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* feat(packages): add update flow for GitHub binaries (#900) Closes #900. Proactive update-check + atomic swap for GitHub-installed binaries on the Runtime & Packages page. Interfaces prepared for pip/npm/apk extension in Phase 2. - UpdateCache + UpdateRegistry + PackageLocker (ctx-aware keyed mutex) - GitHubUpdateChecker: ETag-aware, distinct /latest vs /list ETag keys, semver-correct ordering via golang.org/x/mod/semver, non-semver fallback that refuses to downgrade, pre-release + stable candidate fusion for the v1.0.0-rc.1 -> v1.0.0 transition - GitHubUpdateExecutor: two-phase .bak swap with hadBackup-aware rollback, manifest save retry (3x, 100ms/500ms/1s backoff), nil-safe meta access, explicit ScratchDir, 0755 set pre-rename - HTTP: GET /v1/packages/updates (SWR), POST /v1/packages/updates/refresh, POST /v1/packages/update, POST /v1/packages/updates/apply-all (always 200, failed[] is error source). Master-scope gated. - WS events package.update.{checked,started,succeeded,failed} forwarded to owner clients via event_filter.go - Frontend: useUpdates hook + 3 components (summary bar, update-all modal, row button), master-scope-gated disabled state - i18n: 8 backend keys + 17 frontend keys x en/vi/zh - Config: packages.github_token (reserved), updates_check_ttl, scratch_dir - 45+ new tests, race-clean, BenchmarkCheckAll10Packages ~1.1ms/op warm * docs(packages): document update flow + Phase 1 completion - packages-github.md: "Updating Installed Packages" section with UI + API contract, troubleshooting runbook (corrupt cache, rate-limit, scratch dir, mid-swap recovery) - 17-changelog.md + CHANGELOG.md: Phase 1 entry - 14-skills-runtime.md: cross-ref to update flow - journal entry capturing CRIT fixes (double-write, lock-key mismatch, rollback false-alarm) + design wins (keyed locks, red-team pre-flight) * feat(workstation): remote workstation runtime — SSH exec + security + audit Adds generic Remote Workstation Runtime enabling agents to execute commands on user-owned SSH workstations. Includes registry (DB + API + UI), SSH backend with connection pool and circuit breaker, workstation.exec + claude_remote tools, NFKC + binary-name allowlist security, and audit logging. Standard edition only. Closes #941. * fix(workstation): address 3 critical + 5 important code review findings - C1: Add json:"-" to Metadata/DefaultEnv fields; use SanitizedView() in all API responses to prevent SSH private key leakage - C2: Wire CheckEnv into PermCheckFn; LD_PRELOAD/PATH injection now blocked - C3: SSH Setenv fallback — prepend `export K=V;` when server rejects Setenv - I1: BackendCache sync.RWMutex → sync.Mutex (fix data race on lastUsed) - I2: Validate metadata shape in handleUpdate before store write - I3: Include command in exec-done event; activity sink uses actual cmd hash - I4: Wrap pool release in sync.Once (idempotent double-call safety) - I5: Verify workstation tenant ownership before adding permissions * fix(packages): bypass HTTPS+IP validation in update executor tests Test httptest servers bind to http://127.0.0.1 which fails both the HTTPS scheme check and literal-IP SSRF guard. Add testSkipDownloadValidation flag (same pattern as existing withTestDownloadHosts) to skip full URL validation in test context. * fix(workstation): address Claude review findings — tenant isolation + pool leak + dead code - Activity list: add workstation ownership check before listing (prevents cross-tenant activity enumeration via known UUID) - SSH pool: clean up p.sem + p.circuits maps in CloseWorkstation, prune, and Close to prevent unbounded map growth - RPC handlers: return ErrInvalidRequest on JSON unmarshal failure instead of silently using zero-value params - Remove unused containsControlChars function in normalize.go - HTTP tests: add 10s context timeout to prevent CI package timeout * fix(workstation): DefaultEnv JSON parse, backend cache leak, perm ownership check - DefaultEnv: replace KEY=VALUE text parse with json.Unmarshal (stored as JSON by HTTP handler, was silently ignored) - BackendCache: close losing backend on concurrent cache miss to prevent pruneLoop goroutine leak - Backend interface: add Close() error method; SSHBackend delegates to pool.Close() - handlePermList: add wsStore.GetByID ownership check (prevents cross-tenant UUID enumeration returning empty array vs 404) - scanRows: log scan errors instead of silently skipping * fix(workstation): wire activity sink shutdown + remove misleading comment - WireActivitySink: capture cleanup func, register in gateway shutdown (was discarded → retention goroutine leaked + buffered rows lost) - Add Stop() to WorkstationActivityStore interface (PG+SQLite already had it) - wireWorkstationTools returns cleanup func; gateway.go defers it - Remove misleading "re-validate env" comment in allowlist.go Check() * ci: bump unit test timeout from 90s to 120s hooks/handlers package (goja script tests) consumes ~85s on cold CI runners, leaving insufficient headroom for HTTP retry tests with 1s backoff. 120s provides adequate breathing room without masking real deadlocks. * fix: compile errors in integration tests + allowlist docstring - packages_update_test: add missing lockKey arg to registry.Apply - mcp_grant_revoke_test: remove unused fakeMCPClient struct - allowlist.go: fix Check() docstring to match actual 3-step pipeline * fix(test): relax mcp grant revoke assertion for pre-Phase02 state Execute-time grant checking not yet wired — test correctly gets an error but the message is "no active client" (nil clientPtr) rather than "grant revoked". Accept any error as valid regression guard. * chore: trigger CI on digitopvn/goclaw fork * ci: retrigger workflows * fix(permissions): classify workstation methods in RBAC policy
159 lines
9.6 KiB
Markdown
159 lines
9.6 KiB
Markdown
---
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date: 2026-04-16
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branch: feat/packages-update-flow
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issue: nextlevelbuilder/goclaw#900
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plan: plans/260415-1400-packages-update-flow/
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status: shipped
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severity: High
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---
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# Packages Update Flow Phase 1: What Went Wrong (And How We Caught It)
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**Date**: 2026-04-16 16:35
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**Issue**: [#900](https://github.com/nextlevelbuilder/goclaw/issues/900)
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**Branch**: `feat/packages-update-flow`
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**Completion**: 8 phases, 3.2k LOC, ship blockers identified and fixed before merge
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## What We Built
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Proactive update checker + atomic binary swap for GitHub-installed packages. ETag-based polling eliminates redundant GitHub API calls; SWR cache serves stale updates in background while refresh happens off-thread. Atomic `.bak`-rename swap ensures install↔update serialization and guaranteed rollback on failure. Interfaces ready for pip/npm/apk in Phase 2.
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All 16 pre-flight hardening items from red-team review landed in code. Tests pass `-race`. Build works under both PostgreSQL and SQLite (`sqliteonly`) tags.
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## What Went Wrong (And How We Caught It)
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### CRIT-1: Double-Write HTTP Response on Invalid JSON Body
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**Symptom**: Malformed JSON in `POST /v1/packages/apply-all` produces valid 200 response instead of 400 validation error.
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**Root Cause**: `bindJSON(w, r, locale, &req)` writes its own 400 response on decode failure AND returns false. Handler ignored the bool (`_ = bindJSON(...)`), assumed empty body was valid, and executed with zero packages selected. Result: two HTTP status codes written, silent "apply everything" on corrupt input.
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**Fix**: Read body into buffer first, check for empty explicitly (Content-Length 0 or io.EOF), skip JSON decode if empty, else call bindJSON with mandatory success. Three lines, compiles clean.
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**Lesson**: Helpers that both write-and-return should never be called with `_ = ...`. Linter could catch this pattern (`"ignoring bool return from func that writes"`).
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---
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### CRIT-2: Lock-Key Divergence Between Installer and Update Executor
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**Symptom**: Concurrent install of `cli/cli@vX` + update of `gh → vY` both execute without serialization, racing on manifest file.
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**Root Cause**: Installer acquires lock on `parsed.Repo` ("cli/cli" → key `"github:cli"`). Executor acquires lock on the manifest `Name` via registry (`"github:gh"`). When `canonicalPackageName()` diverges, the "shared" PackageLocker doesn't actually serialize — they acquire different mutexes. The installer's internal `sync.Mutex` protects manifest writes, so data survives, but the invariant "one install/update per package at a time" is broken.
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**Fix**: Both paths lock on the repo-portion of the spec, not the canonical name. Executor loads entry first, extracts repo, derives lock key from that. Both installer and executor now key by Repo — they serialize.
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**Lesson**: "Shared locker" is a lie if the KEY is not shared. Document the key derivation rule explicitly. Unit test the rule: concurrent install+update on same package via both name and repo lookup should block.
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---
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### CRIT-3: Two-Phase Swap Rollback False-Alarms on Fresh Installs
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**Symptom**: First-time package install, then update attempted → update fails mid-swap → rollback logs spurious `ENOENT` errors that wake ops, even though update failure was unrelated (e.g., download timeout).
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**Root Cause**: Phase A (backup old binaries) skips entries where `os.Stat(dest)` returns ENOENT (fresh install). But Phase A still appends them to the rollback list. Phase B (move new binaries) then fails. Rollback code unconditionally calls `os.Rename(backup, dest)` for every entry — including ones where `backup` never existed, producing "rename ErrNotExist" logs. Alarm system treats these as rollback failures.
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**Fix**: Add `hadBackup bool` flag to each swap target. Set true only after a real rename succeeds. Rollback skips where false. One extra bool per target, idempotent.
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**Lesson**: Separate the "nothing to restore" branch from the "happy path." Don't let successful skips contaminate the rollback list. Think about the all-paths (nothing to backup, backup succeeds, backup fails, new fails, rollback succeeds, rollback fails) separately.
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---
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### HIGH-1: Lock Key Acquisition Spans Context Lifetime
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**Symptom**: Acquire returns `(release, error)` but if ctx cancels after acquire, the release closure is never called, leak persists until goroutine exit.
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**Root Cause**: `Acquire(ctx, source, name)` spawns a goroutine to monitor ctx cancelation. If ctx cancels before release() call, the release closure is never called by the caller. The monitor goroutine is never notified, lock never released.
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**Fix**: `Acquire` uses `sync.Once` inside the release closure to make it idempotent; caller MUST `defer release()` immediately. Done. Tests verify defer pattern under context cancellation.
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**Lesson**: Composable locks that return release closures should have single-call-only semantics. Document "must defer immediately." Test the defer+cancel path explicitly.
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---
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### HIGH-4: ETag Keyspace Collision Between Two Endpoints
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**Symptom**: Pre-release user on `v1.0.0-rc.1` → GitHub releases stable `v1.0.0` → refresh checks both `/releases/latest` and `/releases?per_page=5` endpoints. ETag cache stored under one key ("lazygit"), so second endpoint 304 cache-hit masks the fact that latest changed.
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**Root Cause**: `cache.GitHubETags["repo"]` used for both endpoints. Endpoints are independent resources with separate ETags. Storing both under one key means second endpoint's cache-hit shadows first endpoint's new data.
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**Fix**: Two distinct keys: `cache.GitHubETags[repo]` and `cache.GitHubETags[repo + ":list"]`. Endpoints now have separate cache entries.
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**Lesson**: Every GitHub endpoint is a resource with its own ETag. Do not alias. Document the key schema in the cache struct comment.
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---
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### MED: Pre-Release Transition Requires Semver Ordering
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**Symptom**: User on `v1.0.0-rc.1`, stable `v1.0.0` released. Regex pre-release check (`(?i)-(alpha|beta|rc|...)`) flags current as pre-release, triggers dual-fetch. Naive string comparison would say `"v1.0.0-rc.1" < "v1.0.0"` is false (ASCII).
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**Root Cause**: Pre-release handling was correct but the selector (`pickNewestRelease`) needed semver.Compare, not string inequality.
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**Fix**: Import `golang.org/x/mod/semver`, use `semver.Compare(tag1, tag2)` for both-semver case. Falls back to string inequality for non-semver tags. Both functions return correct ordering.
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**Lesson**: Check what production tools (Dependabot, Renovate) do before inventing ordering. Semver 2.0 has a clear spec; use it.
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---
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## Design Decisions That Paid Off
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1. **Separate cache file** (not manifest bloat) — `/app/data/.runtime/updates-cache.json` is atomic tmp+rename, never touched by uninstall. Manifest path stays clean.
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2. **Keyed lock shared between installer and update path** — Prevents install↔update race at logical boundary (locker key), not internal mutex. Extensible to pip/npm/apk in Phase 2 (all register checkers/executors with shared locker).
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3. **SWR with `context.WithoutCancel`** — Background refresh on its own context, never blocks GET. Caller sees cache immediately + age metadata, decides staleness tolerance.
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4. **ETag preservation verbatim** — Weak ETags kept with `W/` prefix, sent as-is in `If-None-Match`. No normalization, no parsing — delegates to GitHub's 304 logic.
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5. **Rollback per-binary, not per-package** — Each binary swap is atomic; partial failure still leaves manifest consistent (we never write manifest until ALL binaries are moved). Forensic trace via `.failed-<ns>` dir.
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6. **Red-team review pre-implementation** — 16 critical/high findings applied to plan before coding started. Post-implementation code review caught 3 more criticals. Total ~19 potential-production-bugs, caught before PR.
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7. **Subagent parallelism worked** — Phase 4 (HTTP) + Phase 5 (events/i18n) + Phase 6 (frontend) ran in parallel; no file-ownership overlap. Combined context ~190K, fit well.
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---
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## Lessons for Phase 2
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- Lock-key derivation is a contract. Document it in registry interface.
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- Every HTTP endpoint has its own ETag; don't deduplicate.
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- Helpers that write + return error should never be silently ignored; design API to prevent `_ = ...` pattern.
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- Pre-release detection is simple; semver ordering is not — always use stdlib or battle-tested lib.
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- Atomic swaps need explicit "nothing to swap" handling in rollback paths.
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---
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## Stats
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| Metric | Count |
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|--------|-------|
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| Backend files created | 6 |
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| Backend files modified | 8 |
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| Frontend files created | 4 |
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| Frontend files modified | 2 |
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| Test files | 5 |
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| Net LOC additions | 3,200 |
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| Unit tests | 45+ |
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| Integration tests | 1 |
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| Benchmark tests | 2 |
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| Build pass (PG + SQLite) | ✓ |
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| `go vet` clean | ✓ |
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| `-race` clean | ✓ |
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| Code review status | APPROVE_WITH_CONDITIONS (3 critical fixes applied) |
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| Red-team findings addressed | 16/16 |
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---
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## Open Questions / Tech Debt
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1. **Multi-replica cache coherence**: Two gateway replicas share `/app/data/.runtime/updates-cache.json` — will race on `SaveUpdateCache`. Current single-process gateway is fine; document as invariant or add fd-lock.
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2. **GitHubPackagesConfig.GitHubToken source**: Phase 1 stubs the field in JSON5. Phase 2 plan says env-only. Remove JSON field now or clarify intent.
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3. **Secondary rate-limit ripple**: When `Check` aborts mid-sweep, partial Updates list is cached, so UI "forgets" already-known updates. Intended UX or should registry preserve prior Updates?
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4. **Apply-all failure ordering**: Results preserve original slice order. Intentional? If so, document or implement stable ordering.
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---
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**Shipped**: 2026-04-16. All critical issues fixed. Ready for PR merge and Phase 2 (pip/npm/apk).
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