Fix derive files with bitcode (bazelbuild#509)

Author: keith

swift/internal/xcode_swift_toolchain.bzl

@@ -319,7 +319,6 @@ def _all_action_configs(
         swift_toolchain_config.action_config(
             actions = [
                 swift_action_names.COMPILE,
-                swift_action_names.DERIVE_FILES,
                 swift_action_names.PRECOMPILE_C_MODULE,
             ],
             configurators = [swift_toolchain_config.add_arg("-embed-bitcode")],
@@ -328,7 +327,6 @@ def _all_action_configs(
         swift_toolchain_config.action_config(
             actions = [
                 swift_action_names.COMPILE,
-                swift_action_names.DERIVE_FILES,
                 swift_action_names.PRECOMPILE_C_MODULE,
             ],
             configurators = [

test/BUILD

@@ -32,3 +32,11 @@ bzl_library(
         "//test/rules:starlark_tests_bzls",
     ],
 )
+
+# TODO: Remove once https://github.com/bazelbuild/bazel/pull/10945 lands
+config_setting(
+    name = "linux",
+    constraint_values = [
+        "@bazel_tools//platforms:linux",
+    ],
+)

test/split_derived_files_tests.bzl

@@ -64,6 +64,22 @@ split_swiftmodule_indexing_test = make_action_command_line_test_rule(
         ],
     },
 )
+split_swiftmodule_bitcode_test = make_action_command_line_test_rule(
+    config_settings = {
+        "//command_line_option:apple_bitcode": "embedded",
+        "//command_line_option:features": [
+            "swift.split_derived_files_generation",
+        ],
+    },
+)
+split_swiftmodule_bitcode_markers_test = make_action_command_line_test_rule(
+    config_settings = {
+        "//command_line_option:apple_bitcode": "embedded_markers",
+        "//command_line_option:features": [
+            "swift.split_derived_files_generation",
+        ],
+    },
+)
 
 def split_derived_files_test_suite(name = "split_derived_files"):
     """Test suite for split derived files options.
@@ -256,6 +272,52 @@ def split_derived_files_test_suite(name = "split_derived_files"):
         target_under_test = "@build_bazel_rules_swift//test/fixtures/debug_settings:simple",
     )
 
+    split_swiftmodule_bitcode_test(
+        name = "{}_bitcode_compile".format(name),
+        expected_argv = select({
+            "//test:linux": [],
+            "//conditions:default": [
+                "-embed-bitcode",
+            ],
+        }),
+        mnemonic = "SwiftCompile",
+        tags = [name],
+        target_under_test = "@build_bazel_rules_swift//test/fixtures/debug_settings:simple",
+    )
+
+    split_swiftmodule_bitcode_test(
+        name = "{}_bitcode_derive_files".format(name),
+        not_expected_argv = [
+            "-embed-bitcode",
+        ],
+        mnemonic = "SwiftDeriveFiles",
+        tags = [name],
+        target_under_test = "@build_bazel_rules_swift//test/fixtures/debug_settings:simple",
+    )
+
+    split_swiftmodule_bitcode_markers_test(
+        name = "{}_bitcode_markers_compile".format(name),
+        expected_argv = select({
+            "//test:linux": [],
+            "//conditions:default": [
+                "-embed-bitcode-marker",
+            ],
+        }),
+        mnemonic = "SwiftCompile",
+        tags = [name],
+        target_under_test = "@build_bazel_rules_swift//test/fixtures/debug_settings:simple",
+    )
+
+    split_swiftmodule_bitcode_markers_test(
+        name = "{}_bitcode_markers_derive_files".format(name),
+        not_expected_argv = [
+            "-embed-bitcode-marker",
+        ],
+        mnemonic = "SwiftDeriveFiles",
+        tags = [name],
+        target_under_test = "@build_bazel_rules_swift//test/fixtures/debug_settings:simple",
+    )
+
     native.test_suite(
         name = name,
         tags = [name],