Add reprint command to regenerate program from AST.

src/main/kotlin/gay/pizza/pork/cli/ReprintCommand.kt

@@ -0,0 +1,22 @@
+package gay.pizza.pork.cli
+
+import com.github.ajalt.clikt.core.CliktCommand
+import com.github.ajalt.clikt.parameters.arguments.argument
+import com.github.ajalt.clikt.parameters.types.path
+import gay.pizza.pork.ast.Printer
+import gay.pizza.pork.parse.PorkParser
+import gay.pizza.pork.parse.PorkTokenizer
+import gay.pizza.pork.parse.StringCharSource
+import gay.pizza.pork.parse.TokenStreamSource
+import kotlin.io.path.readText
+
+class ReprintCommand : CliktCommand(help = "Reprint Parsed Program", name = "reprint") {
+  val path by argument("file").path(mustExist = true, canBeDir = false)
+
+  override fun run() {
+    val content = path.readText()
+    val tokenStream = PorkTokenizer(StringCharSource(content)).tokenize()
+    val program = PorkParser(TokenStreamSource(tokenStream)).readProgram()
+    print(buildString { Printer(this).visit(program) })
+  }
+}

src/main/kotlin/gay/pizza/pork/cli/RootCommand.kt

@@ -12,6 +12,7 @@ class RootCommand : CliktCommand(
       RunCommand(),
       HighlightCommand(),
       TokenizeCommand(),
+      ReprintCommand(),
       GenerateKotlinCommand()
     )
   }