Merge pull request #3 from crazy-max/ci

Update dockerfile and setup CI

Author: crazy-max

.github/workflows/build.yml

@@ -0,0 +1,72 @@
+name: build
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - 'master'
+      - 'v[0-9]*'
+    tags:
+      - 'v*'
+  pull_request:
+    branches:
+      - 'master'
+      - 'v[0-9]*'
+
+env:
+  # FIXME: Use docker/dockerfile when merged
+  REPO_SLUG: "crazymax/dockerfile"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        channel:
+          - mainline
+          - labs
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: |
+            ${{ env.REPO_SLUG }}
+          tags: |
+            type=semver,pattern={{version}},enable=${{ matrix.channel == 'mainline' }}
+            type=semver,pattern={{version}},suffix=-${{ matrix.channel }},enable=${{ matrix.channel != 'mainline' }}
+            type=ref,event=branch,enable=${{ matrix.channel == 'mainline' }}
+            type=ref,event=branch,suffix=-${{ matrix.channel }},enable=${{ matrix.channel != 'mainline' }}
+            type=raw,value=latest,enable=${{ startsWith(github.ref, 'refs/tags/') && matrix.channel == 'mainline' }}
+            type=raw,value=latest,suffix=-${{ matrix.channel }},enable=${{ startsWith(github.ref, 'refs/tags/') && matrix.channel != 'mainline' }}
+            type=ref,event=pr
+          bake-target: meta-helper
+          flavor: |
+            latest=false
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      -
+        name: Login to DockerHub
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      -
+        name: Build image
+        uses: docker/bake-action@v1
+        with:
+          files: |
+            ./docker-bake.hcl
+            ${{ steps.meta.outputs.bake-file }}
+          targets: image-cross
+          push: ${{ github.event_name != 'pull_request' }}

Dockerfile

@@ -0,0 +1,56 @@
+# syntax=docker/dockerfile:1-labs
+
+ARG GO_VERSION=1.17
+ARG XX_VERSION=1.1.0
+ARG CHANNEL
+
+# xx is a helper for cross-compilation
+FROM --platform=$BUILDPLATFORM tonistiigi/xx:${XX_VERSION} AS xx
+
+FROM --platform=$BUILDPLATFORM golang:${GO_VERSION}-alpine AS base
+COPY --from=xx / /
+RUN apk add --no-cache file git
+ENV CGO_ENABLED=0
+ENV GOFLAGS=-mod=vendor
+WORKDIR /src
+
+FROM base AS version
+ARG CHANNEL
+RUN --mount=target=. <<EOT
+channel=$CHANNEL
+suffix=""
+buildtags=""
+if [ -z "$channel" ]; then
+  channel="mainline"
+fi
+if [ "$channel" != "mainline" ]; then
+  suffix="-$channel"
+fi
+if [ -f "./release/$channel/tags" ]; then
+  buildtags="$(cat ./release/$channel/tags)"
+fi
+PKG=github.com/docker/dockerfile
+VERSION=$(git describe --match 'v[0-9]*' --dirty='.m' --always --tags)$suffix
+REVISION=$(git rev-parse HEAD)$(if ! git diff --no-ext-diff --quiet --exit-code; then echo .m; fi)
+echo "-X main.Version=${VERSION} -X main.Revision=${REVISION} -X main.Package=${PKG}" | tee /tmp/.ldflags
+echo -n "${VERSION}" | tee /tmp/.version
+echo -n "${buildtags}" | tee /tmp/.buildtags
+EOT
+
+FROM base AS build
+ARG LDFLAGS="-w -s"
+ARG TARGETPLATFORM
+RUN --mount=type=bind,target=. \
+  --mount=type=cache,target=/root/.cache \
+  --mount=type=cache,target=/go/pkg/mod \
+  --mount=type=bind,from=version,source=/tmp/.ldflags,target=/tmp/.ldflags \
+  --mount=type=bind,from=version,source=/tmp/.buildtags,target=/tmp/.buildtags <<EOT
+(set -x ; xx-go build -o /dockerfile-frontend -ldflags "-d $(cat /tmp/.ldflags) ${LDFLAGS}" -tags "$(cat /tmp/.buildtags) netgo static_build osusergo" ./cmd/dockerfile-frontend)
+xx-verify --static /dockerfile-frontend
+EOT
+
+FROM scratch
+LABEL moby.buildkit.frontend.network.none="true"
+LABEL moby.buildkit.frontend.caps="moby.buildkit.frontend.inputs,moby.buildkit.frontend.subrequests,moby.buildkit.frontend.contexts"
+COPY --from=build /dockerfile-frontend /bin/dockerfile-frontend
+ENTRYPOINT ["/bin/dockerfile-frontend"]