def _toolchain_alias_impl(ctx: AnalysisContext) -> list[Provider]:
return ctx.attrs.actual.providers
toolchain_alias = rule(
doc="""
toolchain_alias acts like alias but for toolchain rules.
The toolchain_alias itself is a toolchain rule and the `actual` argument is
expected to be a toolchain_rule as well.
""",
attrs={
"actual": attrs.toolchain_dep(
doc="The actual toolchain that is being aliased. This should be a toolchain rule."
)
},
impl=_toolchain_alias_impl,
is_toolchain_rule=True,
)