Split out all code into modules.

tool/src/main/kotlin/gay/pizza/pork/tool/AstCommand.kt

@@ -0,0 +1,24 @@
+package gay.pizza.pork.tool
+
+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.Node
+import kotlinx.serialization.ExperimentalSerializationApi
+import kotlinx.serialization.json.Json
+
+@OptIn(ExperimentalSerializationApi::class)
+class AstCommand : CliktCommand(help = "Print AST", name = "ast") {
+  val path by argument("file").path(mustExist = true, canBeDir = false)
+
+  private val json = Json {
+    prettyPrint = true
+    prettyPrintIndent = "  "
+    classDiscriminator = "\$"
+  }
+
+  override fun run() {
+    val tool = FileTool(path)
+    println(json.encodeToString(Node.serializer(), tool.parse()))
+  }
+}

tool/src/main/kotlin/gay/pizza/pork/tool/AttributeCommand.kt

@@ -0,0 +1,26 @@
+package gay.pizza.pork.tool
+
+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.NodeCoalescer
+import gay.pizza.pork.parser.TokenNodeAttribution
+
+class AttributeCommand : CliktCommand(help = "Attribute AST", name = "attribute") {
+  val path by argument("file").path(mustExist = true, canBeDir = false)
+
+  override fun run() {
+    val tool = FileTool(path)
+    val attribution = TokenNodeAttribution()
+    val compilationUnit = tool.parse(attribution)
+
+    val coalescer = NodeCoalescer { node ->
+      val tokens = attribution.assembleTokens(node)
+      println("node ${node.toString().replace("\n", "^")}")
+      for (token in tokens) {
+        println("token $token")
+      }
+    }
+    coalescer.visit(compilationUnit)
+  }
+}

tool/src/main/kotlin/gay/pizza/pork/tool/FileTool.kt

@@ -0,0 +1,13 @@
+package gay.pizza.pork.tool
+
+import gay.pizza.pork.frontend.ContentSource
+import gay.pizza.pork.frontend.FsContentSource
+import gay.pizza.pork.parser.StringCharSource
+import java.nio.file.Path
+import kotlin.io.path.readText
+
+class FileTool(val path: Path) : Tool() {
+  override fun createCharSource(): gay.pizza.pork.parser.CharSource = StringCharSource(path.readText())
+  override fun createContentSource(): ContentSource = FsContentSource(path.parent)
+  override fun rootFilePath(): String = path.fileName.toString()
+}

tool/src/main/kotlin/gay/pizza/pork/tool/HighlightCommand.kt

@@ -0,0 +1,14 @@
+package gay.pizza.pork.tool
+
+import com.github.ajalt.clikt.core.CliktCommand
+import com.github.ajalt.clikt.parameters.arguments.argument
+import com.github.ajalt.clikt.parameters.types.path
+
+class HighlightCommand : CliktCommand(help = "Syntax Highlighter", name = "highlight") {
+  val path by argument("file").path(mustExist = true, canBeDir = false)
+
+  override fun run() {
+    val tool = FileTool(path)
+    print(tool.highlight(gay.pizza.pork.parser.AnsiHighlightScheme()).joinToString(""))
+  }
+}

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

@@ -0,0 +1,14 @@
+package gay.pizza.pork.tool
+
+import com.github.ajalt.clikt.core.CliktCommand
+import com.github.ajalt.clikt.parameters.arguments.argument
+import com.github.ajalt.clikt.parameters.types.path
+
+class ReprintCommand : CliktCommand(help = "Reprint Parsed Compilation Unit", name = "reprint") {
+  val path by argument("file").path(mustExist = true, canBeDir = false)
+
+  override fun run() {
+    val tool = FileTool(path)
+    print(tool.reprint())
+  }
+}

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

@@ -0,0 +1,22 @@
+package gay.pizza.pork.tool
+
+import com.github.ajalt.clikt.core.CliktCommand
+import com.github.ajalt.clikt.core.subcommands
+
+class RootCommand : CliktCommand(
+  help = "Pork - The BBQ Language",
+  name = "pork"
+) {
+  init {
+    subcommands(
+      RunCommand(),
+      HighlightCommand(),
+      TokenizeCommand(),
+      ReprintCommand(),
+      AstCommand(),
+      AttributeCommand()
+    )
+  }
+
+  override fun run() {}
+}

tool/src/main/kotlin/gay/pizza/pork/tool/RunCommand.kt

@@ -0,0 +1,22 @@
+package gay.pizza.pork.tool
+
+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.evaluator.CallableFunction
+import gay.pizza.pork.evaluator.Scope
+
+class RunCommand : CliktCommand(help = "Run Program", name = "run") {
+  val path by argument("file").path(mustExist = true, canBeDir = false)
+
+  override fun run() {
+    val tool = FileTool(path)
+    val scope = Scope()
+    scope.define("println", CallableFunction { arguments ->
+      for (argument in arguments.values) {
+        println(argument)
+      }
+    })
+    tool.evaluate(scope)
+  }
+}

tool/src/main/kotlin/gay/pizza/pork/tool/TokenizeCommand.kt

@@ -0,0 +1,22 @@
+package gay.pizza.pork.tool
+
+import com.github.ajalt.clikt.core.CliktCommand
+import com.github.ajalt.clikt.parameters.arguments.argument
+import com.github.ajalt.clikt.parameters.types.path
+
+class TokenizeCommand : CliktCommand(help = "Tokenize Compilation Unit", name = "tokenize") {
+  val path by argument("file").path(mustExist = true, canBeDir = false)
+
+  override fun run() {
+    val tool = FileTool(path)
+    val tokenStream = tool.tokenize()
+    for (token in tokenStream.tokens) {
+      println("${token.start} ${token.type.name} '${sanitize(token.text)}'")
+    }
+  }
+
+  private fun sanitize(input: String): String =
+    input
+      .replace("\n", "\\n")
+      .replace("\r", "\\r")
+}

tool/src/main/kotlin/gay/pizza/pork/tool/Tool.kt

@@ -0,0 +1,38 @@
+package gay.pizza.pork.tool
+
+import gay.pizza.pork.ast.NodeVisitor
+import gay.pizza.pork.parser.Printer
+import gay.pizza.pork.ast.CompilationUnit
+import gay.pizza.pork.evaluator.Arguments
+import gay.pizza.pork.evaluator.Evaluator
+import gay.pizza.pork.evaluator.Scope
+import gay.pizza.pork.frontend.ContentSource
+import gay.pizza.pork.frontend.World
+import gay.pizza.pork.parser.*
+
+abstract class Tool {
+  abstract fun createCharSource(): CharSource
+  abstract fun createContentSource(): ContentSource
+  abstract fun rootFilePath(): String
+
+  fun tokenize(): TokenStream =
+    Tokenizer(createCharSource()).tokenize()
+
+  fun parse(attribution: NodeAttribution = DiscardNodeAttribution): CompilationUnit =
+    Parser(TokenStreamSource(tokenize()), attribution).readCompilationUnit()
+
+  fun highlight(scheme: HighlightScheme): List<Highlight> =
+    Highlighter(scheme).highlight(tokenize())
+
+  fun reprint(): String = buildString { visit(Printer(this)) }
+
+  fun <T> visit(visitor: NodeVisitor<T>): T = visitor.visit(parse())
+
+  fun evaluate(scope: Scope) {
+    val contentSource = createContentSource()
+    val world = World(contentSource)
+    val evaluator = Evaluator(world, scope)
+    val resultingScope = evaluator.evaluate(rootFilePath())
+    resultingScope.call("main", Arguments(emptyList()))
+  }
+}

tool/src/main/kotlin/gay/pizza/pork/tool/main.kt

@@ -0,0 +1,3 @@
+package gay.pizza.pork.tool
+
+fun main(args: Array<String>) = RootCommand().main(args)