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toolchain.rs
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toolchain.rs
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use dirs::{CARGO_HOME, RUSTUP_HOME, TARGET_DIR, TOOLCHAIN_DIR};
use dl;
use docker;
use errors::*;
use ex::Experiment;
use reqwest;
use run::RunCommand;
use std::env::consts::EXE_SUFFIX;
use std::fs::{self, File};
use std::io;
use std::path::{Path, PathBuf};
use std::str::FromStr;
use tempdir::TempDir;
use util;
const RUSTUP_BASE_URL: &str = "https://static.rust-lang.org/rustup/dist";
const RUST_CI_BASE_URL: &str = "https://rust-lang-ci2.s3.amazonaws.com/rustc-builds-alt";
const RUST_CI_COMPONENTS: [(&str, &str); 3] = [
("rustc", "rustc-nightly-x86_64-unknown-linux-gnu.tar.xz"),
(
"rust-std-x86_64-unknown-linux-gnu",
"rust-std-nightly-x86_64-unknown-linux-gnu.tar.xz",
),
("cargo", "cargo-nightly-x86_64-unknown-linux-gnu.tar.xz"),
];
#[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
/// A toolchain name, either a rustup channel identifier,
/// or a URL+branch+sha: `https://github.com/rust-lang/rust+master+sha`
pub enum Toolchain {
Dist(String), // rustup toolchain spec
TryBuild { sha: String },
Master { sha: String },
}
impl Toolchain {
pub fn prepare(&self) -> Result<()> {
init_rustup()?;
match *self {
Toolchain::Dist(ref toolchain) => init_toolchain_from_dist(toolchain)?,
Toolchain::Master { ref sha } | Toolchain::TryBuild { ref sha } => {
init_toolchain_from_ci(RUST_CI_BASE_URL, sha)?
}
}
Ok(())
}
}
impl ToString for Toolchain {
fn to_string(&self) -> String {
match *self {
Toolchain::Dist(ref s) => s.clone(),
Toolchain::TryBuild { ref sha } => format!("try#{}", sha),
Toolchain::Master { ref sha } => format!("master#{}", sha),
}
}
}
impl FromStr for Toolchain {
type Err = Error;
fn from_str(s: &str) -> Result<Self> {
fn get_sha(s: &str) -> Result<&str> {
if let Some(hash_idx) = s.find('#') {
let (_, sha) = s.split_at(hash_idx + 1);
Ok(sha)
} else {
Err("no sha for try toolchain".into())
}
}
if s.starts_with("try#") {
Ok(Toolchain::TryBuild {
sha: get_sha(s)?.into(),
})
} else if s.starts_with("master#") {
Ok(Toolchain::Master {
sha: get_sha(s)?.into(),
})
} else {
Ok(Toolchain::Dist(s.to_string()))
}
}
}
fn init_rustup() -> Result<()> {
fs::create_dir_all(&*CARGO_HOME)?;
fs::create_dir_all(&*RUSTUP_HOME)?;
if rustup_exists() {
update_rustup()?;
} else {
install_rustup()?;
}
Ok(())
}
fn rustup_exe() -> String {
format!("{}/bin/rustup{}", *CARGO_HOME, EXE_SUFFIX)
}
fn rustup_exists() -> bool {
Path::new(&rustup_exe()).exists()
}
fn rustup_run(name: &str, args: &[&str]) -> Result<()> {
RunCommand::new(name, args)
.env("CARGO_HOME", &*CARGO_HOME)
.env("RUSTUP_HOME", &*RUSTUP_HOME)
.run()
}
fn install_rustup() -> Result<()> {
info!("installing rustup");
let rustup_url = &format!(
"{}/{}/rustup-init{}",
RUSTUP_BASE_URL,
&util::this_target(),
EXE_SUFFIX
);
let mut response = dl::download(rustup_url).chain_err(|| "unable to download rustup")?;
let tempdir = TempDir::new("crater")?;
let installer = &tempdir.path().join(format!("rustup-init{}", EXE_SUFFIX));
{
let mut file = File::create(installer)?;
io::copy(&mut response, &mut file)?;
make_executable(installer)?;
}
// FIXME: Wish I could install rustup without installing a toolchain
util::try_hard(|| {
rustup_run(&installer.to_string_lossy(), &["-y", "--no-modify-path"])
.chain_err(|| "unable to run rustup-init")
})
}
pub fn make_executable(path: &Path) -> Result<()> {
#[cfg(windows)]
fn inner(_: &Path) -> Result<()> {
Ok(())
}
#[cfg(not(windows))]
fn inner(path: &Path) -> Result<()> {
use std::os::unix::fs::PermissionsExt;
let metadata = fs::metadata(path)?;
let mut perms = metadata.permissions();
let new_mode = (perms.mode() & !0o777) | 0o755;
perms.set_mode(new_mode);
fs::set_permissions(path, perms)?;
Ok(())
}
inner(path)
}
fn update_rustup() -> Result<()> {
info!("updating rustup");
util::try_hard(|| {
rustup_run(&rustup_exe(), &["self", "update"])
.chain_err(|| "unable to run rustup self-update")
})
}
fn init_toolchain_from_dist(toolchain: &str) -> Result<()> {
info!("installing toolchain {}", toolchain);
util::try_hard(|| {
rustup_run(&rustup_exe(), &["toolchain", "install", toolchain])
.chain_err(|| "unable to install toolchain via rustup")
})
}
fn init_toolchain_from_ci(base_url: &str, sha: &str) -> Result<()> {
info!("installing toolchain try#{}", sha);
fs::create_dir_all(&*TOOLCHAIN_DIR)?;
let dir = TOOLCHAIN_DIR.join(sha);
use rustup_dist as dist;
use rustup_dist::component::Package;
let prefix = dist::prefix::InstallPrefix::from(dir);
let target = dist::component::Components::open(prefix.clone())?;
let cfg = dist::temp::Cfg::new((&*RUSTUP_HOME).into(), RUSTUP_BASE_URL, Box::new(|_| {}));
let notifier = |_: dist::notifications::Notification| {};
let mut tx = dist::component::Transaction::new(prefix, &cfg, ¬ifier);
for &(component, file) in &RUST_CI_COMPONENTS {
if target.find(component)?.is_some() {
info!("skipping component {}, already installed", component);
continue;
};
info!("installing component {}", component);
let url = format!("{}/{}/{}", base_url, sha, file);
let response = dl::download_limit(&url, 10_000)?;
if response.status() != reqwest::StatusCode::Ok {
return Err(ErrorKind::Download.into());
}
tx = dist::component::TarXzPackage::new(response, &cfg)?.install(
&target,
component,
None,
tx,
)?;
}
tx.commit();
Ok(())
}
impl Toolchain {
pub fn rustup_name(&self) -> String {
match *self {
Toolchain::Dist(ref n) => n.to_string(),
Toolchain::TryBuild { ref sha } | Toolchain::Master { ref sha } => sha.to_string(),
}
}
}
pub fn ex_target_dir(ex_name: &str) -> PathBuf {
TARGET_DIR.join(ex_name)
}
#[derive(Copy, Clone)]
pub enum CargoState {
Locked,
Unlocked,
}
impl Toolchain {
pub fn target_dir(&self, ex_name: &str) -> PathBuf {
ex_target_dir(ex_name).join(self.to_string())
}
pub fn run_cargo(
&self,
ex: &Experiment,
source_dir: &Path,
args: &[&str],
cargo_state: CargoState,
quiet: bool,
) -> Result<()> {
let toolchain_name = self.rustup_name();
let ex_target_dir = self.target_dir(&ex.name);
fs::create_dir_all(&ex_target_dir)?;
let toolchain_arg = "+".to_string() + &toolchain_name;
let mut full_args = vec!["cargo", &*toolchain_arg];
full_args.extend_from_slice(args);
info!("running: {}", full_args.join(" "));
let perm = match cargo_state {
CargoState::Locked => docker::Perm::ReadOnly,
CargoState::Unlocked => docker::Perm::ReadWrite,
};
let rust_env = docker::RustEnv {
args: &full_args,
work_dir: (source_dir.into(), perm),
cargo_home: (Path::new(&*CARGO_HOME).into(), perm),
rustup_home: (Path::new(&*RUSTUP_HOME).into(), docker::Perm::ReadOnly),
// This is configured as CARGO_TARGET_DIR by the docker container itself
target_dir: (ex_target_dir, docker::Perm::ReadWrite),
cap_lints: &ex.cap_lints,
};
docker::run(&docker::rust_container(rust_env), quiet)
}
}