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John Doty 2024-03-08 11:03:01 -08:00
parent 5deceec006
commit 977e3c17e5
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79
third-party/vendor/rustc_version/src/errors.rs vendored Normal file
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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>;

347
third-party/vendor/rustc_version/src/lib.rs vendored Normal file
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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!();
}
*/