mAi
b93c42a6e0
Migration 004:
- setup_templates + setup_template_devices + setup_template_requirements
- 3 built-in templates seeded: Living Room (TV+Soundbar+ChromeCast,
2× HDMI), Home Office (PC+Screen+Keyboard+Mouse, 1× HDMI + 2× USB),
Server Rack (NAS+Switch+fritz, 2× RJ45).
Cables store (cables.go):
- CRUD with endpoint validation (port|device|io exactly-one, project-
scoped). Tx-aware: validateEndpointEx + assertCableTypeEx avoid
deadlocks when the solver Apply tx holds the MaxOpenConns(1) connection.
Bundles store (bundles.go):
- CRUD with cable_ids replacement on PATCH. createBundle(ex, …, ownTx)
inherits the caller's tx for solver-internal use; returns a locally-
constructed Bundle when ownTx=false (re-fetching via s.db would
deadlock).
Solver (solver.go) implements design v4.1 §5b.2 exactly:
- Pre-fetch devices/ports/cables/requirements/bundles.
- Reserve ports used by manual cables (auto=0) so the solver can't
reuse them.
- For each requirement (must_connect DESC, id ASC):
* Resolve cable type: preferred, or T = port-types(from) ∩
port-types(to). |T|==0 → unsatisfied "no compat type"; |T|>1 →
"ambiguous"; |T|==1 → that one.
* Pick lowest-id free port on each side. None → unsatisfied with
WhichSide hint + cable-type name.
- Endpoint-pair bundle: ≥2 staged cables between the same device pair
→ auto bundle.
- Diff against existing auto cables by (type_id, MIN(from,to), MAX(from,to))
signature. Matched = kept; new = added; orphans = removed.
- Preview returns the diff without writing; Apply runs in a single tx
that wipes auto bundles, deletes orphan auto cables, inserts new
ones, and rebuilds bundles.
- PortsAndResolve: combo helper for the inspector quick-fix —
inserts a port + re-runs Solve.
Setup-templates store (setup_templates.go):
- List/Get with hydrated devices + requirements.
- ApplyTemplate(projectID, templateID, opts) seeds devices + requirements
in one tx. Per-device name overrides + opt-out. Name collisions skip
the device (skipped_devices); requirements whose endpoints both fail
are also skipped (requirements_skipped). UNIQUE-collision on an
existing requirement is non-fatal; logged in requirements_skipped.
Snapshot: cables + bundles fields tightened to []Cable / []Bundle and
populated from the store.
11 new tests (solver_test.go), all green with -race:
- Basic NAS↔Switch (RJ45) → 1 cable, auto=true
- Ambiguous cable type → unsatisfied
- No free port → unsatisfied with side hint
- Preview doesn't write
- Apply then re-apply → idempotent (kept=N, added=0)
- Manual cable reserves its port → solver can't claim it
- ApplyTemplate Living Room → 3 devices + 2 requirements + 7 ports
(from the device-type port seeder)
- Home Office template then Solve → 3 cables, 0 unsatisfied
- Name-collision pre-existing device → skipped + req-pair skipped
mCables
Cable-management framework for m's setup — visual web editor backed by a single Go binary + SQLite, generating Excalidraw drawings via mExDraw.
Each cable-managed environment (LOFT, OFFICE, …) is a separate mCables
project; each project is backed by exactly one .excalidraw drawing on
mxdrw.msbls.de.
Status
Slice 1 — bootstrap shipped. Projects + global cable types are end-to-end; the SVG canvas is intentionally empty until slice 2.
| Slice | What's in it | Status |
|---|---|---|
| 1 | Project CRUD, global cable types, empty SVG canvas, project picker | ✅ |
| 2 | Frames + devices, drag-to-position | pending |
| 3 | Ports + cables (click-port → click-port) | pending |
| 4 | IO markers + cable-type editing | pending |
| 5 | Export to mxdrw.msbls.de | pending |
Run it
go run ./cmd/mcables
# open http://localhost:7777
Or built:
make build
./bin/mcables
The binary serves the frontend from an embedded web/static/ and the
JSON API under /api/. SQLite lives at ./data/mcables.db by default.
Environment
| Var | Default | Notes |
|---|---|---|
MCABLES_ADDR |
0.0.0.0:7777 |
Listen address. |
MCABLES_DB |
./data/mcables.db |
SQLite path. Parent dir is created on boot. |
MEXDRAW_BASE_URL |
(unset) | Used by slice 5 export — not consumed yet. |
MEXDRAW_TOKEN |
(unset) | Bearer for the mExDraw export. Not consumed yet. |
Tests
make test # go test -race ./...
Store-level tests cover projects + cable-types CRUD, the
drawing_name auto-default, the ?confirm=<name> guardrail on
DELETE /api/projects/:pid, and the ON DELETE RESTRICT on a
referenced cable type.
API (slice 1)
GET /api/healthz → 200 {"status":"ok"}
GET /api/projects → [Project, …]
POST /api/projects ← {name, drawing_name?, description?}
drawing_name defaults to "<name>.excalidraw"
GET /api/projects/:pid → {project, cable_types, frames, devices, …}
PATCH /api/projects/:pid ← partial
DELETE /api/projects/:pid?confirm=<name> ← confirm must equal current name
GET /api/cable-types → [CableType, …] (global)
POST /api/cable-types ← {name, color}
PATCH /api/cable-types/:id ← partial — affects every project
DELETE /api/cable-types/:id ← 409 in_use if any cable references it
Deploy to mDock
mCables runs on mDock at http://mdock:7777 as a docker-compose
service under /home/m/stacks/mcables/. Pattern matches the other
mDock services (mgreen-journal, mgeo, msports-garmin, …) — no Dokploy,
no reverse proxy, LAN-trusted.
Manual deploy (first roll)
-
Build + push the image (from any host with docker; today the image lives in mAi's Gitea namespace because mAi doesn't have write access to
m/):docker build -t mgit.msbls.de/mai/mcables:latest . awk '/machine mgit.msbls.de/{getline; getline; print $2}' ~/.netrc-mai \ | docker login mgit.msbls.de -u mAi --password-stdin docker push mgit.msbls.de/mai/mcables:latest -
Prepare directories on mDock (one-time):
ssh mdock 'mkdir -p /home/m/stacks/mcables/data /home/m/secrets/mcables \ && touch /home/m/secrets/mcables/.env \ && chmod 0600 /home/m/secrets/mcables/.env' scp docker-compose.yml mdock:/home/m/stacks/mcables/docker-compose.yml -
Pull + start:
ssh mdock 'cd /home/m/stacks/mcables && docker compose pull && docker compose up -d' -
Verify from any LAN host:
curl http://mdock:7777/api/healthz # → {"status":"ok"} curl http://mdock:7777/api/cable-types # → the 5 seeded types
To update to a new build: rebuild + push the image, then
ssh mdock 'cd /home/m/stacks/mcables && docker compose pull && docker compose up -d'.
Persistence
SQLite lives at /home/m/stacks/mcables/data/mcables.db on the host
(bind-mounted into the container at /app/data). Container runs as
UID 1000:1000 to align with m:m ownership on mDock — DB files end
up owned by m, the host user.
docker compose restart keeps the data intact (tested 2026-05-15).
Automation — follow-up task
This first roll is manual. A Gitea Actions workflow on the
self-hosted runner already on mDock (/home/m/act-runner/, label
self-hosted:host) — build → push → docker compose up -d on every
push to main — is a separate task per the design's §10. Tracking
spawned by the head if/when wanted.
Design + project conventions
docs/design.md— full v3 design (schema, API, importer/export conventions, slices, mDock deploy notes).CLAUDE.md— project instructions for mai workers.
Architecture
| Layer | Tech |
|---|---|
| DB | SQLite via modernc.org/sqlite (cgo-free), WAL, FKs on |
| Backend | Go 1.22+ net/http ServeMux pattern routing, single binary |
| Frontend | Vanilla ES modules + SVG, no build step, embedded via embed.FS |
| Export (slice 5) | mExDraw HTTP API on mxdrw.msbls.de |
LAN-trusted, no auth.