From cae68a5fa32f9892c88bc490c3187fccb341a489 Mon Sep 17 00:00:00 2001
From: Googler <noreply@google.com>
Date: Fri, 24 Mar 2017 23:02:00 +0000
Subject: Add "resources", "structured_resources" attrs to swift_library.

--
PiperOrigin-RevId: 151183770
MOS_MIGRATED_REVID=151183770
---
 tools/build_defs/apple/swift.bzl | 47 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/tools/build_defs/apple/swift.bzl b/tools/build_defs/apple/swift.bzl
index 12fdf6533b..41fb4d226d 100644
--- a/tools/build_defs/apple/swift.bzl
+++ b/tools/build_defs/apple/swift.bzl
@@ -328,6 +328,40 @@ def swiftc_args(ctx):
   return args
 
 
+def _collect_resource_sets(ctx, module_name):
+  """Collects resource sets from the target and its dependencies.
+
+  Args:
+    ctx: The Skylark context.
+    module_name: The name of the Swift module associated with the resources
+        (either the user-provided name, or the auto-generated one).
+  Returns:
+    A list of structs representing the transitive resources to propagate to the
+    bundling rules.
+  """
+  resource_sets = []
+
+  # Create a resource set from the resources attached directly to this target.
+  if ctx.files.resources or ctx.files.structured_resources:
+    resource_sets.append(struct(
+        bundle_dir=None,
+        infoplists=depset(),
+        objc_bundle_imports=depset(),
+        resources=depset(ctx.files.resources),
+        structured_resources=depset(ctx.files.structured_resources),
+        structured_resource_zips=depset(),
+        swift_module=module_name,
+    ))
+
+  # Collect transitive resource sets from dependencies.
+  for dep in ctx.attr.deps:
+    apple_resource = getattr(dep, "AppleResource", None)
+    if apple_resource:
+      resource_sets.extend(apple_resource.resource_sets)
+
+  return resource_sets
+
+
 def _swift_library_impl(ctx):
   """Implementation for swift_library Skylark rule."""
 
@@ -450,12 +484,17 @@ def _swift_library_impl(ctx):
       link_inputs=set([output_module]),
       uses_swift=True,)
 
+  apple_resource_provider = struct(
+      resource_sets=_collect_resource_sets(ctx, module_name)
+  )
+
   return struct(
       swift=struct(
           transitive_libs=[output_lib] + dep_libs,
           transitive_modules=[output_module] + dep_modules,
           transitive_defines=swiftc_defines),
       objc=objc_provider,
+      AppleResource=apple_resource_provider,
       files=set([output_lib, output_module, output_header]))
 
 SWIFT_LIBRARY_ATTRS = {
@@ -464,6 +503,14 @@ SWIFT_LIBRARY_ATTRS = {
     "module_name": attr.string(mandatory=False),
     "defines": attr.string_list(mandatory=False, allow_empty=True),
     "copts": attr.string_list(mandatory=False, allow_empty=True),
+    "resources": attr.label_list(
+        mandatory=False,
+        allow_empty=True,
+        allow_files=True),
+    "structured_resources": attr.label_list(
+        mandatory=False,
+        allow_empty=True,
+        allow_files=True),
     "_xcrunwrapper": attr.label(
         executable=True,
         cfg="host",
-- 
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