introduce SkylarkNode.bool() addition to produce

Author: woshimaliang

IntegrationTests/GoldMaster/ObjcParentWithSwiftSubspecs.podspec.json.goldmaster

@@ -12,6 +12,9 @@ public indirect enum SkylarkNode {
     /// A integer in Skylark.
     case int(Int)
 
+    /// A Boolean in Skylark.
+    case bool(Bool)
+
     /// A string in Skylark.
     /// @note The string value is enclosed within ""
     case string(String)
@@ -123,6 +126,8 @@ public struct SkylarkCompiler {
         switch node {
         case let .int(value):
             return "\(value)"
+        case let .bool(value):
+            return value ? "True" : "False"
         case let .string(value):
             return "\"\(value)\""
         case let .multiLineString(value):

Sources/PodToBUILD/Skylark.swift

@@ -255,7 +255,7 @@ public struct SwiftLibrary: BazelTarget {
                 .named(name: "copts", value: coptsSkylark),
                 .named(name: "swiftc_inputs", value: swiftcInputs.toSkylark()),
                 .named(name: "generated_header_name", value: (externalName + "-Swift.h").toSkylark()),
-                .named(name: "generates_header", value: SkylarkNode.int(1)),
+                .named(name: "generates_header", value: SkylarkNode.bool(true)),
                 .named(name: "features", value: ["swift.no_generated_module_map"].toSkylark()),
                 .named(name: "visibility", value: ["//visibility:public"].toSkylark()),
             ]