#!/bin/bash
# (c) Kim Holburn 2005 kim@holburn.net
# GPL v2 http://www.gnu.org/copyleft/gpl.html

# next line like basename but a bash builtin so faster
short=${0##*/}

if [ $# -lt 1 ]; then
  echo  "$short: No argument" 
  exit 1
fi
file="$1"
if [ ! -e "$file" ]; then
  echo "$short: \"$file\": No such file."
  exit 1
fi
if [ ! -r "$file" ]; then
  echo "$short: Cannot read file \"$file\".";
  exit 1;
fi
if ! plutil -lint -s "$file" ; then
  echo "$short: \"$file\": Invalid plist file.";
  exit 1;
fi
case "$short" in
pledit);;
plmore) plutil -convert xml1 -o /dev/stdout "$file" | more; exit;;
plless) plutil -convert xml1 -o /dev/stdout "$file" | less; exit;;
plcat|*) plutil -convert xml1 -o /dev/stdout "$file"; exit;;
esac
if [ ! -w "$file" ]; then
  echo "$short: Cannot write file \"$file\".";
  exit 1;
fi

# dated backups  
date=`date '+%Y-%m-%d'`
backup="$file.$date";
if [ -e $backup ]; then
  date=`date '+%Y-%m-%dT%H:%M:%S'`
  backup="$file.$date"
  if [ -e $backup ]; then
    $backup = `mktemp $backup.XXXX`
  fi
fi

file1=${file##*/}
temp=`mktemp /tmp/$file1.TEMP.XXXX`
temp2=`mktemp /tmp/$file1.TEMP2.XXXX`
new=`mktemp $file.NEW.XXXX`

if ! plutil -convert xml1 -o "$temp" "$file"; then 
  echo "$short: Couldn't convert file \"$file\"."
  exit
fi
if ! cp "$temp" "$temp2"; then
  echo "$short: Couldn't copy converted file \"$file\"."
  echo "    from \"$temp\" to \"$temp2\""
  rm "$temp"
  exit
fi
if ! vim "$temp"; then
  echo "$short: Couldn't edit converted file \"$temp\"."
  rm "$temp" "$temp2"
  exit
fi
if diff -b -q "$temp" "$temp2" > /dev/null; then
  echo "$short: No change in edited converted file \"$temp\"."
  rm "$temp" "$temp2"
else
  plutil -convert binary1 -o "$new" "$temp"
  rm "$temp" "$temp2"
  if [ -e "$temp~" ]; then
    rm "$temp~"
  fi
  mv "$file" "$backup"
  mv "$new" "$file"
fi