Add subrule_ctx.info_file

[jacky8hyf]

Description of the feature request:

Add subrule_ctx.info_file so that we can access the content of ctx.info_file within a subrule.

Which category does this issue belong to?

Rules API

What underlying problem are you trying to solve with this feature?

I am trying to access ctx.info_file within a subrule.

Which operating system are you running Bazel on?

Linux

What is the output of bazel info release?

release 8.0.0

If bazel info release returns development version or (@non-git), tell us how you built Bazel.

No response

What's the output of git remote get-url origin; git rev-parse HEAD ?

Have you found anything relevant by searching the web?

https://docs.google.com/document/d/1RbNC88QieKvBEwir7iV5zZU08AaMlOzxhVkPnmKDedQ

suggests that:

info_file, version_file: Special inputs to the rules. Most likely the rule should keep control over them. Prefer to keep them on the rule-level only and pass them to subrules.

Can we add info_file to subrule_ctx?

Any other information, logs, or outputs that you want to share?

No response

[comius]

cc @hvadehra

[hvadehra]

This should not be needed. subrule implementations can receive parameters. So you could have:

def _subrule_impl(ctx, info_file, _sub_dep):
  # whatever

my_subrule = subrule(_subrule_impl, attrs = {"_sub_dep":attr.label()})

def _rule_impl(ctx):
  sub_result = my_subrule(ctx.info_file)
  # whatever

my_rule = rule(_rule_impl, subrules = [my_subrule])