D24955: Fix sagemath backend when there is no sage-env

[Nikita Sirgienko]

sirgienko added a comment.


  But what about older versions? For example, user can use Cantor 19.12 with sage 8.1 (yes, retrograde, but this is possible). I think, we should add some checking and use something like
  
    ...
    else version < 8.9
        exit 1
  
  so, we won't miss situations, when we don't found `sage-env` for versions, where this is needed.

REPOSITORY
  R55 Cantor

REVISION DETAIL
  https://phabricator.kde.org/D24955

To: arojas, sirgienko
Cc: kde-edu, narvaez, apol
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