delaying load of recipe until it is required by builders

[grisumbras]

Changelog: Bugfix: Fixes #331

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[grisumbras]

I haven't touched any tests yet, just wanted to check if this is a direction that could be pursued. The basic idea is to replace code that potentially loads the recipe with code that creates objects that lazily load the recipe. As a result, the recipe isn't loaded until its attributes are required by builders, which happens after all remotes have been already added (at least in theory).

[uilianries]

The idea sounds good, delaying the recipe seems be the best approach to solve python requires in CPT. Thanks for your contribution! WDYT @lasote ?

[lasote]

Sounds complex and error prone to be honest.

[grisumbras]

Alternatively, we could just add necessary remotes in constructor.

[lasote]

Would be worth it to try it, yes.

[grisumbras]

That is what I originally wanted to do, but then I thought, that there is a reason why adding remotes wasn't put into constructor but into run method in the first place.