feat: Working on documentation

Examples/README.md

@@ -0,0 +1,26 @@
+# swift-cli-doc
+
+A tool for building rich documentation for command line applications using result builders and
+syntax similar to `SwiftUI`.
+
+## Getting Started
+
+Add this as a package dependency to your command line application.
+
+```swift
+let package = Package(
+  name: "my-tool"
+  ...
+  dependencies: [
+    .package(url: "https://git.housh.dev/michael/swift-cli-doc", from: "0.1.0")
+  ],
+  targets: [
+    .executableTarget(
+      name: "my-tool",
+      dependencies: [
+        .product(name: "CliDoc", package: "swift-cli-doc")
+      ]
+    )
+  ]
+)
+```

Examples/Sources/CliDoc-Examples/CliDoc_Examples.swift

@@ -9,7 +9,8 @@ struct Application: ParsableCommand {
       subcommands: [
         SectionCommand.self,
         VStackCommand.self,
-        HStackCommand.self
+        HStackCommand.self,
+        GroupCommand.self
       ]
     )
   }

Examples/Sources/CliDoc-Examples/GroupCommand.swift

@@ -0,0 +1,21 @@
+import ArgumentParser
+import CliDocCore
+
+struct GroupCommand: ParsableCommand {
+
+  static let configuration = CommandConfiguration(commandName: "group")
+
+  func run() throws {
+    let group = Group {
+      "My headline."
+      "\n"
+      "Some content".color(.green)
+      "\n"
+      "Foo Bar".italic()
+    }
+    .color(.blue)
+
+    print()
+    print("\(group.render())")
+  }
+}

Sources/CliDocCore/Nodes/Group.swift

@@ -2,6 +2,23 @@
 ///
 /// This allows you to group content together, which can optionally be
 /// styled.
+///
+/// ### Example:
+///
+/// ```swift
+/// let group = Group {
+///   "My headline."
+///   "\n"
+///   "Some content".color(.green)
+///   "\n"
+///   "Foo Bar".italic()
+/// }
+///
+/// print(group.render())
+/// ```
+///
+/// ![Group example](group.png)
+///
 public struct Group<Content: TextNode>: TextNode {
 
   @usableFromInline

Sources/CliDocCore/Nodes/HStack.swift

@@ -59,7 +59,7 @@ public extension HStack {
 /// Style a ``HStack`` by creating a type that conforms to ``HStackStyle`` and use the
 /// style by calling the ``HStack/style(_:)`` method on your instance.
 ///
-public protocol HStackStyle: TextModifier where Content == StackConfiguration {}
+public protocol HStackStyle: TextModifier where Content == _StackConfiguration {}
 
 public extension HStackStyle where Self == HStackSeparatorStyle {
   /// Apply the given separator on a ``HStack``.
@@ -88,7 +88,7 @@ public struct HStackSeparatorStyle: HStackStyle {
   }
 
   @inlinable
-  public func render(content: StackConfiguration) -> some TextNode {
+  public func render(content: _StackConfiguration) -> some TextNode {
     AnySeparatableStackNode(content: content, separator: separator)
   }
 }

Sources/CliDocCore/Nodes/StackConfiguration.swift

@@ -1,10 +1,14 @@
+// swiftlint:disable type_name
 /// Represents the content of an ``HStack`` or a ``VStack``.
 ///
-///
-public struct StackConfiguration {
+/// This is an internal convenience type, but needs to remain public
+/// for protcol conformances to work properly.
+public struct _StackConfiguration {
   public let content: [any TextNode]
 }
 
+// swiftlint:enable type_name
+
 /// A helper type that removes empty text nodes, and applies a separtor between
 /// the array of text nodes.
 ///
@@ -18,7 +22,7 @@ struct AnySeparatableStackNode<Separator: TextNode>: TextNode {
   let separator: Separator
 
   @usableFromInline
-  init(content: StackConfiguration, separator: Separator) {
+  init(content: _StackConfiguration, separator: Separator) {
     self.content = content.content
     self.separator = separator
   }

Sources/CliDocCore/Nodes/VStack.swift

@@ -62,7 +62,7 @@ public extension VStack {
 /// Style a ``VStack`` by creating a type that conforms to ``VStackStyle`` and use the
 /// style by calling the ``VStack/style(_:)`` method on your instance.
 ///
-public protocol VStackStyle: TextModifier where Content == StackConfiguration {}
+public protocol VStackStyle: TextModifier where Content == _StackConfiguration {}
 
 public extension VStackStyle where Self == VStackSeparatorStyle {
 
@@ -92,7 +92,7 @@ public struct VStackSeparatorStyle: VStackStyle {
   }
 
   @inlinable
-  public func render(content: StackConfiguration) -> some TextNode {
+  public func render(content: _StackConfiguration) -> some TextNode {
     AnySeparatableStackNode(content: content, separator: separator)
   }
 }

Tests/CliDocCoreTests/CliDocCoreTests.swift

@@ -22,6 +22,26 @@ struct CliDocCoreTests {
       }
     }
     #expect(group.render() == "foobar\("baz".blue)")
+
+    let group2 = Group {
+      VStack {
+        "My headline."
+        "Some text."
+      }
+      "\n"
+      HStack {
+        "Foo"
+        "Bar"
+      }
+    }
+    .color(.green)
+
+    print(group2.render())
+    #expect(group2.render() == """
+    My headline.
+    Some text.
+    Foo Bar
+    """.green)
   }
 
   @Test