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# rustc_tools_util
A small tool to help you generate version information
for packages installed from a git repo
## Usage
Add a `build.rs` file to your repo and list it in `Cargo.toml`
````
build = "build.rs"
````
List rustc_tools_util as regular AND build dependency.
````
[dependencies]
rustc_tools_util = "0.1"
[build-dependencies]
rustc_tools_util = "0.1"
````
In `build.rs`, generate the data in your `main()`
````rust
fn main() {
println!(
"cargo:rustc-env=GIT_HASH={}",
rustc_tools_util::get_commit_hash().unwrap_or_default()
);
println!(
"cargo:rustc-env=COMMIT_DATE={}",
rustc_tools_util::get_commit_date().unwrap_or_default()
);
println!(
"cargo:rustc-env=RUSTC_RELEASE_CHANNEL={}",
rustc_tools_util::get_channel().unwrap_or_default()
);
}
````
Use the version information in your main.rs
````rust
use rustc_tools_util::*;
fn show_version() {
let version_info = rustc_tools_util::get_version_info!();
println!("{}", version_info);
}
````
This gives the following output in clippy:
`clippy 0.0.212 (a416c5e 2018-12-14)`
## License
Copyright 2014-2019 The Rust Project Developers
Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
<LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
option. All files in the project carrying such notice may not be
copied, modified, or distributed except according to those terms.
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