Section III - Creating an Executable

Although this package was created as a library, we can make it dual binary and library by doing the following:

1. Modify the Cargo.toml file to point to a binary during build time

[[bin]]
name = "hello_world"
path = "src/bin/hello-world.rs"

1. Create a new bin folder in the src directory

2. Create a new file hello-world.rs in the bin directory with the following code

pub fn main() {
    println!("Hello World");
}

1. Build and run the package

ArchConfWorkshopUser:~/environment/rust-daas (master) $ cargo run
   Compiling rust-daas v0.1.0 (/home/ec2-user/environment/rust-daas)
    Finished dev [unoptimized + debuginfo] target(s) in 0.35s
     Running `target/debug/hello_world`
Hello World

There should now be an executable named hello_world in the /target/debug directory which you can execute directly.

ArchConfWorkshopUser:~/environment/rust-daas (master) $ cd ./target/debug/
ArchConfWorkshopUser:~/environment/rust-daas/target/debug (master) $ ./hello_world 
Hello World