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Ensure minimum rustc version in a build script. r=nalexander (#326)
Printing out failure to meet rustc version helps users during setup with a helpful message if using an older rustc. Rust version checking from http://stackoverflow.com/a/36607492.
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// Copyright 2016 Mozilla | ||
// | ||
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use | ||
// this file except in compliance with the License. You may obtain a copy of the | ||
// License at http://www.apache.org/licenses/LICENSE-2.0 | ||
// Unless required by applicable law or agreed to in writing, software distributed | ||
// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR | ||
// CONDITIONS OF ANY KIND, either express or implied. See the License for the | ||
// specific language governing permissions and limitations under the License. | ||
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extern crate rustc_version; | ||
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use std::io::{self, Write}; | ||
use std::process::exit; | ||
use rustc_version::version_matches; | ||
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/// MIN_VERSION should be changed when there's a new minimum version of rustc required | ||
/// to build the project. | ||
static MIN_VERSION: &'static str = ">= 1.15.1"; | ||
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fn main() { | ||
if !version_matches(MIN_VERSION) { | ||
writeln!(&mut io::stderr(), "Mentat requires rustc {}", MIN_VERSION).unwrap(); | ||
exit(1); | ||
} | ||
} |