is it possible to prepare a recording and run it automatically?

[amtoine]

hello there 👋

i was having a look at the NixOS website, when i stumbled upon their tutorials...
they definitely use asciinema to record these (see the .cast files in the HTML source and the asciinema in the page anchors)

the thing is they achieve a gorgious effect in their tutorials

have a look at https://nixos.org/#asciinema-demo-cover

all the characters are typed perfectly, without any hesitation 😮
there are two options i think 🤔

1. the person recording these tutorials is amazing
2. they use a feature of asciinema i do not know about or a script to record these

👉 how is it possible to achieve this effect? 😋

i did not see anything in the --help of asciinema 😕

an idea of how that could be achieved

is it possible to write a "script" and let asciinema run it automatically?
for instance, the video above could be coded as

# Hi!
# Wondering how to start using Nix?
# Here are a few examples:
clear
$ node -e "console.log(1+1)"
# Interesting, no node on this machine
...

where the lines starting with # will be comments in the recording, $ will be commands typed by the "user" and clear is the special command clearing the screen.