51 lines
1.3 KiB
Rust
51 lines
1.3 KiB
Rust
use std::env;
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use std::fs;
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use std::path::PathBuf;
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use std::process::Command;
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use std::str;
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const PRIVATE: &str = "\
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#[doc(hidden)]
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pub mod __private$$ {
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#[doc(hidden)]
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pub use crate::private::*;
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}
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";
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fn main() {
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println!("cargo:rerun-if-changed=build.rs");
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let out_dir = PathBuf::from(env::var_os("OUT_DIR").unwrap());
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let patch_version = env::var("CARGO_PKG_VERSION_PATCH").unwrap();
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let module = PRIVATE.replace("$$", &patch_version);
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fs::write(out_dir.join("private.rs"), module).unwrap();
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let Some(minor) = rustc_minor_version() else {
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return;
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};
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if minor >= 80 {
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println!("cargo:rustc-check-cfg=cfg(no_intrinsic_type_name)");
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println!("cargo:rustc-check-cfg=cfg(no_phantom_pinned)");
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}
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if minor < 33 {
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println!("cargo:rustc-cfg=no_phantom_pinned");
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}
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if minor < 38 {
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println!("cargo:rustc-cfg=no_intrinsic_type_name");
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}
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}
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fn rustc_minor_version() -> Option<u32> {
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let rustc = env::var_os("RUSTC")?;
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let output = Command::new(rustc).arg("--version").output().ok()?;
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let version = str::from_utf8(&output.stdout).ok()?;
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let mut pieces = version.split('.');
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if pieces.next() != Some("rustc 1") {
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return None;
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}
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pieces.next()?.parse().ok()
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}
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