normalise_files.sh

exclude_patterns() {
  exclude="-false" # need to start the list somewhere so we have the right number of "-or"

  for exclude_folder in .git .bundle tmp log; do
    exclude="$exclude -or -name $exclude_folder -prune"
  done

  for exclude_file in Gemfile.lock structure.sql '*.gif' '*.jpg' '*.png' '*jquery*' '*.doc' '*.pdf' '*.zip' '*.ico' '*.swf' '*.sqlite' '*.ttf'; do
    exclude="$exclude -or -iname $exclude_file"
  done

  echo $exclude
}

code_file_list() {
  find "${@:-.}" -not \( $(exclude_patterns) \) -type f -print0
}

normalise_files() {
  while IFS= read -d $'\0' -r file; do
    # `` strips all EOF newlines, printf straight echoes the file
    # line endings: tr
      # \r\n => \n for Win
      # \r => \n for Mac
    # whitespace & newline at EOF: sed
    # tabs -> 2 spaces: expand
    echo $file
    printf '%s' "`cat $file`" | tr '\r\n' '\n' | tr '\r' '\n' | sed -E 's/[[:blank:]]+$//' | expand -t 2 > "$file.tmp"
    mv "$file.tmp" "$file"
  done < <(code_file_list $@)
}