找不到指定的过程。 （操作系统错误127）-＃！[plugin（rocket_codegen）]

Question

我是Rust编程的新手，正在构建Rust + Diesel + Rocket框架。

当我运行命令cargo check或cargo run时，发生以下错误：

The specified procedure could not be found. (os error 127)
--> src\main.rs:2:11
|
2 | #![plugin(rocket_codegen)]

操作系统：Windows 10

cargo.toml

[package]
name = "rest_in_rust"
version = "0.1.0"
authors = ["venka"]

[dependencies]
diesel = { version = "1.0.0", features = ["postgres"]}
dotenv = "0.9.0"
r2d2 = "0.8.3"
serde = "1.0.80"
serde_derive = "1.0.80"
serde_json = "1.0.33"

rocket = {  git = "https://github.com/SergioBenitez/Rocket" }
rocket_codegen = {  git = "https://github.com/SergioBenitez/Rocket" }
rocket_contrib = {  git = "https://github.com/SergioBenitez/Rocket", default-features = false, features = ["json"] }

Rust版本：rustc 1.32.0-nightly（0c999ed13 2018-12-03）

main.rs文件（第二行引发此错误）任何线索吗？

 #![feature(plugin, custom_derive, const_fn, decl_macro)]
 #![plugin(rocket_codegen)]

 #[macro_use]
 extern crate diesel;
 extern crate dotenv;
 extern crate r2d2;
 extern crate rocket;
 extern crate rocket_contrib;
 #[macro_use]
 extern crate serde_derive;
 #[macro_use]
 extern crate serde_json;

 use dotenv::dotenv;
 use std::env;
 use diesel::prelude::*;
 use diesel::pg::PgConnection;

 mod schema;
 mod models;
 mod db;
 mod static_file;

Answer 1

我的 Cargo.toml 有

rocket = { git = "https://github.com/SergioBenitez/Rocket" }
rocket_codegen = { git = "https://github.com/SergioBenitez/Rocket" }

将提取最新版本。对我来说，它的价格是火箭0.4.0。从Rocket 0.4开始， rocket_codegen 不应直接依赖。

只需将其删除：

Cargo.toml

[dependencies]
rocket = "0.4"

main.rs

#![feature(proc_macro_hygiene, decl_macro)]
#[macro_use] extern crate rocket;

请检查Rocket Documentation的新闻部分中的更改日志。