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incremental_patch.sh

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#!/bin/sh

# Check if both a starting file and patch are provided

if [ $# != 2 ]; then

echo "usage: <first_file.cpp> <patch.txt>"

echo "specified patch will be applied to first_file.cpp and every code file larger than it (from later chapters)"

exit 1

fi

# Iterate over code files in order of increasing size

# i.e. in order of chapters (every chapter adds code)

apply_patch=false

for f in `ls -Sr *.cpp`

do

# Apply patch on every code file including and after initial one

if [ $f = $1 ] || [ $apply_patch = true ]; then

apply_patch=true

patch -f $f < $2 | grep -q "FAILED" > /dev/null

if [ $? = 0 ]; then

echo "failed to apply patch to $f"

exit 1

fi

rm -f *.orig

fi

done

echo "patch successfully applied to all files"

exit 0