Setup a basic run of cmake-smoke-test in CI

Author: owenv

.github/workflows/pull_request.yml

@@ -45,6 +45,21 @@ jobs:
       linux_swift_versions: '["nightly-main", "nightly-6.2"]'
       windows_swift_versions: '["nightly-main"]'
       windows_build_command: 'swift test --no-parallel'
+  cmake-smoke-test:
+    name: cmake-smoke-test
+    uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@main
+    with:
+      linux_os_versions: '["noble"]'
+      linux_pre_build_command: |
+        apt-get update -y
+
+        # Build dependencies
+        apt-get install -y libsqlite3-dev libncurses-dev
+
+        apt-get install -y cmake ninja-build
+      linux_build_command: 'swift package cmake-smoke-test --disable-sandbox --cmake-path `which cmake` --ninja-path `which ninja`'
+      linux_swift_versions: '["nightly-main"]'
+      windows_swift_versions: '[]'
   soundness:
     name: Soundness
     uses: swiftlang/github-workflows/.github/workflows/soundness.yml@main

Plugins/cmake-smoke-test/cmake-smoke-test.swift

@@ -33,6 +33,7 @@ struct CMakeSmokeTest: CommandPlugin {
         if let sysrootPath {
             print("using sysroot at \(sysrootPath)")
         }
+        let extraCMakeArgs = args.extractOption(named: "extra-cmake-arg")
 
         let moduleCachePath = context.pluginWorkDirectoryURL.appending(component: "module-cache").path()
 
@@ -80,7 +81,7 @@ struct CMakeSmokeTest: CommandPlugin {
             "-DCMAKE_MAKE_PROGRAM=\(ninjaPath)",
             "-DCMAKE_BUILD_TYPE:=Debug",
             "-DCMAKE_Swift_FLAGS='\(sharedSwiftFlags.joined(separator: " "))'"
-        ] + cMakeProjectArgs
+        ] + cMakeProjectArgs + extraCMakeArgs
 
         print("Building swift-tools-support-core")
         try await Process.checkNonZeroExit(url: cmakeURL, arguments: sharedCMakeArgs + [swiftToolsSupportCoreURL.path()], workingDirectory: swiftToolsSupportCoreBuildURL)