go_target_wrapper.sh

#!/usr/bin/env sh

set -eu -o pipefail

: ${TARGETPLATFORM=}
: ${TARGETOS=}
: ${TARGETARCH=}
: ${TARGETVARIANT=}

if [ ! -z "$TARGETPLATFORM" ]; then
  os="$(echo $TARGETPLATFORM | cut -d"/" -f1)"
  arch="$(echo $TARGETPLATFORM | cut -d"/" -f2)"
  if [ ! -z "$os" ] && [ ! -z "$arch" ]; then
    export GOOS="$os"
    export GOARCH="$arch"
    if [ "$arch" == "arm" ]; then
      case "$(echo $TARGETPLATFORM | cut -d"/" -f3)" in
      "v5")
        export GOARM="5"
        ;;
      "v6")
        export GOARM="6"
        ;;
      *)
        export GOARM="7"
        ;;
      esac
    fi
  fi
fi

if [ ! -z "$TARGETOS" ]; then
  export GOOS="$TARGETOS"
fi

if [ ! -z "$TARGETARCH" ]; then
  export GOARCH="$TARGETARCH"
fi

if [ ! -z "$TARGETVARIANT" ]; then
  if [ "$GOARCH" == "arm" ]; then
    case "$TARGETVARIANT" in
    "v5")
      export GOARM="5"
      ;;
    "v6")
      export GOARM="6"
      ;;
    *)
      export GOARM="7"
      ;;
    esac
  fi
fi



exec /usr/local/go/bin/go "$@"