Problem using gnoga with Alire

[bracke]

There is a problem when trying to add gnoga to a alr proejct.

alr init --bin mytestapp
cd mytestapp
alr build
--> builds successfull

alr with gnoga
alr build
-->
error: Trying to set an already defined environment variable:
error: Target_OS is already defined as 'Linux' but new value is 'auto'

I have reported this to thew Alire project alire-project/alire#1687 but apparently it is a problem with Gnoga:

Thanks for the report. This is indeed a mistake in the metadata of both gnoga and simple_components, that should not set these variables.

[Blady-Com]

Alire support for Gnoga is actually in an exploring access mode as building app processes are different.
With Gnoga you create your app inside Gnoga file structure.
With Alire you create your app in its own file structure using components.
That being said, I'm interested to know how you build you app in order to make relevant changes.
Could you share your project?
In the mean time, I suggest to follow the proposal of mosteo, at your project root do:
% alr pin simple_components=4.62.0
and then
% alr build
should be ok.

[bracke]

@Blady-Com

Could you share your project?:

I*m just experimenting, so I literally just did what I mentioned in the issue description:

alr init --bin mytestapp
cd mytestapp
alr build
--> builds successfull

alr with gnoga
alr build
-->
error: Trying to set an already defined environment variable:
error: Target_OS is already defined as 'Linux' but new value is 'auto'

I will try with the pin.

[mosteo]

I will fix this one in the Alire index directly.

[mosteo]

Fixed in alire-project/alire-index#1082

[bracke]

@mostea
Should it work now?
I have tried alr index --update-all and then repeated the above but the result is the same.

[mosteo]

Sorry, it was not yet merged. Please try it now.

[bracke]

@mosteo I can confirm it works now.
Thank you for the quick response.