trybuild/
rustflags.rs

1use std::env;
2
3const IGNORED_LINTS: &[&str] = &["dead_code"];
4
5pub(crate) fn toml(extra_rustflags: &[&'static str]) -> toml::Value {
6    let mut rustflags = vec!["--cfg", "trybuild", "--verbose"];
7
8    for &lint in IGNORED_LINTS {
9        rustflags.push("-A");
10        rustflags.push(lint);
11    }
12
13    if let Some(flags) = env::var_os("RUSTFLAGS") {
14        // TODO: could parse this properly and allowlist or blocklist certain
15        // flags. This is good enough to at least support cargo-llvm-cov.
16        if flags.to_string_lossy().contains("-C instrument-coverage") {
17            rustflags.extend(["-C", "instrument-coverage"]);
18        }
19    }
20
21    rustflags.extend(extra_rustflags);
22
23    toml::Value::try_from(rustflags).unwrap()
24}