R Util Ci Gen

---
name: r-util-ci-gen
description: >
  Generate a GitHub Actions CI workflow from the project's test
---

Generate a GitHub Actions CI workflow from the project's test
infrastructure. Creates workflow files for user review — does NOT commit.

## Arguments
- `$ARGUMENTS` — optional: `--update` to update existing workflow

## Setup

Read `.rdf/governance/index.md` to identify:
- Project name and root directory
- Test infrastructure details (from governance/verification.md)
- Target OS matrix (from governance/reference/ if available)

## Procedure

### 1. Detect test infrastructure

Scan the project for:

**Test framework:**
- Check for test submodule (e.g., `tests/infra/`)
- Read version file if present
- Identify test runner (BATS, pytest, jest, etc.)

**Build/run targets:**
- Read `tests/Makefile` or equivalent
- Extract available targets and their OS mappings
- Identify Docker image names and Dockerfile paths

**Dockerfile variants:**
- Scan `tests/` for `Dockerfile*` files
- Map each to its OS target
- Extract base images and required packages

**Test files:**
- Count test files and estimate test count

### 2. Generate workflow

Create `.github/workflows/ci.yml` with:
- Lint job (syntax check + linter appropriate to language)
- Primary test job (default OS target)
- Secondary test jobs (additional OS targets from infrastructure)
- Conditional matrix job for full OS coverage (manual dispatch)

Use `actions/checkout@v4` with `submodules: recursive` if submodules
detected. Pin action versions to specific tags. Include proper
permissions block (principle of least privilege).

### 3. Handle --update flag

If `--update` is specified:
- Read existing `.github/workflows/ci.yml`
- Compare detected infrastructure against existing workflow
- Show diff of proposed changes
- Update with new targets while preserving custom additions

### 4. Report

Display the results using structured formatting:

```
### CI Setup — {project}

#### Detected Infrastructure

| Component | Value |
|-----------|-------|
| **Test framework** | `{name}` v`{version}` |
| **Build targets** | `{target1}`, `{target2}`, ... |
| **Dockerfiles** | {N} ({OS list}) |
| **Test files** | {N} |
| **Estimated tests** | {N} |

#### Generated

Workflow written to `.github/workflows/ci.yml`
```

Show workflow jobs as a table:

```
| Job | OS Target | Trigger |
|-----|-----------|---------|
| `lint` | — | push, PR |
| `test-debian12` | Debian 12 | push, PR |
| `test-rocky9` | Rocky 9 | push, PR |
| `test-matrix` | all targets | `workflow_dispatch` |
```

If `--update` was used, show the diff summary in a blockquote:

```
> **Update Summary**
> - Added: `{new targets}`
> - Removed: `{removed targets}`
> - Preserved: {N} custom additions
```

End with a task list for next steps:

```
#### Next Steps
- [ ] Review the generated workflow
- [ ] Test locally if possible
- [ ] Commit when satisfied
```

## Rules
- Does NOT commit — generates files for user review only
- Does NOT push — leave that to the user
- Create `.github/workflows/` directory if it doesn't exist
- If workflow already exists and `--update` not specified, warn and ask
  before overwriting
- Pin action versions to specific tags, not `@main` or `@latest`
- Include proper permissions block (principle of least privilege)