Create a new applet
This step will eventually be a
simple wasefire new <applet-name>
command out of tree. But for now we will
build the applet within the project repository as an example applet. We'll use
tutorial
as the applet name throughout this tutorial.
You have 2 options to create and populate the applet directory. We'll go over both for pedagogical reasons.
Copy the hello
applet
The first step is to copy the hello
directory to the tutorial
directory:
cp -r examples/rust/hello examples/rust/tutorial
The second step is to update the applet name in the Cargo.toml
:
sed -i 's/hello/tutorial/' examples/rust/tutorial/Cargo.toml
Create the applet from scratch
Create the tutorial
directory:
mkdir examples/rust/tutorial
Create the Cargo.toml
file in the created directory with the following
content:
[package]
name = "tutorial"
version = "0.1.0"
edition = "2021"
[dependencies]
wasefire = "*" # use the latest version
The wasefire
dependency provides a high-level interface to the Applet API.
Then create the src/lib.rs
file in the created directory with the following
content:
#![no_std] // needed for building wasm (without wasi) wasefire::applet!(); // imports the prelude and defines main as entry point fn main() { debug!("hello world"); }
Note that because you need to use core
or alloc
instead of std
.