lua,build: define version

2 files changed, 18 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 6eaa516..aaac99a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,15 @@
 -include config.mk
 
+VERSION = 0.1
+GIT_REV := $(shell test -d .git && git describe --always --dirty || echo exported)
+
+ifneq ($(GIT_REV), exported)
+FULL_VERSION := $(GIT_REV)
+FULL_VERSION := $(patsubst v%,%,$(FULL_VERSION))
+else
+FULL_VERSION := $(VERSION)
+endif
+
 ABI_VERSION := 0
 SONAME := libuniso.so.$(ABI_VERSION)
 
@@ -9,7 +19,7 @@ INCLUDES := uniso.h
 TARGETS = libuniso.a $(progs-y) $(shlibs-y) $(lualibs-y)
 
 CFLAGS ?= -g -Wall -Werror
-CFLAGS += -fPIC
+CFLAGS += -fPIC -I. -DVERSION=\"$(FULL_VERSION)\"
 CFLAGS += -I.
 
 LDFLAGS += -L.
diff --git a/lua-uniso.c b/lua-uniso.c
index ec1cb91..58559de 100644
--- a/lua-uniso.c
+++ b/lua-uniso.c
@@ -12,6 +12,10 @@
 
 #define MODULE_NAME "uniso"
 
+#ifndef VERSION
+#define VERSION "unknown version"
+#endif
+
 struct l_uniso_context {
 	lua_State *L;
 	int callback_ref;
@@ -77,6 +81,9 @@ static const luaL_reg methods[] = {
 LUALIB_API int luaopen_uniso(lua_State *L)
 {
 	luaL_openlib(L, MODULE_NAME, methods, 0);
+	lua_pushliteral(L, "version");
+	lua_pushliteral(L, VERSION);
+	lua_settable(L, -3);
 	return 1;
 }