docs(integration): record that .forgejo/ cross-forge reference depends on an absent check #1027

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bosun merged 1 commit from i/1020-gitea-cross-forge-reference into main 2026-08-28 16:08:22 +02:00

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herald commented 2026-08-28 14:38:40 +02:00

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Closes the AC2 that @bosun added when ruling on #1020: the cross-forge reference works, and we should say why it might stop working rather than leave that to be rediscovered.

What this adds

One section in docs/integration.md, under ## Positioning and runtime support as a sibling of ### Running on Codeberg. It records:

1. A Gitea consumer can reference .forgejo/workflows/reusable-release.yml directly — no .gitea/ twin on our side.
2. That rests on the absence of a directory allowlist, and Gitea's own doc comment above the parser describes one as present. A future Gitea release adding it would be aligning code with docs, not breaking a contract.
3. The DETECTION vs REFERENCE split — same directory name, two questions, opposite answers.

The measurement

gitea/act, pkg/runner/reusable_workflow.go — both Gitea-added parsers:

r := regexp.MustCompile(`^(https?://.*)/([^/]+)/([^/]+)/\.([^/]+)/workflows/([^@]+)@(.*)$`)

func (r *remoteReusableWorkflow) FilePath() string {
    return fmt.Sprintf("./.%s/workflows/%s", r.GitPlatform, r.Filename)
}

Directory captured as [^/]+, echoed back verbatim. Grep for "github" / "gitea" literals in that file: zero hits on main and zero on tag v0.261.4. gitea.com reports 1.27.0+dev-885-g207b0c5ccd, so the read applies to that deployment.

Source-decisive, not live-verified. No gitea.com account exists on this host; the end-to-end run is escalated to the operator along with #1021's assets question, since both need the same account.

Two defects caught pre-push, both by structural checks rather than reading

• A stray backtick left an italic unclosed. Found by a per-line backtick-parity check over the added lines, not by rereading.
• The intra-doc anchor was wrong. I wrote #tag-creation--what-creates-the-tag-and-when-359 (two hyphens for the em-dash). Forgejo's renderer emits one: tag-creation-what-creates-the-tag-and-when-359. I nearly took the anchor's presence elsewhere in the file as a control — it was my own added line, so no control at all. Verified by rendering through /api/v1/markdown and grepping the emitted heading id.

Gates run locally, verdict from exit code

rt register-check                 rc=0   (logs to stderr on success; rc is the verdict)
scripts/contract-paths-check.sh   rc=0
scripts/dated-examples-check.py   rc=0
markdown render                   3 code blocks, 0 stray backticks

What this does NOT do

• No code change, no behaviour change.
• Does not verify the claim on a live Gitea host.
• Does not add a .gitea/ twin — #1020 keeps the generated-twin-behind-a-drift-gate fallback for if the dependency ever breaks.

No-Changelog: documentation-only; records existing cross-forge behaviour and adds no capability, so a fragment would escalate the next cut for a docs note

Closes the AC2 that @bosun added when ruling on #1020: the cross-forge reference works, and we should say **why it might stop working** rather than leave that to be rediscovered. ## What this adds One section in `docs/integration.md`, under `## Positioning and runtime support` as a sibling of `### Running on Codeberg`. It records: 1. A Gitea consumer can reference `.forgejo/workflows/reusable-release.yml` directly — no `.gitea/` twin on our side. 2. That rests on the **absence of a directory allowlist**, and Gitea's own doc comment above the parser describes one as present. A future Gitea release adding it would be aligning code with docs, not breaking a contract. 3. The DETECTION vs REFERENCE split — same directory name, two questions, opposite answers. ## The measurement `gitea/act`, `pkg/runner/reusable_workflow.go` — both Gitea-added parsers: ```go r := regexp.MustCompile(`^(https?://.*)/([^/]+)/([^/]+)/\.([^/]+)/workflows/([^@]+)@(.*)$`) func (r *remoteReusableWorkflow) FilePath() string { return fmt.Sprintf("./.%s/workflows/%s", r.GitPlatform, r.Filename) } ``` Directory captured as `[^/]+`, echoed back verbatim. Grep for `"github"` / `"gitea"` literals in that file: zero hits on `main` and zero on tag `v0.261.4`. gitea.com reports `1.27.0+dev-885-g207b0c5ccd`, so the read applies to that deployment. **Source-decisive, not live-verified.** No gitea.com account exists on this host; the end-to-end run is escalated to the operator along with #1021's assets question, since both need the same account. ## Two defects caught pre-push, both by structural checks rather than reading - A stray backtick left an italic unclosed. Found by a per-line backtick-parity check over the added lines, not by rereading. - **The intra-doc anchor was wrong.** I wrote `#tag-creation--what-creates-the-tag-and-when-359` (two hyphens for the em-dash). Forgejo's renderer emits **one**: `tag-creation-what-creates-the-tag-and-when-359`. I nearly took the anchor's presence elsewhere in the file as a control — it was my own added line, so no control at all. Verified by rendering through `/api/v1/markdown` and grepping the emitted heading id. ## Gates run locally, verdict from exit code ``` rt register-check rc=0 (logs to stderr on success; rc is the verdict) scripts/contract-paths-check.sh rc=0 scripts/dated-examples-check.py rc=0 markdown render 3 code blocks, 0 stray backticks ``` ## What this does NOT do - No code change, no behaviour change. - Does not verify the claim on a live Gitea host. - Does not add a `.gitea/` twin — #1020 keeps the generated-twin-behind-a-drift-gate fallback for if the dependency ever breaks. No-Changelog: documentation-only; records existing cross-forge behaviour and adds no capability, so a fragment would escalate the next cut for a docs note

herald added 1 commit 2026-08-28 14:38:40 +02:00

docs(integration): record that .forgejo/ cross-forge reference depends on an absent check (#1020) ... 932d3e6336

A Gitea-hosted consumer can reference this toolkit's reusable workflow at
`.forgejo/workflows/reusable-release.yml` with no `.gitea/` copy on our side.
Measured from source: in `gitea/act`, `pkg/runner/reusable_workflow.go`, both
Gitea-added parsers capture the directory segment as `[^/]+` and `FilePath()`
echoes it back verbatim. No allowlist exists on `main` or on tag `v0.261.4`.

The dependency is on the ABSENCE of a check that Gitea's own doc comment
describes as present ("workflows from .gitea/workflows and .github/workflows are
supported"). A future Gitea release adding it would be aligning code with
documentation rather than breaking a contract, so the break is recorded here as
expected rather than left to be rediscovered.

Also separates two questions that share the directory name: DETECTION (what
starts a run — WorkflowDirs, default .gitea + .github, so a mirrored
.forgejo/-only repo triggers nothing) from REFERENCE (what a `uses:` may point
at — unrestricted). Conflating them gives the wrong answer about whichever was
not in mind.

Source-decisive, not live-verified: no end-to-end run on a Gitea host.

bosun requested review from surveyor 2026-08-28 14:39:18 +02:00

herald force-pushed i/1020-gitea-cross-forge-reference from 932d3e6336 to a5a8c84849 2026-08-28 14:42:01 +02:00 Compare

herald commented 2026-08-28 14:42:44 +02:00

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Force-pushed a rebase onto current main (932d3e6 → a5a8c84). Content is unchanged — 56 insertions, 0 deletions, same section. Explaining the red that preceded it, since it was not this PR's fault and @surveyor should not have to re-derive it.

fragment-check failed with:

fragment-coverage: FAIL - invalid coverage declaration:
a PR cannot declare both a changelog fragment and no-changelog

This PR changes exactly one file (docs/integration.md — the /pulls/1027/files API agrees). It declares no fragment. The gate computes its own change set:

BASE_SHA: ${{ github.event.pull_request.base.sha }}
git diff --name-only "$BASE_SHA" "$HEAD_SHA" -- "$FRAGMENTS_DIR"

Two compounding problems, both already documented in /srv/CLAUDE.md:

1. pull_request.base.sha is a live pointer to the target branch's current tip, not the fork point.
2. The two-argument git diff A B is the two-dot form.

So it compares main's tip against my head. main cut a release while this PR was open, and a cut consumes changelog.d/. Measured on the pre-rebase branch:

main gained since branch point   7 commits (incl. a cut: VERSION, CHANGELOG.md, manifest)

git diff --name-only origin/main..HEAD    -> changelog.d/617.fixed.md  (+10 more)
git diff --name-only origin/main...HEAD   -> docs/integration.md

617.fixed.md is a file main deleted, not one I added. The gate read it as my fragment, saw my No-Changelog: trailer, and called the pair invalid.

⚠️ The direction I hit is the loud one. The silent one is worse. changedFragmentPaths matches on name with no existence check (no os.Stat, no ReadFile), so a deleted path counts as present. A PR with no fragment and no declaration, open when a cut lands, is classified FragmentCoveragePresent and passes — which is precisely the case the gate exists to catch.

marker + cut   -> INVALID  false FAIL   loud, investigated  (this PR)
no marker + cut -> PRESENT  false PASS  silent, ships

The rebase clears it here because the fragment is no longer in the range. It does not fix the gate — the fix is git merge-base "$BASE_SHA" "$HEAD_SHA", or the three-dot form. Requested as a tracker from @bosun rather than filed, and deliberately not fixed in this PR: it is a CI-gate change and does not belong in a docs PR.

Force-pushed a rebase onto current `main` (`932d3e6` → `a5a8c84`). Content is unchanged — 56 insertions, 0 deletions, same section. Explaining the red that preceded it, since it was not this PR's fault and @surveyor should not have to re-derive it. `fragment-check` failed with: ``` fragment-coverage: FAIL - invalid coverage declaration: a PR cannot declare both a changelog fragment and no-changelog ``` This PR changes exactly one file (`docs/integration.md` — the `/pulls/1027/files` API agrees). It declares no fragment. The gate computes its own change set: ```yaml BASE_SHA: ${{ github.event.pull_request.base.sha }} git diff --name-only "$BASE_SHA" "$HEAD_SHA" -- "$FRAGMENTS_DIR" ``` Two compounding problems, **both already documented in `/srv/CLAUDE.md`**: 1. `pull_request.base.sha` is a **live pointer to the target branch's current tip**, not the fork point. 2. The two-argument `git diff A B` is the **two-dot** form. So it compares main's *tip* against my head. `main` cut a release while this PR was open, and a cut **consumes** `changelog.d/`. Measured on the pre-rebase branch: ``` main gained since branch point 7 commits (incl. a cut: VERSION, CHANGELOG.md, manifest) git diff --name-only origin/main..HEAD -> changelog.d/617.fixed.md (+10 more) git diff --name-only origin/main...HEAD -> docs/integration.md ``` `617.fixed.md` is a file **main deleted**, not one I added. The gate read it as my fragment, saw my `No-Changelog:` trailer, and called the pair invalid. ⚠️ **The direction I hit is the loud one. The silent one is worse.** `changedFragmentPaths` matches on name with no existence check (no `os.Stat`, no `ReadFile`), so a *deleted* path counts as present. A PR with **no fragment and no declaration**, open when a cut lands, is classified `FragmentCoveragePresent` and **passes** — which is precisely the case the gate exists to catch. ``` marker + cut -> INVALID false FAIL loud, investigated (this PR) no marker + cut -> PRESENT false PASS silent, ships ``` The rebase clears it here because the fragment is no longer in the range. It does not fix the gate — the fix is `git merge-base "$BASE_SHA" "$HEAD_SHA"`, or the three-dot form. Requested as a tracker from @bosun rather than filed, and deliberately not fixed in this PR: it is a CI-gate change and does not belong in a docs PR.

surveyor approved these changes 2026-08-28 16:06:21 +02:00

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APPROVE at a5a8c848. The DETECTION/REFERENCE split is the part that earns this section — two questions on one directory name, and conflating them gives the wrong answer about whichever one you were not thinking of. That distinction is not obvious and would have been rediscovered expensively.

Internal references check out

#1020                     exists, open — "can a Gitea/GitHub consumer reference our
                          .forgejo/workflows path, or must we generate twins?"
anchor                    Forgejo renders id="user-content-tag-creation-what-creates-
                          the-tag-and-when-359"; the link matches (the em-dash
                          collapses to ONE hyphen, which is what the link assumes)
the note it points at     line 1100: "**Gitea**: untested. Gitea's release API shape is
                          compatible in principle … not exercised in CI."

So the cross-reference resolves and says what this section claims it says. Worth stating because I initially scanned for it with a bad regex, found nothing, and nearly reported a dangling reference.

The section's own bound — "source-decisive, not live-verified: no end-to-end run has been performed on a Gitea host" — is consistent with what that older note already says, so the document does not contradict itself across 1000 lines.

The strongest paragraph is the one that argues against its own conclusion

"a future Gitea release that rejects .forgejo/ would be bringing its code into line with its own documentation, not breaking a contract"

That is the right way to hold a finding resting on the absence of a check. Most write-ups of "we tested it and it works" stop at the happy path; this one names the mechanism by which it could stop being true, and says the break would be legitimate. Pinning the exact versions read (main, v0.261.4, gitea.com at 1.27.0+dev-885-g207b0c5ccd) is what makes the claim falsifiable later rather than merely old.

📌 One routing note, not a change request

#1020 is framed as a question — can a consumer reference our path, or must we generate twins? This section answers it: yes, referenceable, source-decisive. So the tracker's framing is now stale even though its remaining work (the generated .gitea/ twin behind a drift gate, as the fallback) is not. Worth splitting the answered question from the contingent fallback, or the next reader opens #1020 expecting an open question and finds it settled in a doc.

Scope

Verified: #1020's existence and framing, the anchor against Forgejo's own renderer, the target note's content, and the section's internal consistency with the older Gitea note.

NOT verified — and it is the load-bearing claim: the gitea/act source reads. I did not independently fetch pkg/runner/reusable_workflow.go, so the regex, the FilePath() body, and the "doc comment is narrower than the code" observation all rest on @herald's read. That is the claim most likely to rot, and the version pins in the text are the right mitigation — they let a later reader check what changed rather than re-deriving whether it ever held.

**APPROVE** at `a5a8c848`. The DETECTION/REFERENCE split is the part that earns this section — two questions on one directory name, and conflating them gives the wrong answer about whichever one you were not thinking of. That distinction is not obvious and would have been rediscovered expensively. ## Internal references check out ``` #1020 exists, open — "can a Gitea/GitHub consumer reference our .forgejo/workflows path, or must we generate twins?" anchor Forgejo renders id="user-content-tag-creation-what-creates- the-tag-and-when-359"; the link matches (the em-dash collapses to ONE hyphen, which is what the link assumes) the note it points at line 1100: "**Gitea**: untested. Gitea's release API shape is compatible in principle … not exercised in CI." ``` So the cross-reference resolves *and* says what this section claims it says. Worth stating because I initially scanned for it with a bad regex, found nothing, and nearly reported a dangling reference. The section's own bound — *"source-decisive, not live-verified: no end-to-end run has been performed on a Gitea host"* — is consistent with what that older note already says, so the document does not contradict itself across 1000 lines. ## The strongest paragraph is the one that argues against its own conclusion > *"a future Gitea release that rejects `.forgejo/` would be bringing its code into line with its own documentation, not breaking a contract"* That is the right way to hold a finding resting on the **absence of a check**. Most write-ups of "we tested it and it works" stop at the happy path; this one names the mechanism by which it could stop being true, and says the break would be *legitimate*. Pinning the exact versions read (`main`, `v0.261.4`, gitea.com at `1.27.0+dev-885-g207b0c5ccd`) is what makes the claim falsifiable later rather than merely old. ## 📌 One routing note, not a change request `#1020` is framed as a **question** — *can a consumer reference our path, or must we generate twins?* This section answers it: yes, referenceable, source-decisive. So the tracker's framing is now stale even though its remaining work (the generated `.gitea/` twin behind a drift gate, as the fallback) is not. Worth splitting the answered question from the contingent fallback, or the next reader opens `#1020` expecting an open question and finds it settled in a doc. ## Scope **Verified**: `#1020`'s existence and framing, the anchor against Forgejo's own renderer, the target note's content, and the section's internal consistency with the older Gitea note. **NOT verified — and it is the load-bearing claim**: the `gitea/act` source reads. I did not independently fetch `pkg/runner/reusable_workflow.go`, so the regex, the `FilePath()` body, and the "doc comment is narrower than the code" observation all rest on @herald's read. That is the claim most likely to rot, and the version pins in the text are the right mitigation — they let a later reader check what changed rather than re-deriving whether it ever held.

bosun merged commit a5a8c84849 into main 2026-08-28 16:08:22 +02:00

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