call_rename_script

#!/bin/bash
#
# @author Zeus Intuivo <zeus@intuivo.com>
#

# check to see if I used a message, then it will behave as a put
#bash shell script check input argument

# set working directory as the scripts location during the execution of script
# cd "$(dirname "$0")"


# Bash: Detect pipe/file input in a shell script
# REF: https://gist.github.com/davejamesmiller/1966557

# How to detect whether input is from keyboard, a file, or another process.
# Useful for writing a script that can read from standard input, or prompt the
# user for input if there is none.

# Source: http://www.linuxquestions.org/questions/linux-software-2/bash-scripting-pipe-input-to-script-vs.-1-570945/
PIPED="";



# In Bash you can also use test -t to check for a terminal:

if [ -t 0 ]; then
    # Terminal input (keyboard) - interactive
    PIPED=""
else
    # File or pipe input - non-interactive
    PIPED="YES"

fi

# Piped Input
#if [ ! -z "$PIPED" ]
# then
# echo "this is pipe..die "
# exit 0;
#fi
# NOT Piped Input
#if [ -z "$PIPED" ]
# then
# echo "this NOT pipe..die "
# exit 0;
#fi
#echo "PIPED:$PIPED";
#exit;

# ALTERNATIVE:
#if readlink /proc/$$/fd/0 | grep -q "^pipe:"; then
    # Pipe input (echo abc | myscript)
#    PIPED="YES"
#elif file $( readlink /proc/$$/fd/0 ) | grep -q "character special"; then
    # Terminal input (keyboard)
#    PIPED=""
#else
    # File input (myscript < file.txt)
#    PIPED=""

#fi


# CURRENT SCRIPT EXECUTING
THISSCRIPTNAME=`basename "$0"`

# echo "Called $1, $2, $3"
# exit 0
#bash shell script check input argument
FAIL=0;
# echo "   ";
if [ -z "$1" ] && [ -z "$PIPED" ] ; then
  {
    echo "Missing 1st argument "
    FAIL=1;
  }
fi
if [ "$1" == "-h" ] && [ -z "$PIPED" ] ; then
  {
    echo "Help "
    echo "  "
    FAIL=1;
  }
fi
if [ -z "$2" ] ;  then
  {
    echo "Missing 2nd argument "
    FAIL=1;
  }
fi
if [ -z "$3" ] && [ "$1" != "-h" ] ;  then
  {
    echo "Missing 3rd argument "
    FAIL=1;
  }
fi
if [ $FAIL -eq 1 ] ; then
  {
    echo " ${THISSCRIPTNAME} - Used to call renamescript "
    echo " "
    echo " Examples: "
    echo " "
    echo "     EXTENSION: js es6 js/cards.js "
    echo " "
    echo "     # The find all the scripts with .js   "
    echo "     # Resulting in:  al scripts found renamed to .es6 filename and all references to it also"
    echo "  "
    echo " Sample Usage:    - expects three arguments "
    echo "  "
    echo "    ${THISSCRIPTNAME}    js      es6  js/cards.js "
    echo "    ";
    exit 1;
  }
fi


fromext="$1"
toext="$2"
from="$3"
# echo "Called $fromext, $toext, $from"
newname=$(echo "$from" | sed -e s@"$fromext"@"$toext"@g)
# echo "Called $from  to $newname"
renamescript  "$from" "$newname"