Macro compile_time_run::run_command

macro_rules! run_command {
    #[proc_macro_hack] => { ... };
}

Run a command at compile time, and return the output as a byte slice.

The output is a static &u8, and can be used for the value of consts. If the command fails to run, a compile error is generated.

For example:

use compile_time_run::run_command;
const VALUE : &'static [u8] = run_command!("echo", "Hello World!");