Testing hadolint

.github/workflows/hadolint.yml

@@ -0,0 +1,34 @@
+name: Hadolint
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: hadolint/hadolint-action@v3.1.0
+        with:
+          dockerfile: Dockerfile
+      - name: Update Pull Request
+        uses: actions/github-script@v6
+        # if: github.event_name == 'pull_request'
+        with:
+          script: |
+            const output = `
+            #### Hadolint: \`${{ steps.hadolint.outcome }}\`
+            \`\`\`
+            ${process.env.HADOLINT_RESULTS}
+            \`\`\`
+            `;
+
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: output
+            })

.hadolint.yml

@@ -0,0 +1,9 @@
+# Hadolint configuration file
+
+# configure ignore rules
+# see https://github.com/hadolint/hadolint#rules for a list of available rules.
+ignored:
+ - DL3018
+ - DL3042
+ - DL3013
+ - DL3059 # multi run

Dockerfile

@@ -5,10 +5,10 @@ LABEL "com.github.actions.description"="Run pylint and other commands"
 LABEL "com.github.actions.icon"="upload-cloud"
 LABEL "com.github.actions.color"="green"
 
-RUN apk add --no-cache bash build-base gcc
-RUN pip install --upgrade pip
-RUN pip install pylint pipenv
-RUN python --version ; pip --version ; pylint --version
+RUN apk add --no-cache bash build-base gcc && \
+pip install --upgrade pip && \
+pip install pylint pipenv && \
+python --version ; pip --version ; pylint --version
 
 COPY entrypoint.sh /
 RUN chmod +x /entrypoint.sh