Merge branch 'develop' into corestore4_develop

# Conflicts:
#	CoreStore.podspec
#	Sources/CoreStoreImportableAttributeType.swift
#	Sources/CoreStoreQueryableAttributeType.swift
#	Sources/Info.plist
#	Sources/NSManagedObjectModel+Setup.swift

Sources/XcodeDataModelSchema.swift

@@ -0,0 +1,122 @@
+//
+//  XcodeDataModelSchema.swift
+//  CoreStore
+//
+//  Copyright © 2017 John Rommel Estropia
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in all
+//  copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+//  SOFTWARE.
+//
+
+import CoreData
+import Foundation
+
+
+// MARK: - XcodeDataModelSchema
+
+/**
+ The `XcodeDataModelSchema` describes a model version declared in a single *.xcdatamodeld file.
+ ```
+ CoreStore.defaultStack = DataStack(
+     XcodeDataModelSchema(modelName: "MyAppV1", bundle: .main)
+ )
+ ```
+ */
+public final class XcodeDataModelSchema: DynamicSchema {
+    
+    /**
+     Initializes an `XcodeDataModelSchema` from an *.xcdatamodeld version name and its containing `Bundle`.
+     ```
+     CoreStore.defaultStack = DataStack(
+         XcodeDataModelSchema(modelName: "MyAppV1", bundle: .main)
+     )
+     ```
+     - parameter modelName: the model version, typically the file name of an *.xcdatamodeld file (without the file extension)
+     - parameter bundle: the `Bundle` that contains the .xcdatamodeld's "momd" file. If not specified, the `Bundle.main` will be searched.
+     */
+    public convenience init(modelName: ModelVersion, bundle: Bundle = Bundle.main) {
+        
+        guard let modelFilePath = bundle.path(forResource: modelName, ofType: "momd") else {
+            
+            // For users migrating from very old Xcode versions: Old xcdatamodel files are not contained inside xcdatamodeld (with a "d"), and will thus fail this check. If that was the case, create a new xcdatamodeld file and copy all contents into the new model.
+            let foundModels = bundle
+                .paths(forResourcesOfType: "momd", inDirectory: nil)
+                .map({ ($0 as NSString).lastPathComponent })
+            CoreStore.abort("Could not find \"\(modelName).momd\" from the bundle \"\(bundle.bundleIdentifier ?? "<nil>")\". Other model files in bundle: \(foundModels.coreStoreDumpString)")
+        }
+        
+        let modelFileURL = URL(fileURLWithPath: modelFilePath)
+        let fileURL = modelFileURL.appendingPathComponent("\(modelName).mom", isDirectory: false)
+        self.init(modelName: modelName, modelVersionFileURL: fileURL)
+    }
+    
+    /**
+     Initializes an `XcodeDataModelSchema` from an *.xcdatamodeld file URL.
+     ```
+     CoreStore.defaultStack = DataStack(
+         XcodeDataModelSchema(modelName: "MyAppV1", modelVersionFileURL: fileURL)
+     )
+     ```
+     - parameter modelName: the model version, typically the file name of an *.xcdatamodeld file (without the file extension)
+     - parameter modelVersionFileURL: the file URL that points to the .xcdatamodeld's "momd" file.
+     */
+    public required init(modelName: ModelVersion, modelVersionFileURL: URL) {
+        
+        CoreStore.assert(
+            NSManagedObjectModel(contentsOf: modelVersionFileURL) != nil,
+            "Could not find the \"\(modelName).mom\" version file for the model at URL \"\(modelVersionFileURL)\"."
+        )
+        
+        self.modelVersion = modelName
+        self.modelVersionFileURL = modelVersionFileURL
+    }
+    
+    
+    // MARK: DynamicSchema
+    
+    public let modelVersion: ModelVersion
+    
+    public func rawModel() -> NSManagedObjectModel {
+    
+        if let cachedRawModel = self.cachedRawModel {
+            
+            return cachedRawModel
+        }
+        if let rawModel = NSManagedObjectModel(contentsOf: self.modelVersionFileURL) {
+            
+            self.cachedRawModel = rawModel
+            return rawModel
+        }
+        CoreStore.abort("Could not create an \(cs_typeName(NSManagedObjectModel.self)) from the model at URL \"\(self.modelVersionFileURL)\".")
+    }
+    
+    
+    // MARK: Internal
+    
+    internal let modelVersionFileURL: URL
+    
+    private lazy var rootModelFileURL: URL = cs_lazy { [unowned self] in
+     
+        return self.modelVersionFileURL.deletingLastPathComponent()
+    }
+    
+    
+    // MARK: Private
+    
+    private weak var cachedRawModel: NSManagedObjectModel?
+}