Bash function that compares files containing key-value pairs.

kvdiff

#$1,2 = files containing x=y style key-values
#sort, awk, grep friendly
#Duplicate keys are not handled
function kvdiff() {
    tmpfile=`mktemp`
    OLD_IFS=$IFS;
    IFS=$'\n'

    declare -A left;
    declare -A right;

    #Read files into arrays
    for i in `cat "$1"`;
    do
        v="`echo $i | awk -F '[= ]+' '{print $2;}' | sed 's/\r//g;'`"
        if [ -z $v ];
        then
            v="<null>"
        fi
        left["`echo $i | awk -F '[= ]+' '{print $1;}'`"]="$v"
    done

    for i in `cat "$2"`;
    do
        v="`echo $i | awk -F '[= ]+' '{print $2;}' | sed 's/\r//g;'`"
        if [ -z $v ];
        then
            v="<null>"
        fi

        right["`echo $i | awk -F '[= ]+' '{print $1;}'`"]="$v"
        done

    #Printing
    IFS=$OLD_IFS 
    for k in "${!left[@]}";
    do           
        v=${left[$k]};
        if [ ${right[$k]} ];
        then        
            if [[ "$v" == "${right[$k]}" ]];
            then
                echo "Matches:    $k=$v" >> "$tmpfile"
            else            
                echo "Differs:    $k => ${v} _VS_  ${right[$k]}" >> "$tmpfile"
            fi                              
        unset -v right[$k]
        else
            echo "Left only:  $k=$v" >> "$tmpfile"
        fi
    done                                                     
        
    for k in ${!right[@]};
    do                  
        v=${right[$k]};
        echo "Right only: $k=$v" >> "$tmpfile"          
    done             
            
    cat "$tmpfile" | sort
          
    rm -rf "$tmpfile"
}