build-kernel2.sh

#!/usr/bin/env bash
#
# By Mike Hoffert. Based on build-kernel.sh in OS161.
#
# Alternative build script. Only errors are shown. Will automatically
# configure the script.
#
# Usage:
#  ./build-kernel2 <kernel-name> [options]
#
# Parameters:
#  -q: Quiet mode -- disables all unnecessary output. Only errors will be shown.
#  -c: Clean first -- will clean before we build. Slower.
#  -r: Run on successful build
#
# Example:
#  ./build-kernel2.sh ASST2 -cr

PATH=/www/docs/classes/332/t1/os161/bin:$PATH

# Change this to redirect output into a file
OUTPUT=/dev/null

quietMode=0
cleanMode=0
runMode=0

# Skip first option
OPTIND=2

while getopts "qckur" opt; do
	case "$opt" in
	q)
		quietMode=1
		;;
	c)
		cleanMode=1
		;;
	r)
		runMode=1
		;;
	esac
done

# Clean if we're supposed to
if [ $cleanMode -eq 1 ] ; then
	if [ $quietMode -eq 0 ] ; then echo "Cleaning OS161"; fi
	./clean-kernel2.sh > "$OUTPUT"

	# Cleaning causes an issue that requires that we build twice. So we'll
	# ignore any possible errors on this initial build.
	if [ $quietMode -eq 0 ] ; then echo "Performing clean build (this can take a while)"; fi
	./conf-kernel.sh $1 > "$OUTPUT" 2>&1
	cd src
	./configure --ostree=`pwd`/../root > "$OUTPUT" 2>&1
	cd kern/compile/$1
	bmake depend > "$OUTPUT" 2>&1
	bmake > "$OUTPUT" 2>&1
	bmake install > "$OUTPUT" 2>&1
	cd ../../../
	bmake depend > "$OUTPUT" 2>&1
	bmake > "$OUTPUT" 2>&1
	bmake install > "$OUTPUT" 2>&1
	cd ..
fi

# Kind of a hacky way of writing a "try-catch" block. See:
# <http://stackoverflow.com/a/22010339/1968462>.
{
	if [ $quietMode -eq 0 ] ; then echo "Building $1"; fi
	./conf-kernel.sh $1 > "$OUTPUT" &&
	cd src &&
	./configure --ostree=`pwd`/../root > "$OUTPUT" &&
	cd kern/compile/$1 &&
	bmake depend > "$OUTPUT" &&
	bmake > "$OUTPUT" &&
	bmake install > "$OUTPUT" &&
	if [ $quietMode -eq 0 ] ; then echo "Kernel build succeeded"; fi &&
	cd ../../../ &&
	bmake depend > "$OUTPUT" &&
	bmake > "$OUTPUT" &&
	bmake install > "$OUTPUT" &&
	if [ $quietMode -eq 0 ] ; then echo  "Userspace build succeeded"; fi &&
	cd .. &&

	# We succeeded. Run the kernel
	if [ $runMode -eq 1 ] ; then ./boot-kernel.sh $1 ; fi
} || {
	echo
	echo "========================================="
	echo "==== There were errors in the build. ===="
	echo "========================================="
}