#!/bin/sh
# Create all the different builds for listen

# verify we are at root of repository
if ! [ -d .git ]; then
  echo build: this script must be run at the root of the repo
  exit 1
fi

if uname | grep -qe Linux; then
  os=linux
elif uname | grep -qe MINGW; then
  os=windows
else
  os=other
fi

build_go() {
  go build -o out/$(go env GOOS)/listen .
}

build_docker() {
  if [ $os = "windows" ]; then
    /c/Program\ Files/Docker/Docker/DockerCli.exe -SwitchWindowsEngine
    exe=C:/build/listen/listen.exe
  else
    exe=/usr/src/listen/listen
  fi
  
  if docker build -t listen-build -f docker/build.$os.Dockerfile .; then
    mkdir -p out/$os
    docker create --name listen-build-tmp listen-build
    docker cp listen-build-tmp:$exe out/$os
    docker rm listen-build-tmp
  fi
}

# if an arg is specified, force building with the specified method
[ $1 ] && (build_$1; exit)

# prefer building with local go install if it exists on path
if which go &> /dev/null; then
  build_go; exit
# if windows or linux, try building with docker
elif echo $os | grep -qe linux -e windows; then
  which docker &> /dev/null && (build_docker; exit)
fi

echo could not find valid build method for OS && exit 2