Feature: Add four new SettingsTransformers (#4427)

Sources/ProjectDescription/SettingsTransformers.swift

@@ -97,18 +97,27 @@ extension SettingsDictionary {
         return merging(versionSettings)
     }
 
-    // MARK: - Swift Settings
+    // MARK: - Swift Compiler - Language
 
     /// Sets `"SWIFT_VERSION"` to `version`
     public func swiftVersion(_ version: String) -> SettingsDictionary {
         merging(["SWIFT_VERSION": SettingValue(version)])
     }
 
+    // MARK: - Swift Compiler - Custom Flags
+
     /// Sets `"OTHER_SWIFT_FLAGS"` to `flags`
     public func otherSwiftFlags(_ flags: String...) -> SettingsDictionary {
         merging(["OTHER_SWIFT_FLAGS": SettingValue(flags.joined(separator: " "))])
     }
 
+    /// Sets `"SWIFT_ACTIVE_COMPILATION_CONDITIONS"` to `conditions`
+    public func swiftActiveCompilationConditions(_ conditions: String...) -> SettingsDictionary {
+        merging(["SWIFT_ACTIVE_COMPILATION_CONDITIONS": SettingValue(conditions.joined(separator: " "))])
+    }
+
+    // MARK: - Swift Compiler - Code Generation
+
     /// Sets `"SWIFT_COMPILATION_MODE"` to the available `SwiftCompilationMode` (`"singlefile"` or `"wholemodule"`)
     public func swiftCompilationMode(_ mode: SwiftCompilationMode) -> SettingsDictionary {
         merging(["SWIFT_COMPILATION_MODE": SettingValue(mode)])
@@ -124,6 +133,29 @@ extension SettingsDictionary {
         merging(["SWIFT_OPTIMIZE_OBJECT_LIFETIME": SettingValue(enabled)])
     }
 
+    // MARK: - Swift Compiler - General
+
+    /// Sets `"SWIFT_OBJC_BRIDGING_HEADER"` to `path`
+    public func swiftObjcBridingHeaderPath(_ path: String) -> SettingsDictionary {
+        var settings = self
+        settings["SWIFT_OBJC_BRIDGING_HEADER"] = SettingValue(path)
+        return settings
+    }
+
+    // MARK: - Apple Clang - Custom Compiler Flags
+
+    /// Sets `"OTHER_CFLAGS"` to `flags`
+    public func otherCFlags(_ flags: [String]) -> SettingsDictionary {
+        merging(["OTHER_CFLAGS": .array(flags)])
+    }
+
+    // MARK: - Linking
+
+    /// Sets `"OTHER_LDFLAGS"` to `flags`
+    public func otherLinkerFlags(_ flags: [String]) -> SettingsDictionary {
+        merging(["OTHER_LDFLAGS": .array(flags)])
+    }
+
     // MARK: - Bitcode
 
     /// Sets `"ENABLE_BITCODE"` to `"YES"` or `"NO"`

Tests/ProjectDescriptionTests/SettingsTests.swift

@@ -98,6 +98,10 @@ final class SettingsTests: XCTestCase {
             .otherSwiftFlags("first", "second", "third")
             .bitcodeEnabled(true)
             .debugInformationFormat(.dwarf)
+            .swiftActiveCompilationConditions("FIRST", "SECOND", "THIRD")
+            .swiftObjcBridingHeaderPath("/my/briding/header/path.h")
+            .otherCFlags(["$(inherited)", "-my-c-flag"])
+            .otherLinkerFlags(["$(inherited)", "-my-linker-flag"])
 
         /// Then
         XCTAssertEqual(settings, [
@@ -114,6 +118,10 @@ final class SettingsTests: XCTestCase {
             "OTHER_SWIFT_FLAGS": "first second third",
             "ENABLE_BITCODE": "YES",
             "DEBUG_INFORMATION_FORMAT": "dwarf",
+            "SWIFT_ACTIVE_COMPILATION_CONDITIONS": "FIRST SECOND THIRD",
+            "SWIFT_OBJC_BRIDGING_HEADER": "/my/briding/header/path.h",
+            "OTHER_CFLAGS": ["$(inherited)", "-my-c-flag"],
+            "OTHER_LDFLAGS": ["$(inherited)", "-my-linker-flag"],
         ])
     }
 
@@ -130,6 +138,17 @@ final class SettingsTests: XCTestCase {
         ])
     }
 
+    func test_settingsDictionary_swiftActiveCompilationConditions() {
+        /// Given/When
+        let settings = SettingsDictionary()
+            .swiftActiveCompilationConditions("FIRST", "SECOND", "THIRD")
+
+        /// Then
+        XCTAssertEqual(settings, [
+            "SWIFT_ACTIVE_COMPILATION_CONDITIONS": "FIRST SECOND THIRD",
+        ])
+    }
+
     func test_settingsDictionary_SwiftCompilationMode() {
         /// Given/When
         let settings1 = SettingsDictionary()
@@ -179,6 +198,39 @@ final class SettingsTests: XCTestCase {
         ])
     }
 
+    func test_settingsDictionary_swiftObjcBridingHeaderPath() {
+        /// Given/When
+        let settings = SettingsDictionary()
+            .swiftObjcBridingHeaderPath("/my/briding/header/path.h")
+
+        /// Then
+        XCTAssertEqual(settings, [
+            "SWIFT_OBJC_BRIDGING_HEADER": "/my/briding/header/path.h",
+        ])
+    }
+
+    func test_settingsDictionary_otherCFlags() {
+        /// Given/When
+        let settings = SettingsDictionary()
+            .otherCFlags(["$(inherited)", "-my-c-flag"])
+
+        /// Then
+        XCTAssertEqual(settings, [
+            "OTHER_CFLAGS": ["$(inherited)", "-my-c-flag"],
+        ])
+    }
+
+    func test_settingsDictionary_otherLinkerFlags() {
+        /// Given/When
+        let settings = SettingsDictionary()
+            .otherLinkerFlags(["$(inherited)", "-my-linker-flag"])
+
+        /// Then
+        XCTAssertEqual(settings, [
+            "OTHER_LDFLAGS": ["$(inherited)", "-my-linker-flag"],
+        ])
+    }
+
     func test_settingsDictionary_SwiftOptimizeObjectLifetimes() {
         /// Given/When
         let settings1 = SettingsDictionary()