#!/usr/bin/env sh

set -eu

if [ "$(uname -s)" = Darwin ]; then
  os=osx
else
  os=linux
fi
arch=$(uname -m)

bindir=$( cd "${0%/*}" && pwd )
targetbin=$( cd "$bindir"/.. && pwd )/target/bin
protocversion=3.6.0
protocbin=$targetbin/protoc-$protocversion
protocurl=https://github.com/google/protobuf/releases/download/v$protocversion/protoc-$protocversion-$os-$arch.zip

if [ ! -f "$protocbin" ]; then
  tmp=$(mktemp -d -t protoc.XXX)
  mkdir -p "$targetbin"
  (
    cd "$tmp"
    curl -L --silent --fail -o "./protoc.zip" "$protocurl"
    unzip -q "./protoc.zip" bin/protoc
    chmod +x bin/protoc
  )
  mv "$tmp/bin/protoc" "$protocbin"
  rm -rf "$tmp"
fi

"$protocbin" "$@"