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extern crate autocfg;
use std::env;
mod support;
/// Tests that autocfg uses the RUSTC_WRAPPER and/or RUSTC_WORKSPACE_WRAPPER
/// environment variables when running rustc.
#[test]
#[cfg(unix)] // we're using system binaries as wrappers
fn test_wrappers() {
fn set(name: &str, value: Option<bool>) {
match value {
Some(true) => env::set_var(name, "/usr/bin/env"),
Some(false) => env::set_var(name, "/bin/false"),
None => env::remove_var(name),
}
}
let out = support::out_dir();
// This is used as a heuristic to detect rust-lang/cargo#9601.
env::set_var("CARGO_ENCODED_RUSTFLAGS", "");
// No wrapper, a good pass-through wrapper, and a bad wrapper.
let variants = [None, Some(true), Some(false)];
for &workspace in &variants {
for &rustc in &variants {
set("RUSTC_WRAPPER", rustc);
set("RUSTC_WORKSPACE_WRAPPER", workspace);
let ac = autocfg::AutoCfg::with_dir(out.as_ref()).unwrap();
if rustc == Some(false) || workspace == Some(false) {
// Everything should fail with bad wrappers.
assert!(!ac.probe_type("usize"));
} else {
// Try known good and bad types for the wrapped rustc.
assert!(ac.probe_type("usize"));
assert!(!ac.probe_type("mesize"));
}
// Either way, we should have found the inner rustc version.
assert!(ac.probe_rustc_version(1, 0));
}
}
// Finally, make sure that `RUSTC_WRAPPER` is applied outermost
// by using something that doesn't pass through at all.
env::set_var("RUSTC_WRAPPER", "./tests/wrap_ignored");
env::set_var("RUSTC_WORKSPACE_WRAPPER", "/bin/false");
let ac = autocfg::AutoCfg::with_dir(out.as_ref()).unwrap();
assert!(ac.probe_type("mesize")); // anything goes!
// Make sure we also got the version from that wrapper.
assert!(ac.probe_rustc_version(12345, 6789));
}
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