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chore: gate logos-delivery transport on cargo feature, not env-dependent cfg

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kaichaosun 2026-06-30 14:17:25 +08:00
parent ebae3317d6
commit 39ecdbeb12
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2 changed files with 12 additions and 11 deletions
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19
extensions/components/build.rs
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@ -4,23 +4,24 @@ use std::process::Command;
fn main() {
println!("cargo:rerun-if-env-changed=LOGOS_DELIVERY_LIB_DIR");
println!("cargo::rustc-check-cfg=cfg(logos_delivery)");
if std::env::var_os("CARGO_FEATURE_EMBEDDED_P2P_DELIVERY").is_none() {
return;
}
// The `embedded_p2p_delivery` feature compiles the FFI module, whose symbols
// resolve only against liblogosdelivery. The feature therefore *requires* the
// native library; if it can't be located, fail fast with actionable guidance
// rather than letting a downstream crate fail later with a confusing
// unresolved-import or link error.
let Some(lib_dir) = locate_lib_dir() else {
// Feature is on but the native library is unavailable (e.g. `cargo
// check` on a machine without nix). Skip the cfg so the FFI module is
// not compiled — this keeps `cargo check` working without producing
// unresolved symbols at link time. `EmbeddedP2pDeliveryService` is
// simply absent until the library can be found.
return;
panic!(
"embedded_p2p_delivery feature is enabled but liblogosdelivery could \
not be located; enter the dev shell with `nix develop` or set \
LOGOS_DELIVERY_LIB_DIR to the directory containing the library."
);
};
println!("cargo:rustc-cfg=logos_delivery");
let out_dir = std::env::var("OUT_DIR").expect("OUT_DIR not set");
let target_os = std::env::var("CARGO_CFG_TARGET_OS").unwrap_or_default();

4
extensions/components/src/delivery.rs
View File

@ -2,8 +2,8 @@ mod local_broadcaster;
pub use local_broadcaster::LocalBroadcaster;
#[cfg(logos_delivery)]
#[cfg(feature = "embedded_p2p_delivery")]
pub mod embedded_p2p_delivery;
#[cfg(logos_delivery)]
#[cfg(feature = "embedded_p2p_delivery")]
pub use embedded_p2p_delivery::{EmbeddedP2pDeliveryService, P2pConfig};