extern crate ansi_term;
extern crate peg;
extern crate version_check;
use ansi_term::Color::{Red, Yellow, Blue, White};
use version_check::is_min_version;
const MIN_VERSION: &'static str = "1.17.0";
macro_rules! printerr {
($($arg:tt)*) => ({
use std::io::prelude::*;
write!(&mut ::std::io::stderr(), "{}\n", format_args!($($arg)*))
.expect("Failed to write to stderr.")
})
}
fn main() {
let print_version_err = |version: &str| {
printerr!("{} {}. {} {}.",
White.paint("Installed version is:"),
Yellow.paint(format!("{}", version)),
White.paint("Minimum required:"),
Yellow.paint(format!("{}", MIN_VERSION)));
};
match is_min_version(MIN_VERSION) {
Some((is_minimum, _)) if is_minimum => (), Some((_, ref version_string)) => {
printerr!("{} {}",
Red.bold().paint("Error:"),
White.paint("Ion requires at least version 1.17.0 to build."));
print_version_err(&*version_string);
printerr!("{}{}{}",
Blue.paint("Use `"),
White.paint("rustup update"),
Blue.paint("` to update to the latest stable compiler."));
panic!("Aborting compilation due to incompatible compiler.")
},
_ => {
println!("cargo:warning={}", "Ion was unable to check rustc compatibility.");
println!("cargo:warning={}", "Build may fail due to incompatible rustc version.");
}
}
peg::cargo_build("src/parser/grammar.rustpeg");
}