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#![allow(dead_code)]
use std::env;
use std::ffi::{OsStr, OsString};
use std::fs::{self, File};
use std::io;
use std::io::prelude::*;
use std::path::{Path, PathBuf};
use cc;
use tempfile::{Builder, TempDir};
pub struct Test {
pub td: TempDir,
pub gcc: PathBuf,
pub msvc: bool,
}
pub struct Execution {
args: Vec<String>,
}
impl Test {
pub fn new() -> Test {
// This is ugly: `sccache` needs to introspect the compiler it is
// executing, as it adjusts its behavior depending on the
// language/compiler. This crate's test driver uses mock compilers that
// are obviously not supported by sccache, so the tests fail if
// RUSTC_WRAPPER is set. rust doesn't build test dependencies with
// the `test` feature enabled, so we can't conditionally disable the
// usage of `sccache` if running in a test environment, at least not
// without setting an environment variable here and testing for it
// there. Explicitly deasserting RUSTC_WRAPPER here seems to be the
// lesser of the two evils.
env::remove_var("RUSTC_WRAPPER");
let mut gcc = PathBuf::from(env::current_exe().unwrap());
gcc.pop();
if gcc.ends_with("deps") {
gcc.pop();
}
let td = Builder::new().prefix("gcc-test").tempdir_in(&gcc).unwrap();
gcc.push(format!("gcc-shim{}", env::consts::EXE_SUFFIX));
Test {
td: td,
gcc: gcc,
msvc: false,
}
}
pub fn gnu() -> Test {
let t = Test::new();
t.shim("cc").shim("c++").shim("ar");
t
}
pub fn msvc() -> Test {
let mut t = Test::new();
t.shim("cl").shim("lib.exe");
t.msvc = true;
t
}
pub fn shim(&self, name: &str) -> &Test {
let name = if name.ends_with(env::consts::EXE_SUFFIX) {
name.to_string()
} else {
format!("{}{}", name, env::consts::EXE_SUFFIX)
};
link_or_copy(&self.gcc, self.td.path().join(name)).unwrap();
self
}
pub fn gcc(&self) -> cc::Build {
let mut cfg = cc::Build::new();
let target = if self.msvc {
"x86_64-pc-windows-msvc"
} else {
"x86_64-unknown-linux-gnu"
};
cfg.target(target)
.host(target)
.opt_level(2)
.debug(false)
.out_dir(self.td.path())
.__set_env("PATH", self.path())
.__set_env("GCCTEST_OUT_DIR", self.td.path());
if self.msvc {
cfg.compiler(self.td.path().join("cl"));
cfg.archiver(self.td.path().join("lib.exe"));
}
cfg
}
fn path(&self) -> OsString {
let mut path = env::split_paths(&env::var_os("PATH").unwrap()).collect::<Vec<_>>();
path.insert(0, self.td.path().to_owned());
env::join_paths(path).unwrap()
}
pub fn cmd(&self, i: u32) -> Execution {
let mut s = String::new();
File::open(self.td.path().join(format!("out{}", i)))
.unwrap()
.read_to_string(&mut s)
.unwrap();
Execution {
args: s.lines().map(|s| s.to_string()).collect(),
}
}
}
impl Execution {
pub fn must_have<P: AsRef<OsStr>>(&self, p: P) -> &Execution {
if !self.has(p.as_ref()) {
panic!("didn't find {:?} in {:?}", p.as_ref(), self.args);
} else {
self
}
}
pub fn must_not_have<P: AsRef<OsStr>>(&self, p: P) -> &Execution {
if self.has(p.as_ref()) {
panic!("found {:?}", p.as_ref());
} else {
self
}
}
pub fn has(&self, p: &OsStr) -> bool {
self.args.iter().any(|arg| OsStr::new(arg) == p)
}
pub fn must_have_in_order(&self, before: &str, after: &str) -> &Execution {
let before_position = self
.args
.iter()
.rposition(|x| OsStr::new(x) == OsStr::new(before));
let after_position = self
.args
.iter()
.rposition(|x| OsStr::new(x) == OsStr::new(after));
match (before_position, after_position) {
(Some(b), Some(a)) if b < a => {}
(b, a) => panic!(
"{:?} (last position: {:?}) did not appear before {:?} (last position: {:?})",
before, b, after, a
),
};
self
}
}
/// Hard link an executable or copy it if that fails.
///
/// We first try to hard link an executable to save space. If that fails (as on Windows with
/// different mount points, issue #60), we copy.
#[cfg(not(target_os = "macos"))]
fn link_or_copy<P: AsRef<Path>, Q: AsRef<Path>>(from: P, to: Q) -> io::Result<()> {
let from = from.as_ref();
let to = to.as_ref();
fs::hard_link(from, to).or_else(|_| fs::copy(from, to).map(|_| ()))
}
/// Copy an executable.
///
/// On macOS, hard linking the executable leads to strange failures (issue #419), so we just copy.
#[cfg(target_os = "macos")]
fn link_or_copy<P: AsRef<Path>, Q: AsRef<Path>>(from: P, to: Q) -> io::Result<()> {
fs::copy(from, to).map(|_| ())
}
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