A supporting script to migrate the bpmn.io code base to ES6 features

BIO_ES6_MIGRATE.sh

#!/usr/bin/env bash

shopt -s globstar

# loop all files to perform transformation
for i in lib/**/*.js
do
  echo "Processing $i"

  # we need to replace occurences of default function exports, as lebab does not support them:
  #
  # export default function SomeClass(...) { }
  #
  # =>
  #
  # export default SomeClass /*CLS*/; function SomeClass(...) { }
  #
  #
  # Afterwards we're going to transform stuff back again
  #
  cp "$i" "$i.bak"

  cat "$i" | \
    sed 's/export default function \([A-Z]\+[^ ]*\)(/export default \1 \/*CLS*\/; function \1(/' | \
    lebab -t class | \
    tr '\n' '\r' | \
    sed 's/export default \([A-Z]\+[^ ]*\) \/\*CLS\*\/;\r\rclass/export default class/' | \
    tr '\r' '\n' \
    > "$i"

  if [ "$(grep -q inherits "$i" ] or [ grep -q '/*CLS*/' "$i" ]; then
    echo "$i: needs additional migration (inherits)"
  fi

  if cmp -s "$i.bak" "$i"; then
    rm "$i.bak"
    continue;
  fi

  $EDITOR $i

  read -p "Keep $i it? Y/n: " keep

  if [[ $keep != "y" ]] && [[ -n $keep ]]; then
    echo "restored original $i"
    mv -f "$i.bak" "$i"
  else
    rm "$i.bak"
  fi
done


# perform linting fixes (correct whitespace and stuff)
npm run lint -- --fix