Remove no longer required dependencies

With the update to rand 0.6.4 we no longer require the dependencies to
rustc_version, semver, and semver-parser. Hence, this change removes
them.

Delete subrepo rustc_version/:rustc_version
Delete subrepo semver/:semver
Delete subrepo semver-parser/:semver-parser

2 files changed, 0 insertions, 426 deletions

diff --git a/rustc_version/src/errors.rs b/rustc_version/src/errors.rs
deleted file mode 100644
index 54557b6..0000000
--- a/rustc_version/src/errors.rs
+++ /dev/null
@@ -1,79 +0,0 @@
-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>;
diff --git a/rustc_version/src/lib.rs b/rustc_version/src/lib.rs
deleted file mode 100644
index c038288..0000000
--- a/rustc_version/src/lib.rs
+++ /dev/null
@@ -1,347 +0,0 @@
-// 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!();
-
-}
-*/