Add hadolint ignore for apk add

.gitea/workflows/docker-build.yaml

@@ -0,0 +1,65 @@
+name: Docker Build and Push
+
+on:
+  push:
+    branches: [master, main]
+  pull_request:
+  schedule:
+    - cron: '30 3 * * 3'
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
+      - uses: hadolint/hadolint-action@54c9adbab1582c2ef04b2016b760714a4bfde3cf
+        with:
+          dockerfile: Dockerfile
+          failure-threshold: error
+
+  build:
+    runs-on: ubuntu-latest
+    needs: lint
+    steps:
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
+      - name: Build image
+        run: docker build -t ci-image:${{ github.sha }} .
+      - name: Save image
+        run: docker save ci-image:${{ github.sha }} -o image.tar
+      - uses: ChristopherHX/gitea-upload-artifact@62ac910c5d3dfa85c7cb2df15afe2e342b2407c2
+        with:
+          name: docker-image
+          path: image.tar
+
+  test:
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
+      - uses: ChristopherHX/gitea-download-artifact@75635f32b4c1c41c4b3d64e8f85210112ed4c9c7
+        with:
+          name: docker-image
+      - name: Load image
+        run: docker load < image.tar
+      - name: Run tests
+        run: bash tests/test.sh ci-image:${{ github.sha }}
+
+  push:
+    runs-on: ubuntu-latest
+    needs: test
+    if: github.event_name != 'pull_request'
+    steps:
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
+      - uses: ChristopherHX/gitea-download-artifact@75635f32b4c1c41c4b3d64e8f85210112ed4c9c7
+        with:
+          name: docker-image
+      - name: Load image
+        run: docker load < image.tar
+      - uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Tag and push
+        run: |
+          docker tag ci-image:${{ github.sha }} jcabillot/unrar-arm64:latest
+          docker push jcabillot/unrar-arm64:latest

Dockerfile

@@ -1,6 +1,7 @@
 FROM "alpine:latest"
 LABEL maintainer="Julien Cabillot <dockerimages@cabillot.eu>"
 
+# hadolint ignore=DL3018
 RUN apk add --no-cache unrar && \
     rm -rf /usr/lib/ruby/gems/*/cache/* \
         /var/cache/apk/* \

tests/test.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+set -euo pipefail
+
+IMAGE="$1"
+FAILED=0
+PASSED=0
+
+TMPDIR="$(mktemp -d)"
+trap 'rm -rf "$TMPDIR"' EXIT
+
+docker run --rm --entrypoint /usr/bin/unrar "$IMAGE" > "$TMPDIR/output" 2>&1; RC=$?
+
+if grep -qiE "unrar|usage" "$TMPDIR/output"; then
+  echo "PASS: unrar prints usage info"
+  PASSED=$((PASSED + 1))
+else
+  echo "FAIL: unrar output unrecognized"
+  FAILED=$((FAILED + 1))
+fi
+
+# unrar displays help on stderr in some versions, check there too
+docker run --rm --entrypoint /usr/bin/unrar "$IMAGE" 2> "$TMPDIR/stderr" 1>/dev/null; :
+
+if grep -qiE "unrar|usage" "$TMPDIR/stderr"; then
+  echo "PASS: unrar stderr contains usage info"
+  PASSED=$((PASSED + 1))
+else
+  echo "FAIL: unrar stderr unrecognized"
+  FAILED=$((FAILED + 1))
+fi
+
+echo ""
+echo "$PASSED/$((PASSED + FAILED)) tests passed"
+if [ "$FAILED" -gt 0 ]; then
+  exit 1
+fi