# Modular Post-Install (`setup.sh` + `lib/` + `services/`)

This is the new structure that gives you **one source of truth** *and* the
ability to **run just the service you want** — without maintaining a pile of
near-duplicate standalone scripts.

## Why

The full `ubuntu-post-install-*.sh` scripts are great as a "run once, set up the
whole box" experience, but to add or update one service you edit a 300 KB file
(in two or three places). The separate `setup-*.sh` scripts are easy to run for
one service, but duplicate logic and drift apart.

The fix is **not** to generate per-service scripts from the monolith (that just
triples the maintenance surface). It's to have **one implementation per service**
in a module, shared helpers in a library, and a thin dispatcher with two entry
points.

## Layout

```
setup.sh              # dispatcher: menu, run-one, --list, --dry-run, --unattended
lib/common.sh         # shared helpers: logging, prompts, ownership, Caddy wiring,
                      #   the service registry. THE single source of truth.
services/
  base.sh             # essential CLI packages (incl. glow)
  homeassistant.sh    # Home Assistant
  ...                 # one file per service
```

## Usage

```bash
sudo ./setup.sh                  # interactive menu (whiptail or text)
sudo ./setup.sh homeassistant    # install one service
sudo ./setup.sh base glow        # install several
./setup.sh --list                # list services, grouped
sudo ./setup.sh --dry-run --unattended minecraft   # preview, no prompts
```

## Anatomy of a service module

Each `services/<name>.sh` does exactly two things: **register** itself and
define **install_<name>**.

```bash
#!/bin/bash
register_service myapp homelab "What it does" 1234   # name group description [port]

install_myapp() {
    require_docker || return 1
    local DIR="$DOCKER_DIR/myapp"
    [ "$DRY_RUN" = true ] && { echo "[DRY-RUN] Would create $DIR"; return 0; }
    mkdir -p "$DIR"; ensure_docker_dir_ownership "$DIR"; cd "$DIR" || return 1
    cat > docker-compose.yml << 'YAML'
    ...
YAML
    configure_caddy_for_service "MyApp" "1234" "myapp"   # optional reverse proxy
    prompt_yn "Start now? (y/n):" "y" START && docker compose up -d
}
```

Helpers available from `lib/common.sh`: `log_info/success/warning/error`,
`prompt_yn`, `prompt_text`, `run_cmd`, `ensure_docker_dir_ownership`,
`generate_password`, `validate_password`, `configure_caddy_for_service`,
`require_root`, `require_docker`. Globals: `DOCKER_DIR`, `ACTUAL_USER`,
`ACTUAL_HOME`, `DRY_RUN`, `UNATTENDED`.

Every service installs to its **own folder** `~/docker/<name>/` with its **own
`docker-compose.yml`** (the DoTheEvo `selfhosted-apps-docker` layout) — never a
single shared compose file.

## Groups

`base` · `homelab` · `utilities` · `media` · `cameras` · `gaming` · `extras` ·
`backup`. `extras` holds non-Docker add-ons pulled from other repos (e.g. the
`silent-send` browser extension) — things that install/build on the host rather
than running as a container, so this script stays a single entry point for them.
The guided menu (`sudo ./setup.sh`) shows the **required** packages first with a
cancel option, then offers **Caddy** (most services proxy through it), then a
**category menu you loop through** — pick a category, tick services (already
installed ones are marked `[installed]`), install, and you land back on the menu
to pick the next category. Within `homelab`, Caddy → CrowdSec → Authelia are
ordered first.

## Migration status

Migration is complete. `setup.sh` + `services/` now cover every service
from `ubuntu-post-install-*-crowdsec.sh` plus several extras. The monolith
is retained as a frozen evolution record.

| Group | Modules |
|-------|---------|
| `base` | `base`, `glow` |
| `homelab` | `caddy`, `crowdsec`, `authelia`, `homeassistant` |
| `utilities` | `actualbudget`, `ddclient`, `filebrowser`, `fmd`, `magicmirror`, `mealie`, `meshcentral`, `ntfy`, `portainer`, `traccar`, `uptimekuma`, `watchtower`, `wg-easy` |
| `media` | `arm`, `audiobookshelf`, `emby`, `immich`, `jellyfin`, `lyrion` |
| `cameras` | `frigate`, `frigate-audio`, `frigate-notify`, `sky-cam` |
| `gaming` | `js99er`, `minecraft`, `wolf`, `wolf-pair` |
| `extras` | `linux-to-sync`, `silent-send`, `sync-cc` |
| `backup` | `backup` |