A Bash script to run an automated upgrade from Reason (bs-platform@<8) to ReScript (bs-platform@>=8).

migrate-to-rescript.sh

#!/usr/bin/env bash

function npm-do { (PATH=$(npm bin):$PATH; eval $@;) }

for file in src/*.re src/*.rei; do
  [ -f "$file" ] || break
  FILENAME=${file#src/}
  BASENAME=${FILENAME%%.*}
  
  cd src
  if [ ${file: -3} == ".re" ]; then
    npm-do bsc -format $FILENAME > "${BASENAME}.res"
  elif [ ${file: -4} == ".rei" ]; then
    npm-do bsc -format $FILENAME > "${BASENAME}.resi"
  fi

  rm $FILENAME
  cd ../
done