20 lines
528 B
Rust
20 lines
528 B
Rust
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//! Deprecation warnings with "warn once" guards
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use std::sync::OnceLock;
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fn warn_once(flag: &'static OnceLock<()>, msg: &str) {
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if flag.get().is_none() {
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let _ = flag.set(());
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eprintln!("{}", msg);
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}
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}
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static NYASH_TOML_WARN_ONCE: OnceLock<()> = OnceLock::new();
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/// Warn once per process when nyash.toml is used while hako.toml is absent.
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pub fn warn_nyash_toml_used_once() {
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warn_once(
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&NYASH_TOML_WARN_ONCE,
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"[deprecate] using nyash.toml; please rename to hako.toml",
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);
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}
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