What is this for?

Making scripts that work on a freshly setup PC (no prerequisites/manual dependencies)

How do I use it?

1. Write a deno script, lets call it example.js
   

console.log("Hello World")

1. Install guillotine
   

deno install -Af https://deno.land/x/deno_guillotine@0.0.4/main/deno-guillotine.js

1. Make your script portable
   

deno-guillotine ./example.js
# if you have a particular version of deno you want to use, include it as the second argument
deno-guillotine ./example.js 1.24.3

1. Profit
   It will generate two files. One with no extension, and one with a .ps1 extension. One file is a shortcut to the other. Typing ./example will run the file with a specific version of deno, and if the user doesn’t have that version its downloaded automatically. This script also does not modify the user’s PATH, so it will never override their version of deno if they have one. Technically only the .ps1 file is needed and running ./example.ps1 will work on all platforms, but obviously typing that extra .ps1 is ugly. Which is why the extra file is generated as well to make the ./example work cross platform.

How does it work?

Magic. The generated script is valid powershell, bash, and JavaScript all at the same time, which is what allows it to run cross-platform. I wrote out an explaination here that covers the basics, and I may write more in time.