True)
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def scalar(value):
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if value is None:
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return "null"
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if isinstance(value, bool):
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return "true" if value else "false"
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return str(value)
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def fmt(value, indent=0):
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pad = " " * indent
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lines = []
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if isinstance(value, dict):
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for key in sorted(value):
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child = value[key]
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if isinstance(child, (dict, list)) and child:
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lines.append(f"{pad}{key}:")
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lines += fmt(child, indent + 1)
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else:
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lines.append(f"{pad}{key}: {scalar(child)}")
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elif isinstance(value, list):
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for item in value:
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if isinstance(item, (dict, list)) and item:
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body = fmt(item)
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lines.append(f"{pad}- {body[0]}")
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lines += [f"{pad} {line}" for line in body[1:]]
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else:
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lines.append(f"{pad}- {scalar(item)}")
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else:
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lines.append(f"{pad}{scalar(value)}")
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return lines
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STORE_HASH = re.compile(r"/nix/store/[a-z0-9]{32}-")
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def strip_store(value):
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# closure hashes churn on any rebuild and are dix's job; drop them so exec
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# commands / paths read as "<name>/bin/x" and diff only on real changes
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if isinstance(value, dict):
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return {k: strip_store(v) for k, v in value.items()}
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if isinstance(value, list):
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return [strip_store(v) for v in value]
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if isinstance(value, str):
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return STORE_HASH.sub("", value)
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return value
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def inspect_hosts(ref):
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try:
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names = json.loads(nix("eval", "--json", f"{ref}#inspect", "--apply", "builtins.attrNames"))
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except subprocess.CalledProcessError as e:
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if "does not provide attribute" in e.stderr:
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return None
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raise RuntimeError(f"inspect eval failed for {ref}:\n{e.stderr}") from e
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return {
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host: nix("build", f"{ref}#inspect.{host}",
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"--no-link", "--print-out-paths").strip()
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for host in names
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}
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def read_inspect(path):
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with open(path) as f:
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return json.load(f)
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def inspect_data(ref):
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paths = inspect_hosts(ref)
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if paths is None:
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return None
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reports = {host: read_inspect(path) for host, path in paths.items()}
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for report in reports.values():
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for parent, key in INSPECT_PRUNE:
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report.get(parent, {}).pop(key, None)
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return {host: strip_store(report) for host, report in reports.items()}
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def tree_changes(old, new, path=()):
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if old == new:
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return
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if isinstance(old, dict) and isinstance(new, dict):
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for key in sorted(old.keys() | new.keys()):
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if key not in old:
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yield path + (key,), "add", new[key]
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elif key not in new:
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yield path + (key,), "del", old[key]
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else:
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yield from tree_changes(old[key], new[key], path + (key,))
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elif isinstance(old, list) and isinstance(new, list):
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# order-independent: a reordered list is not a change
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okeys, nkeys = list(map(compact, old)), list(map(compact, new))
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values = dict(zip(okeys, old)) | dict(zip(nkeys, new))
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for key in (Counter(okeys) - Counter(nkeys)).elements():
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yield path, "delitem", values[key]
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for key in (Counter(nkeys) - Counter(okeys)).elements():
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yield path, "additem", values[key]
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else:
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yield path, "change", (old, new)
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def render_change(path, kind, payload):
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label = ".".join(map(str, path[1:])) or path[0]
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if kind in ("add", "del", "additem", "delitem"):
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sign = "+" if kind in ("add", "additem") else "-"
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value = [payload] if kind in ("additem", "delitem") else payload
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if isinstance(value, (dict, list)) and value:
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return [f"{sign} {label}:"] + [f"{sign} {line}" for line in fmt(value, 1)]
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return [f"{sign} {label}: {scalar(value)}"]
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old, new = payload
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if isinstance(old, str) and isinstance(new, str) and "\n" in old + new:
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body = difflib.unified_diff(old.splitlines(), new.splitlines(), lineterm="")
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return [f" {label}:"] + [ln for ln in body if not ln.startswith(("---", "+++"))]
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if isinstance(old, (dict, list)) or isinstance(new, (dict, list)):
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return render_change(path, "del", old) + render_change(path, "add", new)
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return [f"- {label}: {scalar(old)}", f"+ {label}: {scalar(new)}"]
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def host_diff(old, new):
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lines = []
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attr = None
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for path, kind, payload in tree_changes(old, new):
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if path[0] != attr:
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attr = path[0]
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lines.append(f"@@ {attr} @@")
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lines += render_change(path, kind, payload)
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return "```diff\n" + "\n".join(lines) + "\n```" if lines else None
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def host_added(report):
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return "```diff\n" + "\n".join(f"+ {line}" for line in fmt(report)) + "\n```"
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def inspect_diff(args):
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old, new = inspect_data(args.old), inspect_data(args.new)
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if old is None or new is None:
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return
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def block(host):
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if host not in old:
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return f"## {host} (new)\n\n{host_added(new[host])}"
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if host not in new:
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return f"## {host}\n\n_host removed_"
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body = host_diff(old[host], new[host])
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return f"## {host}\n\n{body}" if body else None
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blocks = [b for b in map(block, sorted(set(old) | set(new))) if b]
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if blocks:
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print("\n\n".join(([args.title] if args.title else []) + blocks))
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def format_vulnix(vulns):
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rows = []
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for v in vulns:
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for cve in v["affected_by"]:
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score = v.get("cvssv3_basescore", {}).get(cve)
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desc = v.get("description", {}).get(cve, "")
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if len(desc) > 120:
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desc = desc[:117] + "..."
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rows.append((v["pname"], v["version"], cve, score, desc))
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rows.sort(key=lambda r: -(r[3] or 0))
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lines = [
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"| Package | Version | CVE | CVSS | Description |",
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"|---------|---------|-----|------|-------------|",
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]
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for pname, version, cve, score, desc in rows:
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score_str = f"{score:.1f}" if score else "?"
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cve_link = f"[{cve}](https://nvd.nist.gov/vuln/detail/{cve})"
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lines.append(f"| {pname} | {version} | {cve_link} | {score_str} | {desc} |")
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return "\n".join(lines)
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def vulnix(args):
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paths = list(build_hosts(args.ref).values())
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result = run("vulnix", "-j", *paths, capture_output=True)
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if result.returncode not in (0, 2):
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print(result.stderr, file=sys.stderr)
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sys.exit(result.returncode)
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vulns = json.loads(result.stdout or "[]")
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if vulns:
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cve_count = sum(len(v["affected_by"]) for v in vulns)
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date = datetime.date.today().isoformat()
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with open(args.body_out, "w") as f:
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f.write(f"vulnix scan ({date}): **{cve_count}** CVEs across **{len(vulns)}** packages.\n\n")
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f.write(format_vulnix(vulns))
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f.write("\n")
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print(len(vulns))
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def find_cycles(edges):
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adj = {}
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for e in edges:
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if e["kind"] == "after":
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adj.setdefault(e["from"], []).append(e["to"])
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visited, on_path = set(), set()
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path = []
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cycles = []
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def dfs(node):
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visited.add(node)
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path.append(node)
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on_path.add(node)
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for nb in adj.get(node, []):
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if nb in on_path:
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i = path.index(nb)
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cycles.append(path[i:] + [nb])
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elif nb not in visited:
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dfs(nb)
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path.pop()
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on_path.discard(node)
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for node in adj:
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if node not in visited:
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dfs(node)
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return cycles
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def lint(args):
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out = os.path.abspath(args.out)
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target = os.path.abspath(args.target)
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os.makedirs(out, exist_ok=True)
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os.chdir(target)
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files = [f for f in git("ls-files", "-z", "*.nix").stdout.split("\0") if f]
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if files:
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run("nixfmt", *files)
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with open(f"{out}/nixfmt.diff", "w") as f:
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f.write(git("diff").stdout)
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git("checkout", "--", ".")
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with open(f"{out}/statix.errfmt", "w") as f:
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f.write(run("statix", "check", ".", "-o", "errfmt", capture_output=True).stdout)
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dead = run("deadnix", "-o", "json", ".", capture_output=True).stdout
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with open(f"{out}/deadnix.rdjsonl", "w") as f:
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for line in filter(str.strip, dead.splitlines()):
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report = json.loads(line)
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for r in report["results"]:
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loc = {"path": report["file"]}
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if "line" in r:
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loc["range"] = {
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"start": {"line": r["line"], "column": r["column"]},
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"end": {"line": r["line"], "column": r["endColumn"]},
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}
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rec = {
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"message": r["message"],
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"location": loc,
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"severity": "ERROR",
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}
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json.dump(rec, f)
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f.write("\n")
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paths = inspect_hosts(target)
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with open(f"{out}/cycles.rdjsonl", "w") as f:
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for host, path in (paths or {}).items():
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report = read_inspect(path)
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for cycle in find_cycles(report["dependencies"]["edges"]):
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chain = " → ".join(u.split(":", 1)[1] for u in cycle)
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rec = {
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"message": f"[{host}] systemd ordering cycle: {chain}",
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"location": {"path": "flake.nix"},
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"severity": "ERROR",
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}
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json.dump(rec, f)
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f.write("\n")
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LINTERS = [
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("nixfmt.diff", ["-f=diff", "-f.diff.strip=1", "-name=nixfmt", "-level=error"]),
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("statix.errfmt", ["-efm=%f>%l:%c:%*[A-Z]:%*[0-9]:%m", "-name=statix", "-level=error"]),
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("deadnix.rdjsonl", ["-f=rdjsonl", "-name=deadnix"]),
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("cycles.rdjsonl", ["-f=rdjsonl", "-name=systemd-cycles", "-filter-mode=nofilter"]),
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]
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def lint_report(args):
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def reviewdog(path, flags):
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with open(path) as f:
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return run("reviewdog", *flags, f"-reporter={args.reporter}", "-fail-level=error", stdin=f).returncode
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codes = [reviewdog(f"{args.dir}/{name}", flags)
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for name, flags in LINTERS
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if os.path.getsize(f"{args.dir}/{name}") > 0]
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sys.exit(1 if any(codes) else 0)
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def post_comment(args):
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body = args.marker + "\n" + Path(args.body_file).read_text()
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pr = os.environ["PR"]
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comments = gitea("GET", f"/issues/{pr}/comments")
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existing = next((c for c in comments if c["body"].startswith(args.marker)), None)
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if existing:
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gitea("PATCH", f"/issues/comments/{existing['id']}", {"body": body})
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else:
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gitea("POST", f"/issues/{pr}/comments", {"body": body})
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def upsert_issue(args):
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body = Path(args.body_file).read_text()
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issue = find_open_issue(args.label)
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if issue:
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gitea("PATCH", f"/issues/{issue['number']}", {"body": body})
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else:
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gitea("POST", "/issues", {"title": args.title, "body": body, "labels": [label_id(args.label)]})
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def close_issue(args):
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issue = find_open_issue(args.label)
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if issue:
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gitea("PATCH", f"/issues/{issue['number']}", {"state": "closed"})
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def label_id(name):
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match = next((x for x in gitea("GET", "/labels") if x["name"] == name), None)
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return match["id"] if match else gitea("POST", "/labels", {"name": name, "color": "#ededed"})["id"]
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def open_pr(args):
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if git("diff", "--quiet", check=False).returncode == 0:
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print("no changes; nothing to do")
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return
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git("switch", "-C", args.branch)
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git("add", "-A")
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git("-c", "user.name=gitea-actions[bot]", "-c", "user.email=gitea-actions@noreply.local",
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"commit", "-m", args.title)
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host = os.environ["API"].removesuffix("/api/v1")
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auth = base64.b64encode(f'token:{os.environ["GH_TOKEN"]}'.encode()).decode()
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git("-c", f"http.extraHeader=Authorization: Basic {auth}",
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"push", "-f", f'{host}/{os.environ["REPO"]}.git', f"HEAD:{args.branch}")
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owner = os.environ["REPO"].split("/")[0]
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if gitea("GET", f"/pulls?state=open&head={owner}:{args.branch}"):
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return
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labels = [label_id(args.label)] if args.label else []
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gitea("POST", "/pulls",
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{"title": args.title, "head": args.branch, "base": args.base,
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"body": Path(args.body_file).read_text(), "labels": labels})
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def main():
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parser = argparse.ArgumentParser(prog="ci")
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sub = parser.add_subparsers(required=True)
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def command(name, fn, *positional):
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p = sub.add_parser(name)
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for arg in positional:
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if arg.endswith("?"):
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p.add_argument(arg[:-1], nargs="?")
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else:
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p.add_argument(arg)
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p.set_defaults(fn=fn)
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command("diff", diff, "old", "new", "title?")
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command("inspect-diff", inspect_diff, "old", "new", "title?")
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command("vulnix", vulnix, "ref", "body_out")
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command("lint", lint, "target", "out")
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command("lint-report", lint_report, "reporter", "dir")
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command("post-comment", post_comment, "marker", "body_file")
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command("upsert-issue", upsert_issue, "label", "title", "body_file")
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command("close-issue", close_issue, "label")
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command("open-pr", open_pr, "branch", "base", "title", "body_file", "label?")
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args = parser.parse_args()
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args.fn(args)
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if __name__ == "__main__":
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main()
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