collapse

#!/bin/bash
#
# > collapse <
#
# Opposite of prettyprint, but I didn't want to call it uglyprint.
# Code is not ugly.
#
# Flatten a JavaScript object into one line, multiple spaces into single spaces.
# james@da.ydrea.ms

function collapsefile {
  # distill the path down to a filename
  if [[ $1 =~ '/' ]]; then
    origin_filename=$(echo "$1" | sed 's/.*\/\(.*\)$/\1/g')
  else
    origin_filename=$1
  fi

  # split the filename components
  if [[ $origin_filename =~ '.' ]]; then
    rootname=$(echo "$origin_filename" | sed 's/\(.*\)\..*$/\1/g')
    extension=$(echo "$origin_filename" | sed 's/.*\(\..*\)$/\1/g')
  else
    rootname=$origin_filename
    extension=''
  fi

  if [[ -z "$2" ]]; then
    # destination=./ # if there's no default destination, otherwise ...
    destination=path/to/your/default/directory
  elif [ -d "$2" ]; then
    # append a trailing slash if there isn't one
    destination=$(echo "$2" | sed 's/\(.*[^\/]\)$/\1\//g')
  else
    echo "Uh-oh. $2 is not a directory."
    exit 1
  fi

  sed -E -e 's/^}$/ }/g' -e 's/[[:space:]]+/ /g' $1 | tr -d "\n" > "$destination$rootname"_collapsed"$extension"
}

# pass a file as the first argument ...
if [ -f "$1" ]; then
  collapsefile "$1" "$2"
  exit 0

# ... or, pass a directory as the first argument and batch collapse its files
elif [ -d "$1" ]; then
  # append a trailing slash if there isn't one
  directory=$(echo "$1" | sed 's/\(.*[^\/]\)$/\1\//g')
  for file in "$directory"*; do
    collapsefile "$file" "$2"
  done
  exit 0
else
  echo "Uh-oh. $1 is not a file."
  exit 1
fi