add xcodeVersion option

Sources/XcodeGenKit/PBXProjGenerator.swift

@@ -8,7 +8,6 @@ import ProjectSpec
 public class PBXProjGenerator {
 
     let spec: ProjectSpec
-    let currentXcodeVersion: String
 
     let proj: PBXProj
     let sourceGenerator: SourceGenerator
@@ -27,8 +26,7 @@ public class PBXProjGenerator {
         return spec.options.carthageBuildPath ?? "Carthage/Build"
     }
 
-    public init(spec: ProjectSpec, currentXcodeVersion: String) {
-        self.currentXcodeVersion = currentXcodeVersion
+    public init(spec: ProjectSpec) {
         self.spec = spec
         proj = PBXProj(objectVersion: 46, rootObject: referenceGenerator.generate(PBXProject.self, spec.name))
         sourceGenerator = SourceGenerator(spec: spec, referenceGenerator: referenceGenerator) { _ in }
@@ -111,7 +109,7 @@ public class PBXProjGenerator {
 
         sortGroups(group: mainGroup)
 
-        let projectAttributes: [String: Any] = ["LastUpgradeCheck": currentXcodeVersion].merged(spec.attributes)
+        let projectAttributes: [String: Any] = ["LastUpgradeCheck": spec.xcodeVersion].merged(spec.attributes)
         let root = PBXProject(name: spec.name,
                               reference: proj.rootObject,
                               buildConfigurationList: buildConfigList.reference,

Sources/XcodeGenKit/ProjectGenerator.swift

@@ -8,7 +8,6 @@ import ProjectSpec
 public class ProjectGenerator {
 
     let spec: ProjectSpec
-    let currentXcodeVersion = "0900"
 
     public init(spec: ProjectSpec) {
         self.spec = spec
@@ -24,7 +23,7 @@ public class ProjectGenerator {
 
     public func generateProject() throws -> XcodeProj {
         try spec.validate()
-        let pbxProjGenerator = PBXProjGenerator(spec: spec, currentXcodeVersion: currentXcodeVersion)
+        let pbxProjGenerator = PBXProjGenerator(spec: spec)
         let pbxProject = try pbxProjGenerator.generate()
         let workspace = try generateWorkspace()
         let sharedData = try generateSharedData(pbxProject: pbxProject)
@@ -87,7 +86,7 @@ public class ProjectGenerator {
         let archiveAction = XCScheme.ArchiveAction(buildConfiguration: scheme.archive?.config ?? defaultReleaseConfig.name, revealArchiveInOrganizer: true)
 
         return XCScheme(name: scheme.name,
-                        lastUpgradeVersion: currentXcodeVersion,
+                        lastUpgradeVersion: spec.xcodeVersion,
                         version: "1.3",
                         buildAction: buildAction,
                         testAction: testAction,

Sources/XcodeGenKit/Version.swift

@@ -0,0 +1,42 @@
+import Foundation
+import ProjectSpec
+
+extension ProjectSpec {
+
+    var xcodeVersion: String {
+        return XCodeVersion.parse(options.xcodeVersion ?? "9.0")
+    }
+}
+
+public struct XCodeVersion {
+
+    public static func parse(_ version: String) -> String {
+        if version.contains(".") {
+            let parts = version.split(separator: ".").map(String.init)
+            var string = ""
+            let major = parts[0]
+            if major.count == 1 {
+                string = "0\(major)"
+            } else {
+                string = major
+            }
+
+            let minor = parts[1]
+            string += minor
+
+            if parts.count > 2 {
+                let patch = parts[2]
+                string += patch
+            } else {
+                string += "0"
+            }
+            return string
+        } else if version.count == 2 {
+            return "\(version)00"
+        } else if version.count == 1 {
+            return "0\(version)00"
+        } else {
+            return version
+        }
+    }
+}