Rocket example doesn't compile: can't find crate for rocket_codegen

[Boscop]

D:\3rdparty\rust-embed [master ≡]> cargo run --example rocket
←[0m←[0m←[1m←[32m    Updating←[0m registry `https://github.com/rust-lang/crates.io-index`
←[0m←[0m←[1m←[32m   Compiling←[0m winapi v0.3.5
←[0m←[0m←[1m←[32m   Compiling←[0m unicode-xid v0.0.4
←[0m←[0m←[1m←[32m   Compiling←[0m quote v0.3.15
←[0m←[0m←[1m←[32m   Compiling←[0m synom v0.11.3
←[0m←[0m←[1m←[32m   Compiling←[0m syn v0.11.11
←[0m←[0m←[1m←[32m   Compiling←[0m same-file v1.0.2
←[0m←[0m←[1m←[32m   Compiling←[0m walkdir v2.1.4
←[0m←[0m←[1m←[32m   Compiling←[0m rust-embed v3.0.0 (file:///D:/3rdparty/rust-embed)
←[0m←[1m←[38;5;9merror[E0463]←[0m←[0m←[1m←[38;5;15m: can't find crate for `rocket_codegen`←[0m
←[0m ←[0m←[0m←[1m←[38;5;14m--> ←[0m←[0mexamples\rocket.rs:2:11←[0m
←[0m  ←[0m←[0m←[1m←[38;5;14m|←[0m
←[0m←[1m←[38;5;14m2←[0m←[0m ←[0m←[0m←[1m←[38;5;14m| ←[0m←[0m#![plugin(rocket_codegen)]←[0m
←[0m  ←[0m←[0m←[1m←[38;5;14m| ←[0m←[0m          ←[0m←[0m←[1m←[38;5;9m^^^^^^^^^^^^^^←[0m←[0m ←[0m←[0m←[1m←[38;5;9mcan't f
ind crate←[0m

←[0m←[1m←[38;5;9merror←[0m←[0m←[1m←[38;5;15m: aborting due to previous error←[0m

←[0m←[1m←[38;5;15mFor more information about this error, try `rustc --explain E0463`.←[0m
←[0m←[0m←[1m←[31merror:←[0m Could not compile `rust-embed`.

To learn more, run the command again with --verbose.

[pyrossh]

What version of rust are you using? The rocket example only works on the nightly version.
You need to run this specifically
cargo +nightly run --example rocket --features nightly

[Boscop]

Ah, I had nightly but I didn't have --features nightly..
Now it works (but crashes when run from examples folder (issue 34)).

[theronic]

I can't get rust_codegen plugin working either, even on nightly rust. I get "Package myproject does not have these features: nightly"

[rsdomingues]

i've got the same error here.

cargo +nightly run --example rocket --features nightly

error: Package hero-api v0.1.0 (/Users/rodrigosd/git/rust/hero-api) does not have these features: nightly

if i try only cargo run

error: dlsym(0x7fa7b74156b0, rustc_plugin_registrar_e7907f37b0dc50ddf9d71b111db3523f): symbol not found
--> src/main.rs:5:11
|
5 | #![plugin(rocket_codegen)]
| ^^^^^^^^^^^^^^

error: aborting due to previous error

[AzureMarker]

@rsdomingues Are you executing that in this library or your own? What is hero-api?

[Oni-zerone]

@Mcat12 I had the same problem, and I think @rsdomingues is refering to this tutorial https://medium.com/sean3z/building-a-restful-crud-api-with-rust-1867308352d8
that is the first result on google searching for rust rest api.
Do you have a better documentation to share with us?

[AzureMarker]

What is the goal that you/they are trying to accomplish? It doesn't make sense to try to run another crate's examples from your own project. You need to be in the rust-embed crate to run rust-embed examples.

[web3dopamine]

@Oni-zerone

1. in Cargo.toml
   [dependencies]
rocket = "0.4.4"
rocket_codegen = "0.4.4"

2. main.rs

#![feature(proc_macro_hygiene, decl_macro)]

#[macro_use] extern crate rocket;

#[get("/<name>/<age>")]
fn hello(name: String, age: u8) -> String {
    format!("Hello, {} year old named {}!", age, name)
}

fn main() {
    rocket::ignite()
        .mount("/hello", routes![hello])
        .launch();
}

check the first two lines; its different for rocket v0.3 and v0.4

it should work now... :)

[AkhilSharma90]

@web3dopamine your solution works thanks. I wish they stuck with the old syntax (pre v0.3) for the first two lines. that made more sense