>> add install recipes

Makefile

@@ -1,23 +1,26 @@
 SOURCES=*.go
 LINKER_FLAGS=-X main.OwlVersion=`git describe --tags --dirty`
-ifeq (${XDG_DATA_HOME},)
-	XDG_DATA_HOME=${HOME}/.local/share
-endif
-MAN_DIR=${XDG_DATA_HOME}/man/man1
-BIN_DIR=${HOME}/.local/bin
+INSTALL_DIR=${HOME}/.local
 
 owl: ${SOURCES}
 	go build -o owl -ldflags "${LINKER_FLAGS}" -- ${SOURCES}
+
 owl.1: man.md
 	pandoc -s --shift-heading-level-by=-1 --to=man man.md > owl.1
+
 build: owl owl.1
+
 test: *.go
 	go test -v .
-install: build
-	install -m 0777 owl ${BIN_DIR}
-	mkdir -p ${MAN_DIR}
-	install owl.1 ${MAN_DIR}
+
+install:
+	install -m 0755 -D owl ${INSTALL_DIR}/bin/owl
+	install -m 0644 -D owl.1 ${INSTALL_DIR}/man/man1/owl.1
+	install -m 0644 -D LICENSE ${INSTALL_DIR}/share/doc/LICENSE
+
 uninstall:
-	rm -I ${BIN_DIR}/owl ${MAN_DIR}/owl.1
+	rm -I ${INSTALL_DIR}/bin/owl \
+		${INSTALL_DIR}/man/man1/owl.1 \
+		${INSTALL_DIR}/share/doc/LICENSE
 
 .PHONY: build test install uninstall