repl

#!/usr/bin/env bash

if [ "${1:0:1}" == "-" ]; then
    flags="$1"
    shift
fi

exp=$1

shift

if [ $# -eq 0 ]; then
    files=$(git ls-files)
elif [ "$1" == "-p" ]; then
    shift
    files=$(find . -type f -name $1 | xargs git ls-files)
else
    files=$@
fi

if [ "$PROMPT" == "" ]; then
    PROMPT=1
fi

if [ -z $DIFF ]
then
    DIFF=diff
fi

echo $exp
echo $path

num_files_copied=0

for f in $files; do
    echo "Examining $f..."
    grep -I '' $f > /dev/null;
    if [ $? -ne 0 ]; then
	echo "Skipping binary file: $f"
	continue
    fi
    tmp="/tmp/${f##*/}.bak"
    backup="$tmp.bak"
    cat $f | perl -p $flags -e "$exp" > $tmp
    diff -q $f $tmp
    if [ $? -ne 0 ]
    then
	if [ $PROMPT -eq 0 ]
	then
	    echo "Swapping $tmp and $f..."
	    cp $f $backup
	    cp $tmp $f
	    mv $backup $tmp
            let num_files_copied=$num_files_copied+1
	else
	    show_diff=1
	    while [ $show_diff -eq 1 ]
	    do
    		$DIFF $f $tmp
    		while [ 1 ]
    		do
    		    echo -n "Copy changes? [Y/n/d to see diff again]: "
    		    read answer
    		    if [ "$answer" == "n" -o "$answer" == "N" ]
		    then
    			echo "Skipping..."
			show_diff=0
    			break
    		    elif [ -z "$answer" -o "$answer" == "y" -o "$answer" == "Y" ]
    		    then
    			echo "Copying..."
			show_diff=0
			cp $f $backup
			cp $tmp $f
			mv $backup $tmp
                        let num_files_copied=$num_files_copied+1
    			break
		    elif [ "$answer" == "d" -o "$answer" == "D" ]
		    then
			show_diff=1
			break
    		    else
    			echo "Invalid response. Try again."
    		    fi
    		done
	    done
	fi
    #else
	#echo "No match for: $f"
    fi
done

echo "All done. $num_files_copied files modified."