Merge pull request #16 from depot/feat/lint

feat(lint): add lint flags

README.md

@@ -105,6 +105,8 @@ This action needs a Depot API token to communicate with your project's builders.
 | `token`           | String  | You must authenticate with the Depot API to communicate with your projects builders ([see Authentication above](#authentication))                                                                                                                                   |
 | `build-platform`  | String  | The platform to use for the build ( `linux/amd64` or `linux/arm64`)                                                                                                                                                                                                   |
 | `buildx-fallback` | Boolean | If true, this action will fallback to using `docker buildx build` if `depot build` is unable to acquire a builder connection. This requires installing buildx with [`docker/setup-buildx-action`](https://github.com/docker/setup-buildx-action) (default: `false`) |
+| `lint`            | Boolean | Lint dockerfiles and fail build if any issues are of `error` severity. (default `false`)                                                                         |
+| `lint-fail-on`    | String  | Severity of linter issue to cause the build to fail. (`error`, `warn`, `info`, `none`)                                                                         |
 
 ### General inputs
 
@@ -281,6 +283,7 @@ jobs:
 - [Build and push image to GCP Artifact Registry](/docs/build-and-push-artifact-registry.md)
 - [Build and push to multiple registries](/docs/build-and-push-multiple.md)
 - [Export image to Docker](/docs/export-to-docker.md)
+- [Lint and Build image](/docs/lint-and-build.md)
 
 ## License
 

action.yml

@@ -53,6 +53,12 @@ inputs:
   labels:
     description: 'List of metadata for an image'
     required: false
+  lint:
+    description: 'Lint dockerfiles and fail build if any issues are at least the lint-fail-on severity'
+    required: false
+  lint-fail-on:
+    description: 'Severity of linter issue to cause the build to fail. (e.g., error, warn, info, none)'
+    required: false
   load:
     description: 'Load is a shorthand for --output=type=docker'
     required: false

docs/lint-and-build.md

@@ -0,0 +1,31 @@
+```yaml
+name: Lint and Build image
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  docker-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v3
+
+      - name: Set up Depot CLI
+        uses: depot/setup-action@v1
+
+      - name: Lint and Build
+        uses: depot/build-push-action@v1
+        with:
+          # if no depot.json file is at the root of your repo, you must specify the project id
+          project: <your-depot-project-id>
+          lint: true
+          # Fail build on info, warning, and error linter issues
+          lint-fail-on: info
+          tags: user/app:latest
+```