Add environment variable to force building as dynamic library

colemancda · colemancda · commit 639d0bbafda2 · 2022-05-06T01:20:02.000-07:00
diff --git a/Package.swift b/Package.swift
@@ -1,9 +1,12 @@
 // swift-tools-version:5.1
 import PackageDescription
+import class Foundation.ProcessInfo
 
-let libraryType: PackageDescription.Product.Library.LibraryType = .static
+// force building as dynamic library
+let dynamicLibrary = ProcessInfo.processInfo.environment["SWIFT_BUILD_DYNAMIC_LIBRARY"] != nil
+let libraryType: PackageDescription.Product.Library.LibraryType? = dynamicLibrary ? .dynamic : nil
 
-let package = Package(
+var package = Package(
     name: "TLVCoding",
     products: [
         .library(
@@ -13,7 +16,23 @@ let package = Package(
         )
     ],
     targets: [
-        .target(name: "TLVCoding", path: "./Sources"),
-        .testTarget(name: "TLVCodingTests", dependencies: ["TLVCoding"])
+        .target(
+            name: "TLVCoding",
+            path: "./Sources"
+        ),
+        .testTarget(
+            name: "TLVCodingTests",
+            dependencies: ["TLVCoding"]
+        )
     ]
 )
+
+// SwiftPM command plugins are only supported by Swift version 5.6 and later.
+#if swift(>=5.6)
+let buildDocs = ProcessInfo.processInfo.environment["BUILDING_FOR_DOCUMENTATION_GENERATION"] != nil
+if buildDocs {
+    package.dependencies += [
+        .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.0.0"),
+    ]
+}
+#endif
