Cygwin: $PATH without spaces

gistfile1.sh

# First we need to split $PATH
# on ':' and put each line into
# an array

OLD_IFS=$IFS
IFS=$'\n' 
paths=(`echo $PATH | tr -s ":" "\n"`)
IFS=$OLD_IFS



# The paths supplied from Windows
# may not actually exist. These
# paths will cause cygpath to error
# so we will skip them and only 
# process actual directories.

valid_paths=();
for path in "${paths[@]}"; do
  if [ -d "${path}" ]; then

    # Save the cygdrive we are parsing
    cygdrive_save=$(echo $path | grep -oEi "/cygdrive/[a-z]+")

    if [[ $cygdrive_save ]]; then
 
      # Get the short version of the path from cygpath
      # We can't have ':' in our path so only grab the 
      # path following C: (or other drive letter)
      no_space_path=$(cygpath -a -m -s "${path}" | cut -d : -f 2); 


      # Use the saved cygdrive from above and 
      # prepend it to the short path
      valid_paths=("${valid_paths[@]}" "${cygdrive_save}${no_space_path}")

    else
      valid_paths=("${valid_paths[@]}" $path)
    fi  
  fi  
done



# Join the valid_paths array with ':' 
# and set $PATH

OLD_IFS=$IFS
IFS=":"
PATH="${valid_paths[*]}"
IFS=$OLD_IFS