i stole this protobuf-to-typescript converter from a really smart friend of mine

proto2ts.sh

#!/usr/bin/env bash

DIR=$(dirname "${BASH_SOURCE[0]}")
DIR=$(cd "$DIR" || exit; pwd -P)

if ! type protoc &> /dev/null; then
  echo "Dependency 'protoc' is not installed."
  echo
  echo "  If you are on macOS, you can use 'brew install protobuf'."
  echo
  echo "  Otherwise you can use a pre-built binary from 'https://github.com/protocolbuffers/protobuf/releases/'"
  exit 0
fi

function usage() {
  echo "Usage: proto2ts.sh [-I <INCLUDE_PATH>] PROTO_FILE"
}

while getopts "I:h?" option ; do
  case "$option" in
    I) INCLUDES+=("${OPTARG}") ;;
    h|\?) usage ; exit 0 ;;
  esac
done

shift $((OPTIND - 1))

if (($# == 0)); then
  usage
  exit 1
fi

INCLUDES=("${INCLUDES[@]/#/-I}")

read -r -p "Generate methods for binary payloads? [y/n]: " response;
case "$response" in
    [yY][eE][sS]|[yY]) ENCODE_METHODS=true ;;
    *) ENCODE_METHODS=false ;;
esac

read -r -p "Generate methods for JSON payloads? [y/n]: " response;
case "$response" in
    [yY][eE][sS]|[yY]) JSON_METHODS=true ;;
    *) JSON_METHODS=false ;;
esac

PLUGIN_PATH="$DIR/../node_modules/.bin/protoc-gen-ts_proto"
PROTO_FILE=$(basename "$1")
PROTO_PATH=$(dirname "$1")

cd "$PROTO_PATH" || exit 1

# Generate code based on the provided `.proto` file.
protoc \
  --plugin="$PLUGIN_PATH" \
  --ts_proto_opt=forceLong=string \
  --ts_proto_opt=useOptionals=true \
  --ts_proto_opt=outputEncodeMethods=$ENCODE_METHODS \
  --ts_proto_opt=outputJsonMethods=$JSON_METHODS \
  --ts_proto_opt=outputClientImpl=false \
  --ts_proto_out=. \
  "${INCLUDES[@]}" \
  "$PROTO_FILE"

# Echo a line-break for nicer output.
echo