Automate publishing of Docker images

Author: dpb587

.github/workflows/publish.yml

@@ -1,10 +1,10 @@
-name: Versioning
+name: Publish
 on:
   push:
     tags:
       - 'v*'
 jobs:
-  publish:
+  release:
     name: Publish Release
     runs-on: ubuntu-18.04
     steps:
@@ -49,7 +49,7 @@ jobs:
         tag_name: ${{ github.ref }}
         release_name: v${{ steps.build.outputs.version }}
         body: ${{ steps.build.outputs.release_body }}
-        draft: true
+        draft: false
         prerelease: false
     - name: Upload Asset (darwin)
       uses: actions/[email protected]
@@ -78,3 +78,42 @@ jobs:
           asset_path: ./tmp/build/${{ steps.build.outputs.filename_windows }}
           asset_name: ${{ steps.build.outputs.filename_windows }}
           asset_content_type: application/octet-stream
+  docker:
+    name: Publish Docker
+    runs-on: ubuntu-18.04
+    needs:
+    - release
+    env:
+      IMAGE_NAME: gget
+    steps:
+    - name: Prepare
+      id: prepare
+      run: |
+        version="$( echo "${{ github.ref }}" | sed 's#refs/tags/v##' )"
+        echo ::set-output name=version::"$version"
+
+        image=docker.pkg.github.com/${{ github.repository }}/$IMAGE_NAME
+        echo ::set-output name=image::"$image"
+    - uses: actions/checkout@v1
+    - name: Build Image
+      run: |
+        docker build build/docker/$IMAGE_NAME \
+          --build-arg GITHUB_TOKEN=${{ secrets.GITHUB_TOKEN }} \
+          --build-arg GGET_REF=github.com/${{ github.repository }} \
+          --build-arg GGET_VERSION=v${{ steps.prepare.outputs.version }} \
+          --tag image
+    - name: Registry Login
+      run: |
+        echo "${{ secrets.GITHUB_TOKEN }}" | docker login docker.pkg.github.com -u ${{ github.actor }} --password-stdin
+    - name: Publish Images
+      run: |
+        for tag in \
+          ${{ steps.prepare.outputs.version }} \
+          $( echo "${{ steps.prepare.outputs.version }}" | cut -d. -f1-2 ) \
+          $( echo "${{ steps.prepare.outputs.version }}" | cut -d. -f1 ) \
+          latest \
+        ; do
+          fqimagetag="${{ steps.prepare.outputs.image }}:v$tag"
+          docker tag image $fqimagetag
+          docker push $fqimagetag
+        done

README.md

@@ -68,10 +68,10 @@ go get -u github.com/dpb587/gget
 
 ## Docker Usage
 
-The `dpb587/gget` image can be used as a build stage for finding and downloading assets for use in a subsequent stage.
+The `gget` image can be used as a build stage for finding and downloading assets for use in a subsequent stage.
 
 ```
-FROM dpb587/gget as gget
+FROM docker.pkg.github.com/dpb587/private/gget as gget
 RUN gget --executable github.com/cloudfoundry/bosh-cli bosh=bosh-cli-*-linux-amd64
 RUN gget --executable github.com/cloudfoundry/bosh-bootloader bbl=bbl-*_linux_x86-64
 RUN gget --stdout github.com/pivotal-cf/om om-linux-*.tar.gz | tar -xzf- om

build/docker/gget/Dockerfile

@@ -1,12 +1,15 @@
 FROM alpine as base
 RUN apk add --no-cache ca-certificates wget
 
+ARG GGET_VERSION
+ARG GGET_REF
+ARG GITHUB_TOKEN
 ENV gget /usr/local/bin/gget
 RUN true \
   && wget -qO "$gget" https://github.com/dpb587/gget/releases/download/v0.1.0/gget-0.1.0-linux-amd64 \
   && echo "418b68caeb302898322465abc31c316a1dbdb7872cdad0fe4a9661c5118860c4  $gget" | sha256sum -c \
   && chmod +x "$gget"
-RUN gget github.com/dpb587/gget --executable "$gget=gget-*-linux-amd64"
+RUN gget --exec ${GGET_REF:-github.com/dpb587/gget}@${GGET_VERSION:-} "$gget=gget-*-linux-amd64"
 RUN gget --version -v
 
 FROM alpine

docs/releases/v0.2.0.md

@@ -1,2 +1,3 @@
  * Renames `--exec` to `--executable`
  * Fixes panic when parsing some release notes for checksums.
+ * Automate publishing of Docker images on GitHub Packages.