tailnote

#!/usr/bin/env bash
# On Macs, you need to install growlnotify: http://growl.info/documentation/growlnotify.php
# and put it in your PATH somewhere.

function usage() {
  echo "tailnote file [regex]"
  echo 
  echo "Tail a file and show notifications using Growl or Mumbles for lines matching regex."
  echo "If a regex is not provided, this will notify about all lines."
  echo 
  echo "example: tailnote log/development.log Error"
  echo
  exit
}

function notify() {
  if [ `/usr/bin/which -s growlnotify` ]; then
    # on linux
    "`/usr/bin/which mumbles-send`" "$1" "$2" &
  else
    # on a mac
    "`/usr/bin/which growlnotify`" -t "$1"  -m "$2" -w &
  fi
}

case $# in 
1) re=".*" ;;
2) re=$2 ;;
*) usage ;;
esac

`/usr/bin/which tail` -n0 -f $1 | while read line; do
  match=$(echo "$line" | /usr/bin/sed -n /"$re"/p)
  if [ -n "$match" ]; then
    notify "$1" "$match"
  fi
  echo $line
done