felhom-agent/scripts/check-published-versions.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""check-published-versions.py — a released agent version must be INSTALLABLE, not merely built.

R-115. A box installs the agent from a Gitea generic package the hub vouches, never from git, and
since R-110/R-183 it also fetches the agent's sixteen config files from `raw/tag/v<version>/`.
Nothing in the build, deploy or session-end path checked that either existed, so "deployed" and
"installable" were independent states that drifted silently. **Three instances in five days:**

  * R-111  (2026-07-29) 17 releases v0.97.0-v0.113.0 built and never published — a new customer
           would have installed without the whole R-82 tiered-backup arc, F-CRIT-2 and F-REBOOT.
  * 0.114.0 (same afternoon) built, deployed to felhom-pve, never published.
  * 0.120.0 (2026-08-03) built, committed, deployed to BOTH demo hosts, never published. A
           documented-path reinstall would have silently DOWNGRADED both boxes to the pre-merge
           agent — and would have *succeeded* while doing it.

THE INVARIANT, AND WHY IT IS THIS ONE.

  For every `v<semver>` git tag in this repo: the matching generic package must be DOWNLOADABLE,
  and the tag must serve the agent's configs.

The task's §8.4 asked for a different one — *"the version the hub tells machines to install must be
downloadable"* — and that is the better invariant in principle. **It is not implementable from CI,
and that was measured rather than assumed:** the hub's artifact manifest
(`GET /api/v1/artifacts/<customer>`) answers **401** without a per-customer retrieval passphrase,
and the Gitea package LISTING api answers **401** without a token, while the package DOWNLOAD url
and the git TAGS api are both anonymous. So a credential-free gate can ask *"is this version
installable"* but not *"which version is vouched"*. Putting an operator credential into CI to close
that gap is the operator's call, not a gate author's — it is recorded as a limitation below and as a
backlog row rather than quietly assumed away.

**What this invariant does catch: all three instances above.** `release-agent.sh` creates the tag and
publishes in one act, so a release whose publish was skipped, failed, or was forgotten leaves a tag
with no package — which is exactly what this refuses. It needs no version floor: tags begin at
v0.120.0, which is published.

**What it does NOT catch, stated plainly:** the hub vouching a version that was never released at
all (no tag, no package). Nothing here can see that; it belongs at vouch time, in the hub. → R-184.

FAIL-CLOSED. A network error, an unparseable response or an unreachable Gitea is exit **2
INCONCLUSIVE**, naming every URL tried — never a pass. "Cannot determine" is not "fine": that is the
standing rule this project earned twice, and a gate that green-lights on its own blindness is worse
than no gate, because it looks like coverage.

Pure python3 + urllib, NO curl and no third-party module: the CI runner is a host-mode container
carrying python3 and git and nothing else, and an earlier workflow step died on
`curl: command not found`.

    python3 scripts/check-published-versions.py

Exit: 0 every tag installable · 1 at least one is not · 2 could not be determined.
Env: GITEA_BASE overrides the Gitea root (CI sets the in-cluster service URL).
"""
import json
import os
import re
import sys
import urllib.error
import urllib.request

GITEA_BASE = os.environ.get("GITEA_BASE", "https://gitea.dooplex.hu").rstrip("/")
OWNER = "admin"
REPO = "felhom-agent"
PKG = "felhom-agent"
TIMEOUT = 25

# One config the installer fetches. Its presence proves the TAG's tree carries the configs the
# sixteen `fetch_raw` calls will ask for — a tag that exists but predates them would 404 a box
# mid-install, on a virgin machine, as root.
PROBE_CONFIG = "configs/felhom-agent.service"

TAG_RE = re.compile(r"^v(\d+\.\d+\.\d+)$")

tried = []


def _get(url, want_body=False):
    """GET a URL. Returns (status, body_or_None). Network failure raises."""
    tried.append(url)
    req = urllib.request.Request(url, method="GET")
    try:
        with urllib.request.urlopen(req, timeout=TIMEOUT) as r:
            body = r.read() if want_body else None
            return r.status, body
    except urllib.error.HTTPError as e:
        return e.code, None


def inconclusive(msg):
    print("INCONCLUSIVE:", msg)
    print("  URLs tried (a 'no access' claim must name its attempts):")
    for u in tried:
        print("   ", u)
    sys.exit(2)


def main():
    print("check-published-versions — every released agent version must be INSTALLABLE")
    print("  gitea:", GITEA_BASE)

    tags_url = "%s/api/v1/repos/%s/%s/tags?limit=200" % (GITEA_BASE, OWNER, REPO)
    try:
        status, body = _get(tags_url, want_body=True)
    except Exception as e:
        inconclusive("cannot reach Gitea to list tags: %s" % e)
    if status != 200 or not body:
        inconclusive("tags api returned HTTP %s — cannot enumerate releases" % status)
    try:
        tags = [t["name"] for t in json.loads(body.decode("utf-8"))]
    except Exception as e:
        inconclusive("tags api response is not the expected JSON: %s" % e)

    versions = sorted(m.group(1) for m in (TAG_RE.match(t) for t in tags) if m)
    if not versions:
        # Not a failure: a repo legitimately has no version tags before its first release. Say so
        # loudly rather than reporting a vacuous pass — an empty check that prints OK is how an
        # unexamined thing becomes a documented-clean one.
        print("  no v<semver> tags in this repo yet — nothing to check, and nothing proven")
        print("\ncheck-published-versions: NOTHING TO CHECK")
        return 0
    print("  %d released version(s) to verify: %s" % (len(versions), ", ".join(versions)))

    bad = []
    for v in versions:
        pkg_url = "%s/api/packages/%s/generic/%s/%s/%s" % (GITEA_BASE, OWNER, PKG, v, PKG)
        raw_url = "%s/%s/%s/raw/tag/v%s/%s" % (GITEA_BASE, OWNER, REPO, v, PROBE_CONFIG)
        try:
            pkg_status, _ = _get(pkg_url)
            raw_status, _ = _get(raw_url)
        except Exception as e:
            inconclusive("network failure while checking v%s: %s" % (v, e))

        problems = []
        if pkg_status != 200:
            problems.append("binary NOT downloadable (HTTP %s at %s)" % (pkg_status, pkg_url))
        if raw_status != 200:
            problems.append("tag does not serve %s (HTTP %s) — a box would 404 mid-install"
                            % (PROBE_CONFIG, raw_status))
        if problems:
            bad.append((v, problems))
            print("  FAIL v%s:" % v)
            for p in problems:
                print("        -", p)
        else:
            print("  ok   v%s: binary downloadable + tag serves its configs" % v)

    print()
    if bad:
        print("check-published-versions: %d RELEASED VERSION(S) NOT INSTALLABLE" % len(bad))
        print("  A tagged version with no package is a release that was BUILT and never PUBLISHED —")
        print("  the R-115 defect, three times in five days. Publish it with:")
        print("      scripts/release-agent.sh <version>")
        return 1
    print("check-published-versions: ALL RELEASED VERSIONS INSTALLABLE")
    return 0


if __name__ == "__main__":
    sys.exit(main())