Build of Boost Cleanup (#707)

* Updated to check the boost SHA256 when downloading

* Fixed invalid shell option

* Allow the user to request a minimal build of Boost

* Ensure boost build script exits on error

* Removed apparently unused "mkdir"

ci/bootstrap_boost.sh

@@ -1,18 +1,37 @@
 #!/usr/bin/env bash
 
-set -o unset
+set -o nounset
+set -o errexit
 set -o xtrace
 
+bootstrapArgs=()
+while getopts 'm' OPT; do
+	case "${OPT}" in
+		m)
+			bootstrapArgs+=('--with-libraries=atomic,chrono,thread,log,date_time,filesystem,program_options,regex')
+			;;
+	esac
+done
+
 BOOST_BASENAME=boost_1_66_0
 BOOST_ROOT=${BOOST_ROOT-/usr/local/boost}
 BOOST_URL=https://downloads.sourceforge.net/project/boost/boost/1.66.0/${BOOST_BASENAME}.tar.bz2
+BOOST_ARCHIVE="${BOOST_BASENAME}.tar.bz2"
+BOOST_ARCHIVE_SHA256='5721818253e6a0989583192f96782c4a98eb6204965316df9f5ad75819225ca9'
 
-wget --quiet -O ${BOOST_BASENAME}.tar.gz "${BOOST_URL}"
-tar xf ${BOOST_BASENAME}.tar.gz
+wget --quiet -O "${BOOST_ARCHIVE}.new" "${BOOST_URL}"
+checkHash="$(openssl dgst -sha256 "${BOOST_ARCHIVE}.new" | sed 's@^.*= *@@')"
+if [ "${checkHash}" != "${BOOST_ARCHIVE_SHA256}" ]; then
+	echo "Checksum mismatch.  Expected ${BOOST_ARCHIVE_SHA256}, got ${checkHash}" >&2
+
+	exit 1
+fi
+mv "${BOOST_ARCHIVE}.new" "${BOOST_ARCHIVE}"
+
+tar xf "${BOOST_ARCHIVE}"
 cd ${BOOST_BASENAME}
-./bootstrap.sh
+./bootstrap.sh "${bootstrapArgs[@]}"
 ./b2 -d0 --prefix=${BOOST_ROOT} link=static install
 cd ..
 rm -rf ${BOOST_BASENAME}
-rm -f ${BOOST_BASENAME}.tar.gz
-mkdir -p app
+rm -f "${BOOST_ARCHIVE}"