Build xnu (Darwin) kernel script

buildxnu.sh

#!/usr/bin/env bash

#############################################
# Builds the latest xnu (Darwin) kernel     #
# create a directory to do this in first!!! #
# it cleans the downloaded files after      #
# ya homie, @alvaromuir                     #
#############################################

export PATH="/usr/local/bin:$PATH"

CURL="curl -O "

# set dem variables, son!

DTRACE=dtrace-118.1
AVAILVER=AvailabilityVersions-6
KERNEL=xnu-2422.1.72

echo "Checking for dtrace ..."
command -v dtrace >/dev/null 2>&1 || {
  echo >&2 "dtrace required, but it's not installed. Installing now.";
  $CURL http://www.opensource.apple.com/tarballs/dtrace/$DTRACE.tar.gz \
  && tar xzf $DTRACE.tar.gz \
  && cd $DTRACE \
  && mkdir -p obj sym dst \
  && xcodebuild install -target ctfconvert -target ctfdump -target ctfmerge \
    ARCHS="x86_64" SRCROOT=$PWD OBJROOT=$PWD/obj SYMROOT=$PWD/sym \
    DSTROOT=$PWD/dst \
  && sudo ditto $PWD/dst/usr/local /usr/local \
  && cd .. \
  && echo "Cleaning up downloaded sources" \
  && rm -rf $DTRACE*
  }



echo "Checking for Availability Versions ..."
if [ ! -f `xcrun -sdk / -show-sdk-path`/usr/local/libexec/availability.pl ]; then
  echo "Availability Versions required, but not installed. Installing now."
  $CURL http://opensource.apple.com/tarballs/AvailabilityVersions/$AVAILVER.tar.gz \
  && tar xzf $AVAILVER.tar.gz \
  && cd $AVAILVER \
  && mkdir -p dst \
  && make install SRCROOT=$PWD DSTROOT=$PWD/dst \
  && sudo ditto $PWD/dst/usr/local `xcrun -sdk / -show-sdk-path`/usr/local \
  && cd .. \
  && echo "Cleaning up downloaded sources" \
  && rm -rf $AVAILVER*
fi

echo "Getting xnu kernel (Darwin) ..."
rm -rf $KERNEL* \
&& $CURL http://opensource.apple.com/tarballs/xnu/$KERNEL.tar.gz \
&& tar xzf $KERNEL.tar.gz \
&& cd $KERNEL;

## revise MakeInc.def
if [ -f makedefs/MakeInc.def ]; then
  sed -i"any_symbol" 's/-Werror//' makedefs/MakeInc.def;
fi
make TARGET_CONFIGS="release x86_64 default" SDKROOT=`xcrun -sdk / -show-sdk-path`;


cd .. \
&& echo "Cleaning up downloaded sources" \
&& rm -rf $KERNEL.tar.gz