Adding swift support and hello world example

.github/workflows/main.yml

@@ -57,3 +57,11 @@ jobs:
 
     - name: Building //python directory
       run: bazel build //python/...
+
+    - uses: swift-actions/setup-swift@v1
+      if: matrix.os == 'ubuntu-20.04'
+
+    - name: Building //swift directory
+      run: |
+        cd swift
+        bazel test --config=clang //...

WORKSPACE

@@ -2,7 +2,6 @@ workspace(name = "example")
 
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_file")
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
 
 # Some file dependencies
 http_file(

swift/.bazelrc

@@ -0,0 +1 @@
+build:clang --client_env=CC=clang

swift/.bazelversion

@@ -0,0 +1 @@
+6.0.0

swift/BUILD

@@ -0,0 +1,9 @@
+load("@build_bazel_rules_swift//swift:swift.bzl", "swift_test")
+
+swift_test(
+    name = "tests",
+    srcs = [
+        "example.swift",
+        "main.swift",
+    ],
+)

swift/WORKSPACE

@@ -0,0 +1,21 @@
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+http_archive(
+    name = "build_bazel_rules_swift",
+    sha256 = "32f95dbe6a88eb298aaa790f05065434f32a662c65ec0a6aabdaf6881e4f169f",
+    url = "https://github.com/bazelbuild/rules_swift/releases/download/1.5.0/rules_swift.1.5.0.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()

swift/example.swift

@@ -0,0 +1,29 @@
+import XCTest
+
+class SwiftTests: XCTestCase {
+    func fizzbuzz(i: Int) -> String {
+        if (i % 3 == 0) {
+            if (i % 5 == 0) {
+                return "FizzBuzz";
+            }
+            return "Fizz";
+        }
+        if (i % 5 == 0) {
+            return "Buzz";
+        }
+        return String(i);
+    }
+
+    func test() {
+        XCTAssertEqual(fizzbuzz(i: 1), "1")
+        XCTAssertEqual(fizzbuzz(i: 2), "2")
+        XCTAssertEqual(fizzbuzz(i: 3), "Fizz")
+        XCTAssertEqual(fizzbuzz(i: 4), "4")
+        XCTAssertEqual(fizzbuzz(i: 5), "Buzz")
+        XCTAssertEqual(fizzbuzz(i: 15), "FizzBuzz")
+    }
+
+    static var allTests = [
+        ("test", test),
+    ]
+}

swift/main.swift

@@ -0,0 +1,7 @@
+#if os(Linux)
+import XCTest
+
+XCTMain([
+  testCase(SwiftTests.allTests),
+])
+#endif