Merge pull request #294 from stencilproject/feature/drop-swift-4

Drop Swift 4 support

.travis.yml

@@ -1,25 +1,13 @@
 matrix:
   include:
     - os: osx
-      osx_image: xcode9.2
-      env: SWIFT_VERSION=4.0.3
-    - os: osx
-      osx_image: xcode9.4
-      env: SWIFT_VERSION=4.1
-    - os: osx
-      osx_image: xcode10
+      osx_image: xcode11.4
       env: SWIFT_VERSION=4.2
     - os: osx
-      osx_image: xcode10.2
+      osx_image: xcode11.4
       env: SWIFT_VERSION=5.0
-    - os: linux
-      env: SWIFT_VERSION=4.0.3
-    - os: linux
-      env: SWIFT_VERSION=4.1
     - os: linux
       env: SWIFT_VERSION=4.2
-    - os: linux
-      env: SWIFT_VERSION=4.2.3
     - os: linux
       env: SWIFT_VERSION=5.0
 language: generic

CHANGELOG.md

@@ -4,7 +4,9 @@
 
 ### Breaking
 
-_None_
+- Drop support for Swift < 4.2. For Swift 4 support, you should use Stencil 0.13.1.  
+  [David Jennes](https://github.com/djbe)
+  [#294](https://github.com/stencilproject/Stencil/pull/294)
 
 ### Enhancements
 
@@ -22,7 +24,6 @@ _None_
 - Fixed using parenthesis in boolean expressions, they now can be used without spaces around them.  
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#254](https://github.com/stencilproject/Stencil/pull/254)
-
 - Throw syntax error on empty variable tags (`{{ }}`) instead `fatalError`.  
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#263](https://github.com/stencilproject/Stencil/pull/263)

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:4.0
+// swift-tools-version:4.2
 import PackageDescription
 
 let package = Package(
@@ -18,5 +18,6 @@ let package = Package(
       "Stencil",
       "Spectre"
     ])
-  ]
+  ],
+  swiftLanguageVersions: [.v4_2]
 )

Package@swift-5.swift

@@ -19,5 +19,5 @@ let package = Package(
       "Spectre"
     ])
   ],
-  swiftLanguageVersions: [.v4, .v4_2, .v5]
+  swiftLanguageVersions: [.v4_2, .v5]
 )

Sources/_SwiftSupport.swift

@@ -1,42 +1,5 @@
 import Foundation
 
-#if !swift(>=4.1)
-  public extension Sequence {
-    func compactMap<ElementOfResult>(_ transform: (Element) throws -> ElementOfResult?) rethrows -> [ElementOfResult] {
-      return try flatMap(transform)
-    }
-  }
-#endif
-
-#if !swift(>=4.1)
-  public extension Collection {
-    func index(_ index: Self.Index, offsetBy offset: Int) -> Self.Index {
-        let indexDistance = Self.IndexDistance(offset)
-        return self.index(index, offsetBy: indexDistance)
-    }
-  }
-#endif
-
-#if !swift(>=4.1)
-public extension TemplateSyntaxError {
-  public static func == (lhs: TemplateSyntaxError, rhs: TemplateSyntaxError) -> Bool {
-    return lhs.reason == rhs.reason &&
-      lhs.description == rhs.description &&
-      lhs.token == rhs.token &&
-      lhs.stackTrace == rhs.stackTrace &&
-      lhs.templateName == rhs.templateName
-  }
-}
-#endif
-
-#if !swift(>=4.1)
-public extension Variable {
-  public static func == (lhs: Variable, rhs: Variable) -> Bool {
-    return lhs.variable == rhs.variable
-  }
-}
-#endif
-
 #if !swift(>=4.2)
 extension ArraySlice where Element: Equatable {
     func firstIndex(of element: Element) -> Int? {

Stencil.podspec.json

@@ -23,12 +23,12 @@
     "osx": "10.9",
     "tvos": "9.0"
   },
-  "cocoapods_version": ">= 1.4.0",
-  "swift_version": "5.0",
+  "cocoapods_version": ">= 1.7.0",
+  "swift_versions": ["4.2", "5.0"],
   "requires_arc": true,
   "dependencies": {
     "PathKit": [
-      "~> 0.9.0"
+      "~> 1.0.0"
     ]
   }
 }