Add Travis build

.travis.yml

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+sudo: required
+
+services:
+ - docker
+
+env:
+  matrix:
+    - ARCH=arm
+    - ARCH=arm64
+    - ARCH=amd64
+
+script:
+  - ./travis-build.sh
+  - ./travis-test.sh
+  - >
+    if [ -n "$TRAVIS_TAG" ]; then
+      # push image
+      travis_retry timeout 5m docker login -u="$DOCKER_USER" -p="$DOCKER_PASS"
+      ./travis-deploy.sh
+    fi

Dockerfile.amd64

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+FROM golang
+
+COPY . /code
+WORKDIR /code
+
+RUN CGO_ENABLED=0 go build -a -installsuffix cgo http.go
+
+FROM scratch
+
+COPY --from=0 /code/http /http
+
+EXPOSE 8080
+
+CMD ["/http"]

Dockerfile.arm

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+FROM golang
+
+COPY . /code
+WORKDIR /code
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=arm go build -a -installsuffix cgo http.go
+
+FROM scratch
+
+COPY --from=0 /code/http /http
+
+EXPOSE 8080
+
+CMD ["/http"]

Dockerfile.arm64

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+FROM golang
+
+COPY . /code
+WORKDIR /code
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -a -installsuffix cgo http.go
+
+FROM scratch
+
+COPY --from=0 /code/http /http
+
+EXPOSE 8080
+
+CMD ["/http"]

travis-build.sh

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+#!/bin/bash
+set -e
+
+which docker
+
+systemctl stop docker
+
+echo "Updating Docker engine to master"
+curl -L -o /usr/local/bin/docker-containerd https://master.dockerproject.org/linux/amd64/docker-containerd
+curl -L -o /usr/local/bin/docker-containerd-ctr https://master.dockerproject.org/linux/amd64/docker-containerd-ctr
+curl -L -o /usr/local/bin/docker-containerd-shim https://master.dockerproject.org/linux/amd64/docker-containerd-shim
+curl -L -o /usr/local/bin/dockerd https://master.dockerproject.org/linux/amd64/dockerd
+curl -L -o /usr/local/bin/docker-init https://master.dockerproject.org/linux/amd64/docker-init
+curl -L -o /usr/local/bin/docker-proxy https://master.dockerproject.org/linux/amd64/docker-proxy
+curl -L -o /usr/local/bin/docker-runc https://master.dockerproject.org/linux/amd64/docker-runc
+curl -L -o /usr/local/bin/docker https://master.dockerproject.org/linux/amd64/docker
+
+systemctl start docker
+
+docker version
+
+
+if [ "$ARCH" != "amd64" ]; then
+  # prepare qemu
+  docker run --rm --privileged multiarch/qemu-user-static:register --reset
+
+  if [ "$ARCH" == "arm64" ]; then
+    # prepare qemu binary
+    docker create --name register hypriot/qemu-register
+    docker cp register:qemu-aarch64 qemu-aarch64-static
+  fi
+fi
+
+if [ -d tmp ]; then
+  docker rm build
+  rm -rf tmp
+fi
+
+docker build -t whoami -f "Dockerfile.$ARCH" .

travis-deploy.sh

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+#!/bin/bash
+set -e
+
+image="stefanscherer/whoami"
+docker tag whoami "$image:linux-$ARCH-$TRAVIS_TAG"
+docker push "$image:linux-$ARCH-$TRAVIS_TAG"
+
+if [ "$ARCH" == "amd64" ]; then
+  set +e
+  echo "Waiting for other images $image:linux-arm-$TRAVIS_TAG"
+  until docker run --rm stefanscherer/winspector "$image:linux-arm-$TRAVIS_TAG"
+  do
+    sleep 15
+    echo "Try again"
+  done
+  until docker run --rm stefanscherer/winspector "$image:linux-arm64-$TRAVIS_TAG"
+  do
+    sleep 15
+    echo "Try again"
+  done
+  until docker run --rm stefanscherer/winspector "$image:windows-amd64-$TRAVIS_TAG"
+  do
+    sleep 15
+    echo "Try again"
+  done
+  set -e
+
+  echo "Downloading manifest-tool"
+  wget https://github.com/estesp/manifest-tool/releases/download/v0.4.0/manifest-tool-linux-amd64
+  mv manifest-tool-linux-amd64 manifest-tool
+  chmod +x manifest-tool
+  ./manifest-tool
+
+  echo "Pushing manifest $image:$TRAVIS_TAG"
+  ./manifest-tool push from-args \
+    --platforms linux/amd64,linux/arm,linux/arm64,windows/amd64 \
+    --template "$image:OS-ARCH-$TRAVIS_TAG" \
+    --target "$image:$TRAVIS_TAG"
+
+  echo "Pushing manifest $image:latest"
+  ./manifest-tool push from-args \
+    --platforms linux/amd64,linux/arm,linux/arm64,windows/amd64 \
+    --template "$image:OS-ARCH-$TRAVIS_TAG" \
+    --target "$image:latest"
+fi

travis-test.sh

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+#!/bin/bash
+set -e
+
+if [ "$ARCH" == "amd64" ]; then
+  # test image
+  docker run -d -p 8080:8080 --name=whoamitest whoami
+
+  sleep 5
+
+  docker logs whoamitest
+fi