Johannes Ebner Structed

Creating Neat .NET Core Command Line Apps

You can now read this on my (pretty) website! Check it out here.

Every reason to get more HackerPoints™ is a good one, so today we're going to write a neat command line app in .NET Core! The Common library has a really cool package Microsoft.Extensions.CommandlineUtils to help us parse command line arguments and structure our app, but sadly it's undocumented.

No more! In this guide, we'll explore the package and write a really neat

Live Transcoding

This is a collection of working commandline examples to show how one could use FFMpeg and VLC for live transcoding of video streams. All examples have been tested on OSX 10.7.5 with FFMPeg 1.1.3 and VLC 2.0.5 in early 2013.

Documentation links

	#!/bin/bash

	# Terminate on first error
	set -e

	# Check if input file is provided
	if [ -z "$1" ]; then
	echo "Usage: $0 <input_file.pdf>"
	exit 1
	fi

	# as of godot 4.1
	_static_init
	_init
	_notification 20 Node.NOTIFICATION_SCENE_INSTANTIATED # only on instantiated scene roots
	_notification 18 Node.NOTIFICATION_PARENTED
	_enter_tree
	tree_entered signal
	_notification 27 Node.NOTIFICATION_POST_ENTER_TREE
	_ready
	ready signal

	public class Result
	{
	protected internal Result(bool isSuccess, Error error)
	{
	if (isSuccess && error != Error.None)
	{
	throw new InvalidOperationException();
	}

	if (!isSuccess && error == Error.None)

	extends Object
	class_name ResourceUtils

	# ResourceLoader is unreliable when it comes to cache.
	# Sub-resources get cached regardless of the argument passed to load function.
	# This is a workaround that generates a new file on a fly,
	# while making sure that there is no cache record for it.
	# This file is then used to load the resource, after which
	# the resource takes over the original path.
	static func load_fresh(resource_path : String) -> Resource:

	function Run-Step([string] $Description, [ScriptBlock]$script)
	{
	Write-Host -NoNewline "Loading " $Description.PadRight(20)
	& $script
	Write-Host "`u{2705}" # checkmark emoji
	}

	[console]::InputEncoding = [console]::OutputEncoding = New-Object System.Text.UTF8Encoding
	$stopwatch = [system.diagnostics.stopwatch]::StartNew()

	// Made with Amplify Shader Editor
	// Available at the Unity Asset Store - http://u3d.as/y3X
	Shader "Unlit/Directional Tint"
	{
	Properties
	{
	_MainTex("MainTex", 2D) = "white" {}
	_Color("Color", Color) = (1,1,1,1)
	_ColorA("ColorA", Color) = (1,1,1,1)
	_ColorB("ColorB", Color) = (1,1,1,1)

	#Simple instructions for using Unity3d with project rider on Ubuntu

	#1. Download and install latest .deb for Unity3d from:
	http://forum.unity3d.com/threads/unity-on-linux-release-notes-and-known-issues.350256/

	#2. Download and install the Project Rider EAP (not sure if publicly available but you
	can sign up for early access here: https://www.jetbrains.com/rider/

	#3. Open the Unity3d (.deb installs the executable at /opt/Unity/Editor/Unity )

	using UnityEngine;
	using System.Collections;
	using System.Collections.Generic;

	public static class ListExtensions
	{
	public static T PickRandom<T>(this IList<T> source)
	{
	if (source.Count == 0)
	return default(T);