iwyu_remove_superfluous.sh

#!/bin/sh

function process_file() {
    [ -z "$FILE" -o -z "$RANGES" ] && return 0
    echo -e $RANGES | sed 's/-/,/' | sort -nr | while read RANGE
    do
        sed -i $RANGE"d" $FILE
    done
    FILE=""
    RANGES=""
}

FILE=""
while read LINE
do
    if echo $LINE | grep -q "should remove"
    then
        process_file
        FILE=`echo $LINE | sed 's/ should remove.*//'`
        echo $FILE
    fi

    if echo $LINE | grep -q "^- .*"
    then
        echo $LINE
        RANGE=`echo $LINE | sed 's/^.* lines //'`
        [ -n "$RANGES" ] && RANGES="$RANGES\n"
        RANGES="$RANGES$RANGE"
    fi
done

process_file