src/main/starlark/builtins_bzl/common/xcode/xcode_config_alias.bzl

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#
# Licensed under the Apache License, Version 2.0 (the "License");
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#    http://www.apache.org/licenses/LICENSE-2.0
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"""Definition for the `xcode_config_alias` rule.

This rule is an alias to the `xcode_config` rule currently in use, which in turn
depends on the current configuration; in particular, the value of the
`--xcode_version_config`.

This is intentionally undocumented for users; the workspace is expected to
contain exactly one instance of this rule under `@bazel_tools//tools/osx` and
people who want to get data this rule provides should depend on that one.
"""

load(":common/objc/apple_common.bzl", "apple_common")
load(":common/xcode/providers.bzl", "XcodeVersionPropertiesInfo")

def _xcode_config_alias_impl(ctx):
    xcode_config = ctx.attr._xcode_config
    return [
        xcode_config[XcodeVersionPropertiesInfo],
        xcode_config[apple_common.XcodeVersionConfig],
    ]

xcode_config_alias = rule(
    attrs = {
        "_xcode_config": attr.label(
            default = configuration_field(
                fragment = "apple",
                name = "xcode_config_label",
            ),
        ),
    },
    fragments = ["apple"],
    implementation = _xcode_config_alias_impl,
)