tools/build: add some options

tools/asan_suppressions.txt

@@ -1,3 +1,3 @@
 leak:libfontconfig
 leak:libglib-2.0
-
+leak:libxcb*

tools/build

@@ -3,17 +3,57 @@
 # Automatically build labwc
 #
 
-builddir=build-clang
+builddir=build
+g_asan=
+g_wlroots=
 
-if ! [ -e subprojects/wlroots ]; then
-	git clone https://github.com/swaywm/wlroots subprojects/wlroots
-fi
+die () { printf '\033[31mfatal:\033[m %b\n' "$@" >&2 ; exit 1 ; }
+warn () { printf '\033[31mwarn:\033[m %b\n' "$@" >&2 ; }
+say () { printf '\033[32m%s\033[m' "$@" ; }
 
+usage () {
+	printf "%s\n" \
+"Usage: ./tools/build [<options>]
+Options:
+-w             install wlroots as subproject
+--asan         run with ASAN and UBSAN
+--clang        run with clang
+-h, --help     show help"
+	exit 0
+}
 
-if ! [ -e ${builddir} ]; then
-	CC=clang meson -Dwlroots:default_library=static ${builddir}
-	# To enable ASAN and UBSAN, run meson with
-	# `-Db_sanitize=address,undefined`
-fi
+wlroots_subproject () {
+	if ! [ -e subprojects/wlroots ]; then
+		git clone https://github.com/swaywm/wlroots subprojects/wlroots
+	fi
+}
 
-ninja -C ${builddir}
+main () {
+	[[ -e src/main.c ]] || die "must be run from top-level directory"
+
+	for arg
+	do
+		opt=${arg%%=*}
+		var=${arg#*=}
+		case "$opt" in
+		-w)
+			wlroots_subproject
+			g_wlroots="-Dwlroots:default_library=static"
+			;;
+		--asan)
+			g_asan="-Db_sanitize=address,undefined" ;;
+		--clang)
+			export CC=clang
+			;;
+		-h|--help)
+			usage ;;
+		esac
+	done
+
+	[ -e ${builddir} ] && die "build directory already exists - delete and run again"
+	meson ${g_asan} ${g_wlroots} ${builddir}
+	ninja -C ${builddir}
+	LSAN_OPTIONS=suppressions=../tools/asan_suppressions.txt ninja -C ${builddir} test
+}
+
+main "$@"