[+] Argparser extensions

build.gradle

@@ -3,6 +3,7 @@ plugins {
     id 'application'
     id "org.jetbrains.kotlin.jvm" version "1.7.21"
     id "org.openjfx.javafxplugin" version "0.0.13"
+    id "com.github.johnrengelman.shadow" version "7.1.2"
 }
 
 repositories {
@@ -11,8 +12,10 @@ repositories {
 }
 
 dependencies {
-    // This dependency is used by the application.
-    implementation 'com.google.guava:guava:31.0.1-jre'
+    implementation 'com.google.guava:guava:31.1-jre'
+
+    // https://mvnrepository.com/artifact/net.sourceforge.argparse4j/argparse4j
+    implementation 'net.sourceforge.argparse4j:argparse4j:0.9.0'
 }
 
 javafx {

src/main/java/mars/Extensions.kt

@@ -0,0 +1,38 @@
+package mars
+
+import net.sourceforge.argparse4j.impl.Arguments
+import net.sourceforge.argparse4j.inf.Argument
+import net.sourceforge.argparse4j.inf.ArgumentParser
+import net.sourceforge.argparse4j.inf.Namespace
+import java.util.*
+import kotlin.collections.HashMap
+import kotlin.reflect.KProperty
+
+
+val ARG_PARSER_MAP = HashMap<ArgumentParser, Namespace>()
+
+fun ArgumentParser.parseToVars(args: Array<String>) = parseArgs(args).also { ARG_PARSER_MAP[this] = it }
+
+class ArgParserDelegate<T>(val a: ArgumentParser, val name: String)
+{
+    operator fun getValue(thisRef: Any?, property: KProperty<*>): T?
+    {
+        return ARG_PARSER_MAP[a]?.get(name)
+    }
+}
+
+fun <T> ArgumentParser.arg(vararg names: String, help: String? = null, apply: Argument.() -> Unit = {}): ArgParserDelegate<T>
+{
+    val varname = names.last().trimStart('-').replace('-', '_')
+    val arg = addArgument(*names).dest(varname)
+    if (help != null) arg.help(help)
+    apply(arg)
+    return ArgParserDelegate(this, varname)
+}
+
+fun ArgumentParser.string(vararg names: String, help: String? = null, apply: Argument.() -> Unit = {}) =
+    arg<String>(*names, help=help, apply=apply)
+
+fun ArgumentParser.flag(vararg names: String, help: String? = null, apply: Argument.() -> Unit = {}) =
+    arg<Boolean>(*names, help=help) { action(Arguments.storeTrue()); apply() }
+