Esa Kataja
10ec9d1d6e
Initials() capped the loop with len(out) == 2, which counts bytes: a name starting with Ä, Ö or Å filled the budget on its own and returned a single letter. Count the initials taken instead. go fix also wanted a strings.Builder here, but that allocates a string per iteration to measure a two-character result. Took its SplitSeq suggestion in lyrics.go, which drops an intermediate slice.
Levyraati
A private music review club. Members submit songs — by file upload or YouTube link — and review each other's picks on a 1–100 scale. Other people's reviews of a song stay hidden until you've written your own.
Invite-only, no public registration. Built for about ten friends.
Status: not built yet. This README describes the app defined in docs/spec.md; commands here are the intended interface, not a record of anything that runs today.
Docs
| File | What's in it |
|---|---|
| CONTEXT.md | The glossary — every domain term, in English and Finnish |
| docs/spec.md | What the app does: rules, pipeline, routes, API contract, schema |
| docs/decisions.md | Why it is that way. Append-only |
| docs/theme.md | The visual language: tokens, type, and what differs from the theme handoff |
| docs/later.md | Deliberately not in v1, with the reasoning kept |
| docs/deployment.md | Running it on a server: the compose file, releases, upgrades, backups |
Branches and releases
main— released code only. Every commit on it is something that ran in production, or is meant to. Tagged at each release.dev— current development, and whatever nightly builds get made. Work happens here and reachesmainby merge at release time.
Versions are CalVer: YYYY.MM.DD-N, where N is the build number for that day, starting at 1.
The version is injected at build time, so no file in the repo carries it:
git switch main && git merge --no-ff dev
git tag 2026.07.31-1
VERSION=$(git describe --tags --exact-match) docker compose build app
docker compose up -d app
A plain go build reports dev, which is the honest answer for a local binary. The running
version appears in the footer, in the startup log line, and in GET /healthz — so "what is
actually deployed" is answerable without an SSH session.
The app never sends email — there is no verification, no password reset link, and no notifications. Members have an address because it is their login and because mail is a planned feature.
Stack
Go, SQLite, html/template, HTMX + Alpine. Audio is converted with ffmpeg and downloaded with
yt-dlp. One binary, one origin, one container — there is no separate frontend and no database server
to deploy.
Go dependencies: modernc.org/sqlite and golang.org/x/crypto. The SQLite driver is pure Go, so the
build stays CGO_ENABLED=0. No Node, no npm, no bundler.
Running it
cp .env.example .env # then edit — ADMIN_PASSWORD has no default and the app won't start without it
docker compose up -d
Migrations apply themselves at startup, before the server accepts connections. The first launch creates no users: log into the admin panel and mint an invite.
Configuration
| Variable | Default | Notes |
|---|---|---|
DB_PATH |
$STORAGE_DIR/levyraati.db |
The SQLite file. Created on first start |
ADMIN_USER |
admin |
Admin panel username |
ADMIN_PASSWORD |
— | Required. No default; the app refuses to start without it |
ADDR |
:8080 |
Member-facing listener |
ADMIN_ADDR |
127.0.0.1:8081 |
Admin listener. Keep it on loopback. Under Compose it binds :8081 inside the container and is published only to the host's loopback |
STORAGE_DIR |
./storage |
Audio, avatars, in-flight conversions |
SECURE_COOKIES |
true |
Set false for local development over plain HTTP |
PUBLIC_URL |
— | Public address of the member site, e.g. https://levyraati.example.com. Used to build invite links in the admin panel; unset gives relative links |
Local development
export ADMIN_PASSWORD=dev SECURE_COOKIES=false
go run .
Requires Go 1.25+, plus ffmpeg, ffprobe, and yt-dlp on PATH. There is nothing to start first:
the database is a file under ./storage, created on the first run.
Tests get a fresh database file in a temp directory each, so they need no setup and touch nothing:
go test ./...
Templates, stylesheet, and migrations are embedded with embed.FS, so a rebuild is needed to see
template changes. go build && ./levyraati is the loop.
Admin panel
The admin is not a user account. It exists only as ADMIN_USER / ADMIN_PASSWORD, authenticates
with HTTP Basic Auth, and is bound to loopback so it is not reachable from the internet. Reach it
through an SSH tunnel:
ssh -L 8081:127.0.0.1:8081 you@server
# then open http://localhost:8081
From there: mint invites, reset member passwords, ban members, delete songs, read issue reports.
Lost the admin password? Edit .env and docker compose restart app. There is no recovery
endpoint and no recovery key — the credentials are the environment.
Operations
yt-dlp goes stale
yt-dlp needs regular updates to keep working against YouTube. It comes from Alpine's community repository, whose active branch tracks upstream closely, so rebuilding is how you update it:
docker compose build --no-cache app && docker compose up -d app
Rebuild monthly. When submissions start failing with download errors, this is the first thing to try. Failures are shown to the submitter with the yt-dlp error attached, so they're visible without reading logs.
Logs
docker compose logs -f app
JSON to stdout, nothing else. There is no log table and no log viewer in the app.
Backups
./storage holds everything: audio files, avatars, and levyraati.db. It is a bind mount, so a copy
of that one directory is the whole backup. storage/tmp/ is in-flight conversions and is safe to
skip; it's cleared on startup anyway.
Copying the file while the app is running is not a backup — WAL means the latest writes live in a sidecar file. Ask SQLite for a consistent snapshot instead:
docker compose exec app sqlite3 /storage/levyraati.db ".backup '/storage/tmp/backup.db'"
gzip -c storage/tmp/backup.db > backup-$(date +%F).db.gz && rm storage/tmp/backup.db
Database shell
docker compose exec app sqlite3 /storage/levyraati.db
Layout
Go source is flat at the repository root, one package. Beyond that: templates/ and static/ are
embedded assets, migrations/ holds numbered .sql files applied in order at startup, and
testdata/ holds the golden JSON files that guard the API contract, plus ytdlp-noose.json — a real
yt-dlp -J dump of an ordinary upload, used to test metadata prefill against a video that has no
track, artist or album at all.
Notes
Downloading audio from YouTube is against YouTube's terms of service. This is a private app among a handful of friends; the decision is deliberate rather than accidental.
Licence
MIT — see LICENSE.