Is it possible to use environments in custom plugins There d Pants #plugins

Is it possible to use environments in custom plugi...

big-crayon-94763

06/19/2023, 6:14 PM

Is it possible to use environments in custom plugins? There doesn’t seem to be an documentation and I am struggling to piece together what I would need to do from the pants source code. Currently getting a long list of rule graph errors when doing so

fast-nail-55400

06/19/2023, 7:56 PM

Yes there is a special

Get

syntax for changing other parameters active in the rule graph. The environment in effect is one of those other parameters. See https://github.com/pantsbuild/pants/blob/0e51584547e86dd2e8d6e89755c1458ee29883cb/src/python/pants/core/goals/test.py#L948-L954 for an example.

👀 1

fast-nail-55400

06/19/2023, 7:57 PM

https://github.com/pantsbuild/pants/blob/0e51584547e86dd2e8d6e89755c1458ee29883cb/src/python/pants/core/goals/package.py#L109-L118 is a simpler example.

fast-nail-55400

06/19/2023, 7:57 PM

Copy code

package = await Get(
        BuiltPackage, {request.field_set: PackageFieldSet, environment_name: EnvironmentName}
)

fast-nail-55400

06/19/2023, 7:59 PM

This form of

Get

basically asks the engine: "Find a conversion between

PackageFieldSet

and

BuiltPackage

and set the instance of

EnvironmntName

in the rule graph to be

environment_name

during that evaluation."

fast-nail-55400

06/19/2023, 7:59 PM

and that override is in effect for that "subgraph" of the rule graph

big-crayon-94763

06/19/2023, 8:01 PM

I think that helps. Thanks. I will try and piece this together

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