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{"files":{"Cargo.toml":"80b9fb136c8c2945b4875b05b0f5a4b11e4722997e751f17d8d3f241d7c684db","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"c9a75f18b9ab2927829a208fc6aa2cf4e63b8420887ba29cdb265d6619ae82d5","README.md":"58bd14a1dfa1d828e6e99f35c3b7c2149d08e2d990d6ca93f92ab8ffb43275b7","src/errors.rs":"b28c2eeb1278fc3e8d68a64b177034faed67f6762335729d3a6d1e61be8fb034","src/lib.rs":"92a32673f77961724bc52b872781f06d22d166f06838c9582c5adae3c5214f51"},"package":"138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"}

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# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
#
# When uploading crates to the registry Cargo will automatically
# "normalize" Cargo.toml files for maximal compatibility
# with all versions of Cargo and also rewrite `path` dependencies
# to registry (e.g. crates.io) dependencies
#
# If you believe there's an error in this file please file an
# issue against the rust-lang/cargo repository. If you're
# editing this file be aware that the upstream Cargo.toml
# will likely look very different (and much more reasonable)
[package]
name = "rustc_version"
version = "0.2.3"
authors = ["Marvin Löbel <loebel.marvin@gmail.com>"]
description = "A library for querying the version of a installed rustc compiler"
documentation = "https://docs.rs/rustc_version/"
readme = "README.md"
keywords = ["version", "rustc"]
license = "MIT/Apache-2.0"
repository = "https://github.com/Kimundi/rustc-version-rs"
[dependencies.semver]
version = "0.9"
[badges.travis-ci]
repository = "Kimundi/rustc-version-rs"

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Copyright (c) 2016 The Rust Project Developers
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rustc-version-rs
==============
A library for querying the version of a `rustc` compiler.
This can be used by build scripts or other tools dealing with Rust sources
to make decisions based on the version of the compiler.
[![Travis-CI Status](https://travis-ci.org/Kimundi/rustc-version-rs.png?branch=master)](https://travis-ci.org/Kimundi/rustc-version-rs)
# Getting Started
[rustc-version-rs is available on crates.io](https://crates.io/crates/rustc_version).
It is recommended to look there for the newest released version, as well as links to the newest builds of the docs.
At the point of the last update of this README, the latest published version could be used like this:
Add the following dependency to your Cargo manifest...
```toml
[build-dependencies]
rustc_version = "0.2"
```
...and see the [docs](http://kimundi.github.io/rustc-version-rs/rustc_version/index.html) for how to use it.
# Example
```rust
// This could be a cargo build script
extern crate rustc_version;
use rustc_version::{version, version_meta, Channel, Version};
fn main() {
// Assert we haven't travelled back in time
assert!(version().unwrap().major >= 1);
// Set cfg flags depending on release channel
match version_meta().unwrap().channel {
Channel::Stable => {
println!("cargo:rustc-cfg=RUSTC_IS_STABLE");
}
Channel::Beta => {
println!("cargo:rustc-cfg=RUSTC_IS_BETA");
}
Channel::Nightly => {
println!("cargo:rustc-cfg=RUSTC_IS_NIGHTLY");
}
Channel::Dev => {
println!("cargo:rustc-cfg=RUSTC_IS_DEV");
}
}
// Check for a minimum version
if version().unwrap() >= Version::parse("1.4.0").unwrap() {
println!("cargo:rustc-cfg=compiler_has_important_bugfix");
}
}
```
## License
Licensed under either of
* Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
* MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
at your option.
### Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any
additional terms or conditions.

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use std::{self, error, fmt, io, str};
use semver::{self, Identifier};
/// The error type for this crate.
#[derive(Debug)]
pub enum Error {
/// An error ocurrend when executing the `rustc` command.
CouldNotExecuteCommand(io::Error),
/// The output of `rustc -vV` was not valid utf-8.
Utf8Error(str::Utf8Error),
/// The output of `rustc -vV` was not in the expected format.
UnexpectedVersionFormat,
/// An error ocurred in parsing a `VersionReq`.
ReqParseError(semver::ReqParseError),
/// An error ocurred in parsing the semver.
SemVerError(semver::SemVerError),
/// The pre-release tag is unknown.
UnknownPreReleaseTag(Identifier),
}
use Error::*;
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use std::error::Error;
match *self {
CouldNotExecuteCommand(ref e) => write!(f, "{}: {}", self.description(), e),
Utf8Error(_) => write!(f, "{}", self.description()),
UnexpectedVersionFormat => write!(f, "{}", self.description()),
ReqParseError(ref e) => write!(f, "{}: {}", self.description(), e),
SemVerError(ref e) => write!(f, "{}: {}", self.description(), e),
UnknownPreReleaseTag(ref i) => write!(f, "{}: {}", self.description(), i),
}
}
}
impl error::Error for Error {
fn cause(&self) -> Option<&error::Error> {
match *self {
CouldNotExecuteCommand(ref e) => Some(e),
Utf8Error(ref e) => Some(e),
UnexpectedVersionFormat => None,
ReqParseError(ref e) => Some(e),
SemVerError(ref e) => Some(e),
UnknownPreReleaseTag(_) => None,
}
}
fn description(&self) -> &str {
match *self {
CouldNotExecuteCommand(_) => "could not execute command",
Utf8Error(_) => "invalid UTF-8 output from `rustc -vV`",
UnexpectedVersionFormat => "unexpected `rustc -vV` format",
ReqParseError(_) => "error parsing version requirement",
SemVerError(_) => "error parsing version",
UnknownPreReleaseTag(_) => "unknown pre-release tag",
}
}
}
macro_rules! impl_from {
($($err_ty:ty => $variant:ident),* $(,)*) => {
$(
impl From<$err_ty> for Error {
fn from(e: $err_ty) -> Error {
Error::$variant(e)
}
}
)*
}
}
impl_from! {
str::Utf8Error => Utf8Error,
semver::SemVerError => SemVerError,
semver::ReqParseError => ReqParseError,
}
/// The result type for this crate.
pub type Result<T> = std::result::Result<T, Error>;

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// Copyright 2016 rustc-version-rs 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. This file may not be copied, modified, or distributed
// except according to those terms.
#![warn(missing_docs)]
//! Simple library for getting the version information of a `rustc`
//! compiler.
//!
//! This can be used by build scripts or other tools dealing with Rust sources
//! to make decisions based on the version of the compiler.
//!
//! It calls `$RUSTC --version -v` and parses the output, falling
//! back to `rustc` if `$RUSTC` is not set.
//!
//! # Example
//!
//! ```rust
//! // This could be a cargo build script
//!
//! extern crate rustc_version;
//! use rustc_version::{version, version_meta, Channel, Version};
//!
//! fn main() {
//! // Assert we haven't travelled back in time
//! assert!(version().unwrap().major >= 1);
//!
//! // Set cfg flags depending on release channel
//! match version_meta().unwrap().channel {
//! Channel::Stable => {
//! println!("cargo:rustc-cfg=RUSTC_IS_STABLE");
//! }
//! Channel::Beta => {
//! println!("cargo:rustc-cfg=RUSTC_IS_BETA");
//! }
//! Channel::Nightly => {
//! println!("cargo:rustc-cfg=RUSTC_IS_NIGHTLY");
//! }
//! Channel::Dev => {
//! println!("cargo:rustc-cfg=RUSTC_IS_DEV");
//! }
//! }
//!
//! // Check for a minimum version
//! if version().unwrap() >= Version::parse("1.4.0").unwrap() {
//! println!("cargo:rustc-cfg=compiler_has_important_bugfix");
//! }
//! }
//! ```
extern crate semver;
use semver::Identifier;
use std::process::Command;
use std::{env, str};
use std::ffi::OsString;
// Convenience re-export to allow version comparison without needing to add
// semver crate.
pub use semver::Version;
mod errors;
pub use errors::{Error, Result};
/// Release channel of the compiler.
#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug)]
pub enum Channel {
/// Development release channel
Dev,
/// Nightly release channel
Nightly,
/// Beta release channel
Beta,
/// Stable release channel
Stable,
}
/// Rustc version plus metada like git short hash and build date.
#[derive(Clone, Debug, Eq, PartialEq, Ord, PartialOrd, Hash)]
pub struct VersionMeta {
/// Version of the compiler
pub semver: Version,
/// Git short hash of the build of the compiler
pub commit_hash: Option<String>,
/// Commit date of the compiler
pub commit_date: Option<String>,
/// Build date of the compiler; this was removed between Rust 1.0.0 and 1.1.0.
pub build_date: Option<String>,
/// Release channel of the compiler
pub channel: Channel,
/// Host target triple of the compiler
pub host: String,
/// Short version string of the compiler
pub short_version_string: String,
}
impl VersionMeta {
/// Returns the version metadata for `cmd`, which should be a `rustc` command.
pub fn for_command(cmd: Command) -> Result<VersionMeta> {
let mut cmd = cmd;
let out = cmd.arg("-vV").output().map_err(Error::CouldNotExecuteCommand)?;
let out = str::from_utf8(&out.stdout)?;
version_meta_for(out)
}
}
/// Returns the `rustc` SemVer version.
pub fn version() -> Result<Version> {
Ok(version_meta()?.semver)
}
/// Returns the `rustc` SemVer version and additional metadata
/// like the git short hash and build date.
pub fn version_meta() -> Result<VersionMeta> {
let cmd = env::var_os("RUSTC").unwrap_or_else(|| OsString::from("rustc"));
VersionMeta::for_command(Command::new(cmd))
}
/// Parses a "rustc -vV" output string and returns
/// the SemVer version and additional metadata
/// like the git short hash and build date.
pub fn version_meta_for(verbose_version_string: &str) -> Result<VersionMeta> {
let out: Vec<_> = verbose_version_string.lines().collect();
if !(out.len() >= 6 && out.len() <= 8) {
return Err(Error::UnexpectedVersionFormat);
}
let short_version_string = out[0];
fn expect_prefix<'a>(line: &'a str, prefix: &str) -> Result<&'a str> {
if line.starts_with(prefix) {
Ok(&line[prefix.len()..])
} else {
Err(Error::UnexpectedVersionFormat)
}
}
let commit_hash = match expect_prefix(out[2], "commit-hash: ")? {
"unknown" => None,
hash => Some(hash.to_owned()),
};
let commit_date = match expect_prefix(out[3], "commit-date: ")? {
"unknown" => None,
hash => Some(hash.to_owned()),
};
// Handle that the build date may or may not be present.
let mut idx = 4;
let mut build_date = None;
if out[idx].starts_with("build-date") {
build_date = match expect_prefix(out[idx], "build-date: ")? {
"unknown" => None,
s => Some(s.to_owned()),
};
idx += 1;
}
let host = expect_prefix(out[idx], "host: ")?;
idx += 1;
let release = expect_prefix(out[idx], "release: ")?;
let semver: Version = release.parse()?;
let channel = if semver.pre.is_empty() {
Channel::Stable
} else {
match semver.pre[0] {
Identifier::AlphaNumeric(ref s) if s == "dev" => Channel::Dev,
Identifier::AlphaNumeric(ref s) if s == "beta" => Channel::Beta,
Identifier::AlphaNumeric(ref s) if s == "nightly" => Channel::Nightly,
ref x => return Err(Error::UnknownPreReleaseTag(x.clone())),
}
};
Ok(VersionMeta {
semver: semver,
commit_hash: commit_hash,
commit_date: commit_date,
build_date: build_date,
channel: channel,
host: host.into(),
short_version_string: short_version_string.into(),
})
}
#[test]
fn smoketest() {
let v = version().unwrap();
assert!(v.major >= 1);
let v = version_meta().unwrap();
assert!(v.semver.major >= 1);
assert!(version().unwrap() >= Version::parse("1.0.0").unwrap());
}
#[test]
fn parse_unexpected() {
let res = version_meta_for(
"rustc 1.0.0 (a59de37e9 2015-05-13) (built 2015-05-14)
binary: rustc
commit-hash: a59de37e99060162a2674e3ff45409ac73595c0e
commit-date: 2015-05-13
rust-birthday: 2015-05-14
host: x86_64-unknown-linux-gnu
release: 1.0.0");
assert!(match res {
Err(Error::UnexpectedVersionFormat) => true,
_ => false,
});
}
#[test]
fn parse_1_0_0() {
let version = version_meta_for(
"rustc 1.0.0 (a59de37e9 2015-05-13) (built 2015-05-14)
binary: rustc
commit-hash: a59de37e99060162a2674e3ff45409ac73595c0e
commit-date: 2015-05-13
build-date: 2015-05-14
host: x86_64-unknown-linux-gnu
release: 1.0.0").unwrap();
assert_eq!(version.semver, Version::parse("1.0.0").unwrap());
assert_eq!(version.commit_hash, Some("a59de37e99060162a2674e3ff45409ac73595c0e".into()));
assert_eq!(version.commit_date, Some("2015-05-13".into()));
assert_eq!(version.build_date, Some("2015-05-14".into()));
assert_eq!(version.channel, Channel::Stable);
assert_eq!(version.host, "x86_64-unknown-linux-gnu");
assert_eq!(version.short_version_string, "rustc 1.0.0 (a59de37e9 2015-05-13) (built 2015-05-14)");
}
#[test]
fn parse_unknown() {
let version = version_meta_for(
"rustc 1.3.0
binary: rustc
commit-hash: unknown
commit-date: unknown
host: x86_64-unknown-linux-gnu
release: 1.3.0").unwrap();
assert_eq!(version.semver, Version::parse("1.3.0").unwrap());
assert_eq!(version.commit_hash, None);
assert_eq!(version.commit_date, None);
assert_eq!(version.channel, Channel::Stable);
assert_eq!(version.host, "x86_64-unknown-linux-gnu");
assert_eq!(version.short_version_string, "rustc 1.3.0");
}
#[test]
fn parse_nightly() {
let version = version_meta_for(
"rustc 1.5.0-nightly (65d5c0833 2015-09-29)
binary: rustc
commit-hash: 65d5c083377645a115c4ac23a620d3581b9562b6
commit-date: 2015-09-29
host: x86_64-unknown-linux-gnu
release: 1.5.0-nightly").unwrap();
assert_eq!(version.semver, Version::parse("1.5.0-nightly").unwrap());
assert_eq!(version.commit_hash, Some("65d5c083377645a115c4ac23a620d3581b9562b6".into()));
assert_eq!(version.commit_date, Some("2015-09-29".into()));
assert_eq!(version.channel, Channel::Nightly);
assert_eq!(version.host, "x86_64-unknown-linux-gnu");
assert_eq!(version.short_version_string, "rustc 1.5.0-nightly (65d5c0833 2015-09-29)");
}
#[test]
fn parse_stable() {
let version = version_meta_for(
"rustc 1.3.0 (9a92aaf19 2015-09-15)
binary: rustc
commit-hash: 9a92aaf19a64603b02b4130fe52958cc12488900
commit-date: 2015-09-15
host: x86_64-unknown-linux-gnu
release: 1.3.0").unwrap();
assert_eq!(version.semver, Version::parse("1.3.0").unwrap());
assert_eq!(version.commit_hash, Some("9a92aaf19a64603b02b4130fe52958cc12488900".into()));
assert_eq!(version.commit_date, Some("2015-09-15".into()));
assert_eq!(version.channel, Channel::Stable);
assert_eq!(version.host, "x86_64-unknown-linux-gnu");
assert_eq!(version.short_version_string, "rustc 1.3.0 (9a92aaf19 2015-09-15)");
}
#[test]
fn parse_1_16_0_nightly() {
let version = version_meta_for(
"rustc 1.16.0-nightly (5d994d8b7 2017-01-05)
binary: rustc
commit-hash: 5d994d8b7e482e87467d4a521911477bd8284ce3
commit-date: 2017-01-05
host: x86_64-unknown-linux-gnu
release: 1.16.0-nightly
LLVM version: 3.9").unwrap();
assert_eq!(version.semver, Version::parse("1.16.0-nightly").unwrap());
assert_eq!(version.commit_hash, Some("5d994d8b7e482e87467d4a521911477bd8284ce3".into()));
assert_eq!(version.commit_date, Some("2017-01-05".into()));
assert_eq!(version.channel, Channel::Nightly);
assert_eq!(version.host, "x86_64-unknown-linux-gnu");
assert_eq!(version.short_version_string, "rustc 1.16.0-nightly (5d994d8b7 2017-01-05)");
}
/*
#[test]
fn version_matches_replacement() {
let f = |s1: &str, s2: &str| {
let a = Version::parse(s1).unwrap();
let b = Version::parse(s2).unwrap();
println!("{} <= {} : {}", s1, s2, a <= b);
};
println!();
f("1.5.0", "1.5.0");
f("1.5.0-nightly", "1.5.0");
f("1.5.0", "1.5.0-nightly");
f("1.5.0-nightly", "1.5.0-nightly");
f("1.5.0", "1.6.0");
f("1.5.0-nightly", "1.6.0");
f("1.5.0", "1.6.0-nightly");
f("1.5.0-nightly", "1.6.0-nightly");
panic!();
}
*/