23fc335e5d
The synchronous /api/compile endpoint forced one long-lived HTTP request
to span the entire build. Cloudflare's 100s edge timeout cuts that off
mid-flight for any cold ESP-IDF compile (BMP280 takes 5-7 min on first
run). The user-visible symptom was HTTP 524 well before the backend
even noticed.
Backend (compile.py)
- New `POST /api/compile/start` returns `{job_id}` immediately and
spawns the actual compile as an asyncio.create_task background.
- New `GET /api/compile/status/{job_id}` returns the current job state
(`pending` | `running` | `done` | `error`). Each poll completes in
milliseconds, far under any edge timeout.
- Existing `POST /api/compile/` kept verbatim for backward compatibility
(AVR/RP2040 builds finish in seconds and don't trip 524).
- Build logic extracted into `_run_compile()` so both paths share one
implementation; no duplicated ESP-IDF / arduino-cli branching.
- Async path opens its own short-lived DB session via AsyncSessionLocal
for metric recording — the request-scoped session is dead by the time
the background task finishes.
- COMPILE_JOBS dict purges entries 30 minutes after completion so a
busy server doesn't grow unboundedly.
Frontend (compilation.ts)
- compileCode() now: POST /compile/start → poll /compile/status every 2s
until state ∈ {done, error}, with a 15-minute client-side cap.
- 30s axios timeout per individual call (not per build) so transient
network blips during a long compile auto-retry instead of failing.
- 404 on /status throws (job expired / server restarted); other poll
errors warn and retry. Surfaces structured error responses verbatim
so the editor's compile-error panel keeps working unchanged.
Limitation: COMPILE_JOBS lives in-process; if velxio ever scales to
multiple FastAPI workers this needs to move to Redis or sqlite. Single-
instance is fine today.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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