Rocket/codegen/build.rs

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Rust
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//! This tiny build script ensures that rocket_codegen is not compiled with an
//! incompatible version of rust.
extern crate yansi;
extern crate version_check;
use yansi::Color::{Red, Yellow, Blue, White};
use version_check::{supports_features, is_min_version, is_min_date};
// Specifies the minimum nightly version needed to compile Rocket's codegen.
const MIN_DATE: &'static str = "2017-06-19";
2017-05-27 03:06:01 +00:00
const MIN_VERSION: &'static str = "1.19.0-nightly";
fn main() {
let ok_channel = supports_features();
let ok_version = is_min_version(MIN_VERSION);
let ok_date = is_min_date(MIN_DATE);
let print_version_err = |version: &str, date: &str| {
eprintln!("{} {}. {} {}.",
White.paint("Installed version is:"),
Yellow.paint(format!("{} ({})", version, date)),
White.paint("Minimum required:"),
Yellow.paint(format!("{} ({})", MIN_VERSION, MIN_DATE)));
};
match (ok_channel, ok_version, ok_date) {
(Some(ok_channel), Some((ok_version, version)), Some((ok_date, date))) => {
if !ok_channel {
eprintln!("{} {}",
Red.paint("Error:").bold(),
White.paint("Rocket requires a nightly or dev version of Rust."));
print_version_err(&*version, &*date);
eprintln!("{}{}{}",
Blue.paint("See the getting started guide ("),
White.paint("https://rocket.rs/guide/getting-started/"),
Blue.paint(") for more information."));
panic!("Aborting compilation due to incompatible compiler.")
}
if !ok_version || !ok_date {
eprintln!("{} {}",
Red.paint("Error:").bold(),
White.paint("Rocket codegen requires a more recent version of rustc."));
eprintln!("{}{}{}",
Blue.paint("Use `"),
White.paint("rustup update"),
Blue.paint("` or your preferred method to update Rust."));
print_version_err(&*version, &*date);
panic!("Aborting compilation due to incompatible compiler.")
}
},
_ => {
println!("cargo:warning={}", "Rocket was unable to check rustc compatibility.");
println!("cargo:warning={}", "Build may fail due to incompatible rustc version.");
}
}
}