Improve docker build

.dockerignore

@@ -1 +1,3 @@
-bin
+.github/
+bin/
+tmp/

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ on:
 jobs:
   build:
     name: Build
-    runs-on: ubuntu-16.04
+    runs-on: ubuntu-latest
     env:
       GOFLAGS: -mod=readonly
 
@@ -81,63 +81,3 @@ jobs:
       # Ensure proto generation doesn't depend on external packages.
       - name: Verify proto
         run: make verify-proto
-
-  docker:
-    name: Docker
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v2
-
-      - name: Get Version
-        id: info
-        run: |
-          echo ::set-output name=created::$(date -u +'%Y-%m-%dT%H:%M:%SZ')
-
-      - name: Determine Docker Tag
-        uses: haya14busa/action-cond@v1
-        id: imagetag
-        with:
-          cond: ${{ github.event_name == 'pull_request' }}
-          if_true: ${{ github.sha }}
-          if_false: 'master'
-
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v1
-        with:
-          platforms: all
-
-      - name: Set up Docker Buildx
-        id: buildx
-        uses: docker/setup-buildx-action@v1
-        with:
-          install: true
-          version: latest
-          # TODO: Remove driver-opts once fix is released docker/buildx#386
-          driver-opts: image=moby/buildkit:master
-
-      - name: Login to DockerHub
-        uses: docker/login-action@v1
-        with:
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
-        if: github.event_name == 'push'
-
-      - name: Build and Push
-        uses: docker/build-push-action@v2
-        with:
-          context: .
-          file: Dockerfile
-          platforms: linux/amd64,linux/arm/v7,linux/arm64
-          push: ${{ github.event_name == 'push' }}
-          tags: dexidp/dex:${{ steps.imagetag.outputs.value }}
-          labels: |
-            org.opencontainers.image.title=${{ github.event.repository.name }}
-            org.opencontainers.image.description=${{ github.event.repository.description }}
-            org.opencontainers.image.url=${{ github.event.repository.html_url }}
-            org.opencontainers.image.source=${{ github.event.repository.clone_url }}
-            org.opencontainers.image.version=${{ steps.imagetag.outputs.value }}
-            org.opencontainers.image.created=${{ steps.info.outputs.created }}
-            org.opencontainers.image.revision=${{ github.sha }}
-            org.opencontainers.image.licenses=${{ github.event.repository.license.spdx_id }}

.github/workflows/docker.yml

@@ -0,0 +1,94 @@
+name: Docker
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - v[0-9]+.[0-9]+.[0-9]+
+  pull_request:
+
+jobs:
+  docker:
+    name: Docker
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Calculate Docker image tags
+        id: tags
+        env:
+          DOCKER_IMAGES: "ghcr.io/dexidp/dex dexidp/dex"
+        run: |
+          case $GITHUB_REF in
+            refs/tags/*)  VERSION=${GITHUB_REF#refs/tags/};;
+            refs/heads/*) VERSION=$(echo ${GITHUB_REF#refs/heads/} | sed -r 's#/+#-#g');;
+            refs/pull/*)  VERSION=pr-${{ github.event.number }};;
+            *)            VERSION=sha-${GITHUB_SHA::8};;
+          esac
+
+          TAGS=()
+          for image in $DOCKER_IMAGES; do
+            TAGS+=("${image}:${VERSION}")
+
+            if [[ "${{ github.event.repository.default_branch }}" == "$VERSION" ]]; then
+              TAGS+=("${image}:latest")
+            fi
+          done
+
+          echo ::set-output name=version::${VERSION}
+          echo ::set-output name=tags::$(IFS=,; echo "${TAGS[*]}")
+          echo ::set-output name=commit_hash::${GITHUB_SHA::8}
+          echo ::set-output name=build_date::$(git show -s --format=%cI)
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+        with:
+          platforms: all
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+        with:
+          install: true
+          version: latest
+          # TODO: Remove driver-opts once fix is released docker/buildx#386
+          driver-opts: image=moby/buildkit:master
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.CR_PAT }}
+        if: github.event_name == 'push'
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+        if: github.event_name == 'push'
+
+      - name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm/v7,linux/arm64
+          push: ${{ github.event_name == 'push' }}
+          tags: ${{ steps.tags.outputs.tags }}
+          build-args: |
+            VERSION=${{ steps.tags.outputs.version }}
+            COMMIT_HASH=${{ steps.tags.outputs.commit_hash }}
+            BUILD_DATE=${{ steps.tags.outputs.build_date }}
+          labels: |
+            org.opencontainers.image.title=${{ github.event.repository.name }}
+            org.opencontainers.image.description=${{ github.event.repository.description }}
+            org.opencontainers.image.url=${{ github.event.repository.html_url }}
+            org.opencontainers.image.source=${{ github.event.repository.clone_url }}
+            org.opencontainers.image.version=${{ steps.tags.outputs.version }}
+            org.opencontainers.image.created=${{ steps.tags.outputs.build_date }}
+            org.opencontainers.image.revision=${{ github.sha }}
+            org.opencontainers.image.licenses=${{ github.event.repository.license.spdx_id }}
+            org.opencontainers.image.documentation=https://dexidp.io/docs/

Dockerfile

@@ -12,6 +12,12 @@ ENV GOOS=${TARGETOS} \
 
 RUN apk add --no-cache --update alpine-sdk
 
+ARG GOPROXY
+
+COPY go.mod go.sum ./
+COPY api/v2/go.mod api/v2/go.sum ./api/v2/
+RUN go mod download
+
 COPY . .
 
 RUN make release-binary