Release 0.6.0-beta.1

Minor grammatical fixes to README.md

.gitignore

@@ -1,26 +1,3 @@
-# Xcode
-#
-build/
-*.pbxuser
-!default.pbxuser
-*.mode1v3
-!default.mode1v3
-*.mode2v3
-!default.mode2v3
-*.perspectivev3
-!default.perspectivev3
-xcuserdata
-*.xccheckout
-*.moved-aside
-DerivedData
-*.hmap
-*.ipa
-*.xcuserstate
-
-# CocoaPods
-#
-# We recommend against adding the Pods directory to your .gitignore. However
-# you should judge for yourself, the pros and cons are mentioned at:
-# http://guides.cocoapods.org/using/using-cocoapods.html#should-i-ignore-the-pods-directory-in-source-control
-#
-# Pods/
+.conche/
+.build/
+Packages/

.swift-version

@@ -0,0 +1 @@
+DEVELOPMENT-SNAPSHOT-2016-01-25-a

.travis.yml

@@ -0,0 +1,11 @@
+os:
+  - osx
+  - linux
+language: generic
+sudo: required
+dist: trusty
+osx_image: xcode7.2
+install:
+  - eval "$(curl -sL https://gist.githubusercontent.com/kylef/5c0475ff02b7c7671d2a/raw/02090c7ede5a637b76e6df1710e83cd0bbe7dcdf/swiftenv-install.sh)"
+script:
+- make test

ARCHITECTURE.md

@@ -0,0 +1,175 @@
+Stencil Architecture
+====================
+
+This document outlines the architecture of Stencil and how it works internally.
+
+Stencil uses a three-step process for rendering templates. The first step is tokenising the template into an array of Token’s. Afterwards, the array of token’s are transformed into a collection of Node’s. Once we have a collection of Node’s (objects conforming to the `Node` protocol), we then call `render(context)` on each Node instructing it to render itself inside the given context.
+
+## Token
+
+Token is an enum which has four members. These represent a piece of text, a variable, a comment or a template block. They are parsed using the `TokenParser` which takes the template as a string as input and returns an array of Token’s.
+
+### Values
+
+#### Text
+
+A text token represents a string which will be rendered in the template. For example, a text token with the string `Hello World` will be rendered as such in the output.
+
+#### Variable
+
+A variable token represents a variable inside a context. It will be evaluated and rendered in the output. It is created from the template using `{{ string }}`.
+
+#### Comment
+
+The comment token represents a comment inside the source. It is created using `{# This is a comment #}`.
+
+#### Block
+
+A block represents a template tag. It is created using `{% this is a template block %}` inside a template. The template tag in this case would be called `this`. See “Block Token” below for more information.
+
+### Parsing
+
+A template is parsed using the TokenParser into an array of Token’s. For example:
+
+```html+django
+Hello {{ name }}
+```
+
+Would be parsed into two tokens. A token representing the string, `Hello ` and a token representing the variable called `name`. So, in Swift it would be represented as follows:
+
+```swift
+let tokens = [
+  Token.Text("Hello "),
+  Token.Variable("name"),
+]
+```
+
+## Node
+
+Node is a protocol with a single method, to render it inside a context. When rendering a node, it is converted into the output string, or an error if there is a failure. Token’s are converted to Node’s using the `TokenParser` class.
+
+For some Token’s, there is a direct mapping from a Token to a Node. However block node’s do not have a 1:1 mapping.
+
+### Token Parsing
+
+#### Text Token
+
+A text token is converted directly to a `TextNode` which simply returns the text when rendered.
+
+#### Variable Token
+
+Variable Token’s are transformed directly to a `VariableNode`, which will evaluate a variable in the given template when rendered.
+
+#### Comment Token
+
+A comment token is simply omitted, a comment token will be dropped when it is converted to a Node.
+
+#### Block Token
+
+Block token’s are slightly different from the other tokens, there is no direct mapping. A block token is made up of a string representing the token. For example `now` or `for article in articles`. The `TokenParser` will pull out the first word inside the string representation and use that to look-up a parser for the block. So, in this example, the template tag names will be `now` or `for`.
+
+The template tag’s are registered with a block of code which deals with the parsing for the given tag. This allows the parser to parse a set of tokens ahead of the block tone. This is useful for control flow, such as the `for` template tag will want to parse any following tokens up until the `endblock` block token.
+
+For example:
+
+```html+django
+{% for article in articles %}
+  An Article
+{% endfor %}
+```
+
+Or as a set of tokens:
+
+```swift
+let tokens = [
+  Token.Block("for article in articles"),
+  Token.Text("  An Article")
+  Token.Block("endfor")
+]
+```
+
+Will result in a single Node (a `ForNode`) which contains the sub-node containing the text. The `ForNode` class has a property called `forNodes` which contains the text node representing the text token (`  An Article`).
+
+When the `ForNode` is rendered in a context, it will look up the variable `articles` and if it’s an array it will loop over it. Inserting the variable `article` into the context while rendered the `forNodes` for each article.
+
+### Custom Nodes
+
+There are two ways to register custom template tags. A simple way which allows you to map 1:1 a block token to a Node. You can also register a more advanced template tag which has it’s own block of code for handling parsing if you want to parse up until another token such as if you are trying to provide flow-control.
+
+The tags are registered with a `Namespace` passed when rendering your `Template`.
+
+#### Simple Tags
+
+A simple tag is registered with a string for the tag name and a block of code which is evaluated when the block is rendered in a given context.
+
+Here’s an example. Registering a template tag called `custom` which just renders `Hello World` in the rendered template:
+
+```swift
+namespace.registerSimpleTag("custom") { context in
+  return "Hello World"
+}
+```
+
+You would use it as such in a template:
+
+```html+django
+{% custom %}
+```
+
+#### Advanced Tags
+
+If you need more control or functionality than the simple tag’s above, you can use the node based API where you can provide a block of code to deal with parsing. There are a few examples of this in use over at `Node.swift` inside Stencil. There is an implementation of `if` and `for` template tags.
+
+You would register a template tag using the `registerTag` API inside a `Namespace` which accepts a name for the tag and a block of code to handle parsing. The block of code is invoked with the parser and the current token as an argument. This allows you to use the API on `TokenParser` to parse node’s further in the token array.
+
+As an example, we’re going to create a template tag called `debug` which will optionally render nodes from `debug` up until `enddebug`. When rendering the `DebugNode`, it will only render the nodes inside if a variable called `debug` is set to `true` inside the template Context.
+
+```html+django
+{% debug %}
+  Debugging is enabled!
+{% enddebug %}
+```
+
+This will be represented by a `DebugNode` which will have a property containing all of the Node’s inside the `debug`/`enddebug` block. In the above example, this will just be a TextNode containing `  Debugging is enabled!`.
+
+When the `DebugNode` is rendered, it will determine if debug is enabled by introspecting the context and if it is enabled. We will render the nodes, otherwise just return an empty string to hide the debug output.
+
+So, our `DebugNode` would look like as following:
+
+```swift
+class DebugNode : Node {
+  let nodes:[Node]
+
+  init(nodes:[Node]) {
+    self.nodes = nodes
+  }
+
+  func render(context: Context) throws -> String {
+    // Is there a debug variable inside the context?
+    if let debug = context["debug"] as? Bool {
+      // Is debug set to true?
+      if debug {
+        // Let's render the given nodes in the context since debug is enabled.
+        return renderNodes(nodes, context)
+      }
+    }
+
+    // Debug is turned off, so let's not render anything
+    return ""
+  }
+}
+```
+
+We will need to write a parser to parse up until the `enddebug` template block and create a `DebugNode` with the nodes in-between. If there was another error form another Node inside, then we will return that error.
+
+```swift
+namespace.registerTag("debug") { parser, token in
+  // Use the parser to parse every token up until the `enddebug` block.
+  let nodes = try until(["enddebug"]))
+  return DebugNode(nodes)
+}
+```
+
+## Context
+
+A Context is a structure containing any templates you would like to use in a template. It’s somewhat like a dictionary, however you can push and pop to scope variables. So that means that when iterating over a for loop, you can push a new scope into the context to store any variables local to the scope.

Makefile

@@ -0,0 +1,7 @@
+stencil:
+	@echo "Building Stencil"
+	@swift build
+
+test: stencil
+	@echo "Running Tests"
+	@.build/debug/spectre-build

Package.swift

@@ -0,0 +1,11 @@
+import PackageDescription
+
+let package = Package(
+  name: "Stencil",
+  dependencies: [
+    .Package(url: "https://github.com/kylef/PathKit.git", majorVersion: 0, minor: 6),
+  ],
+  testDependencies: [
+    .Package(url: "https://github.com/kylef/spectre-build", majorVersion: 0),
+  ]
+)

README.md

@@ -1,11 +1,12 @@
-Stencil
-=======
+# Stencil
+
+[![Build Status](https://travis-ci.org/kylef/Stencil.svg?branch=master)](https://travis-ci.org/kylef/Stencil)
 
 Stencil is a simple and powerful template language for Swift. It provides a
 syntax similar to Django and Mustache. If you're familiar with these, you will
 feel right at home with Stencil.
 
-### Example
+## Example
 
 ```html+django
 There are {{ articles.count }} articles.
@@ -17,23 +18,29 @@ There are {{ articles.count }} articles.
 
 ```swift
 let context = Context(dictionary: [
-    "articles": [
-        [ "title": "Migrating from OCUnit to XCTest", "author": "Kyle Fuller" ],
-        [ "title": "Memory Management with ARC", "author": "Kyle Fuller" ],
-    ]
+  "articles": [
+    [ "title": "Migrating from OCUnit to XCTest", "author": "Kyle Fuller" ],
+    [ "title": "Memory Management with ARC", "author": "Kyle Fuller" ],
+  ]
 ])
 
-let template = Template(named: "template.stencil")
-let result = template.render(context)
-
-switch result {
-    case .Error(let error):
-        println("There was an error rendering your template (\(error)).")
-    case .Success(let string):
-        println("\(string)")
+do {
+  let template = try Template(named: "template.stencil")
+  let rendered = try template.render(context)
+  print(rendered)
+} catch {
+  print("Failed to render template \(error)")
 }
 ```
 
+## Installation
+
+Installation with CocoaPods is recommended.
+
+```ruby
+pod 'Stencil'
+```
+
 ## Philosophy
 
 Stencil follows the same philosophy of Django:
@@ -66,13 +73,48 @@ following lookup:
 For example, if `people` was an array:
 
 ```html+django
-There are {{ people.count }} people, {{ people.first }} is first person.
-Followed by {{ people.1 }}.
+There are {{ people.count }} people. {{ people.first }} is the first person,
+followed by {{ people.1 }}.
+```
+
+#### Filters
+
+Filters allow you to transform the values of variables. For example, they look like:
+
+```html+django
+{{ variable|uppercase }}
+```
+
+##### Capitalize
+
+The capitalize filter allows you to capitalize a string.
+For example, `stencil` to `Stencil`.
+
+```html+django
+{{ "stencil"|capitalize }}
+```
+
+##### Uppercase
+
+The uppercase filter allows you to transform a string to uppercase.
+For example, `Stencil` to `STENCIL`.
+
+```html+django
+{{ "Stencil"|uppercase }}
+```
+
+##### Lowercase
+
+The uppercase filter allows you to transform a string to lowercase.
+For example, `Stencil` to `stencil`.
+
+```html+django
+{{ "Stencil"|lowercase }}
 ```
 
 ### Tags
 
-Tags are a mechanism to execute a piece of code which can allows you to have
+Tags are a mechanism to execute a piece of code, allowing you to have
 control flow within your template.
 
 ```html+django
@@ -81,7 +123,7 @@ control flow within your template.
 {% endif %}
 ```
 
-A tag can also effect the context and define variables as follows:
+A tag can also affect the context and define variables as follows:
 
 ```html+django
 {% for item in items %}
@@ -89,8 +131,8 @@ A tag can also effect the context and define variables as follows:
 {% endfor %}
 ```
 
-Stencil has a couple of built in tags which are listed below. You can also
-extend Stencil and provide your own tags.
+Stencil has a couple of built-in tags which are listed below. You can also
+extend Stencil by providing your own tags.
 
 #### for
 
@@ -100,7 +142,7 @@ A for loop allows you to iterate over an array found by variable lookup.
 {% for item in items %}
   {{ item }}
 {% empty %}
-  There we're no items.
+  There were no items.
 {% endfor %}
 ```
 
@@ -124,29 +166,72 @@ A for loop allows you to iterate over an array found by variable lookup.
 {% endif %}
 ```
 
+#### include
+
+You can include another template using the `include` tag.
+
+```html+django
+{% include "comment.html" %}
+```
+
+The `include` tag requires a TemplateLoader to be found inside your context with the paths, or bundles used to lookup the template.
+
+```swift
+let context = Context(dictionary: [
+  "loader": TemplateLoader(bundle:[NSBundle.mainBundle()])
+])
+```
+
+### Customisation
+
+You can build your own custom filters and tags and pass them down while
+rendering your template. Any custom filters or tags must be registered
+with a namespace which contains all filters and tags available to the template.
+
+```swift
+let namespace = Namespace()
+// Register your filters and tags with the namespace
+let rendered = try template.render(context, namespace: namespace)
+```
+
+#### Registering custom filters
+
+```swift
+namespace.registerFilter("double") { value in
+  if let value = value as? Int {
+    return value * 2
+  }
+
+  return value
+}
+```
+
 #### Building custom tags
 
 You can build a custom template tag. There are a couple of APIs to allow
 you to write your own custom tags. The following is the simplest form:
 
 ```swift
-template.parser.registerSimpleTag("custom") { context in
-  return .Success("Hello World")
+namespace.registerSimpleTag("custom") { context in
+  return "Hello World"
 }
 ```
 
 When your tag is used via `{% custom %}` it will execute the registered block
 of code allowing you to modify or retrieve a value from the context. Then
-return either a string rendered in your template, or an error.
+return either a string rendered in your template, or throw an error.
 
 If you want to accept arguments or to capture different tokens between two sets
-of template tags. You will need to the `registerTag` API which accepts a
+of template tags. You will need to call the `registerTag` API which accepts a
 closure to handle the parsing. You can find examples of the `now`, `if` and
 `for` tags found inside `Node.swift`.
 
+The architecture of Stencil along with how to build advanced plugins can be
+found in the [architecture](ARCHITECTURE.md) document.
+
 ### Comments
 
-To comment out part of your template you can use the following syntax:
+To comment out part of your template, you can use the following syntax:
 
 ```html+django
 {# My comment is completely hidden #}
@@ -156,4 +241,3 @@ To comment out part of your template you can use the following syntax:
 
 Stencil is licensed under the BSD license. See [LICENSE](LICENSE) for more
 info.
-

Sources/Context.swift

@@ -0,0 +1,55 @@
+/// A container for template variables.
+public class Context {
+  var dictionaries: [[String: Any]]
+  let namespace: Namespace
+
+  /// Initialise a Context with an optional dictionary and optional namespace
+  public init(dictionary: [String: Any]? = nil, namespace: Namespace = Namespace()) {
+    if let dictionary = dictionary {
+      dictionaries = [dictionary]
+    } else {
+      dictionaries = []
+    }
+
+    self.namespace = namespace
+  }
+
+  public subscript(key: String) -> Any? {
+    /// Retrieves a variable's value, starting at the current context and going upwards
+    get {
+      for dictionary in Array(dictionaries.reverse()) {
+        if let value = dictionary[key] {
+          return value
+        }
+      }
+
+      return nil
+    }
+
+    /// Set a variable in the current context, deleting the variable if it's nil
+    set(value) {
+      if let dictionary = dictionaries.popLast() {
+        var mutable_dictionary = dictionary
+        mutable_dictionary[key] = value
+        dictionaries.append(mutable_dictionary)
+      }
+    }
+  }
+
+  /// Push a new level into the Context
+  private func push(dictionary: [String: Any]? = nil) {
+    dictionaries.append(dictionary ?? [:])
+  }
+
+  /// Pop the last level off of the Context
+  private func pop() -> [String: Any]? {
+    return dictionaries.popLast()
+  }
+
+  /// Push a new level onto the context for the duration of the execution of the given closure
+  public func push<Result>(dictionary: [String: Any]? = nil, @noescape closure: (() throws -> Result)) rethrows -> Result {
+    push(dictionary)
+    defer { pop() }
+    return try closure()
+  }
+}

Sources/Filters.swift

@@ -0,0 +1,33 @@
+func toString(value: Any?) -> String? {
+  if let value = value as? String {
+    return value
+  } else if let value = value as? CustomStringConvertible {
+    return value.description
+  }
+
+  return nil
+}
+
+func capitalise(value: Any?) -> Any? {
+  if let value = toString(value) {
+    return value.capitalizedString
+  }
+
+  return value
+}
+
+func uppercase(value: Any?) -> Any? {
+  if let value = toString(value) {
+    return value.uppercaseString
+  }
+
+  return value
+}
+
+func lowercase(value: Any?) -> Any? {
+  if let value = toString(value) {
+    return value.lowercaseString
+  }
+
+  return value
+}

Sources/ForTag.swift

@@ -0,0 +1,62 @@
+public class ForNode : NodeType {
+  let variable:Variable
+  let loopVariable:String
+  let nodes:[NodeType]
+  let emptyNodes: [NodeType]
+
+  public class func parse(parser:TokenParser, token:Token) throws -> NodeType {
+    let components = token.components()
+
+    guard components.count == 4 && components[2] == "in" else {
+      throw TemplateSyntaxError("'for' statements should use the following 'for x in y' `\(token.contents)`.")
+    }
+
+    let loopVariable = components[1]
+    let variable = components[3]
+
+    var emptyNodes = [NodeType]()
+
+    let forNodes = try parser.parse(until(["endfor", "empty"]))
+
+    guard let token = parser.nextToken() else {
+      throw TemplateSyntaxError("`endfor` was not found.")
+    }
+
+    if token.contents == "empty" {
+      emptyNodes = try parser.parse(until(["endfor"]))
+      parser.nextToken()
+    }
+
+    return ForNode(variable: variable, loopVariable: loopVariable, nodes: forNodes, emptyNodes:emptyNodes)
+  }
+
+  public init(variable:String, loopVariable:String, nodes:[NodeType], emptyNodes:[NodeType]) {
+    self.variable = Variable(variable)
+    self.loopVariable = loopVariable
+    self.nodes = nodes
+    self.emptyNodes = emptyNodes
+  }
+
+  public func render(context: Context) throws -> String {
+    let values = try variable.resolve(context)
+
+    if let values = values as? [Any] where values.count > 0 {
+      let count = values.count
+      return try values.enumerate().map { index, item in
+        let forContext: [String: Any] = [
+          "first": index == 0,
+          "last": index == (count - 1),
+          "counter": index + 1,
+        ]
+
+        return try context.push([loopVariable: item, "forloop": forContext]) {
+          try renderNodes(nodes, context)
+        }
+      }.joinWithSeparator("")
+    }
+
+    return try context.push {
+      try renderNodes(emptyNodes, context)
+    }
+  }
+}

Sources/IfTag.swift

@@ -0,0 +1,78 @@
+public class IfNode : NodeType {
+  public let variable:Variable
+  public let trueNodes:[NodeType]
+  public let falseNodes:[NodeType]
+
+  public class func parse(parser:TokenParser, token:Token) throws -> NodeType {
+    let components = token.components()
+    guard components.count == 2 else {
+      throw TemplateSyntaxError("'if' statements should use the following 'if condition' `\(token.contents)`.")
+    }
+    let variable = components[1]
+    var trueNodes = [NodeType]()
+    var falseNodes = [NodeType]()
+
+    trueNodes = try parser.parse(until(["endif", "else"]))
+
+    guard let token = parser.nextToken() else {
+      throw TemplateSyntaxError("`endif` was not found.")
+    }
+
+    if token.contents == "else" {
+      falseNodes = try parser.parse(until(["endif"]))
+      parser.nextToken()
+    }
+
+    return IfNode(variable: variable, trueNodes: trueNodes, falseNodes: falseNodes)
+  }
+
+  public class func parse_ifnot(parser:TokenParser, token:Token) throws -> NodeType {
+    let components = token.components()
+    guard components.count == 2 else {
+      throw TemplateSyntaxError("'ifnot' statements should use the following 'if condition' `\(token.contents)`.")
+    }
+    let variable = components[1]
+    var trueNodes = [NodeType]()
+    var falseNodes = [NodeType]()
+
+    falseNodes = try parser.parse(until(["endif", "else"]))
+
+    guard let token = parser.nextToken() else {
+      throw TemplateSyntaxError("`endif` was not found.")
+    }
+
+    if token.contents == "else" {
+      trueNodes = try parser.parse(until(["endif"]))
+      parser.nextToken()
+    }
+
+    return IfNode(variable: variable, trueNodes: trueNodes, falseNodes: falseNodes)
+  }
+
+  public init(variable:String, trueNodes:[NodeType], falseNodes:[NodeType]) {
+    self.variable = Variable(variable)
+    self.trueNodes = trueNodes
+    self.falseNodes = falseNodes
+  }
+
+  public func render(context: Context) throws -> String {
+    let result = try variable.resolve(context)
+    var truthy = false
+
+    if let result = result as? [Any] {
+      truthy = !result.isEmpty
+    } else if let result = result as? [String:Any] {
+      truthy = !result.isEmpty
+    } else if result != nil {
+      truthy = true
+    }
+
+    return try context.push {
+      if truthy {
+        return try renderNodes(trueNodes, context)
+      } else {
+        return try renderNodes(falseNodes, context)
+      }
+    }
+  }
+}

Sources/Include.swift

@@ -0,0 +1,38 @@
+import PathKit
+
+
+public class IncludeNode : NodeType {
+  public let templateName: Variable
+
+  public class func parse(parser: TokenParser, token: Token) throws -> NodeType {
+    let bits = token.components()
+
+    guard bits.count == 2 else {
+      throw TemplateSyntaxError("'include' tag takes one argument, the template file to be included")
+    }
+
+    return IncludeNode(templateName: Variable(bits[1]))
+  }
+
+  public init(templateName: Variable) {
+    self.templateName = templateName
+  }
+
+  public func render(context: Context) throws -> String {
+    guard let loader = context["loader"] as? TemplateLoader else {
+      throw TemplateSyntaxError("Template loader not in context")
+    }
+
+    guard let templateName = try self.templateName.resolve(context) as? String else {
+      throw TemplateSyntaxError("'\(self.templateName)' could not be resolved as a string")
+    }
+
+    guard let template = loader.loadTemplate(templateName) else {
+      let paths = loader.paths.map { $0.description }.joinWithSeparator(", ")
+      throw TemplateSyntaxError("'\(templateName)' template not found in \(paths)")
+    }
+
+    return try template.render(context)
+  }
+}
+

Sources/Inheritence.swift

@@ -0,0 +1,113 @@
+class BlockContext {
+  class var contextKey: String { return "block_context" }
+
+  var blocks: [String:BlockNode]
+
+  init(blocks: [String:BlockNode]) {
+    self.blocks = blocks
+  }
+
+  func pop(blockName: String) -> BlockNode? {
+    return blocks.removeValueForKey(blockName)
+  }
+}
+
+
+extension CollectionType {
+  func any(closure: Generator.Element -> Bool) -> Generator.Element? {
+    for element in self {
+      if closure(element) {
+        return element
+      }
+    }
+
+    return nil
+  }
+}
+
+
+class ExtendsNode : NodeType {
+  let templateName: Variable
+  let blocks: [String:BlockNode]
+
+  class func parse(parser: TokenParser, token: Token) throws -> NodeType {
+    let bits = token.components()
+
+    guard bits.count == 2 else {
+      throw TemplateSyntaxError("'extends' takes one argument, the template file to be extended")
+    }
+
+    let parsedNodes = try parser.parse()
+    guard (parsedNodes.any { $0 is ExtendsNode }) == nil else {
+      throw TemplateSyntaxError("'extends' cannot appear more than once in the same template")
+    }
+
+    let blockNodes = parsedNodes.filter { node in node is BlockNode }
+
+    let nodes = blockNodes.reduce([String:BlockNode]()) { (accumulator, node:NodeType) -> [String:BlockNode] in
+      let node = (node as! BlockNode)
+      var dict = accumulator
+      dict[node.name] = node
+      return dict
+    }
+
+    return ExtendsNode(templateName: Variable(bits[1]), blocks: nodes)
+  }
+
+  init(templateName: Variable, blocks: [String: BlockNode]) {
+    self.templateName = templateName
+    self.blocks = blocks
+  }
+
+  func render(context: Context) throws -> String {
+    guard let loader = context["loader"] as? TemplateLoader else {
+      throw TemplateSyntaxError("Template loader not in context")
+    }
+
+    guard let templateName = try self.templateName.resolve(context) as? String else {
+      throw TemplateSyntaxError("'\(self.templateName)' could not be resolved as a string")
+    }
+
+    guard let template = loader.loadTemplate(templateName) else {
+      let paths:String = loader.paths.map { $0.description }.joinWithSeparator(", ")
+      throw TemplateSyntaxError("'\(templateName)' template not found in \(paths)")
+    }
+
+    let blockContext = BlockContext(blocks: blocks)
+    return try context.push([BlockContext.contextKey: blockContext]) {
+      return try template.render(context)
+    }
+  }
+}
+
+
+class BlockNode : NodeType {
+  let name: String
+  let nodes: [NodeType]
+
+  class func parse(parser: TokenParser, token: Token) throws -> NodeType {
+    let bits = token.components()
+
+    guard bits.count == 2 else {
+      throw TemplateSyntaxError("'block' tag takes one argument, the template file to be included")
+    }
+
+    let blockName = bits[1]
+    let nodes = try parser.parse(until(["endblock"]))
+    parser.nextToken()
+    return BlockNode(name:blockName, nodes:nodes)
+  }
+
+  init(name: String, nodes: [NodeType]) {
+    self.name = name
+    self.nodes = nodes
+  }
+
+  func render(context: Context) throws -> String {
+    if let blockContext = context[BlockContext.contextKey] as? BlockContext, node = blockContext.pop(name) {
+      return try node.render(context)
+    }
+
+    return try renderNodes(nodes, context)
+  }
+}

Sources/Lexer.swift

@@ -0,0 +1,147 @@
+public struct Lexer {
+  public let templateString: String
+
+  public init(templateString: String) {
+    self.templateString = templateString
+  }
+
+  func createToken(string:String) -> Token {
+    func strip() -> String {
+      return string[string.startIndex.successor().successor()..<string.endIndex.predecessor().predecessor()].trim(" ")
+    }
+
+    if string.hasPrefix("{{") {
+      return Token.Variable(value: strip())
+    } else if string.hasPrefix("{%") {
+      return Token.Block(value: strip())
+    } else if string.hasPrefix("{#") {
+      return Token.Comment(value: strip())
+    }
+
+    return Token.Text(value: string)
+  }
+
+  /// Returns an array of tokens from a given template string.
+  public func tokenize() -> [Token] {
+    var tokens: [Token] = []
+
+    let scanner = Scanner(templateString)
+
+    let map = [
+      "{{": "}}",
+      "{%": "%}",
+      "{#": "#}",
+    ]
+
+    while !scanner.isEmpty {
+      if let text = scanner.scan(until: ["{{", "{%", "{#"]) {
+        if !text.1.isEmpty {
+          tokens.append(createToken(text.1))
+        }
+
+        let end = map[text.0]!
+        let result = scanner.scan(until: end, returnUntil: true)
+        tokens.append(createToken(result))
+      } else {
+        tokens.append(createToken(scanner.content))
+        scanner.content = ""
+      }
+    }
+
+    return tokens
+  }
+}
+
+
+class Scanner {
+  var content: String
+
+  init(_ content: String) {
+    self.content = content
+  }
+
+  var isEmpty: Bool {
+    return content.isEmpty
+  }
+
+  func scan(until until: String, returnUntil: Bool = false) -> String {
+    if until.isEmpty {
+      return ""
+    }
+
+    var index = content.startIndex
+    while index != content.endIndex {
+      let substring = content[index..<content.endIndex]
+      if substring.hasPrefix(until) {
+        let result = content[content.startIndex..<index]
+        content = substring
+
+        if returnUntil {
+          content = content[until.endIndex..<content.endIndex]
+          return result + until
+        }
+
+        return result
+      }
+
+      index = index.successor()
+    }
+
+    return ""
+  }
+
+  func scan(until until: [String]) -> (String, String)? {
+    if until.isEmpty {
+      return nil
+    }
+
+    var index = content.startIndex
+    while index != content.endIndex {
+      let substring = content[index..<content.endIndex]
+      for string in until {
+        if substring.hasPrefix(string) {
+          let result = content[content.startIndex..<index]
+          content = substring
+          return (string, result)
+        }
+      }
+
+      index = index.successor()
+    }
+
+    return nil
+  }
+}
+
+
+extension String {
+  func findFirstNot(character: Character) -> String.Index? {
+    var index = startIndex
+    while index != endIndex {
+      if character != self[index] {
+        return index
+      }
+      index = index.successor()
+    }
+
+    return nil
+  }
+
+  func findLastNot(character: Character) -> String.Index? {
+    var index = endIndex.predecessor()
+    while index != startIndex {
+      if character != self[index] {
+        return index.successor()
+      }
+      index = index.predecessor()
+    }
+
+    return nil
+  }
+
+  func trim(character: Character) -> String {
+    let first = findFirstNot(character) ?? startIndex
+    let last = findLastNot(character) ?? endIndex
+    return self[first..<last]
+  }
+}

Sources/Namespace.swift

@@ -0,0 +1,46 @@
+public class Namespace {
+  public typealias TagParser = (TokenParser, Token) throws -> NodeType
+
+  var tags = [String: TagParser]()
+  var filters = [String: Filter]()
+
+  public init() {
+    registerDefaultTags()
+    registerDefaultFilters()
+  }
+
+  private func registerDefaultTags() {
+    registerTag("for", parser: ForNode.parse)
+    registerTag("if", parser: IfNode.parse)
+    registerTag("ifnot", parser: IfNode.parse_ifnot)
+#if !os(Linux)
+    registerTag("now", parser: NowNode.parse)
+#endif
+    registerTag("include", parser: IncludeNode.parse)
+    registerTag("extends", parser: ExtendsNode.parse)
+    registerTag("block", parser: BlockNode.parse)
+  }
+
+  private func registerDefaultFilters() {
+    registerFilter("capitalize", filter: capitalise)
+    registerFilter("uppercase", filter: uppercase)
+    registerFilter("lowercase", filter: lowercase)
+  }
+
+  /// Registers a new template tag
+  public func registerTag(name: String, parser: TagParser) {
+    tags[name] = parser
+  }
+
+  /// Registers a simple template tag with a name and a handler
+  public func registerSimpleTag(name: String, handler: Context throws -> String) {
+    registerTag(name, parser: { parser, token in
+      return SimpleNode(handler: handler)
+    })
+  }
+
+  /// Registers a template filter with the given name
+  public func registerFilter(name: String, filter: Filter) {
+    filters[name] = filter
+  }
+}

Sources/Node.swift

@@ -0,0 +1,84 @@
+import Foundation
+
+
+public struct TemplateSyntaxError : ErrorType, Equatable, CustomStringConvertible {
+  public let description:String
+
+  public init(_ description:String) {
+    self.description = description
+  }
+}
+
+
+public func ==(lhs:TemplateSyntaxError, rhs:TemplateSyntaxError) -> Bool {
+  return lhs.description == rhs.description
+}
+
+
+public protocol NodeType {
+  /// Render the node in the given context
+  func render(context:Context) throws -> String
+}
+
+
+/// Render the collection of nodes in the given context
+public func renderNodes(nodes:[NodeType], _ context:Context) throws -> String {
+  return try nodes.map { try $0.render(context) }.joinWithSeparator("")
+}
+
+public class SimpleNode : NodeType {
+  let handler:Context throws -> String
+
+  public init(handler:Context throws -> String) {
+    self.handler = handler
+  }
+
+  public func render(context: Context) throws -> String {
+    return try handler(context)
+  }
+}
+
+
+public class TextNode : NodeType {
+  public let text:String
+
+  public init(text:String) {
+    self.text = text
+  }
+
+  public func render(context:Context) throws -> String {
+    return self.text
+  }
+}
+
+
+public protocol Resolvable {
+  func resolve(context: Context) throws -> Any?
+}
+
+
+public class VariableNode : NodeType {
+  public let variable: Resolvable
+
+  public init(variable: Resolvable) {
+    self.variable = variable
+  }
+
+  public init(variable: String) {
+    self.variable = Variable(variable)
+  }
+
+  public func render(context: Context) throws -> String {
+    let result = try variable.resolve(context)
+
+    if let result = result as? String {
+      return result
+    } else if let result = result as? CustomStringConvertible {
+      return result.description
+    } else if let result = result as? NSObject {
+      return result.description
+    }
+
+    return ""
+  }
+}

Sources/NowTag.swift

@@ -0,0 +1,43 @@
+#if !os(Linux)
+import Foundation
+
+
+public class NowNode : NodeType {
+  public let format:Variable
+
+  public class func parse(parser:TokenParser, token:Token) throws -> NodeType {
+    var format:Variable?
+
+    let components = token.components()
+    guard components.count <= 2 else {
+      throw TemplateSyntaxError("'now' tags may only have one argument: the format string `\(token.contents)`.")
+    }
+    if components.count == 2 {
+      format = Variable(components[1])
+    }
+
+    return NowNode(format:format)
+  }
+
+  public init(format:Variable?) {
+    self.format = format ?? Variable("\"yyyy-MM-dd 'at' HH:mm\"")
+  }
+
+  public func render(context: Context) throws -> String {
+    let date = NSDate()
+    let format = try self.format.resolve(context)
+    var formatter:NSDateFormatter?
+
+    if let format = format as? NSDateFormatter {
+      formatter = format
+    } else if let format = format as? String {
+      formatter = NSDateFormatter()
+      formatter!.dateFormat = format
+    } else {
+      return ""
+    }
+
+    return formatter!.stringFromDate(date)
+  }
+}
+#endif

Sources/Parser.swift

@@ -0,0 +1,91 @@
+public func until(tags: [String]) -> ((TokenParser, Token) -> Bool) {
+  return { parser, token in
+    if let name = token.components().first {
+      for tag in tags {
+        if name == tag {
+          return true
+        }
+      }
+    }
+
+    return false
+  }
+}
+
+public typealias Filter = Any? throws -> Any?
+
+/// A class for parsing an array of tokens and converts them into a collection of Node's
+public class TokenParser {
+  public typealias TagParser = (TokenParser, Token) throws -> NodeType
+
+  private var tokens: [Token]
+  private let namespace: Namespace
+
+  public init(tokens: [Token], namespace: Namespace) {
+    self.tokens = tokens
+    self.namespace = namespace
+  }
+
+  /// Parse the given tokens into nodes
+  public func parse() throws -> [NodeType] {
+    return try parse(nil)
+  }
+
+  public func parse(parse_until:((parser:TokenParser, token:Token) -> (Bool))?) throws -> [NodeType] {
+    var nodes = [NodeType]()
+
+    while tokens.count > 0 {
+      let token = nextToken()!
+
+      switch token {
+      case .Text(let text):
+        nodes.append(TextNode(text: text))
+      case .Variable:
+        nodes.append(VariableNode(variable: try compileFilter(token.contents)))
+      case .Block:
+        let tag = token.components().first
+
+        if let parse_until = parse_until where parse_until(parser: self, token: token) {
+          prependToken(token)
+          return nodes
+        }
+
+        if let tag = tag {
+          if let parser = namespace.tags[tag] {
+            nodes.append(try parser(self, token))
+          } else {
+            throw TemplateSyntaxError("Unknown template tag '\(tag)'")
+          }
+        }
+      case .Comment:
+        continue
+      }
+    }
+
+    return nodes
+  }
+
+  public func nextToken() -> Token? {
+    if tokens.count > 0 {
+      return tokens.removeAtIndex(0)
+    }
+
+    return nil
+  }
+
+  public func prependToken(token:Token) {
+    tokens.insert(token, atIndex: 0)
+  }
+
+  public func findFilter(name: String) throws -> Filter {
+    if let filter = namespace.filters[name] {
+      return filter
+    }
+
+    throw TemplateSyntaxError("Invalid filter '\(name)'")
+  }
+
+  func compileFilter(token: String) throws -> Resolvable {
+    return try FilterExpression(token: token, parser: self)
+  }
+}

Sources/Template.swift

@@ -0,0 +1,45 @@
+import Foundation
+import PathKit
+
+#if os(Linux)
+let NSFileNoSuchFileError = 4
+#endif
+
+/// A class representing a template
+public class Template {
+  let tokens: [Token]
+
+  /// Create a template with the given name inside the given bundle
+  public convenience init(named:String, inBundle bundle:NSBundle? = nil) throws {
+    let useBundle = bundle ??  NSBundle.mainBundle()
+    guard let url = useBundle.URLForResource(named, withExtension: nil) else {
+      throw NSError(domain: NSCocoaErrorDomain, code: NSFileNoSuchFileError, userInfo: nil)
+    }
+
+    try self.init(URL:url)
+  }
+
+  /// Create a template with a file found at the given URL
+  public convenience init(URL:NSURL) throws {
+    try self.init(path: Path(URL.path!))
+  }
+
+  /// Create a template with a file found at the given path
+  public convenience init(path:Path) throws {
+    self.init(templateString: try path.read())
+  }
+
+  /// Create a template with a template string
+  public init(templateString:String) {
+    let lexer = Lexer(templateString: templateString)
+    tokens = lexer.tokenize()
+  }
+
+  /// Render the given template
+  public func render(context: Context? = nil) throws -> String {
+    let context = context ?? Context()
+    let parser = TokenParser(tokens: tokens, namespace: context.namespace)
+    let nodes = try parser.parse()
+    return try renderNodes(nodes, context)
+  }
+}

Sources/TemplateLoader.swift

@@ -0,0 +1,38 @@
+import Foundation
+import PathKit
+
+
+// A class for loading a template from disk
+public class TemplateLoader {
+  public let paths: [Path]
+
+  public init(paths: [Path]) {
+    self.paths = paths
+  }
+
+  public init(bundle: [NSBundle]) {
+    self.paths = bundle.map {
+      return Path($0.bundlePath)
+    }
+  }
+
+  public func loadTemplate(templateName: String) -> Template? {
+    return loadTemplate([templateName])
+  }
+
+  public func loadTemplate(templateNames: [String]) -> Template? {
+    for path in paths {
+      for templateName in templateNames {
+        let templatePath = path + Path(templateName)
+
+        if templatePath.exists {
+          if let template = try? Template(path: templatePath) {
+            return template
+          }
+        }
+      }
+    }
+
+    return nil
+  }
+}

Sources/Tokenizer.swift

@@ -0,0 +1,93 @@
+import Foundation
+
+
+/// Split a string by spaces leaving quoted phrases together
+func smartSplit(value: String) -> [String] {
+  var word = ""
+  var separator: Character = " "
+  var components: [String] = []
+
+  for character in value.characters {
+    if character == separator {
+      if separator != " " {
+        word.append(separator)
+      }
+
+      if !word.isEmpty {
+        components.append(word)
+        word = ""
+      }
+
+      separator = " "
+    } else {
+      if separator == " " && (character == "'" || character == "\"") {
+        separator = character
+      }
+      word.append(character)
+    }
+  }
+
+  if !word.isEmpty {
+    components.append(word)
+  }
+
+  return components
+}
+
+
+public enum Token : Equatable {
+  /// A token representing a piece of text.
+  case Text(value: String)
+
+  /// A token representing a variable.
+  case Variable(value: String)
+
+  /// A token representing a comment.
+  case Comment(value: String)
+
+  /// A token representing a template block.
+  case Block(value: String)
+
+  /// Returns the underlying value as an array seperated by spaces
+  public func components() -> [String] {
+    switch self {
+    case .Block(let value):
+      return smartSplit(value)
+    case .Variable(let value):
+      return smartSplit(value)
+    case .Text(let value):
+      return smartSplit(value)
+    case .Comment(let value):
+      return smartSplit(value)
+    }
+  }
+
+  public var contents: String {
+    switch self {
+    case .Block(let value):
+      return value
+    case .Variable(let value):
+      return value
+    case .Text(let value):
+      return value
+    case .Comment(let value):
+      return value
+    }
+  }
+}
+
+
+public func == (lhs: Token, rhs: Token) -> Bool {
+  switch (lhs, rhs) {
+  case (.Text(let lhsValue), .Text(let rhsValue)):
+    return lhsValue == rhsValue
+  case (.Variable(let lhsValue), .Variable(let rhsValue)):
+    return lhsValue == rhsValue
+  case (.Block(let lhsValue), .Block(let rhsValue)):
+    return lhsValue == rhsValue
+  case (.Comment(let lhsValue), .Comment(let rhsValue)):
+    return lhsValue == rhsValue
+  default:
+    return false
+  }
+}

Sources/Variable.swift

@@ -0,0 +1,133 @@
+import Foundation
+
+
+class FilterExpression : Resolvable {
+  let filters: [Filter]
+  let variable: Variable
+
+  init(token: String, parser: TokenParser) throws {
+    let bits = token.characters.split("|").map({ String($0).trim(" ") })
+    if bits.isEmpty {
+      filters = []
+      variable = Variable("")
+      throw TemplateSyntaxError("Variable tags must include at least 1 argument")
+    }
+
+    variable = Variable(bits[0])
+    let filterBits = bits[1 ..< bits.endIndex]
+
+    do {
+      filters = try filterBits.map { try parser.findFilter($0) }
+    } catch {
+      filters = []
+      throw error
+    }
+  }
+
+  func resolve(context: Context) throws -> Any? {
+    let result = try variable.resolve(context)
+
+    return try filters.reduce(result) { x, y in
+      return try y(x)
+    }
+  }
+}
+
+/// A structure used to represent a template variable, and to resolve it in a given context.
+public struct Variable : Equatable, Resolvable {
+  public let variable: String
+
+  /// Create a variable with a string representing the variable
+  public init(_ variable: String) {
+    self.variable = variable
+  }
+
+  private func lookup() -> [String] {
+    return variable.characters.split(".").map(String.init)
+  }
+
+  /// Resolve the variable in the given context
+  public func resolve(context: Context) throws -> Any? {
+    var current: Any? = context
+
+    if (variable.hasPrefix("'") && variable.hasSuffix("'")) || (variable.hasPrefix("\"") && variable.hasSuffix("\"")) {
+      // String literal
+      return variable[variable.startIndex.successor() ..< variable.endIndex.predecessor()]
+    }
+
+    for bit in lookup() {
+      current = normalize(current)
+
+      if let context = current as? Context {
+        current = context[bit]
+      } else if let dictionary = current as? [String: Any] {
+        current = dictionary[bit]
+      } else if let array = current as? [Any] {
+        if let index = Int(bit) {
+          current = array[index]
+        } else if bit == "first" {
+          current = array.first
+        } else if bit == "last" {
+          current = array.last
+        } else if bit == "count" {
+          current = array.count
+        }
+      } else if let object = current as? NSObject {  // NSKeyValueCoding
+#if os(Linux)
+        return nil
+#else
+        current = object.valueForKey(bit)
+#endif
+      } else {
+        return nil
+      }
+    }
+
+    return normalize(current)
+  }
+}
+
+public func ==(lhs: Variable, rhs: Variable) -> Bool {
+  return lhs.variable == rhs.variable
+}
+
+
+func normalize(current: Any?) -> Any? {
+  if let current = current as? Normalizable {
+    return current.normalize()
+  }
+
+  return current
+}
+
+protocol Normalizable {
+  func normalize() -> Any?
+}
+
+extension Array : Normalizable {
+  func normalize() -> Any? {
+    return map { $0 as Any }
+  }
+}
+
+extension NSArray : Normalizable {
+  func normalize() -> Any? {
+    return map { $0 as Any }
+  }
+}
+
+extension Dictionary : Normalizable {
+  func normalize() -> Any? {
+    var dictionary: [String: Any] = [:]
+
+    for (key, value) in self {
+      if let key = key as? String {
+        dictionary[key] = Stencil.normalize(value)
+      } else if let key = key as? CustomStringConvertible {
+        dictionary[key.description] = Stencil.normalize(value)
+      }
+    }
+
+    return dictionary
+  }
+}

Stencil.podspec

@@ -1,13 +0,0 @@
-Pod::Spec.new do |spec|
-  spec.name = 'Stencil'
-  spec.version = '0.1.0'
-  spec.summary = 'Stencil is a simple and powerful template language for Swift.'
-  spec.homepage = 'https://github.com/kylef/Stencil'
-  spec.license = { :type => 'BSD', :file => 'LICENSE' }
-  spec.author = { 'Kyle Fuller' => 'inbox@kylefuller.co.uk' }
-  spec.social_media_url = 'http://twitter.com/kylefuller'
-  spec.source = { :git => 'https://github.com/kylef/Stencil.git', :tag => "#{spec.version}" }
-  spec.source_files = 'Stencil/*.{h,swift}'
-  spec.requires_arc = true
-end
-

Stencil.podspec.json

@@ -0,0 +1,29 @@
+{
+  "name": "Stencil",
+  "version": "0.6.0-beta.1",
+  "summary": "Stencil is a simple and powerful template language for Swift.",
+  "homepage": "https://github.com/kylef/Stencil",
+  "license": {
+    "type": "BSD",
+    "file": "LICENSE"
+  },
+  "authors": {
+    "Kyle Fuller": "kyle@fuller.li"
+  },
+  "social_media_url": "http://twitter.com/kylefuller",
+  "source": {
+    "git": "https://github.com/kylef/Stencil.git",
+    "tag": "0.6.0-beta.1"
+  },
+  "source_files": [
+    "Sources/*.swift"
+  ],
+  "platforms": {
+    "ios": "8.0",
+    "osx": "10.9"
+  },
+  "requires_arc": true,
+  "dependencies": {
+    "PathKit": [ "~> 0.6.0" ]
+  }
+}

Stencil.xcodeproj/project.pbxproj

@@ -1,473 +0,0 @@
-// !$*UTF8*$!
-{
-	archiveVersion = 1;
-	classes = {
-	};
-	objectVersion = 46;
-	objects = {
-
-/* Begin PBXBuildFile section */
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-				INFOPLIST_FILE = StencilTests/Info.plist;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
-				PRODUCT_NAME = "$(TARGET_NAME)";
-			};
-			name = Release;
-		};
-/* End XCBuildConfiguration section */
-
-/* Begin XCConfigurationList section */
-		77FAAE4C19F91E480029DC5E /* Build configuration list for PBXProject "Stencil" */ = {
-			isa = XCConfigurationList;
-			buildConfigurations = (
-				77FAAE6619F91E480029DC5E /* Debug */,
-				77FAAE6719F91E480029DC5E /* Release */,
-			);
-			defaultConfigurationIsVisible = 0;
-			defaultConfigurationName = Release;
-		};
-		77FAAE6819F91E480029DC5E /* Build configuration list for PBXNativeTarget "Stencil" */ = {
-			isa = XCConfigurationList;
-			buildConfigurations = (
-				77FAAE6919F91E480029DC5E /* Debug */,
-				77FAAE6A19F91E480029DC5E /* Release */,
-			);
-			defaultConfigurationIsVisible = 0;
-			defaultConfigurationName = Release;
-		};
-		77FAAE6B19F91E480029DC5E /* Build configuration list for PBXNativeTarget "StencilTests" */ = {
-			isa = XCConfigurationList;
-			buildConfigurations = (
-				77FAAE6C19F91E480029DC5E /* Debug */,
-				77FAAE6D19F91E480029DC5E /* Release */,
-			);
-			defaultConfigurationIsVisible = 0;
-			defaultConfigurationName = Release;
-		};
-/* End XCConfigurationList section */
-	};
-	rootObject = 77FAAE4919F91E480029DC5E /* Project object */;
-}

Stencil.xcodeproj/project.xcworkspace/contents.xcworkspacedata

@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Workspace
-   version = "1.0">
-   <FileRef
-      location = "self:Stencil.xcodeproj">
-   </FileRef>
-</Workspace>

Stencil/Context.swift

@@ -1,50 +0,0 @@
-import Foundation
-
-/// A container for template variables.
-public class Context : Equatable {
-    var dictionaries:[Dictionary<String, AnyObject>]
-
-    public init(dictionary:Dictionary<String, AnyObject>) {
-        dictionaries = [dictionary]
-    }
-
-    public init() {
-        dictionaries = []
-    }
-
-    public subscript(key: String) -> AnyObject? {
-        get {
-            for dictionary in reverse(dictionaries) {
-                if let value:AnyObject = dictionary[key] {
-                    return value
-                }
-            }
-
-            return nil
-        }
-
-        set(value) {
-            if dictionaries.count > 0 {
-                var dictionary = dictionaries.removeLast()
-                dictionary[key] = value
-                dictionaries.append(dictionary)
-            }
-        }
-    }
-
-    public func push() {
-        push(Dictionary<String, String>())
-    }
-
-    public func push(dictionary:Dictionary<String, String>) {
-        dictionaries.append(dictionary)
-    }
-
-    public func pop() {
-        dictionaries.removeLast()
-    }
-}
-
-public func ==(lhs:Context, rhs:Context) -> Bool {
-    return lhs.dictionaries == rhs.dictionaries
-}

Stencil/Info.plist

@@ -1,28 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>CFBundleDevelopmentRegion</key>
-	<string>en</string>
-	<key>CFBundleExecutable</key>
-	<string>$(EXECUTABLE_NAME)</string>
-	<key>CFBundleIdentifier</key>
-	<string>org.cocode.$(PRODUCT_NAME:rfc1034identifier)</string>
-	<key>CFBundleInfoDictionaryVersion</key>
-	<string>6.0</string>
-	<key>CFBundleName</key>
-	<string>$(PRODUCT_NAME)</string>
-	<key>CFBundlePackageType</key>
-	<string>FMWK</string>
-	<key>CFBundleShortVersionString</key>
-	<string>1.0</string>
-	<key>CFBundleSignature</key>
-	<string>????</string>
-	<key>CFBundleVersion</key>
-	<string>$(CURRENT_PROJECT_VERSION)</string>
-	<key>NSHumanReadableCopyright</key>
-	<string>Copyright © 2014 Cocode. All rights reserved.</string>
-	<key>NSPrincipalClass</key>
-	<string></string>
-</dict>
-</plist>

Stencil/Lexer.swift

@@ -1,56 +0,0 @@
-import Foundation
-
-public struct Lexer {
-    public let templateString:String
-    let regex = NSRegularExpression(pattern: "(\\{\\{.*?\\}\\}|\\{%.*?%\\}|\\{#.*?#\\})", options: nil, error: nil)!
-
-    public init(templateString:String) {
-        self.templateString = templateString
-    }
-
-    func createToken(string:String) -> Token {
-        func strip() -> String {
-            return string[string.startIndex.successor().successor()..<string.endIndex.predecessor().predecessor()].stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceCharacterSet())
-        }
-
-        if string.hasPrefix("{{") {
-            return Token.Variable(value: strip())
-        } else if string.hasPrefix("{%") {
-            return Token.Block(value: strip())
-        } else if string.hasPrefix("{#") {
-            return Token.Comment(value: strip())
-        }
-
-        return Token.Text(value: string)
-    }
-
-    public func tokenize() -> [Token] {
-        // Unfortunately NSRegularExpression doesn't have a split.
-        // So here's a really terrible implementation
-
-        var tokens = [Token]()
-
-        let range = NSMakeRange(0, countElements(templateString))
-        var lastIndex = 0
-        let nsTemplateString = templateString as NSString
-        let options = NSMatchingOptions(0)
-        regex.enumerateMatchesInString(templateString, options: options, range: range) { (result, flags, b) in
-            if result.range.location != lastIndex {
-                let previousMatch = nsTemplateString.substringWithRange(NSMakeRange(lastIndex, result.range.location - lastIndex))
-                tokens.append(self.createToken(previousMatch))
-            }
-
-            let match = nsTemplateString.substringWithRange(result.range)
-            tokens.append(self.createToken(match))
-
-            lastIndex = result.range.location + result.range.length
-        }
-
-        if lastIndex < countElements(templateString) {
-            let substring = (templateString as NSString).substringFromIndex(lastIndex)
-            tokens.append(Token.Text(value: substring))
-        }
-
-        return tokens
-    }
-}

Stencil/Node.swift

@@ -1,304 +0,0 @@
-import Foundation
-
-struct NodeError : Error {
-    let token:Token
-    let message:String
-
-    init(token:Token, message:String) {
-        self.token = token
-        self.message = message
-    }
-
-    var description:String {
-        return "\(token.components().first!): \(message)"
-    }
-}
-
-public protocol Node {
-    func render(context:Context) -> Result
-}
-
-extension Array {
-    func map<U>(block:((Element) -> (U?, Error?))) -> ([U]?, Error?) {
-        var results = [U]()
-
-        for item in self {
-            let (result, error) = block(item)
-
-            if let error = error {
-                return (nil, error)
-            } else if (result != nil) {
-                // let result = result exposing a bug in the Swift compier :(
-                results.append(result!)
-            }
-        }
-
-        return (results, nil)
-    }
-}
-
-public func renderNodes(nodes:[Node], context:Context) -> Result {
-    var result = ""
-
-    for item in nodes {
-        switch item.render(context) {
-        case .Success(let string):
-            result += string
-        case .Error(let error):
-            return .Error(error)
-        }
-    }
-
-    return .Success(result)
-}
-
-public class SimpleNode : Node {
-    let handler:(Context) -> (Result)
-
-    public init(handler:((Context) -> (Result))) {
-        self.handler = handler
-    }
-
-    public func render(context:Context) -> Result {
-        return handler(context)
-    }
-}
-
-public class TextNode : Node {
-    public let text:String
-
-    public init(text:String) {
-        self.text = text
-    }
-
-    public func render(context:Context) -> Result {
-        return .Success(self.text)
-    }
-}
-
-public class VariableNode : Node {
-    public let variable:Variable
-
-    public init(variable:Variable) {
-        self.variable = variable
-    }
-
-    public init(variable:String) {
-        self.variable = Variable(variable)
-    }
-
-    public func render(context:Context) -> Result {
-        let result:AnyObject? = variable.resolve(context)
-
-        if let result = result as? String {
-            return .Success(result)
-        } else if let result = result as? NSObject {
-            return .Success(result.description)
-        }
-
-        return .Success("")
-    }
-}
-
-public class NowNode : Node {
-    public let format:Variable
-
-    public class func parse(parser:TokenParser, token:Token) -> TokenParser.Result {
-        var format:Variable?
-
-        let components = token.components()
-        if components.count == 2 {
-            format = Variable(components[1])
-        }
-
-        return .Success(node:NowNode(format:format))
-    }
-
-    public init(format:Variable?) {
-        if let format = format {
-            self.format = format
-        } else {
-            self.format = Variable("\"yyyy-MM-dd 'at' HH:mm\"")
-        }
-    }
-
-    public func render(context: Context) -> Result {
-        let date = NSDate()
-        let format: AnyObject? = self.format.resolve(context)
-        var formatter:NSDateFormatter?
-
-        if let format = format as? NSDateFormatter {
-            formatter = format
-        } else if let format = format as? String {
-            formatter = NSDateFormatter()
-            formatter!.dateFormat = format
-        } else {
-            return .Success("")
-        }
-
-        return .Success(formatter!.stringFromDate(date))
-    }
-}
-
-public class ForNode : Node {
-    let variable:Variable
-    let loopVariable:String
-    let nodes:[Node]
-
-    public class func parse(parser:TokenParser, token:Token) -> TokenParser.Result {
-        let components = token.components()
-        let count = countElements(components)
-
-        if count == 4 && components[2] == "in" {
-            let loopVariable = components[1]
-            let variable = components[3]
-
-            var forNodes:[Node]!
-            var emptyNodes = [Node]()
-
-            switch parser.parse(until(["endfor", "empty"])) {
-                case .Success(let nodes):
-                    forNodes = nodes
-                case .Error(let error):
-                    return .Error(error)
-            }
-
-            if let token = parser.nextToken() {
-                if token.contents == "empty" {
-                    switch parser.parse(until(["endfor"])) {
-                    case .Success(let nodes):
-                        emptyNodes = nodes
-                    case .Error(let error):
-                        return .Error(error)
-                    }
-
-                    parser.nextToken()
-                }
-            } else {
-                return .Error(error: NodeError(token: token, message: "`endfor` was not found."))
-            }
-
-            return .Success(node:ForNode(variable: variable, loopVariable: loopVariable, nodes: forNodes, emptyNodes:emptyNodes))
-        }
-
-        return .Error(error: NodeError(token: token, message: "Invalid syntax. Expected `for x in y`."))
-    }
-
-    public init(variable:String, loopVariable:String, nodes:[Node], emptyNodes:[Node]) {
-        self.variable = Variable(variable)
-        self.loopVariable = loopVariable
-        self.nodes = nodes
-    }
-
-    public func render(context: Context) -> Result {
-        let values = variable.resolve(context) as? [AnyObject]
-        var output = ""
-
-        if let values = values {
-            for item in values {
-                context.push()
-                context[loopVariable] = item
-                let result = renderNodes(nodes, context)
-                context.pop()
-
-                switch result {
-                    case .Success(let string):
-                        output += string
-                    case .Error(let error):
-                        return .Error(error)
-                }
-            }
-        }
-
-        return .Success(output)
-    }
-}
-
-public class IfNode : Node {
-    public let variable:Variable
-    public let trueNodes:[Node]
-    public let falseNodes:[Node]
-
-    public class func parse(parser:TokenParser, token:Token) -> TokenParser.Result {
-        let variable = token.components()[1]
-        var trueNodes = [Node]()
-        var falseNodes = [Node]()
-
-        switch parser.parse(until(["endif", "else"])) {
-            case .Success(let nodes):
-                trueNodes = nodes
-            case .Error(let error):
-                return .Error(error)
-        }
-
-        if let token = parser.nextToken() {
-            if token.contents == "else" {
-                switch parser.parse(until(["endif"])) {
-                    case .Success(let nodes):
-                        falseNodes = nodes
-                    case .Error(let error):
-                        return .Error(error)
-                }
-                parser.nextToken()
-            }
-        } else {
-            return .Error(error:NodeError(token: token, message: "`endif` was not found."))
-        }
-
-        return .Success(node:IfNode(variable: variable, trueNodes: trueNodes, falseNodes: falseNodes))
-    }
-
-    public class func parse_ifnot(parser:TokenParser, token:Token) -> TokenParser.Result {
-        let variable = token.components()[1]
-        var trueNodes = [Node]()
-        var falseNodes = [Node]()
-
-        switch parser.parse(until(["endif", "else"])) {
-        case .Success(let nodes):
-            falseNodes = nodes
-        case .Error(let error):
-            return .Error(error)
-        }
-
-        if let token = parser.nextToken() {
-            if token.contents == "else" {
-                switch parser.parse(until(["endif"])) {
-                case .Success(let nodes):
-                    trueNodes = nodes
-                case .Error(let error):
-                    return .Error(error)
-                }
-                parser.nextToken()
-            }
-        } else {
-            return .Error(error:NodeError(token: token, message: "`endif` was not found."))
-        }
-
-        return .Success(node:IfNode(variable: variable, trueNodes: trueNodes, falseNodes: falseNodes))
-    }
-
-    public init(variable:String, trueNodes:[Node], falseNodes:[Node]) {
-        self.variable = Variable(variable)
-        self.trueNodes = trueNodes
-        self.falseNodes = falseNodes
-    }
-
-    public func render(context: Context) -> Result {
-        let result: AnyObject? = variable.resolve(context)
-        var truthy = false
-
-        if let result = result as? [AnyObject] {
-            if result.count > 0 {
-                truthy = true
-            }
-        } else if let result: AnyObject = result {
-            truthy = true
-        }
-
-        context.push()
-        let output = renderNodes(truthy ? trueNodes : falseNodes, context)
-        context.pop()
-
-        return output
-    }
-}

Stencil/Parser.swift

@@ -1,104 +0,0 @@
-import Foundation
-
-public func until(tags:[String])(parser:TokenParser, token:Token) -> Bool {
-    if let name = token.components().first {
-        for tag in tags {
-            if name == tag {
-                return true
-            }
-        }
-    }
-
-    return false
-}
-
-public class TokenParser {
-    public typealias TagParser = (TokenParser, Token) -> Result
-    public typealias NodeList = [Node]
-
-    public enum Result {
-        case Success(node: Node)
-        case Error(error: Stencil.Error)
-    }
-
-    public enum Results {
-        case Success(nodes: NodeList)
-        case Error(error: Stencil.Error)
-    }
-
-    private var tokens:[Token]
-    private var tags = Dictionary<String, TagParser>()
-
-    public init(tokens:[Token]) {
-        self.tokens = tokens
-        registerTag("for", ForNode.parse)
-        registerTag("if", IfNode.parse)
-        registerTag("ifnot", IfNode.parse_ifnot)
-        registerTag("now", NowNode.parse)
-    }
-
-    public func registerTag(name:String, parser:TagParser) {
-        tags[name] = parser
-    }
-
-    public func registerSimpleTag(name:String, handler:((Context) -> (Stencil.Result))) {
-        registerTag(name, parser: { (parser, token) -> TokenParser.Result in
-            return .Success(node:SimpleNode(handler: handler))
-        })
-    }
-
-    public func parse() -> Results {
-        return parse(nil)
-    }
-
-    public func parse(parse_until:((parser:TokenParser, token:Token) -> (Bool))?) -> TokenParser.Results {
-        var nodes = NodeList()
-
-        while tokens.count > 0 {
-            let token = nextToken()!
-
-            switch token {
-            case .Text(let text):
-                nodes.append(TextNode(text: text))
-            case .Variable(let variable):
-                nodes.append(VariableNode(variable: variable))
-            case .Block(let value):
-                let tag = token.components().first
-
-                if let parse_until = parse_until {
-                    if parse_until(parser: self, token: token) {
-                        prependToken(token)
-                        return .Success(nodes:nodes)
-                    }
-                }
-
-                if let tag = tag {
-                    if let parser = self.tags[tag] {
-                        switch parser(self, token) {
-                            case .Success(let node):
-                                nodes.append(node)
-                            case .Error(let error):
-                                return .Error(error:error)
-                        }
-                    }
-                }
-            case .Comment(let value):
-                continue
-            }
-        }
-
-        return .Success(nodes:nodes)
-    }
-
-    public func nextToken() -> Token? {
-        if tokens.count > 0 {
-            return tokens.removeAtIndex(0)
-        }
-
-        return nil
-    }
-
-    public func prependToken(token:Token) {
-        tokens.insert(token, atIndex: 0)
-    }
-}

Stencil/Result.swift

@@ -1,25 +0,0 @@
-import Foundation
-
-public protocol Error : Printable {
-    
-}
-
-public func ==(lhs:Error, rhs:Error) -> Bool {
-    return lhs.description == rhs.description
-}
-
-public enum Result : Equatable {
-    case Success(String)
-    case Error(Stencil.Error)
-}
-
-public func ==(lhs:Result, rhs:Result) -> Bool {
-    switch (lhs, rhs) {
-    case (.Success(let lhsValue), .Success(let rhsValue)):
-        return lhsValue == rhsValue
-    case (.Error(let lhsValue), .Error(let rhsValue)):
-        return lhsValue == rhsValue
-    default:
-        return false
-    }
-}

Stencil/Stencil.h

@@ -1,18 +0,0 @@
-//
-//  Stencil.h
-//  Stencil
-//
-//  Created by Kyle Fuller on 23/10/2014.
-//  Copyright (c) 2014 Cocode. All rights reserved.
-//  See LICENSE for more details.
-//
-
-#import <Cocoa/Cocoa.h>
-
-//! Project version number for Stencil.
-FOUNDATION_EXPORT double StencilVersionNumber;
-
-//! Project version string for Stencil.
-FOUNDATION_EXPORT const unsigned char StencilVersionString[];
-
-// In this header, you should import all the public headers of your framework using statements like #import <Stencil/PublicHeader.h>

Stencil/Template.swift

@@ -1,53 +0,0 @@
-import Foundation
-
-public class Template {
-    public let parser:TokenParser
-
-    public convenience init?(named:String) {
-        self.init(named:named, inBundle:nil)
-    }
-
-    public convenience init?(named:String, inBundle bundle:NSBundle?) {
-        var url:NSURL?
-
-        if let bundle = bundle {
-            url = bundle.URLForResource(named, withExtension: nil)
-        } else {
-            url = NSBundle.mainBundle().URLForResource(named, withExtension: nil)
-        }
-
-        self.init(URL:url!)
-    }
-
-    public convenience init?(URL:NSURL) {
-        var error:NSError?
-        let maybeTemplateString = NSString(contentsOfURL: URL, encoding: NSUTF8StringEncoding, error: &error)
-        if let templateString = maybeTemplateString {
-            self.init(templateString:templateString)
-        } else {
-            self.init(templateString:"")
-            return nil
-        }
-    }
-
-    public init(templateString:String) {
-        let lexer = Lexer(templateString: templateString)
-        let tokens = lexer.tokenize()
-        parser = TokenParser(tokens: tokens)
-    }
-
-    public func render(context:Context) -> Result {
-        switch parser.parse() {
-            case .Success(let nodes):
-                return renderNodes(nodes, context)
-
-            case .Error(let error):
-                return .Error(error)
-        }
-    }
-
-    public func render() -> Result {
-        let context = Context()
-        return render(context)
-    }
-}

Stencil/Tokenizer.swift

@@ -1,57 +0,0 @@
-import Foundation
-
-public enum Token : Equatable {
-    case Text(value:String)
-    case Variable(value:String)
-    case Comment(value:String)
-    case Block(value:String)
-
-    /// Returns the underlying value as an array seperated by spaces
-    func components() -> [String] {
-        // TODO: Make this smarter and treat quoted strings as a single component
-        let characterSet = NSCharacterSet.whitespaceAndNewlineCharacterSet()
-        
-        func strip(value: String) -> [String] {
-            return value.stringByTrimmingCharactersInSet(characterSet).componentsSeparatedByCharactersInSet(characterSet)
-        }
-
-        switch self {
-            case .Block(let value):
-                return strip(value)
-            case .Variable(let value):
-                return strip(value)
-            case .Text(let value):
-                return strip(value)
-            case .Comment(let value):
-                return strip(value)
-        }
-    }
-
-    var contents:String {
-        switch self {
-            case .Block(let value):
-                return value
-            case .Variable(let value):
-                return value
-            case .Text(let value):
-                return value
-            case .Comment(let value):
-                return value
-        }
-    }
-}
-
-public func ==(lhs:Token, rhs:Token) -> Bool {
-    switch (lhs, rhs) {
-        case (.Text(let lhsValue), .Text(let rhsValue)):
-            return lhsValue == rhsValue
-        case (.Variable(let lhsValue), .Variable(let rhsValue)):
-            return lhsValue == rhsValue
-        case (.Block(let lhsValue), .Block(let rhsValue)):
-            return lhsValue == rhsValue
-        case (.Comment(let lhsValue), .Comment(let rhsValue)):
-            return lhsValue == rhsValue
-        default:
-            return false
-    }
-}

Stencil/Variable.swift

@@ -1,49 +0,0 @@
-import Foundation
-
-public struct Variable : Equatable {
-    public let variable:String
-
-    public init(_ variable:String) {
-        self.variable = variable
-    }
-
-    private func lookup() -> [String] {
-        return variable.componentsSeparatedByString(".")
-    }
-
-    public func resolve(context:Context) -> AnyObject? {
-        var current:AnyObject? = context
-
-        if (variable.hasPrefix("'") && variable.hasSuffix("'")) || (variable.hasPrefix("\"") && variable.hasSuffix("\"")) {
-            return variable.substringWithRange(variable.startIndex.successor() ..< variable.endIndex.predecessor())
-        }
-
-        for bit in lookup() {
-            if let context = current as? Context {
-                current = context[bit]
-            } else if let dictionary = current as? Dictionary<String, AnyObject> {
-                current = dictionary[bit]
-            } else if let array = current as? [AnyObject] {
-                if let index = bit.toInt() {
-                    current = array[index]
-                } else if bit == "first" {
-                    current = array.first
-                } else if bit == "last" {
-                    current = array.last
-                } else if bit == "count" {
-                    current = countElements(array)
-                }
-            } else if let object = current as? NSObject {
-                current = object.valueForKey(bit)
-            } else {
-                return nil
-            }
-        }
-
-        return current
-    }
-}
-
-public func ==(lhs:Variable, rhs:Variable) -> Bool {
-    return lhs.variable == rhs.variable
-}

StencilTests/ContextTests.swift

@@ -1,65 +0,0 @@
-import Cocoa
-import XCTest
-import Stencil
-
-class ContextTests: XCTestCase {
-    var context:Context!
-
-    override func setUp() {
-        context = Context(dictionary: ["name": "Kyle"])
-    }
-
-    func testItAllowsYouToRetrieveAValue() {
-        let name = context["name"] as String!
-        XCTAssertEqual(name, "Kyle")
-    }
-
-    func testItAllowsYouToSetValue() {
-        context["name"] = "Katie"
-
-        let name = context["name"] as String!
-        XCTAssertEqual(name, "Katie")
-    }
-
-    func testItAllowsYouToRemoveAValue() {
-        context["name"] = nil
-        XCTAssertNil(context["name"])
-    }
-
-    func testItAllowsYouToRetrieveAValueFromParent() {
-        context.push()
-
-        let name = context["name"] as String!
-        XCTAssertEqual(name, "Kyle")
-    }
-
-    func testItAllowsYouToOverideAParentVariable() {
-        context.push()
-        context["name"] = "Katie"
-
-        let name = context["name"] as String!
-        XCTAssertEqual(name, "Katie")
-    }
-
-    func testShowAllowYouToPopVariablesRestoringPreviousState() {
-        context.push()
-        context["name"] = "Katie"
-        context.pop()
-
-        let name = context["name"] as String!
-        XCTAssertEqual(name, "Kyle")
-    }
-
-    func testItAllowsYouToPushADictionaryToTheStack() {
-        context.push(["name": "Katie"])
-
-        let name = context["name"] as String!
-        XCTAssertEqual(name, "Katie")
-    }
-
-    func testItAllowsYouToCompareTwoContextsForEquality() {
-        let otherContext = Context(dictionary: ["name": "Kyle"])
-
-        XCTAssertEqual(otherContext, context )
-    }
-}

StencilTests/Info.plist

@@ -1,24 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>CFBundleDevelopmentRegion</key>
-	<string>en</string>
-	<key>CFBundleExecutable</key>
-	<string>$(EXECUTABLE_NAME)</string>
-	<key>CFBundleIdentifier</key>
-	<string>org.cocode.$(PRODUCT_NAME:rfc1034identifier)</string>
-	<key>CFBundleInfoDictionaryVersion</key>
-	<string>6.0</string>
-	<key>CFBundleName</key>
-	<string>$(PRODUCT_NAME)</string>
-	<key>CFBundlePackageType</key>
-	<string>BNDL</string>
-	<key>CFBundleShortVersionString</key>
-	<string>1.0</string>
-	<key>CFBundleSignature</key>
-	<string>????</string>
-	<key>CFBundleVersion</key>
-	<string>1</string>
-</dict>
-</plist>

StencilTests/LexerTests.swift

@@ -1,50 +0,0 @@
-import Cocoa
-import XCTest
-import Stencil
-
-class LexerTests: XCTestCase {
-
-    func testTokenizeText() {
-        let lexer = Lexer(templateString:"Hello World")
-        let tokens = lexer.tokenize()
-
-        XCTAssertEqual(tokens.count, 1)
-        XCTAssertEqual(tokens.first!, Token.Text(value: "Hello World"))
-    }
-
-    func testTokenizeComment() {
-        let lexer = Lexer(templateString:"{# Comment #}")
-        let tokens = lexer.tokenize()
-
-        XCTAssertEqual(tokens.count, 1)
-        XCTAssertEqual(tokens.first!, Token.Comment(value: "Comment"))
-    }
-
-    func testTokenizeVariable() {
-        let lexer = Lexer(templateString:"{{ Variable }}")
-        let tokens = lexer.tokenize()
-
-        XCTAssertEqual(tokens.count, 1)
-        XCTAssertEqual(tokens.first!, Token.Variable(value: "Variable"))
-    }
-
-    func testTokenizeMixture() {
-        let lexer = Lexer(templateString:"My name is {{ name }}.")
-        let tokens = lexer.tokenize()
-
-        XCTAssertEqual(tokens.count, 3)
-        XCTAssertEqual(tokens[0], Token.Text(value: "My name is "))
-        XCTAssertEqual(tokens[1], Token.Variable(value: "name"))
-        XCTAssertEqual(tokens[2], Token.Text(value: "."))
-    }
-
-    func testTokenizeTwoVariables() { // Don't be greedy
-        let lexer = Lexer(templateString:"{{ thing }}{{ name }}")
-        let tokens = lexer.tokenize()
-
-        XCTAssertEqual(tokens.count, 2)
-        XCTAssertEqual(tokens[0], Token.Variable(value: "thing"))
-        XCTAssertEqual(tokens[1], Token.Variable(value: "name"))
-    }
-
-}

StencilTests/NodeTests.swift

@@ -1,250 +0,0 @@
-import Cocoa
-import XCTest
-import Stencil
-
-class ErrorNodeError : Error {
-    var description: String {
-        return "Node Error"
-    }
-}
-
-class ErrorNode : Node {
-    func render(context: Context) -> Result {
-
-        return .Error(ErrorNodeError())
-    }
-}
-
-class NodeTests: XCTestCase {
-    var context:Context!
-
-    override func setUp() {
-        context = Context(dictionary: [
-            "name": "Kyle",
-            "age": 27,
-            "items": [1,2,3],
-        ])
-    }
-}
-
-class TextNodeTests: NodeTests {
-    func testTextNodeResolvesText() {
-        let node = TextNode(text:"Hello World")
-        let result = node.render(context)
-
-        switch node.render(context) {
-            case .Success(let string):
-                XCTAssertEqual(string, "Hello World")
-            case .Error(let error):
-                XCTAssert(false, "Unexpected error")
-        }
-    }
-}
-
-class VariableNodeTests: NodeTests {
-    func testVariableNodeResolvesVariable() {
-        let node = VariableNode(variable:Variable("name"))
-        let result = node.render(context)
-
-        switch node.render(context) {
-            case .Success(let string):
-                XCTAssertEqual(string, "Kyle")
-            case .Error(let error):
-                XCTAssert(false, "Unexpected error")
-        }
-    }
-
-    func testVariableNodeResolvesNonStringVariable() {
-        let node = VariableNode(variable:Variable("age"))
-        let result = node.render(context)
-
-        switch node.render(context) {
-        case .Success(let string):
-            XCTAssertEqual(string, "27")
-        case .Error(let error):
-            XCTAssert(false, "Unexpected error")
-        }
-    }
-}
-
-class RenderNodeTests: NodeTests {
-    func testRenderingNodes() {
-        let nodes = [TextNode(text:"Hello "), VariableNode(variable: "name")] as [Node]
-        switch renderNodes(nodes, context) {
-        case .Success(let result):
-            XCTAssertEqual(result, "Hello Kyle")
-        case .Error(let error):
-            XCTAssert(false, "Unexpected error")
-        }
-    }
-
-    func testRenderingNodesWithFailure() {
-        let nodes = [TextNode(text:"Hello "), VariableNode(variable: "name"), ErrorNode()] as [Node]
-
-        switch renderNodes(nodes, context) {
-        case .Success(let result):
-            XCTAssert(false, "Unexpected success")
-        case .Error(let error):
-            XCTAssertEqual("\(error)", "Node Error")
-        }
-    }
-}
-
-class ForNodeTests: NodeTests {
-    func testForNodeRender() {
-        let node = ForNode(variable: "items", loopVariable: "item", nodes: [VariableNode(variable: "item")], emptyNodes:[])
-        let result = node.render(context)
-
-        switch node.render(context) {
-        case .Success(let string):
-            XCTAssertEqual(string, "123")
-        case .Error(let error):
-            XCTAssert(false, "Unexpected error")
-        }
-    }
-}
-
-class IfNodeTests: NodeTests {
-
-    // MARK: Parsing
-
-    func testParseIf() {
-        let tokens = [
-            Token.Block(value: "if value"),
-                Token.Text(value: "true"),
-            Token.Block(value: "else"),
-                Token.Text(value: "false"),
-            Token.Block(value: "endif")
-        ]
-
-        let parser = TokenParser(tokens: tokens)
-        assertSuccess(parser.parse()) { nodes in
-            let node = nodes.first! as IfNode
-            let trueNode = node.trueNodes.first! as TextNode
-            let falseNode = node.falseNodes.first! as TextNode
-
-            XCTAssertEqual(nodes.count, 1)
-            XCTAssertEqual(node.variable.variable, "value")
-            XCTAssertEqual(node.trueNodes.count, 1)
-            XCTAssertEqual(trueNode.text, "true")
-            XCTAssertEqual(node.falseNodes.count, 1)
-            XCTAssertEqual(falseNode.text, "false")
-        }
-    }
-
-    func testParseIfNot() {
-        let tokens = [
-            Token.Block(value: "ifnot value"),
-                Token.Text(value: "false"),
-            Token.Block(value: "else"),
-                Token.Text(value: "true"),
-            Token.Block(value: "endif")
-        ]
-
-        let parser = TokenParser(tokens: tokens)
-        assertSuccess(parser.parse()) { nodes in
-            let node = nodes.first! as IfNode
-            let trueNode = node.trueNodes.first! as TextNode
-            let falseNode = node.falseNodes.first! as TextNode
-
-            XCTAssertEqual(nodes.count, 1)
-            XCTAssertEqual(node.variable.variable, "value")
-            XCTAssertEqual(node.trueNodes.count, 1)
-            XCTAssertEqual(trueNode.text, "true")
-            XCTAssertEqual(node.falseNodes.count, 1)
-            XCTAssertEqual(falseNode.text, "false")
-        }
-    }
-
-    func testParseIfWithoutEndIfError() {
-        let tokens = [
-            Token.Block(value: "if value"),
-        ]
-
-        let parser = TokenParser(tokens: tokens)
-        assertFailure(parser.parse(), "if: `endif` was not found.")
-    }
-
-    func testParseIfNotWithoutEndIfError() {
-        let tokens = [
-            Token.Block(value: "ifnot value"),
-        ]
-
-        let parser = TokenParser(tokens: tokens)
-        assertFailure(parser.parse(), "ifnot: `endif` was not found.")
-    }
-
-    // MARK: Rendering
-
-    func testIfNodeRenderTruth() {
-        let node = IfNode(variable: "items", trueNodes: [TextNode(text: "true")], falseNodes: [TextNode(text: "false")])
-        let result = node.render(context)
-
-        switch node.render(context) {
-        case .Success(let string):
-            XCTAssertEqual(string, "true")
-        case .Error(let error):
-            XCTAssert(false, "Unexpected error")
-        }
-    }
-
-    func testIfNodeRenderFalse() {
-        let node = IfNode(variable: "unknown", trueNodes: [TextNode(text: "true")], falseNodes: [TextNode(text: "false")])
-        let result = node.render(context)
-
-        switch node.render(context) {
-        case .Success(let string):
-            XCTAssertEqual(string, "false")
-        case .Error(let error):
-            XCTAssert(false, "Unexpected error")
-        }
-    }
-
-}
-
-class NowNodeTests: NodeTests {
-
-    // MARK: Parsing
-
-    func testParseDefaultNow() {
-        let tokens = [ Token.Block(value: "now") ]
-        let parser = TokenParser(tokens: tokens)
-
-        assertSuccess(parser.parse()) { nodes in
-            let node = nodes.first! as NowNode
-            XCTAssertEqual(nodes.count, 1)
-            XCTAssertEqual(node.format.variable, "\"yyyy-MM-dd 'at' HH:mm\"")
-        }
-    }
-
-    func testParseNowWithFormat() {
-        let tokens = [ Token.Block(value: "now \"HH:mm\"") ]
-        let parser = TokenParser(tokens: tokens)
-
-        assertSuccess(parser.parse()) { nodes in
-            let node = nodes.first! as NowNode
-            XCTAssertEqual(nodes.count, 1)
-            XCTAssertEqual(node.format.variable, "\"HH:mm\"")
-        }
-    }
-
-    // MARK: Rendering
-
-    func testRenderNowNode() {
-        let node = NowNode(format: Variable("\"yyyy-MM-dd\""))
-        let result = node.render(context)
-
-        let formatter = NSDateFormatter()
-        formatter.dateFormat = "yyyy-MM-dd"
-        let date = formatter.stringFromDate(NSDate())
-
-        switch node.render(context) {
-        case .Success(let string):
-            XCTAssertEqual(string, date)
-        case .Error(let error):
-            XCTAssert(false, "Unexpected error")
-        }
-    }
-
-}
-

StencilTests/ParserTests.swift

@@ -1,49 +0,0 @@
-import Cocoa
-import XCTest
-import Stencil
-
-class TokenParserTests: XCTestCase {
-    func testParsingTextToken() {
-        let parser = TokenParser(tokens: [
-            Token.Text(value: "Hello World")
-        ])
-
-        assertSuccess(parser.parse()) { nodes in
-            let node = nodes.first as TextNode!
-            XCTAssertEqual(nodes.count, 1)
-            XCTAssertEqual(node.text, "Hello World")
-        }
-    }
-
-    func testParsingVariableToken() {
-        let parser = TokenParser(tokens: [
-            Token.Variable(value: "name")
-        ])
-
-        assertSuccess(parser.parse()) { nodes in
-            let node = nodes.first as VariableNode!
-            XCTAssertEqual(nodes.count, 1)
-            XCTAssertEqual(node.variable, Variable("name"))
-        }
-    }
-
-    func testParsingCommentToken() {
-        let parser = TokenParser(tokens: [
-            Token.Comment(value: "Secret stuff!")
-        ])
-
-        assertSuccess(parser.parse()) { nodes in
-            XCTAssertEqual(nodes.count, 0)
-        }
-    }
-
-    func testParsingTagToken() {
-        let parser = TokenParser(tokens: [
-            Token.Block(value: "now"),
-        ])
-
-        assertSuccess(parser.parse()) { nodes in
-            XCTAssertEqual(nodes.count, 1)
-        }
-    }
-}

StencilTests/StencilTests.swift

@@ -1,79 +0,0 @@
-import Cocoa
-import XCTest
-import Stencil
-
-func assertSuccess(result:TokenParser.Results, block:(([Node]) -> ())) {
-    switch result {
-    case .Success(let nodes):
-        block(nodes)
-    case .Error(let error):
-        XCTAssert(false, "Unexpected error")
-    }
-}
-
-func assertFailure(result:TokenParser.Results, description:String) {
-    switch result {
-    case .Success(let nodes):
-        XCTAssert(false, "Unexpected error")
-    case .Error(let error):
-        XCTAssertEqual("\(error)", description)
-    }
-}
-
-class CustomNode : Node {
-    func render(context:Context) -> Result {
-        return .Success("Hello World")
-    }
-}
-
-class StencilTests: XCTestCase {
-    func testReadmeExample() {
-        let templateString = "There are {{ articles.count }} articles.\n" +
-            "\n" +
-            "{% for article in articles %}" +
-            "    - {{ article.title }} by {{ article.author }}.\n" +
-            "{% endfor %}\n"
-
-        let context = Context(dictionary: [
-            "articles": [
-                [ "title": "Migrating from OCUnit to XCTest", "author": "Kyle Fuller" ],
-                [ "title": "Memory Management with ARC", "author": "Kyle Fuller" ],
-            ]
-        ])
-
-        let template = Template(templateString:templateString)
-        let result = template.render(context)
-
-        let fixture = "There are 2 articles.\n" +
-            "\n" +
-            "    - Migrating from OCUnit to XCTest by Kyle Fuller.\n" +
-            "    - Memory Management with ARC by Kyle Fuller.\n" +
-            "\n"
-
-        XCTAssertEqual(result, Result.Success(fixture))
-    }
-
-    func testCustomTag() {
-        let templateString = "{% custom %}"
-        let template = Template(templateString:templateString)
-
-        template.parser.registerTag("custom") { parser, token in
-            return .Success(node:CustomNode())
-        }
-
-        let result = template.render()
-        XCTAssertEqual(result, Result.Success("Hello World"))
-    }
-
-    func testSimpleCustomTag() {
-        let templateString = "{% custom %}"
-        let template = Template(templateString:templateString)
-
-        template.parser.registerSimpleTag("custom") { context in
-            return .Success("Hello World")
-        }
-
-        let result = template.render()
-        XCTAssertEqual(result, Result.Success("Hello World"))
-    }
-}

StencilTests/TemplateTests.swift

@@ -1,14 +0,0 @@
-import Cocoa
-import XCTest
-import Stencil
-
-class TemplateTests: XCTestCase {
-
-    func testTemplate() {
-        let context = Context(dictionary: [ "name": "Kyle" ])
-        let template = Template(templateString: "Hello World")
-        let result = template.render(context)
-        XCTAssertEqual(result, Result.Success("Hello World"))
-    }
-
-}

StencilTests/VariableTests.swift

@@ -1,62 +0,0 @@
-import Cocoa
-import XCTest
-import Stencil
-
-@objc class Object : NSObject {
-    let title = "Hello World"
-}
-
-class VariableTests: XCTestCase {
-    var context:Context!
-
-    override func setUp() {
-        context = Context(dictionary: [
-            "name": "Kyle",
-            "contacts": [ "Katie", "Orta", ],
-            "profiles": [ "github": "kylef", ],
-            "object": Object(),
-        ])
-    }
-
-    func testResolvingStringLiteral() {
-        let variable = Variable("\"name\"")
-        let result = variable.resolve(context) as String!
-        XCTAssertEqual(result, "name")
-    }
-
-    func testResolvingVariable() {
-        let variable = Variable("name")
-        let result = variable.resolve(context) as String!
-        XCTAssertEqual(result, "Kyle")
-    }
-
-    func testResolvingItemFromDictionary() {
-        let variable = Variable("profiles.github")
-        let result = variable.resolve(context) as String!
-        XCTAssertEqual(result, "kylef")
-    }
-
-    func testResolvingItemFromArrayWithIndex() {
-        let variable = Variable("contacts.0")
-        let result = variable.resolve(context) as String!
-        XCTAssertEqual(result, "Katie")
-    }
-
-    func testResolvingFirstItemFromArray() {
-        let variable = Variable("contacts.first")
-        let result = variable.resolve(context) as String!
-        XCTAssertEqual(result, "Katie")
-    }
-
-    func testResolvingLastItemFromArray() {
-        let variable = Variable("contacts.last")
-        let result = variable.resolve(context) as String!
-        XCTAssertEqual(result, "Orta")
-    }
-
-    func testResolvingValueViaKVO() {
-        let variable = Variable("object.title")
-        let result = variable.resolve(context) as String!
-        XCTAssertEqual(result, "Hello World")
-    }
-}

Tests/ContextSpec.swift

@@ -0,0 +1,62 @@
+import Spectre
+import Stencil
+
+
+func testContext() {
+  describe("Context") {
+    var context: Context!
+
+    $0.before {
+      context = Context(dictionary: ["name": "Kyle"])
+    }
+
+    $0.it("allows you to get a value via subscripting") {
+      try expect(context["name"] as? String) == "Kyle"
+    }
+
+    $0.it("allows you to set a value via subscripting") {
+      context["name"] = "Katie"
+
+      try expect(context["name"] as? String) == "Katie"
+    }
+
+    $0.it("allows you to remove a value via subscripting") {
+      context["name"] = nil
+
+      try expect(context["name"]).to.beNil()
+    }
+
+    $0.it("allows you to retrieve a value from a parent") {
+      try context.push {
+        try expect(context["name"] as? String) == "Kyle"
+      }
+    }
+
+    $0.it("allows you to override a parent's value") {
+      try context.push {
+        context["name"] = "Katie"
+        try expect(context["name"] as? String) == "Katie"
+      }
+    }
+
+    $0.it("allows you to pop to restore previous state") {
+      context.push {
+        context["name"] = "Katie"
+      }
+
+      try expect(context["name"] as? String) == "Kyle"
+    }
+
+    $0.it("allows you to push a dictionary and run a closure then restoring previous state") {
+      var didRun = false
+
+      try context.push(["name": "Katie"]) {
+        didRun = true
+        try expect(context["name"] as? String) == "Katie"
+      }
+
+      try expect(didRun).to.beTrue()
+      try expect(context["name"] as? String) == "Kyle"
+    }
+  }
+}

Tests/FilterSpec.swift

@@ -0,0 +1,70 @@
+import Spectre
+import Stencil
+
+
+func testFilter() {
+  describe("template filters") {
+    let context: [String: Any] = ["name": "Kyle"]
+
+    $0.it("allows you to register a custom filter") {
+      let template = Template(templateString: "{{ name|repeat }}")
+
+      let namespace = Namespace()
+      namespace.registerFilter("repeat") { value in
+        if let value = value as? String {
+          return "\(value) \(value)"
+        }
+
+        return nil
+      }
+
+      let result = try template.render(Context(dictionary: context, namespace: namespace))
+      try expect(result) == "Kyle Kyle"
+    }
+
+    $0.it("allows you to register a custom which throws") {
+      let template = Template(templateString: "{{ name|repeat }}")
+      let namespace = Namespace()
+      namespace.registerFilter("repeat") { value in
+        throw TemplateSyntaxError("No Repeat")
+      }
+
+      try expect(try template.render(Context(dictionary: context, namespace: namespace))).toThrow(TemplateSyntaxError("No Repeat"))
+    }
+
+    $0.it("allows whitespace in expression") {
+      let template = Template(templateString: "{{ name | uppercase }}")
+      let result = try template.render(Context(dictionary: ["name": "kyle"]))
+      try expect(result) == "KYLE"
+    }
+  }
+
+
+  describe("capitalize filter") {
+    let template = Template(templateString: "{{ name|capitalize }}")
+
+    $0.it("capitalizes a string") {
+      let result = try template.render(Context(dictionary: ["name": "kyle"]))
+      try expect(result) == "Kyle"
+    }
+  }
+
+
+  describe("uppercase filter") {
+    let template = Template(templateString: "{{ name|uppercase }}")
+
+    $0.it("transforms a string to be uppercase") {
+      let result = try template.render(Context(dictionary: ["name": "kyle"]))
+      try expect(result) == "KYLE"
+    }
+  }
+
+  describe("lowercase filter") {
+    let template = Template(templateString: "{{ name|lowercase }}")
+
+    $0.it("transforms a string to be lowercase") {
+      let result = try template.render(Context(dictionary: ["name": "Kyle"]))
+      try expect(result) == "kyle"
+    }
+  }
+}

Tests/LexerSpec.swift

@@ -0,0 +1,50 @@
+import Spectre
+import Stencil
+
+
+func testLexer() {
+  describe("Lexer") {
+    $0.it("can tokenize text") {
+      let lexer = Lexer(templateString: "Hello World")
+      let tokens = lexer.tokenize()
+
+      try expect(tokens.count) == 1
+      try expect(tokens.first) == Token.Text(value: "Hello World")
+    }
+
+    $0.it("can tokenize a comment") {
+      let lexer = Lexer(templateString: "{# Comment #}")
+      let tokens = lexer.tokenize()
+
+      try expect(tokens.count) == (1)
+      try expect(tokens.first) == Token.Comment(value: "Comment")
+    }
+
+    $0.it("can tokenize a variable") {
+      let lexer = Lexer(templateString: "{{ Variable }}")
+      let tokens = lexer.tokenize()
+
+      try expect(tokens.count) == 1
+      try expect(tokens.first) == Token.Variable(value: "Variable")
+    }
+
+    $0.it("can tokenize a mixture of content") {
+      let lexer = Lexer(templateString: "My name is {{ name }}.")
+      let tokens = lexer.tokenize()
+
+      try expect(tokens.count) == 3
+      try expect(tokens[0]) == Token.Text(value: "My name is ")
+      try expect(tokens[1]) == Token.Variable(value: "name")
+      try expect(tokens[2]) == Token.Text(value: ".")
+    }
+
+    $0.it("can tokenize two variables without being greedy") {
+      let lexer = Lexer(templateString: "{{ thing }}{{ name }}")
+      let tokens = lexer.tokenize()
+
+      try expect(tokens.count) == 2
+      try expect(tokens[0]) == Token.Variable(value: "thing")
+      try expect(tokens[1]) == Token.Variable(value: "name")
+    }
+  }
+}

Tests/Nodes/ForNodeSpec.swift

@@ -0,0 +1,66 @@
+import Spectre
+import Stencil
+import Foundation
+
+
+func testForNode() {
+  describe("ForNode") {
+    let context = Context(dictionary: [
+      "items": [1, 2, 3],
+      "emptyItems": [Int](),
+    ])
+
+    $0.it("renders the given nodes for each item") {
+      let nodes: [NodeType] = [VariableNode(variable: "item")]
+      let node = ForNode(variable: "items", loopVariable: "item", nodes: nodes, emptyNodes: [])
+      try expect(try node.render(context)) == "123"
+    }
+
+    $0.it("renders the given empty nodes when no items found item") {
+      let nodes: [NodeType] = [VariableNode(variable: "item")]
+      let emptyNodes: [NodeType] = [TextNode(text: "empty")]
+      let node = ForNode(variable: "emptyItems", loopVariable: "item", nodes: nodes, emptyNodes: emptyNodes)
+      try expect(try node.render(context)) == "empty"
+    }
+
+    $0.it("renders a context variable of type Array<Any>") {
+      let any_context = Context(dictionary: [
+        "items": ([1, 2, 3] as [Any])
+      ])
+
+      let nodes: [NodeType] = [VariableNode(variable: "item")]
+      let node = ForNode(variable: "items", loopVariable: "item", nodes: nodes, emptyNodes: [])
+      try expect(try node.render(any_context)) == "123" 
+    }
+
+#if os(OSX)
+    $0.it("renders a context variable of type NSArray") {
+      let nsarray_context = Context(dictionary: [
+        "items": NSArray(array: [1, 2, 3])
+      ])
+
+      let nodes: [NodeType] = [VariableNode(variable: "item")]
+      let node = ForNode(variable: "items", loopVariable: "item", nodes: nodes, emptyNodes: [])
+      try expect(try node.render(nsarray_context)) == "123"
+    }
+#endif
+
+    $0.it("renders the given nodes while providing if the item is first in the context") {
+      let nodes: [NodeType] = [VariableNode(variable: "item"), VariableNode(variable: "forloop.first")]
+      let node = ForNode(variable: "items", loopVariable: "item", nodes: nodes, emptyNodes: [])
+      try expect(try node.render(context)) == "1true2false3false"
+    }
+
+    $0.it("renders the given nodes while providing if the item is last in the context") {
+      let nodes: [NodeType] = [VariableNode(variable: "item"), VariableNode(variable: "forloop.last")]
+      let node = ForNode(variable: "items", loopVariable: "item", nodes: nodes, emptyNodes: [])
+      try expect(try node.render(context)) == "1false2false3true"
+    }
+
+    $0.it("renders the given nodes while providing item counter") {
+      let nodes: [NodeType] = [VariableNode(variable: "item"), VariableNode(variable: "forloop.counter")]
+      let node = ForNode(variable: "items", loopVariable: "item", nodes: nodes, emptyNodes: [])
+      try expect(try node.render(context)) == "112233"
+    }
+  }
+}

Tests/Nodes/IfNodeSpec.swift

@@ -0,0 +1,116 @@
+import Spectre
+import Stencil
+
+
+func testIfNode() {
+  describe("IfNode") {
+    $0.describe("parsing") {
+      $0.it("can parse an if block") {
+        let tokens = [
+          Token.Block(value: "if value"),
+          Token.Text(value: "true"),
+          Token.Block(value: "else"),
+          Token.Text(value: "false"),
+          Token.Block(value: "endif")
+        ]
+
+        let parser = TokenParser(tokens: tokens, namespace: Namespace())
+        let nodes = try parser.parse()
+        let node = nodes.first as? IfNode
+        let trueNode = node?.trueNodes.first as? TextNode
+        let falseNode = node?.falseNodes.first as? TextNode
+
+        try expect(nodes.count) == 1
+        try expect(node?.variable.variable) == "value"
+        try expect(node?.trueNodes.count) == 1
+        try expect(trueNode?.text) == "true"
+        try expect(node?.falseNodes.count) == 1
+        try expect(falseNode?.text) == "false"
+      }
+
+      $0.it("can parse an ifnot block") {
+        let tokens = [
+          Token.Block(value: "ifnot value"),
+          Token.Text(value: "false"),
+          Token.Block(value: "else"),
+          Token.Text(value: "true"),
+          Token.Block(value: "endif")
+        ]
+
+        let parser = TokenParser(tokens: tokens, namespace: Namespace())
+        let nodes = try parser.parse()
+        let node = nodes.first as? IfNode
+        let trueNode = node?.trueNodes.first as? TextNode
+        let falseNode = node?.falseNodes.first as? TextNode
+
+        try expect(nodes.count) == 1
+        try expect(node?.variable.variable) == "value"
+        try expect(node?.trueNodes.count) == 1
+        try expect(trueNode?.text) == "true"
+        try expect(node?.falseNodes.count) == 1
+        try expect(falseNode?.text) == "false"
+      }
+
+      $0.it("throws an error when parsing an if block without an endif") {
+        let tokens = [
+          Token.Block(value: "if value"),
+        ]
+
+        let parser = TokenParser(tokens: tokens, namespace: Namespace())
+        let error = TemplateSyntaxError("`endif` was not found.")
+        try expect(try parser.parse()).toThrow(error)
+      }
+
+      $0.it("throws an error when parsing an ifnot without an endif") {
+        let tokens = [
+          Token.Block(value: "ifnot value"),
+        ]
+
+        let parser = TokenParser(tokens: tokens, namespace: Namespace())
+        let error = TemplateSyntaxError("`endif` was not found.")
+        try expect(try parser.parse()).toThrow(error)
+      }
+    }
+
+    $0.describe("rendering") {
+      let context = Context(dictionary: ["items": true])
+
+      $0.it("renders the truth when expression evaluates to true") {
+        let node = IfNode(variable: "items", trueNodes: [TextNode(text: "true")], falseNodes: [TextNode(text: "false")])
+        try expect(try node.render(context)) == "true"
+      }
+
+      $0.it("renders the false when expression evaluates to false") {
+        let node = IfNode(variable: "unknown", trueNodes: [TextNode(text: "true")], falseNodes: [TextNode(text: "false")])
+        try expect(try node.render(context)) == "false"
+      }
+
+      $0.it("renders the truth when array expression is not empty") {
+        let items: [[String: Any]] = [["key":"key1","value":42],["key":"key2","value":1337]]
+        let arrayContext = Context(dictionary: ["items": [items]])
+        let node = IfNode(variable: "items", trueNodes: [TextNode(text: "true")], falseNodes: [TextNode(text: "false")])
+        try expect(try node.render(arrayContext)) == "true"
+      }
+
+      $0.it("renders the false when array expression is empty") {
+        let emptyItems = [[String: Any]]()
+        let arrayContext = Context(dictionary: ["items": emptyItems])
+        let node = IfNode(variable: "items", trueNodes: [TextNode(text: "true")], falseNodes: [TextNode(text: "false")])
+        try expect(try node.render(arrayContext)) == "false"
+      }
+
+      $0.it("renders the false when dictionary expression is empty") {
+        let emptyItems = [String:Any]()
+        let arrayContext = Context(dictionary: ["items": emptyItems])
+        let node = IfNode(variable: "items", trueNodes: [TextNode(text: "true")], falseNodes: [TextNode(text: "false")])
+        try expect(try node.render(arrayContext)) == "false"
+      }
+
+      $0.it("renders the false when Array<Any> variable is empty") {
+        let arrayContext = Context(dictionary: ["items": ([] as [Any])])
+        let node = IfNode(variable: "items", trueNodes: [TextNode(text: "true")], falseNodes: [TextNode(text: "false")])
+        try expect(try node.render(arrayContext)) == "false"
+      }
+    }
+  }
+}

Tests/Nodes/NodeSpec.swift

@@ -0,0 +1,60 @@
+import Spectre
+import Stencil
+
+
+class ErrorNode : NodeType {
+  func render(context: Context) throws -> String {
+    throw TemplateSyntaxError("Custom Error")
+  }
+}
+
+
+func testNode() {
+  describe("Node") {
+    let context = Context(dictionary: [
+      "name": "Kyle",
+      "age": 27,
+      "items": [1, 2, 3],
+    ])
+
+    $0.describe("TextNode") {
+      $0.it("renders the given text") {
+        let node = TextNode(text: "Hello World")
+        try expect(try node.render(context)) == "Hello World"
+      }
+    }
+
+    $0.describe("VariableNode") {
+      $0.it("resolves and renders the variable") {
+        let node = VariableNode(variable: Variable("name"))
+        try expect(try node.render(context)) == "Kyle"
+      }
+
+      $0.it("resolves and renders a non string variable") {
+        let node = VariableNode(variable: Variable("age"))
+        try expect(try node.render(context)) == "27"
+      }
+    }
+
+    $0.describe("rendering nodes") {
+      $0.it("renders the nodes") {
+        let nodes: [NodeType] = [
+          TextNode(text:"Hello "),
+          VariableNode(variable: "name"),
+        ]
+
+        try expect(try renderNodes(nodes, context)) == "Hello Kyle"
+      }
+
+      $0.it("correctly throws a nodes failure") {
+        let nodes: [NodeType] = [
+          TextNode(text:"Hello "),
+          VariableNode(variable: "name"),
+          ErrorNode(),
+        ]
+
+        try expect(try renderNodes(nodes, context)).toThrow(TemplateSyntaxError("Custom Error"))
+      }
+    }
+  }
+}

Tests/Nodes/NowNodeSpec.swift

@@ -0,0 +1,43 @@
+import Foundation
+import Spectre
+import Stencil
+
+
+func testNowNode() {
+#if !os(Linux)
+  describe("NowNode") {
+    $0.describe("parsing") {
+      $0.it("parses default format without any now arguments") {
+        let tokens = [ Token.Block(value: "now") ]
+        let parser = TokenParser(tokens: tokens, namespace: Namespace())
+
+        let nodes = try parser.parse()
+        let node = nodes.first as? NowNode
+        try expect(nodes.count) == 1
+        try expect(node?.format.variable) == "\"yyyy-MM-dd 'at' HH:mm\""
+      }
+
+      $0.it("parses now with a format") {
+        let tokens = [ Token.Block(value: "now \"HH:mm\"") ]
+        let parser = TokenParser(tokens: tokens, namespace: Namespace())
+        let nodes = try parser.parse()
+        let node = nodes.first as? NowNode
+        try expect(nodes.count) == 1
+        try expect(node?.format.variable) == "\"HH:mm\""
+      }
+    }
+
+    $0.describe("rendering") {
+      $0.it("renders the date") {
+        let node = NowNode(format: Variable("\"yyyy-MM-dd\""))
+
+        let formatter = NSDateFormatter()
+        formatter.dateFormat = "yyyy-MM-dd"
+        let date = formatter.stringFromDate(NSDate())
+
+        try expect(try node.render(Context())) == date
+      }
+    }
+  }
+#endif
+}

Tests/ParserSpec.swift

@@ -0,0 +1,62 @@
+import Spectre
+import Stencil
+
+
+func testTokenParser() {
+  describe("TokenParser") {
+    $0.it("can parse a text token") {
+      let parser = TokenParser(tokens: [
+        Token.Text(value: "Hello World")
+      ], namespace: Namespace())
+
+      let nodes = try parser.parse()
+      let node = nodes.first as? TextNode
+
+      try expect(nodes.count) == 1
+      try expect(node?.text) == "Hello World"
+    }
+
+    $0.it("can parse a variable token") {
+      let parser = TokenParser(tokens: [
+        Token.Variable(value: "'name'")
+      ], namespace: Namespace())
+
+      let nodes = try parser.parse()
+      let node = nodes.first as? VariableNode
+      try expect(nodes.count) == 1
+      let result = try node?.render(Context())
+      try expect(result) == "name"
+    }
+
+    $0.it("can parse a comment token") {
+      let parser = TokenParser(tokens: [
+        Token.Comment(value: "Secret stuff!")
+      ], namespace: Namespace())
+
+      let nodes = try parser.parse()
+      try expect(nodes.count) == 0
+    }
+
+    $0.it("can parse a tag token") {
+      let namespace = Namespace()
+      namespace.registerSimpleTag("known") { _ in
+        return ""
+      }
+
+      let parser = TokenParser(tokens: [
+        Token.Block(value: "known"),
+      ], namespace: namespace)
+
+      let nodes = try parser.parse()
+      try expect(nodes.count) == 1
+    }
+
+    $0.it("errors when parsing an unknown tag") {
+      let parser = TokenParser(tokens: [
+        Token.Block(value: "unknown"),
+      ], namespace: Namespace())
+
+      try expect(try parser.parse()).toThrow(TemplateSyntaxError("Unknown template tag 'unknown'"))
+    }
+  }
+}

Tests/StencilSpec.swift

@@ -0,0 +1,65 @@
+import Spectre
+import Stencil
+
+
+class CustomNode : NodeType {
+  func render(context:Context) throws -> String {
+    return "Hello World"
+  }
+}
+
+
+func testStencil() {
+  describe("Stencil") {
+    $0.it("can render the README example") {
+      let templateString = "There are {{ articles.count }} articles.\n" +
+        "\n" +
+        "{% for article in articles %}" +
+        "    - {{ article.title }} by {{ article.author }}.\n" +
+        "{% endfor %}\n"
+
+      let context = Context(dictionary: [
+        "articles": [
+          [ "title": "Migrating from OCUnit to XCTest", "author": "Kyle Fuller" ],
+          [ "title": "Memory Management with ARC", "author": "Kyle Fuller" ],
+        ]
+      ])
+
+      let template = Template(templateString: templateString)
+      let result = try template.render(context)
+
+      let fixture = "There are 2 articles.\n" +
+        "\n" +
+        "    - Migrating from OCUnit to XCTest by Kyle Fuller.\n" +
+        "    - Memory Management with ARC by Kyle Fuller.\n" +
+        "\n"
+
+      try expect(result) == fixture
+    }
+
+    $0.it("can render a custom template tag") {
+      let templateString = "{% custom %}"
+      let template = Template(templateString: templateString)
+
+      let namespace = Namespace()
+      namespace.registerTag("custom") { parser, token in
+        return CustomNode()
+      }
+
+      let result = try template.render(Context(namespace: namespace))
+      try expect(result) == "Hello World"
+    }
+
+    $0.it("can render a simple custom tag") {
+      let templateString = "{% custom %}"
+      let template = Template(templateString: templateString)
+
+      let namespace = Namespace()
+      namespace.registerSimpleTag("custom") { context in
+        return "Hello World"
+      }
+
+      try expect(try template.render(Context(namespace: namespace))) == "Hello World"
+    }
+  }
+}

Tests/TemplateLoader/IncludeSpec.swift

@@ -0,0 +1,60 @@
+import Spectre
+import Stencil
+import PathKit
+
+
+func testInclude() {
+  describe("Include") {
+    let path = Path(__FILE__) + ".." + ".." + "fixtures"
+    let loader = TemplateLoader(paths: [path])
+
+    $0.describe("parsing") {
+      $0.it("throws an error when no template is given") {
+        let tokens = [ Token.Block(value: "include") ]
+        let parser = TokenParser(tokens: tokens, namespace: Namespace())
+
+        let error = TemplateSyntaxError("'include' tag takes one argument, the template file to be included")
+        try expect(try parser.parse()).toThrow(error)
+      }
+
+      $0.it("can parse a valid include block") {
+        let tokens = [ Token.Block(value: "include \"test.html\"") ]
+        let parser = TokenParser(tokens: tokens, namespace: Namespace())
+
+        let nodes = try parser.parse()
+        let node = nodes.first as? IncludeNode
+        try expect(nodes.count) == 1
+        try expect(node?.templateName) == Variable("\"test.html\"")
+      }
+    }
+
+    $0.describe("rendering") {
+      $0.it("throws an error when rendering without a loader") {
+        let node = IncludeNode(templateName: Variable("\"test.html\""))
+
+        do {
+          try node.render(Context())
+        } catch {
+          try expect("\(error)") == "Template loader not in context"
+        }
+      }
+
+      $0.it("throws an error when it cannot find the included template") {
+        let node = IncludeNode(templateName: Variable("\"unknown.html\""))
+
+        do {
+          try node.render(Context(dictionary: ["loader": loader]))
+        } catch {
+          try expect("\(error)".hasPrefix("'unknown.html' template not found")).to.beTrue()
+        }
+      }
+
+      $0.it("successfully renders a found included template") {
+        let node = IncludeNode(templateName: Variable("\"test.html\""))
+        let context = Context(dictionary: ["loader":loader, "target": "World"])
+        let value = try node.render(context)
+        try expect(value) == "Hello World!"
+      }
+    }
+  }
+}

Tests/TemplateLoader/InheritenceSpec.swift

@@ -0,0 +1,17 @@
+import Spectre
+import Stencil
+import PathKit
+
+
+func testInheritence() {
+  describe("Inheritence") {
+    let path = Path(__FILE__) + ".." + ".." + "fixtures"
+    let loader = TemplateLoader(paths: [path])
+
+    $0.it("can inherit from another template") {
+      let context = Context(dictionary: ["loader": loader])
+      let template = loader.loadTemplate("child.html")
+      try expect(try template?.render(context)) == "Header\nChild"
+    }
+  }
+}

Tests/TemplateLoaderSpec.swift

@@ -0,0 +1,25 @@
+import Spectre
+import Stencil
+import PathKit
+
+
+func testTemplateLoader() {
+  describe("TemplateLoader") {
+    let path = Path(__FILE__) + ".." + ".." + "Tests" + "fixtures"
+    let loader = TemplateLoader(paths: [path])
+
+    $0.it("returns nil when a template cannot be found") {
+      try expect(loader.loadTemplate("unknown.html")).to.beNil()
+    }
+
+    $0.it("returns nil when an array of templates cannot be found") {
+      try expect(loader.loadTemplate(["unknown.html", "unknown2.html"])).to.beNil()
+    }
+
+    $0.it("can load a template from a file") {
+      if loader.loadTemplate("test.html") == nil {
+        throw failure("didn't find the template")
+      }
+    }
+  }
+}

Tests/TemplateSpec.swift

@@ -0,0 +1,14 @@
+import Spectre
+import Stencil
+
+
+func testTemplate() {
+  describe("Template") {
+    $0.it("can render a template from a string") {
+      let context = Context(dictionary: [ "name": "Kyle" ])
+      let template = Template(templateString: "Hello World")
+      let result = try template.render(context)
+      try expect(result) == "Hello World"
+    }
+  }
+}

Tests/TokenSpec.swift

@@ -0,0 +1,34 @@
+import Spectre
+import Stencil
+
+
+func testToken() {
+  describe("Token") {
+    $0.it("can split the contents into components") {
+      let token = Token.Text(value: "hello world")
+      let components = token.components()
+
+      try expect(components.count) == 2
+      try expect(components[0]) == "hello"
+      try expect(components[1]) == "world"
+    }
+
+    $0.it("can split the contents into components with single quoted strings") {
+      let token = Token.Text(value: "hello 'kyle fuller'")
+      let components = token.components()
+
+      try expect(components.count) == 2
+      try expect(components[0]) == "hello"
+      try expect(components[1]) == "'kyle fuller'"
+    }
+
+    $0.it("can split the contents into components with double quoted strings") {
+      let token = Token.Text(value: "hello \"kyle fuller\"")
+      let components = token.components()
+
+      try expect(components.count) == 2
+      try expect(components[0]) == "hello"
+      try expect(components[1]) == "\"kyle fuller\""
+    }
+  }
+}

Tests/VariableSpec.swift

@@ -0,0 +1,77 @@
+import Foundation
+import Spectre
+import Stencil
+
+
+#if os(OSX)
+@objc class Object : NSObject {
+  let title = "Hello World"
+}
+#endif
+
+
+func testVariable() {
+  describe("Variable") {
+    let context = Context(dictionary: [
+      "name": "Kyle",
+      "contacts": ["Katie", "Carlton"],
+      "profiles": [
+        "github": "kylef",
+      ],
+    ])
+
+#if os(OSX)
+    context["object"] = Object()
+#endif
+
+    $0.it("can resolve a string literal with double quotes") {
+      let variable = Variable("\"name\"")
+      let result = try variable.resolve(context) as? String
+      try expect(result) == "name"
+    }
+
+    $0.it("can resolve a string literal with single quotes") {
+      let variable = Variable("'name'")
+      let result = try variable.resolve(context) as? String
+      try expect(result) == "name"
+    }
+
+    $0.it("can resolve a string variable") {
+      let variable = Variable("name")
+      let result = try variable.resolve(context) as? String
+      try expect(result) == "Kyle"
+    }
+
+    $0.it("can resolve an item from a dictionary") {
+      let variable = Variable("profiles.github")
+      let result = try variable.resolve(context) as? String
+      try expect(result) == "kylef"
+    }
+
+    $0.it("can resolve an item from an array via it's index") {
+      let variable = Variable("contacts.0")
+      let result = try variable.resolve(context) as? String
+      try expect(result) == "Katie"
+    }
+
+    $0.it("can resolve the first item from an array") {
+      let variable = Variable("contacts.first")
+      let result = try variable.resolve(context) as? String
+      try expect(result) == "Katie"
+    }
+
+    $0.it("can resolve the last item from an array") {
+      let variable = Variable("contacts.last")
+      let result = try variable.resolve(context) as? String
+      try expect(result) == "Carlton"
+    }
+
+#if os(OSX)
+    $0.it("can resolve a value via KVO") {
+      let variable = Variable("object.title")
+      let result = try variable.resolve(context) as? String
+      try expect(result) == "Hello World"
+    }
+#endif
+  }
+}

Tests/fixtures/base.html

@@ -0,0 +1,2 @@
+{% block header %}Header{% endblock %}
+{% block body %}Body{% endblock %}

Tests/fixtures/child.html

@@ -0,0 +1,2 @@
+{% extends "base.html" %}
+{% block body %}Child{% endblock %}

Tests/fixtures/test.html

@@ -0,0 +1 @@
+Hello {{ target }}!

Tests/main.swift

@@ -0,0 +1,15 @@
+testContext()
+testFilter()
+testLexer()
+testToken()
+testTokenParser()
+testTemplateLoader()
+testTemplate()
+testVariable()
+testNode()
+testForNode()
+testIfNode()
+testNowNode()
+testInclude()
+testInheritence()
+testStencil()