github actions workflow (#15)

Author: rjpadilla

.github/workflows/nginx.yml

@@ -0,0 +1,123 @@
+name: build image
+
+on:
+  push:
+    branches:
+      - master
+      - main
+  workflow_dispatch:
+    inputs:
+      buildtype:
+        description: 'Build by "force" or on "change"'
+        required: true
+        default: 'force'
+  repository_dispatch:
+    types: nginx
+
+jobs:
+
+  compare:
+    runs-on: ubuntu-latest
+    outputs:
+      flag: ${{ steps.set-flag.outputs.flag }}
+    strategy:
+      fail-fast: false
+      matrix:
+        arch: [amd64, arm, arm64]
+    steps:
+      - name: checkout repository
+        uses: actions/checkout@v2
+      - name: container registries
+        run: |
+          docker login ghcr.io -u ${{ github.actor }} -p ${{ secrets.GITHUB_TOKEN }}
+          docker login docker.io -u ${{ secrets.DOCKERUSERNAME }} -p ${{ secrets.DOCKERAPIKEY }}
+      - name: compare image
+        id: set-flag
+        run: |
+          export DOCKER_CLI_EXPERIMENTAL=enabled
+          repo="treehouses/nginx-tags:${{ matrix.arch }}"
+          base="treehouses/alpine-tags:${{ matrix.arch }}"
+          docker pull -q $base &>/dev/null
+          docker pull -q $repo &>/dev/null
+          basesha=$(docker image inspect $base | jq --raw-output '.[0].RootFS.Layers|.[]')
+          reposha=$(docker image inspect $repo | jq --raw-output '.[0].RootFS.Layers|.[]')
+          echo "base sha:$basesha repo sha:$reposha"
+          ${{ github.event.inputs.buildtype  == 'force' }} && echo "::set-output name=flag::true" || echo "building on change" 
+          [[ $reposha == *$basesha* ]] && echo "no changes" || echo "::set-output name=flag::true"
+
+  images:
+    needs: compare
+    runs-on: ubuntu-latest
+    outputs:
+      build: ${{ steps.set-build.outputs.build }}
+    strategy:
+      fail-fast: false
+      matrix:
+        arch: [amd64, arm, arm64]
+    steps:
+      - name: checkout repository
+        uses: actions/checkout@v2
+      - name: container registries
+        run: |
+          docker login ghcr.io -u ${{ github.actor }} -p ${{ secrets.GITHUB_TOKEN }}
+          docker login docker.io -u ${{ secrets.DOCKERUSERNAME }} -p ${{ secrets.DOCKERAPIKEY }}
+      - name: docker image
+        if: ${{ needs.compare.outputs.flag }}
+        id: set-build
+        run: |
+          export DOCKER_CLI_EXPERIMENTAL=enabled
+          base="treehouses/alpine-tags:${{ matrix.arch }}"
+          repo="treehouses/nginx-tags"
+          dest="$repo:${{ matrix.arch }}"
+          date="$(date +%Y%m%d%H%M)"
+          docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
+          docker build -t ghcr.io/$dest --build-arg BASE=$base .
+          docker tag ghcr.io/$dest docker.io/$dest
+          docker tag ghcr.io/$dest ghcr.io/$dest-$date
+          docker tag docker.io/$dest docker.io/$dest-$date
+          docker push --all-tags ghcr.io/$repo
+          docker push --all-tags docker.io/$repo
+          docker images
+          echo "::set-output name=build::true"
+
+  manifests:
+    needs: images
+    strategy:
+      fail-fast: false
+      matrix:
+        registry: [docker.io, ghcr.io]
+    runs-on: ubuntu-latest
+    outputs:
+      send: ${{ steps.set-send.outputs.send }}
+    steps:
+      - name: container registries
+        run: |
+          docker login ghcr.io -u ${{ github.actor }} -p ${{ secrets.GITHUB_TOKEN }}
+          docker login docker.io -u ${{ secrets.DOCKERUSERNAME }} -p ${{ secrets.DOCKERAPIKEY }}
+      - name: create manifests
+        if: ${{ needs.images.outputs.build }}
+        id: set-send
+        run: |
+          repo="${{ matrix.registry }}/treehouses/nginx"
+          date="$(date +%Y%m%d%H%M)"
+          docker manifest create $repo:latest $repo-tags:amd64 $repo-tags:arm $repo-tags:arm64
+          docker manifest create $repo:$date $repo-tags:amd64 $repo-tags:arm $repo-tags:arm64
+          docker manifest annotate $repo:latest $repo-tags:arm --os linux --arch arm
+          docker manifest annotate $repo:$date $repo-tags:arm --os linux --arch arm
+          docker manifest inspect $repo:latest
+          docker manifest push $repo:latest
+          docker manifest push $repo:$date
+          echo "::set-output name=send::true"
+
+  message:
+    needs: manifests
+    runs-on: ubuntu-latest
+    steps:
+      - name: message chat of new image
+        if: ${{ needs.manifests.outputs.send }}
+        run: |
+          sudo npm install -g @treehouses/cli
+          export gitter_channel="${{ secrets.CHANNEL }}"
+          echo "https://hub.docker.com/r/treehouses/nginx/tags"
+          echo "https://github.com/treehouses/nginx/pkgs/container/nginx"
+          treehouses feedback "new treehouses/nginx check https://hub.docker.com/r/treehouses/nginx/tags or https://github.com/treehouses/nginx/pkgs/container/nginx"

.travis.yml

@@ -0,0 +1,15 @@
+ARG BASE=
+FROM ${BASE}
+
+RUN apk --no-cache update && apk  add nginx \
+    && mkdir -p /run/nginx \
+    && sed -i "s/ssl_session_cache shared:SSL:2m;/#ssl_session_cache shared:SSL:2m;/g" /etc/nginx/nginx.conf
+
+COPY default.conf /etc/nginx/conf.d
+
+RUN ln -sf /dev/stdout /var/log/nginx/access.log \
+    && ln -sf /dev/stderr /var/log/nginx/error.log
+
+EXPOSE 80 443
+
+CMD ["nginx", "-g", "daemon off;"]