#!/bin/bash
set -euo pipefail

_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
_protoc_version="3.12.1"
_protoc_path="/tmp/pomerium-protoc/protoc-$_protoc_version"
_os="linux"
if [ "$(uname -s)" == "Darwin" ]; then
  _os="osx"
fi

if [ ! -f "$_protoc_path" ]; then
  echo "downloading protoc"
  mkdir -p "/tmp/pomerium-protoc"
  curl -L \
    -o protoc.zip \
    "https://github.com/protocolbuffers/protobuf/releases/download/v$_protoc_version/protoc-$_protoc_version-$_os-x86_64.zip"
  unzip -p protoc.zip bin/protoc >"$_protoc_path"
fi
chmod +x "$_protoc_path"

exec "$_protoc_path" --plugin="protoc-gen-go=$_dir/protoc-gen-go" "$@"