Vendor dependencies

Let's see how I like this workflow.

vendor/cxx/tools/buck/prelude/apple/apple_binary.bzl

@@ -0,0 +1,88 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under both the MIT license found in the
+# LICENSE-MIT file in the root directory of this source tree and the Apache
+# License, Version 2.0 found in the LICENSE-APACHE file in the root directory
+# of this source tree.
+
+load("@prelude//apple:apple_stripping.bzl", "apple_strip_args")
+load("@prelude//cxx:cxx.bzl", "get_srcs_with_flags")
+load("@prelude//cxx:cxx_executable.bzl", "cxx_executable")
+load("@prelude//cxx:cxx_library_utility.bzl", "cxx_attr_deps", "cxx_attr_exported_deps")
+load("@prelude//cxx:cxx_types.bzl", "CxxRuleConstructorParams")
+load(
+    "@prelude//cxx:link_groups.bzl",
+    "get_link_group_info",
+)
+load(
+    "@prelude//cxx:preprocessor.bzl",
+    "CPreprocessor",
+)
+load(":apple_bundle_types.bzl", "AppleMinDeploymentVersionInfo")
+load(":apple_code_signing_types.bzl", "AppleEntitlementsInfo")
+load(":apple_dsym.bzl", "AppleDebuggableInfo", "DEBUGINFO_SUBTARGET", "DSYM_SUBTARGET", "get_apple_dsym")
+load(":apple_frameworks.bzl", "get_framework_search_path_flags")
+load(":apple_link_postprocessor.bzl", "get_apple_link_postprocessor")
+load(":apple_target_sdk_version.bzl", "get_min_deployment_version_for_node", "get_min_deployment_version_target_linker_flags", "get_min_deployment_version_target_preprocessor_flags")
+load(":apple_utility.bzl", "get_apple_cxx_headers_layout")
+load(":resource_groups.bzl", "create_resource_graph")
+load(":xcode.bzl", "apple_populate_xcode_attributes")
+
+def apple_binary_impl(ctx: "context") -> ["provider"]:
+    extra_link_flags = get_min_deployment_version_target_linker_flags(ctx) + _entitlements_link_flags(ctx)
+    framework_search_path_pre = CPreprocessor(
+        args = [get_framework_search_path_flags(ctx)],
+    )
+    constructor_params = CxxRuleConstructorParams(
+        rule_type = "apple_binary",
+        headers_layout = get_apple_cxx_headers_layout(ctx),
+        extra_exported_link_flags = extra_link_flags,
+        srcs = get_srcs_with_flags(ctx),
+        extra_preprocessors = get_min_deployment_version_target_preprocessor_flags(ctx) + [framework_search_path_pre],
+        strip_executable = ctx.attrs.stripped,
+        strip_args_factory = apple_strip_args,
+        cxx_populate_xcode_attributes_func = apple_populate_xcode_attributes,
+        link_postprocessor = get_apple_link_postprocessor(ctx),
+        link_group_info = get_link_group_info(ctx),
+    )
+    (cxx_output, _comp_db_info, xcode_data_info) = cxx_executable(ctx, constructor_params)
+
+    dsym_artifact = get_apple_dsym(
+        ctx = ctx,
+        executable = cxx_output.binary,
+        external_debug_info = cxx_output.external_debug_info,
+        action_identifier = cxx_output.binary.short_path,
+    )
+    cxx_output.sub_targets[DSYM_SUBTARGET] = [DefaultInfo(default_outputs = [dsym_artifact])]
+
+    cxx_output.sub_targets[DEBUGINFO_SUBTARGET] = [DefaultInfo(other_outputs = cxx_output.external_debug_info)]
+
+    min_version = get_min_deployment_version_for_node(ctx)
+    min_version_providers = [AppleMinDeploymentVersionInfo(version = min_version)] if min_version != None else []
+
+    resource_graph = create_resource_graph(
+        ctx = ctx,
+        labels = ctx.attrs.labels,
+        deps = cxx_attr_deps(ctx),
+        exported_deps = cxx_attr_exported_deps(ctx),
+    )
+
+    return [
+        DefaultInfo(default_outputs = [cxx_output.binary], sub_targets = cxx_output.sub_targets),
+        RunInfo(args = cmd_args(cxx_output.binary).hidden(cxx_output.runtime_files)),
+        AppleEntitlementsInfo(entitlements_file = ctx.attrs.entitlements_file),
+        AppleDebuggableInfo(dsyms = [dsym_artifact], external_debug_info = cxx_output.external_debug_info),
+        xcode_data_info,
+    ] + [resource_graph] + min_version_providers
+
+def _entitlements_link_flags(ctx: "context") -> [""]:
+    return [
+        "-Xlinker",
+        "-sectcreate",
+        "-Xlinker",
+        "__TEXT",
+        "-Xlinker",
+        "__entitlements",
+        "-Xlinker",
+        ctx.attrs.entitlements_file,
+    ] if ctx.attrs.entitlements_file else []