Switch some let's to var's. (#189)

* Switch some let's to var's.

* add xcodegen as a dependency

Author: mbrandonw

.swift-version

@@ -1 +1 @@
-4.2
+4.2.1

Makefile

@@ -1,5 +1,5 @@
 xcodeproj:
-	xcodegen && xed .
+	swift run xcodegen
 
 test-linux:
 	docker build --tag snapshot-testing . \

Package.resolved

@@ -10,6 +10,7 @@ let package = Package(
       targets: ["SnapshotTesting"]),
   ],
   dependencies: [
+    .package(url: "https://github.com/yonaskolb/XcodeGen.git", from: "2.2.0"),
   ],
   targets: [
     .target(

Package.swift

@@ -14,7 +14,7 @@
             buildForAnalyzing = "YES">
             <BuildableReference
                BuildableIdentifier = "primary"
-               BlueprintIdentifier = "NT_E1FAA066576312BD4B5DB23882D1278B"
+               BlueprintIdentifier = "64F17F6842573B100D61132C44E859BF"
                BuildableName = "SnapshotTesting.framework"
                BlueprintName = "SnapshotTesting_iOS"
                ReferencedContainer = "container:SnapshotTesting.xcodeproj">
@@ -32,7 +32,7 @@
             skipped = "NO">
             <BuildableReference
                BuildableIdentifier = "primary"
-               BlueprintIdentifier = "NT_3F877242DE1996BA0322ABCB069FB3D9"
+               BlueprintIdentifier = "6C1340F5ED556C5C9B3AE6579E6A859C"
                BuildableName = "SnapshotTestingTests.xctest"
                BlueprintName = "SnapshotTestingTests_iOS"
                ReferencedContainer = "container:SnapshotTesting.xcodeproj">
@@ -42,7 +42,7 @@
       <MacroExpansion>
          <BuildableReference
             BuildableIdentifier = "primary"
-            BlueprintIdentifier = "NT_E1FAA066576312BD4B5DB23882D1278B"
+            BlueprintIdentifier = "64F17F6842573B100D61132C44E859BF"
             BuildableName = "SnapshotTesting.framework"
             BlueprintName = "SnapshotTesting_iOS"
             ReferencedContainer = "container:SnapshotTesting.xcodeproj">
@@ -73,7 +73,7 @@
       <MacroExpansion>
          <BuildableReference
             BuildableIdentifier = "primary"
-            BlueprintIdentifier = "NT_E1FAA066576312BD4B5DB23882D1278B"
+            BlueprintIdentifier = "64F17F6842573B100D61132C44E859BF"
             BuildableName = "SnapshotTesting.framework"
             BlueprintName = "SnapshotTesting_iOS"
             ReferencedContainer = "container:SnapshotTesting.xcodeproj">
@@ -101,7 +101,7 @@
          runnableDebuggingMode = "0">
          <BuildableReference
             BuildableIdentifier = "primary"
-            BlueprintIdentifier = "NT_E1FAA066576312BD4B5DB23882D1278B"
+            BlueprintIdentifier = "64F17F6842573B100D61132C44E859BF"
             BuildableName = "SnapshotTesting.framework"
             BlueprintName = "SnapshotTesting_iOS"
             ReferencedContainer = "container:SnapshotTesting.xcodeproj">

SnapshotTesting.xcodeproj/project.pbxproj

@@ -14,7 +14,7 @@
             buildForAnalyzing = "YES">
             <BuildableReference
                BuildableIdentifier = "primary"
-               BlueprintIdentifier = "NT_EFB00F39C5351E0984C1B0E093A05904"
+               BlueprintIdentifier = "0E84A93796E47328AAE7C80F4B484472"
                BuildableName = "SnapshotTesting.framework"
                BlueprintName = "SnapshotTesting_macOS"
                ReferencedContainer = "container:SnapshotTesting.xcodeproj">
@@ -32,7 +32,7 @@
             skipped = "NO">
             <BuildableReference
                BuildableIdentifier = "primary"
-               BlueprintIdentifier = "NT_0640DAF50FBD76E0169F38B530ABB4E3"
+               BlueprintIdentifier = "4D351C54668E3B5721A83752A850D9DE"
                BuildableName = "SnapshotTestingTests.xctest"
                BlueprintName = "SnapshotTestingTests_macOS"
                ReferencedContainer = "container:SnapshotTesting.xcodeproj">
@@ -42,7 +42,7 @@
       <MacroExpansion>
          <BuildableReference
             BuildableIdentifier = "primary"
-            BlueprintIdentifier = "NT_EFB00F39C5351E0984C1B0E093A05904"
+            BlueprintIdentifier = "0E84A93796E47328AAE7C80F4B484472"
             BuildableName = "SnapshotTesting.framework"
             BlueprintName = "SnapshotTesting_macOS"
             ReferencedContainer = "container:SnapshotTesting.xcodeproj">
@@ -73,7 +73,7 @@
       <MacroExpansion>
          <BuildableReference
             BuildableIdentifier = "primary"
-            BlueprintIdentifier = "NT_EFB00F39C5351E0984C1B0E093A05904"
+            BlueprintIdentifier = "0E84A93796E47328AAE7C80F4B484472"
             BuildableName = "SnapshotTesting.framework"
             BlueprintName = "SnapshotTesting_macOS"
             ReferencedContainer = "container:SnapshotTesting.xcodeproj">
@@ -101,7 +101,7 @@
          runnableDebuggingMode = "0">
          <BuildableReference
             BuildableIdentifier = "primary"
-            BlueprintIdentifier = "NT_EFB00F39C5351E0984C1B0E093A05904"
+            BlueprintIdentifier = "0E84A93796E47328AAE7C80F4B484472"
             BuildableName = "SnapshotTesting.framework"
             BlueprintName = "SnapshotTesting_macOS"
             ReferencedContainer = "container:SnapshotTesting.xcodeproj">

SnapshotTesting.xcodeproj/xcshareddata/xcschemes/SnapshotTesting_iOS.xcscheme

@@ -14,7 +14,7 @@
             buildForAnalyzing = "YES">
             <BuildableReference
                BuildableIdentifier = "primary"
-               BlueprintIdentifier = "NT_693A6A5632B0A32E6E52A4DDD822E69E"
+               BlueprintIdentifier = "CADC8264FEF9AEA34FCCD430697A1D65"
                BuildableName = "SnapshotTesting.framework"
                BlueprintName = "SnapshotTesting_tvOS"
                ReferencedContainer = "container:SnapshotTesting.xcodeproj">
@@ -32,7 +32,7 @@
             skipped = "NO">
             <BuildableReference
                BuildableIdentifier = "primary"
-               BlueprintIdentifier = "NT_F155FA762896640C78950B0027F9917D"
+               BlueprintIdentifier = "A6C32CCDA022766883A434A0E026CFA2"
                BuildableName = "SnapshotTestingTests.xctest"
                BlueprintName = "SnapshotTestingTests_tvOS"
                ReferencedContainer = "container:SnapshotTesting.xcodeproj">
@@ -42,7 +42,7 @@
       <MacroExpansion>
          <BuildableReference
             BuildableIdentifier = "primary"
-            BlueprintIdentifier = "NT_693A6A5632B0A32E6E52A4DDD822E69E"
+            BlueprintIdentifier = "CADC8264FEF9AEA34FCCD430697A1D65"
             BuildableName = "SnapshotTesting.framework"
             BlueprintName = "SnapshotTesting_tvOS"
             ReferencedContainer = "container:SnapshotTesting.xcodeproj">
@@ -73,7 +73,7 @@
       <MacroExpansion>
          <BuildableReference
             BuildableIdentifier = "primary"
-            BlueprintIdentifier = "NT_693A6A5632B0A32E6E52A4DDD822E69E"
+            BlueprintIdentifier = "CADC8264FEF9AEA34FCCD430697A1D65"
             BuildableName = "SnapshotTesting.framework"
             BlueprintName = "SnapshotTesting_tvOS"
             ReferencedContainer = "container:SnapshotTesting.xcodeproj">
@@ -101,7 +101,7 @@
          runnableDebuggingMode = "0">
          <BuildableReference
             BuildableIdentifier = "primary"
-            BlueprintIdentifier = "NT_693A6A5632B0A32E6E52A4DDD822E69E"
+            BlueprintIdentifier = "CADC8264FEF9AEA34FCCD430697A1D65"
             BuildableName = "SnapshotTesting.framework"
             BlueprintName = "SnapshotTesting_tvOS"
             ReferencedContainer = "container:SnapshotTesting.xcodeproj">

SnapshotTesting.xcodeproj/xcshareddata/xcschemes/SnapshotTesting_macOS.xcscheme

@@ -4,13 +4,13 @@ import XCTest
 /// The ability to compare `Value`s and convert them to and from `Data`.
 public struct Diffing<Value> {
   /// Converts a value _to_ data.
-  public let toData: (Value) -> Data
+  public var toData: (Value) -> Data
 
   /// Produces a value _from_ data.
-  public let fromData: (Data) -> Value
+  public var fromData: (Data) -> Value
 
   /// Compares two values. If the values do not match, returns a failure message and artifacts describing the failure.
-  public let diff: (Value, Value) -> (String, [XCTAttachment])?
+  public var diff: (Value, Value) -> (String, [XCTAttachment])?
 
   /// Creates a new `Diffing` on `Value`.
   ///

SnapshotTesting.xcodeproj/xcshareddata/xcschemes/SnapshotTesting_tvOS.xcscheme

@@ -7,10 +7,10 @@ public struct Snapshotting<Value, Format> {
   public var pathExtension: String?
 
   /// How the snapshot format is diffed and converted to and from data.
-  public let diffing: Diffing<Format>
+  public var diffing: Diffing<Format>
 
   /// How a value is transformed into a diffable snapshot format.
-  public let snapshot: (Value) -> Async<Format>
+  public var snapshot: (Value) -> Async<Format>
 
   /// Creates a snapshot strategy.
   ///