mirror of
https://github.com/rust-lang/cargo
synced 2024-10-14 03:32:39 +00:00
646e9a0b9e
Support inheriting jobserver fd for external subcommands
247 lines
5.6 KiB
Rust
247 lines
5.6 KiB
Rust
//! Tests for the jobserver protocol.
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use cargo_util::is_ci;
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use std::net::TcpListener;
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use std::process::Command;
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use std::thread;
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use cargo_test_support::install::{assert_has_installed_exe, cargo_home};
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use cargo_test_support::{cargo_exe, project};
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const EXE_CONTENT: &str = r#"
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use std::env;
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fn main() {
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let var = env::var("CARGO_MAKEFLAGS").unwrap();
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let arg = var.split(' ')
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.find(|p| p.starts_with("--jobserver"))
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.unwrap();
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let val = &arg[arg.find('=').unwrap() + 1..];
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validate(val);
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}
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#[cfg(unix)]
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fn validate(s: &str) {
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use std::fs::File;
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use std::io::*;
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use std::os::unix::prelude::*;
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let fds = s.split(',').collect::<Vec<_>>();
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println!("{}", s);
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assert_eq!(fds.len(), 2);
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unsafe {
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let mut read = File::from_raw_fd(fds[0].parse().unwrap());
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let mut write = File::from_raw_fd(fds[1].parse().unwrap());
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let mut buf = [0];
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assert_eq!(read.read(&mut buf).unwrap(), 1);
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assert_eq!(write.write(&buf).unwrap(), 1);
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}
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}
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#[cfg(windows)]
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fn validate(_: &str) {
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// a little too complicated for a test...
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}
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"#;
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#[cargo_test]
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fn jobserver_exists() {
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let p = project()
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.file("build.rs", EXE_CONTENT)
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.file("src/lib.rs", "")
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.build();
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// Explicitly use `-j2` to ensure that there's eventually going to be a
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// token to read from `validate` above, since running the build script
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// itself consumes a token.
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p.cargo("build -j2").run();
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}
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#[cargo_test]
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fn external_subcommand_inherits_jobserver() {
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let make = if cfg!(windows) {
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"mingw32-make"
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} else {
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"make"
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};
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if Command::new(make).arg("--version").output().is_err() {
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return;
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}
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let name = "cargo-jobserver-check";
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let p = project()
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.file(
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"Cargo.toml",
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&format!(
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r#"
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[package]
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name = "{name}"
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version = "0.0.1"
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"#
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),
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)
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.file("src/main.rs", EXE_CONTENT)
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.file(
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"Makefile",
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"\
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all:
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\t+$(CARGO) jobserver-check
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",
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)
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.build();
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p.cargo("install --path .").run();
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assert_has_installed_exe(cargo_home(), name);
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p.process(make).env("CARGO", cargo_exe()).arg("-j2").run();
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}
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#[cargo_test]
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fn makes_jobserver_used() {
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let make = if cfg!(windows) {
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"mingw32-make"
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} else {
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"make"
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};
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if !is_ci() && Command::new(make).arg("--version").output().is_err() {
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return;
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}
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let p = project()
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.file(
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"Cargo.toml",
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r#"
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[package]
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name = "foo"
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version = "0.0.1"
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authors = []
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[dependencies]
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d1 = { path = "d1" }
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d2 = { path = "d2" }
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d3 = { path = "d3" }
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"#,
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)
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.file("src/lib.rs", "")
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.file(
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"d1/Cargo.toml",
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r#"
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[package]
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name = "d1"
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version = "0.0.1"
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authors = []
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build = "../dbuild.rs"
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"#,
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)
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.file("d1/src/lib.rs", "")
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.file(
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"d2/Cargo.toml",
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r#"
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[package]
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name = "d2"
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version = "0.0.1"
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authors = []
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build = "../dbuild.rs"
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"#,
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)
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.file("d2/src/lib.rs", "")
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.file(
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"d3/Cargo.toml",
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r#"
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[package]
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name = "d3"
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version = "0.0.1"
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authors = []
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build = "../dbuild.rs"
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"#,
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)
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.file("d3/src/lib.rs", "")
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.file(
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"dbuild.rs",
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r#"
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use std::net::TcpStream;
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use std::env;
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use std::io::Read;
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fn main() {
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let addr = env::var("ADDR").unwrap();
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let mut stream = TcpStream::connect(addr).unwrap();
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let mut v = Vec::new();
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stream.read_to_end(&mut v).unwrap();
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}
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"#,
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)
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.file(
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"Makefile",
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"\
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all:
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\t+$(CARGO) build
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",
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)
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.build();
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let l = TcpListener::bind("127.0.0.1:0").unwrap();
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let addr = l.local_addr().unwrap();
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let child = thread::spawn(move || {
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let a1 = l.accept().unwrap();
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let a2 = l.accept().unwrap();
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l.set_nonblocking(true).unwrap();
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for _ in 0..1000 {
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assert!(l.accept().is_err());
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thread::yield_now();
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}
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drop(a1);
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l.set_nonblocking(false).unwrap();
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let a3 = l.accept().unwrap();
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drop((a2, a3));
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});
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p.process(make)
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.env("CARGO", cargo_exe())
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.env("ADDR", addr.to_string())
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.arg("-j2")
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.run();
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child.join().unwrap();
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}
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#[cargo_test]
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fn jobserver_and_j() {
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let make = if cfg!(windows) {
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"mingw32-make"
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} else {
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"make"
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};
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if !is_ci() && Command::new(make).arg("--version").output().is_err() {
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return;
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}
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let p = project()
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.file("src/lib.rs", "")
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.file(
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"Makefile",
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"\
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all:
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\t+$(CARGO) build -j2
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",
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)
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.build();
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p.process(make)
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.env("CARGO", cargo_exe())
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.arg("-j2")
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.with_stderr(
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"\
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warning: a `-j` argument was passed to Cargo but Cargo is also configured \
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with an external jobserver in its environment, ignoring the `-j` parameter
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[COMPILING] [..]
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[FINISHED] [..]
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",
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)
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.run();
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}
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