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Before doing this, make sure that you setup Chrome to be your default browser or the updater will fail (Firefox will be supported-ish in a future release which you will get automatically).

1. Open ATLauncher to backup your configs
2. Close down ATLauncher
3. In Explorer, go to %APPDATA%\ATLauncher\instances, delete your NowWhat folder, and then re-make it
4. Put packwiz-installer-bootstrap.jar into the new %APPDATA%\ATLauncher\instances\NowWhat folder
5. Open Command Prompt and go to the new folder: cd %APPDATA%\ATLauncher\instances\NowWhat

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Solved

"Bricked" (startup bug)

Steps for Repro

1. Put into demo mode: LCTRL + CAPSLOCK + TAB 3 seconds on startup
2. Unplug

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Advanced Techniques Tutorial

If anyone is interested in more tutorials of things they find mentioned here or would like a sample set of settings files with instructions on how to safely try it out, let me know! ~monkey/fuzzyweapon

Please use the comments section (if you can) to provide feedback, corrections, improvements.

---

In this guide, we'll be stepping through a tutorial that demonstrates some advanced techniques.

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Forgetful Basics

These are things I often need to use but forget. They aren't tricky or difficult, just reminders. * denotes a recommended method.

Return an empty/blank result...

Use `IFERROR(0/0)`

 IF(TRUE(),"blah",IFERROR(0/0))

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set -- each one of us is a part of STDIN

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set -a; . conf-file; set +a

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// From https://github.com/gradle/kotlin-dsl/blob/70aca202558f2f6e43cd8ead3ec95d669bfd7b33/build.gradle.kts#L69
// Preserve file modified dates without using ant.copy task
val copyCurrentDistro by task<Copy> {
	description = "Copies the current Gradle distro into '$customInstallationDir'."

	from(gradle.gradleHomeDir)
	into(customInstallationDir)
	exclude("**/*kotlin*")

	// preserve last modified date on each file to make it easier

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// --- Utility functions -----------------------------------------------
inline fun <reified T : Task> task(noinline configuration: T.() -> Unit) =
		tasks.registering(T::class, configuration)

// Usage
val customInstallation by task<Copy> {
	description = "Copies latest gradle-kotlin-dsl snapshot over the custom installation."
	dependsOn(copyCurrentDistro)
	from(distribution)
	into("$customInstallationDir/lib")

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/**
 * Returns `this` value if it satisfies the given [predicate] or `null`, if it doesn't.
 */
@kotlin.internal.InlineOnly
@SinceKotlin("1.1")
public inline fun <T> T.takeIf(predicate: (T) -> Boolean): T? {
    contract {
        callsInPlace(predicate, InvocationKind.EXACTLY_ONCE)
    }
    return if (predicate(this)) this else null

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// Sub-project or project build.gradle.kts
// This is for KotlinJVM and KotlinJVM multiplatform build.gradle.kts
    java.sourceSets["main"].withConvention(KotlinSourceSet::class) {
        kotlin.srcDir(file("src"))
    }
    java.sourceSets["test"].withConvention(KotlinSourceSet::class) {
        kotlin.srcDir(file("test"))
    }