Example

.bazelrc

@@ -0,0 +1,3 @@
+build --apple_platform_type=ios
+build --verbose_failures
+build --use_top_level_targets_for_symlinks

.bazelversion

@@ -0,0 +1 @@
+4.1.0

.gitignore

@@ -0,0 +1 @@
+bazel-*

BUILD

@@ -0,0 +1,13 @@
+load("@build_bazel_rules_swift//swift:swift.bzl", "swift_library")
+
+swift_library(
+    name = "MyLib",
+    srcs = glob(["Sources/*.swift"]),
+    copts = [
+        "-Xcc",
+        "-fmodule-map-file=Sources/Dummy.modulemap",
+    ],
+    data = ['Sources/Dummy.modulemap', 'Sources/Dummy-umbrella.h'],
+    module_name = "MyLib",
+    visibility = ["//visibility:public"],
+)

Sources/Dummy-umbrella.h

@@ -0,0 +1,15 @@
+#ifdef __OBJC__
+#import <UIKit/UIKit.h>
+#else
+#ifndef FOUNDATION_EXPORT
+#if defined(__cplusplus)
+#define FOUNDATION_EXPORT extern "C"
+#else
+#define FOUNDATION_EXPORT extern
+#endif
+#endif
+#endif
+
+
+FOUNDATION_EXPORT double DummyVersionNumber;
+FOUNDATION_EXPORT const unsigned char DummyVersionString[];

Sources/Dummy.modulemap

@@ -0,0 +1,6 @@
+module Dummy {
+  umbrella header "Dummy-umbrella.h"
+
+  export *
+  module * { export * }
+}

Sources/OtherClass.swift

@@ -0,0 +1,10 @@
+import UIKit
+
+class OtherClass {
+
+  private let vc: UIViewController
+
+  init() {
+    vc = UIViewController()
+  }
+}

Sources/SomeClass.swift

@@ -0,0 +1,10 @@
+import UIKit
+
+class SomeClass {
+
+  private let vc: UIViewController
+
+  init() {
+    vc = UIViewController()
+  }
+}

WORKSPACE

@@ -0,0 +1,21 @@
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+http_archive(
+    name = "build_bazel_rules_swift",
+    sha256 = "4f167e5dbb49b082c5b7f49ee688630d69fb96f15c84c448faa2e97a5780dbbc",
+    url = "https://github.com/bazelbuild/rules_swift/releases/download/0.24.0/rules_swift.0.24.0.tar.gz",
+)
+
+load(
+    "@build_bazel_rules_swift//swift:repositories.bzl",
+    "swift_rules_dependencies",
+)
+
+swift_rules_dependencies()
+
+load(
+    "@build_bazel_rules_swift//swift:extras.bzl",
+    "swift_rules_extra_dependencies",
+)
+
+swift_rules_extra_dependencies()

build.sh

@@ -0,0 +1 @@
+bazel build //:MyLib