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compiletest: Disambiguate extern crate deps shared with the compiler

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This commit is contained in:
Igor Matuszewski 2019-04-22 15:04:48 +02:00
parent d420589e1a
commit 56389f36a3
1 changed files with 25 additions and 2 deletions
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27
tests/compile-test.rs
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@ -46,9 +46,32 @@ fn config(mode: &str, dir: PathBuf) -> compiletest::Config {
config.run_lib_path = rustc_lib_path();
config.compile_lib_path = rustc_lib_path();
}
// When we'll want to use `extern crate ..` for a dependency that is used
// both by the crate and the compiler itself, we can't simply pass -L flags
// as we'll get a duplicate matching versions. Instead, disambiguate with
// `--extern dep=path`.
// See https://github.com/rust-lang/rust-clippy/issues/4015.
let needs_disambiguation = ["serde"];
// This assumes that deps are compiled (they are for Cargo integration tests).
let deps = std::fs::read_dir(host_libs().join("deps")).unwrap();
let disambiguated = deps
.filter_map(|dep| {
let path = dep.ok()?.path();
let name = path.file_name()?.to_string_lossy();
// NOTE: This only handles a single dep
// https://github.com/laumann/compiletest-rs/issues/101
needs_disambiguation
.iter()
.find(|dep| name.starts_with(&format!("lib{}-", dep)))
.map(|dep| format!("--extern {}={}", dep, path.display()))
})
.collect::<Vec<_>>();
config.target_rustcflags = Some(format!(
"-L {0} -L {0}/deps -Dwarnings -Zui-testing",
host_libs().display()
"-L {0} -L {0}/deps -Dwarnings -Zui-testing {1}",
host_libs().display(),
disambiguated.join(" ")
));
config.mode = cfg_mode;