glint
> **Disclaimer:** This tool was built through iterative AI-assisted development with [Claude](https://claude.ai). It is experimental, incomplete, and not intended for production use. Coverage of GitLab CI keywords is best-effort and may lag behind GitLab's evolving spec. Use it at your own discretion — no correctness guarantees are made. Contributions and bug reports are welcome.
A local tool to validate and lint `.gitlab-ci.yml` pipelines without needing a GitLab server.
## What it does
- **Lints** — 43 rules covering pipeline structure, keyword constraints, `needs:`/`dependencies:` graphs, expression reachability, and deprecations (GL001–GL043); run `glint explain ` for any rule
- **Resolves includes** — local files, HTTPS URLs, GitLab project templates, and CI/CD Catalog components, with offline cache support
- **Simulates context** — `--branch`, `--tag`, `--source` flags evaluate `rules:if:` and `only`/`except` to show which jobs would be active, manual, or skipped
- **Multiple output formats** — `--format text` (default, ruff-style), `json`, `sarif` (GitHub Code Scanning / GitLab SAST), `junit`, `github` (PR annotations)
- **Project config** — `.glint.yml` for rule suppression, severity overrides, token/URL defaults; `# glint: ignore RULE` for per-job inline suppression
- **Graph visualization** — `glint graph` prints a terminal job tree; `glint graph pipeline` renders a GitLab CI-style SVG/PNG
See [FEATURES.md](FEATURES.md) for the complete feature reference and lint rules table, and [ROADMAP.md](ROADMAP.md) for planned improvements.
## Requirements
- Go 1.21 or later
- [Task](https://taskfile.dev) (optional, for development tasks)
## Installation
```bash
git clone https://git.k3nny.fr/glint
cd glint
go build -o glint ./cmd/glint/...
```
Or with Task:
```bash
task build
```
## Usage
```
glint [OPTIONS]
Commands:
check Lint a pipeline file — exits 0 (clean) or 1 (errors found)
graph Visualise the pipeline as a job tree or Mermaid graph
explain Print description and fix for a lint rule
```
Run `glint --help` for all flags. See [USAGE.md](USAGE.md) for full
examples covering output formats, context simulation, remote includes, cache,
graph modes, and project configuration.
## Development
This project uses [Task](https://taskfile.dev) as a task runner.
```bash
task # list available tasks
task build # compile the binary
task test # run Go unit tests
task lint-go # run go vet
task validate # run the binary against all testdata fixtures
task ci # full check: vet → test → build → validate
task build-windows # cross-compile for Windows x64 (requires a tagged commit → glint-.exe)
task build-linux # cross-compile for Linux x64 (requires a tagged commit → glint--linux-amd64)
task clean # remove build artifacts
```
## Project structure
```
.
├── cmd/glint/ # CLI entrypoint
├── internal/
│ ├── cicontext/ # CI variable context, rules:if: evaluator, job reachability
│ ├── fetcher/ # GitLab API client (project include fetching)
│ ├── graph/ # Mermaid and SVG/PNG graph generators
│ ├── linter/ # lint rules and findings
│ ├── model/ # pipeline data structures and YAML parser
│ └── resolver/ # extends: resolution and project include merging
├── testdata/ # sample pipelines used for manual validation
├── Taskfile.yml
└── go.mod
```