feat: Begins vault commands, adds nodes for rendering discussion documentation.

Sources/hpa/VaultCommands/DecryptCommand.swift

@@ -0,0 +1,23 @@
+import ArgumentParser
+
+struct DecryptCommand: AsyncParsableCommand {
+
+  static let commandName = "decrypt"
+
+  static let configuration = CommandConfiguration(
+    commandName: commandName,
+    abstract: createAbstract("Decrypt a vault file.")
+  )
+
+  @OptionGroup var options: VaultOptions
+
+  @Option(
+    name: .shortAndLong,
+    help: "Output file."
+  )
+  var output: String?
+
+  mutating func run() async throws {
+    fatalError()
+  }
+}

Sources/hpa/VaultCommands/EncryptCommand.swift

@@ -0,0 +1,23 @@
+import ArgumentParser
+
+struct EncryptCommand: AsyncParsableCommand {
+
+  static let commandName = "encrypt"
+
+  static let configuration = CommandConfiguration(
+    commandName: commandName,
+    abstract: createAbstract("Encrypt a vault file.")
+  )
+
+  @OptionGroup var options: VaultOptions
+
+  @Option(
+    name: .shortAndLong,
+    help: "Output file."
+  )
+  var output: String?
+
+  mutating func run() async throws {
+    fatalError()
+  }
+}

Sources/hpa/VaultCommands/VaultCommand.swift

@@ -0,0 +1,14 @@
+import ArgumentParser
+
+struct VaultCommand: AsyncParsableCommand {
+
+  static let commandName = "vault"
+
+  static let configuration = CommandConfiguration(
+    commandName: commandName,
+    abstract: createAbstract("Vault commands."),
+    subcommands: [
+      EncryptCommand.self, DecryptCommand.self
+    ]
+  )
+}

Sources/hpa/VaultCommands/VaultOptions.swift

@@ -0,0 +1,31 @@
+import ArgumentParser
+
+// Holds the common options for vault commands, as they all share the
+// same structure.
+@dynamicMemberLookup
+struct VaultOptions: ParsableArguments {
+
+  @OptionGroup var globals: BasicGlobalOptions
+
+  @Option(
+    name: .shortAndLong,
+    help: "The vault file path.",
+    completion: .file()
+  )
+  var file: String?
+
+  @Argument(
+    help: "Extra arguments to pass to the vault command."
+  )
+  var extraArgs: [String] = []
+
+  subscript<T>(dynamicMember keyPath: WritableKeyPath<BasicGlobalOptions, T>) -> T {
+    get { globals[keyPath: keyPath] }
+    set { globals[keyPath: keyPath] = newValue }
+  }
+
+  subscript<T>(dynamicMember keyPath: KeyPath<BasicGlobalOptions, T>) -> T {
+    globals[keyPath: keyPath]
+  }
+
+}