meldq

#!/bin/bash

# This is a quiet meld launcher.
COMMAND="meld"
# COMMAND="diffuse"

if [ ! -f "`command -v nohup`" ]; then
    echo "$0 requires nohup"
    exit 1
fi
if [ ! -f "`command -v $COMMAND`" ]; then
    echo "$0 requires $COMMAND"
    exit 1
fi

if [ -z "$1" ]; then
    echo "You must specify 2 or 3 files or directories."
    exit 1
elif [ ! -f "$1" ]; then
    if [ ! -d "$1" ]; then
        echo "'$1' is neither a file nor a directory"
        exit 1
    fi
fi

if [ -z "$2" ]; then
    echo "You must specify 2 or 3 files or directories."
    exit 1
elif [ ! -f "$2" ]; then
    if [ ! -d "$2" ]; then
        echo "'$2' is neither a file nor a directory"
        exit 1
    fi
fi

if [ -f "$1" ]; then
    if [ ! -f "$2" ]; then
        echo "Cannot compare a file ('$1') to something that is not a file ('$2')"
        exit 1
    fi
elif [ -d "$1" ]; then
    if [ ! -d "$2" ]; then
        echo "Cannot compare a directory ('$1') to something that is not a directory ('$2')"
        exit 1
    fi
fi

if [ ! -z "$3" ]; then
    if [ -f "$1" ]; then
        if [ ! -f "$3" ]; then
            echo "Cannot compare a file ('$1') to something that is not a file ('$3')"
            exit 1
        fi
    elif [ -d "$1" ]; then
        if [ ! -d "$3" ]; then
            echo "Cannot compare a directory ('$1') to something that is not a directory ('$3')"
            exit 1
        fi
    fi
    nohup $COMMAND "$1" "$2" "$3" >& /dev/null & disown
else
    nohup $COMMAND "$1" "$2" >& /dev/null & disown
fi


#Doesn't work, so check for files first:
#if [ $? -ne 0 ]; then
#    echo "ERROR, showing..."
#    nohup meld "$1" "$2" "$3"
#fi