feat: Forgejo-native CI — a ci-box tenant and a forgejo-runner family
rig's CI story was GitHub-shaped end to end. This makes it work against a
self-hosted Forgejo, in three pieces.
The registry fetch becomes forge-aware. templates_resolve hardcoded three
github.com archive URLs; RIG_TEMPLATES_HOST now selects the grammar, because
the forges genuinely differ — GitHub serves refs/tags, refs/heads and bare
paths, Forgejo serves exactly one, and emitting the other two there would mean
two guaranteed 404s per fetch and a failure message listing URLs that never
could have worked. Measured against forgejo.heavyduty.builders, not inferred.
The default stays GitHub, so every existing caller is unchanged. install.sh's
snapshot reads the same variable through a byte-identical copy of the builder,
diffed by the tests: a snapshot cached from a forge converge would never fetch
from is worse than no snapshot, and the pin-in-the-name staleness guard cannot
catch a wrong-ORIGIN snapshot, only an old one.
ci-box is a tenant, not a machine role. The topology is a fleet machine
hosting boxes, one of which runs CI — a '-box' guest by rig's own family rule.
That also deletes the docker-in-docker layer the usual setup needs:
bootstrap-tenant.sh already installs Docker and adds the tenant user to the
group, and the isolation a privileged dind sidecar buys is already paid for by
a box that is network-isolated, inbound-less and disposable. rig runner
install refuses Docker for good reason — it converges a MACHINE, where the
blast radius is the machine. Here it is a guest that gets thrown away.
rig forgejo-runner is a new family beside rig runner, which is untouched.
Forgejo registers against an INSTANCE and the token carries the scope, so
there is no --repo to converge toward and nothing to compare; folding that
into one command would make every guard bimodal to share a flag name while the
contract underneath differs. assert_runner_instance asks the same
trust-boundary question about the axis Forgejo actually has. There is no
repoint and no --local, and both absences are explained where an operator
arriving from the GitHub sibling will hit them.
Forgejo's .runner holds the runner's own long-lived token, unlike GitHub's, so
it is installed 0600 and the mode is re-asserted on every converge — a mode
that drifted leaks the secret silently, since nothing fails and the runner
keeps working. status reports it and never prints the token.
Both downloads verify the published .sha256 before installing: this binary
lands as root and is executed by a systemd unit.
bootstrap --undo learns the guard for the same hazard on the other forge, and
it matters more here — Forgejo has no deregistration endpoint, so the ghost it
would strand has to be deleted by hand.
Known prerequisite, documented rather than assumed: the fetch is
unauthenticated by contract, and a Forgejo with REQUIRE_SIGNIN_VIEW=true
answers 404 for repos it reports as public. Hosting a registry there needs
FORGEJO__service__REQUIRE_SIGNIN_VIEW=false. The refusal names that case,
because it is indistinguishable from a wrong ref.
forgejo#109
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-07-27 20:40:54 +00:00
|
|
|
- **Creds-free by default.** The box starts with no Forgejo credentials and no
|
|
|
|
|
git credentials. The runner binary is installed but **not registered**:
|
fix: the ci-box token guidance says what a Forgejo token actually is
Round finding from @codex-reviewer-andresmgsl, elevated to blocking by
@grok-reviewer-andresmgsl and @kimi-reviewer-andresmgsl. Unanimous, and right.
creds.md called the registration token "short-lived" and said it was "consumed
at registration". Both are GitHub's facts, copied across the forge boundary
with the rest of the sibling's shape. Forgejo's primary source, read rather
than inferred:
models/actions/runner_token.go — ActionRunnerToken has NO expiry field. Only
IsActive, Created, Updated. NewRunnerToken flips IsActive false on prior
tokens at the same scope and only there, so a token dies when somebody mints
its replacement, never on a clock.
routers/api/actions/runner/runner.go — Register reads the token, refuses it
when !IsActive ("please use the latest one"), and returns WITHOUT setting
IsActive = false. Registration does not spend it. One token registers as many
runners as it is shown to.
So it is long-lived and reusable — the precise opposite of the adjective, and
GitHub's really does expire in about an hour, which is why runner-install.sh is
correct to use it.
This is not a wording nit because of where the wording lives. creds.md is
spliced into the ci-box's own CONTEXT.md: it is the paragraph an agent INSIDE
the box reads about its own credentials. Telling that reader the token
self-expires is telling it a leaked one stops mattering on its own, while it is
still registering runners.
Pinned, not merely fixed, per codex's ask — the phrase arrived by copying from
the GitHub sibling, so the same copy can bring it back. Four rows: absence from
both files, and presence of the true claim, so the pin cannot be satisfied by
deleting the sentence instead of correcting it. The first draft of the CIBOX
pin was a phrase match and passed against the exact text it was written to
catch — the old wording wrapped across two comment lines. It is a plain absence
check now, and the file explains the ban without spelling the word.
Mutation-checked: all four go red against the old wording, green after.
2026-07-28 16:18:33 +00:00
|
|
|
registration needs a token the operator mints in Forgejo (Site
|
|
|
|
|
Administration, org, or repo → Actions → Runners) and hands to
|
|
|
|
|
`sudo rig forgejo-runner install --instance <url>`. rig never writes that
|
|
|
|
|
token to disk — but it does **not expire, and registering does not spend
|
|
|
|
|
it**. A Forgejo registration token stays valid until somebody mints a
|
|
|
|
|
replacement at that same scope, and it will register as many runners as it is
|
|
|
|
|
shown to. Treat a leaked one as live until it has been replaced. (GitHub's
|
|
|
|
|
equivalent expires in about an hour; do not carry that habit across.) After
|
|
|
|
|
registration the runner's own credential lives in `~/forgejo-runner/.runner`,
|
|
|
|
|
mode 0600 — never copy it, print it, or commit it. Secrets that CI jobs need
|
|
|
|
|
belong in Forgejo's repo or org secrets, injected per job, not on this box.
|