build caddy multiarch docker manifest

gistfile1.txt

#!/bin/sh

set -v -x

version=v1.0.1
imagebase=caddyserver/caddy:${version}
images=""

# docker manifest is old, consistent but still experimental (for no great reason)
# mkdir -p ~/.docker
# echo '{ "experimental" : "enabled" }' > ~/.docker/config.json

# echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
# note docker login writes to ~/.docker/config.json

build()
{
  local arch=$1
  local os=$2

  local img=${imagebase}_${arch}_${os}
  
  docker build --tag $img -f - . <<EOF
FROM scratch
COPY caddy-$os-$arch /caddy
EXPOSE 80/tcp 443/tcp 2015/tcp
CMD ["/caddy"]
EOF

  docker push $img
  images="${images} ${img}"
}


buildall()
{
  os=$1
  shift
  for arch in $@
  do
    if [ ! -f caddy-$os-$arch ]; then
      # arm7 hack
      if [ $arch = arm ]; then
        wget https://github.com/caddyserver/caddy/releases/download/${version}/caddy_${version}_${os}_${arch}7.tar.gz -O - \
          | tar -zxf - caddy
      else
        wget https://github.com/caddyserver/caddy/releases/download/${version}/caddy_${version}_${os}_${arch}.tar.gz -O - \
          | tar -zxf - caddy
      fi
      mv caddy caddy-$os-$arch
    fi
    build $arch $os
  done
}

# TODO ppc64le s390x (not on github)
buildall linux amd64 arm arm64 386

buildall freebsd amd64
buildall openbsd amd64

if [ ! -f caddy-darwin-amd64 ]
then
  wget https://github.com/caddyserver/caddy/releases/download/${version}/caddy_${version}_darwin_amd64.zip
  unzip caddy_${version}_darwin_amd64.zip caddy
  mv caddy caddy-darwin-amd64
fi
buildall darwin amd64

if [ ! -f caddy.exe ]
then
  wget https://github.com/caddyserver/caddy/releases/download/${version}/caddy_${version}_windows_amd64.zip
  unzip caddy_${version}_windows_amd64.zip caddy.exe
fi

## ref https://docs.microsoft.com/en-us/virtualization/windowscontainers/manage-docker/manage-windows-dockerfile
#img=${imagebase}_amd64_windows
#docker build --tag ${imagebase}_amd64_windows -f - . <<EOF
#FROM mcr.microsoft.com/windows/servercore:ltsc2019
#COPY caddy.exe /caddy
#EXPOSE 80/tcp 443/tcp
#CMD ["/caddy.exe"]
#EOF
#images="${images} ${img}"

annotateall()
{
  os=$1
  shift
  for arch in $@
  do
      docker manifest annotate --arch $arch --os $os ${target} ${imagebase}_${arch}_${os}
  done
}

for target in ${imagebase} ${imagebase%:*}:latest
do
  docker manifest create --amend ${imagebase} ${images}
  
  annotateall linux amd64 arm arm64 386
  annotateall darwin amd64
  #annotateall windows amd64
  annotateall freebsd amd64
  annotateall openbsd amd64
  
  docker manifest inspect ${imagebase}
  docker manifest push ${imagebase}
done