Add bootstrap Makefile create premake initial executable

On a fresh clone, Bootstrap.mak can be used to prepare the initial premake executable on Windows, OSX and Linux.

BUILD.txt

@@ -26,7 +26,18 @@ BUILDING FROM A SOURCE PACKAGE
 
 BUILDING FROM THE REPOSITORY
 
- If you have pulled sources from the Premake source repository, you will need
+ If you have pulled sources from the Premake source repository, you can
+ use `Bootstrap.mak` to generate your first premake executable:
+
+    $ git submodule init
+    $ git submodule update
+    $ make -f Bootstrap.mak PLATFORM
+
+ Where PLATFORM can be osx or linux. On Windows use nmake:
+
+    $ nmake -f Bootstrap.mak windows
+
+ If your toolset is not supported by the bootstrap Makefile, you will need
  to embed the scripts into a C source file so they may be built into the
  executable, and also generate the project files for your chosen toolset. In
  order do either of these things, you will need a working Premake executable.

Bootstrap.mak

@@ -0,0 +1,64 @@
+LUA_DIR=src/host/lua-5.1.4/src
+
+SRC= src/host/*.c \
+$(LUA_DIR)/lapi.c 		\
+$(LUA_DIR)/lcode.c		\
+$(LUA_DIR)/ldebug.c 	\
+$(LUA_DIR)/ldump.c		\
+$(LUA_DIR)/lgc.c			\
+$(LUA_DIR)/liolib.c 	\
+$(LUA_DIR)/lmathlib.c \
+$(LUA_DIR)/loadlib.c	\
+$(LUA_DIR)/lopcodes.c \
+$(LUA_DIR)/lparser.c	\
+$(LUA_DIR)/lstring.c	\
+$(LUA_DIR)/ltable.c 	\
+$(LUA_DIR)/ltm.c			\
+$(LUA_DIR)/lvm.c			\
+$(LUA_DIR)/lbaselib.c \
+$(LUA_DIR)/ldblib.c 	\
+$(LUA_DIR)/ldo.c			\
+$(LUA_DIR)/lfunc.c		\
+$(LUA_DIR)/linit.c		\
+$(LUA_DIR)/llex.c 		\
+$(LUA_DIR)/lmem.c 		\
+$(LUA_DIR)/lobject.c	\
+$(LUA_DIR)/loslib.c 	\
+$(LUA_DIR)/lstate.c 	\
+$(LUA_DIR)/lstrlib.c	\
+$(LUA_DIR)/ltablib.c	\
+$(LUA_DIR)/lundump.c	\
+$(LUA_DIR)/lzio.c
+
+PLATFORM= none
+default: $(PLATFORM)
+
+none:
+	@echo "Please do"
+	@echo "   nmake -f Bootstrap.mak windows"
+	@echo "or"
+	@echo "   make -f Bootstrap.mak PLATFORM"
+	@echo "where PLATFORM is one of these:"
+	@echo "   osx linux"
+
+osx: $(SRC)
+	mkdir -p build/bootstrap
+	$(CC) -o build/bootstrap/premake_bootstrap -DPREMAKE_NO_BUILTIN_SCRIPTS -I"$(LUA_DIR)" -framework CoreServices $?
+	./build/bootstrap/premake_bootstrap embed
+	./build/bootstrap/premake_bootstrap --to=build/bootstrap gmake
+	$(MAKE) -C build/bootstrap -j`getconf _NPROCESSORS_ONLN`
+
+linux: $(SRC)
+	mkdir -p build/bootstrap
+	$(CC) -o build/bootstrap/premake_bootstrap -DPREMAKE_NO_BUILTIN_SCRIPTS -I"$(LUA_DIR)" $? -lm
+	./build/bootstrap/premake_bootstrap embed
+	./build/bootstrap/premake_bootstrap --to=build/bootstrap gmake
+	$(MAKE) -C build/bootstrap -j`getconf _NPROCESSORS_ONLN`
+
+windows: $(SRC)
+	if not exist build\bootstrap (mkdir build\bootstrap)
+	cl /Fo.\build\bootstrap\ /Fe.\build\bootstrap\premake_bootstrap.exe /DPREMAKE_NO_BUILTIN_SCRIPTS /I"$(LUA_DIR)" user32.lib ole32.lib $**
+	.\build\bootstrap\premake_bootstrap.exe embed
+	.\build\bootstrap\premake_bootstrap --to=build/bootstrap vs2012
+	devenv .\build\bootstrap\Premake5.sln /Upgrade
+	devenv .\build\bootstrap\Premake5.sln /Build Release

scripts/package.lua

@@ -129,7 +129,7 @@
 		for _, name in ipairs { ".git" } do
 			os.rmdir(path.join(module, name))
 		end
-		for _, name in ipairs { ".DS_Store", ".git", ".gitignore", ".gitmodules", ".travis.yml", ".editorconfig" } do
+		for _, name in ipairs { ".DS_Store", ".git", ".gitignore", ".gitmodules", ".travis.yml", ".editorconfig", "Bootstrap.mak" } do
 			os.remove(path.join(module, name))
 		end
 	end

src/host/premake.c

@@ -293,6 +293,7 @@ int premake_test_file(lua_State* L, const char* filename, int searchMask)
 		if (path && do_locate(L, filename, path)) return OKAY;
 	}
 
+	#if !defined(PREMAKE_NO_BUILTIN_SCRIPTS)
 	if ((searchMask & TEST_EMBEDDED) != 0) {
 		/* Try to locate a record matching the filename */
 		for (i = 0; builtin_scripts_index[i] != NULL; ++i) {
@@ -304,6 +305,7 @@ int premake_test_file(lua_State* L, const char* filename, int searchMask)
 			}
 		}
 	}
+	#endif
 
 	return !OKAY;
 }
@@ -475,12 +477,14 @@ int premake_load_embedded_script(lua_State* L, const char* filename)
 #endif
 
 	/* Try to locate a record matching the filename */
+	#if !defined(PREMAKE_NO_BUILTIN_SCRIPTS)
 	for (i = 0; builtin_scripts_index[i] != NULL; ++i) {
 		if (strcmp(builtin_scripts_index[i], filename) == 0) {
 			chunk = builtin_scripts[i];
 			break;
 		}
 	}
+	#endif
 
 	if (chunk == NULL) {
 		return !OKAY;