minko / lua issue : premake5.lua:3: attempt to index global 'minko' (a nil value) - linux

Question

I am working with minko and managed to compile MINKO SDK properly for 3 platforms (Linux, Android, HTML5) and build all tutorials / examples. Moving on to create my own project, I followed the instructions on how to use the existing skeleton project, then using an existing example project.
(I believe there is an error in the skeleton code at this line :
auto sceneManager = SceneManager::create(canvas->context()); //does not compile
where as the example file look like this :
auto sceneManager = SceneManager::create(canvas); //compile and generate binary
I was able to do so by modifying premake5.lua (to include more plugins) and calling script/solution_gmake_gcc.sh
to generate the make solution a week ago. Today, I tried to make a new project in a new folder but calling
script/solution_gmake_gcc.sh and script/clean failed with this error:
minko-master/skel_tut/mycode/premake5.lua:3: attempt to index global 'minko' (a nil value)
Now at premake5.lua line 3 there is this line : minko.project.solution(PROJECT_NAME),
however sine i am not familiar with lua at all, can anyone shed any light on the issue ?
What is supposed to be declared here, why is it failing suddenly... ?
(I can still modify,compile and run the code but i can't for example add more plug-ins)
PS: weirdly enough, the previously 'working' project is also failing at this point.
Thanks.

Answer 1

PROJECT_NAME = path.getname(os.getcwd())
minko.project.application("minko-tutorial-" .. PROJECT_NAME)
files { "src/**.cpp", "src/**.hpp", "asset/**" }
includedirs { "src" }
-- plugins
minko.plugin.enable("sdl")
minko.plugin.enable("assimp")
minko.plugin.enable("jpeg")
minko.plugin.enable("bullet")
minko.plugin.enable("png")
--html overlay
minko.plugin.enable("html-overlay")
Assuming that's indeed your project premake5.lua file (please us the code tags next time), you should have include "script" at the beginning of the file:
https://github.com/aerys/minko/blob/master/skeleton/premake5.lua#L1
If you don't have this line, it will not include script/premake5.lua which is in charge of including the SDK build system files that defines everything inside the minko Lua namespace/table. That's why you get that error.
I think you copy pasted one of the examples/tutorials premake5.lua file instead of modifying the one provided by the skeleton. The premake conf file of the examples/tutorials are different since they are included from the SDK premake files. But your app premake5.lua does the "opposite": it includes the SDK conf files rather than being included by them.
The best practice is to edit your app's copy of the skeleton's premake5.lua (instead of copy/pasting one from the examples/tutorials).

Answer 2

(I believe there is an error in the skeleton code at this line :
That's possible. Our build server doesn't test the skeleton code. That's a mistake we will fix ASAP to make sure it works properly.
script/solution_gmake_gcc.sh and script/clean failed with this error:
minko-master/skel_tut/mycode/premake5.lua:3: attempt to index global 'minko' (a nil value)
Could you copy/paste your premake5.lua file?
Also, what's the value you set for the MINKO_HOME env var? Maybe you've moved the SDK...
Note that instead of setting a global MINKO_HOME env var, you can also set the corresponding LUA constant at the very begining of your premake5.lua file.