Prettier commit hook

pre-commit.sh

#!/bin/bash

# The latest version of this hook is available on GitHub;
#   https://github.com/sheredom/git-hooks
#
# This is free and unencumbered software released into the public domain.
#
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# distribute this software, either in source code form or as a compiled
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# means.
# 
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# of this software dedicate any and all copyright interest in the
# software to the public domain. We make this dedication for the benefit
# of the public at large and to the detriment of our heirs and
# successors. We intend this dedication to be an overt act of
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# software under copyright law.
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# find out where prettier is
# todo: need betterresolution to be able to use global prettier if no local found
exe=./node_modules/.bin/prettier

if [ -n "$exe" ]
then
  # set the field separator to new line
  IFS=$'\n'

  for line in $(git status -s)
  do
    # if the file is added or modified
    if [[ $line == A* || $line == M* ]]
    then
      # and the file is a *.js file
      if [[ $line == *.js ]]
      then
        # format the file
        $exe --write --print-width 120 --trailing-comma --single-quote --no-trailing-comma $(pwd)/${line:3}

        # and then add the file (so that any formatting changes get committed)
        git add $(pwd)/${line:3}
      fi
    fi
  done
else
  echo "WARNING: prettier was not found, cannot format files!"
fi