51 lines
1.9 KiB
Markdown
51 lines
1.9 KiB
Markdown
# Rails dev-server recipe (auto-detect fallback)
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Loaded when `detect-project-type.sh` returns `rails` and there is no `.claude/launch.json` to consult.
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## Signature
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- `bin/dev` exists and is executable
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- `Gemfile` exists
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## Start command
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```bash
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bin/dev
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```
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`bin/dev` is the Rails 7+ convention for "start everything" (web + assets watcher + optional workers). It is a one-liner script that invokes `foreman start -f Procfile.dev` under the hood, so `Procfile.dev` is the canonical place to read the *actual* command if `bin/dev` is missing or non-executable.
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## Port
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Default: `3000`. Overrides follow the cascade in `references/dev-server-detection.md`:
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1. `Procfile.dev` `web:` line may contain `-p <n>`
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2. `config/puma.rb` may bind to a non-default port
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3. `.env` / `.env.development` `PORT=<n>`
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4. `AGENTS.md` / `CLAUDE.md` project instructions
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## Stub generation for `.claude/launch.json`
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When the user accepts "Save this as `.claude/launch.json`?", emit the Rails stub from `launch-json-schema.md`:
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```json
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{
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"version": "0.2.0",
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"configurations": [
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{
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"name": "Rails dev",
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"runtimeExecutable": "bin/dev",
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"runtimeArgs": [],
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"port": 3000
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}
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]
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}
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```
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If the cascade resolved a non-3000 port, substitute it in the stub's `port` field before writing.
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## Common gotchas
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- **Bundler path:** some machines require `bundle exec bin/dev`. If `bin/dev` fails with a load-path error, fall back to `bundle exec bin/dev`.
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- **Foreman vs overmind:** `Procfile` vs `Procfile.dev` often both exist. Rails' `bin/dev` resolves to `Procfile.dev`; if the project uses `overmind` explicitly, prefer `overmind start -f Procfile.dev` (see `dev-server-procfile.md`).
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- **SSL dev server:** `rails s` with `--ssl` changes the URL scheme. Polish's reachability probe uses `http://`; users with SSL dev servers should set `port` explicitly in `.claude/launch.json` and note the scheme in the checklist.
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