From 373bbbea5b073d6c43aad8b13324625dcfc5b10b Mon Sep 17 00:00:00 2001
From: 0x676e67 <gngppz@gmail.com>
Date: Thu, 4 Sep 2025 16:20:03 +0800
Subject: [PATCH] Reapply "Don't link binaries on docs.rs" (#94)

This reverts commit d574ccc37027304897e9b0b5da7358159de23ba9.
---
 boring-sys/build/config.rs |  2 ++
 boring-sys/build/main.rs   | 21 +++++++++++++++------
 2 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/boring-sys/build/config.rs b/boring-sys/build/config.rs
index 7f63b2fa..c40f611d 100644
--- a/boring-sys/build/config.rs
+++ b/boring-sys/build/config.rs
@@ -36,6 +36,7 @@ pub(crate) struct Env {
     pub(crate) android_ndk_home: Option<PathBuf>,
     pub(crate) cmake_toolchain_file: Option<PathBuf>,
     pub(crate) cpp_runtime_lib: Option<OsString>,
+    pub(crate) docs_rs: bool,
 }
 
 impl Config {
@@ -185,6 +186,7 @@ impl Env {
             android_ndk_home: target_var("ANDROID_NDK_HOME").map(Into::into),
             cmake_toolchain_file: target_var("CMAKE_TOOLCHAIN_FILE").map(Into::into),
             cpp_runtime_lib: target_var("BORING_BSSL_RUST_CPPLIB"),
+            docs_rs: var("DOCS_RS").is_some(),
         }
     }
 }
diff --git a/boring-sys/build/main.rs b/boring-sys/build/main.rs
index 2c640f62..9c144d0f 100644
--- a/boring-sys/build/main.rs
+++ b/boring-sys/build/main.rs
@@ -660,8 +660,15 @@ fn get_cpp_runtime_lib(config: &Config) -> Option<String> {
 
 fn main() {
     let config = Config::from_env();
-    let bssl_dir = built_boring_source_path(&config);
-    let build_path = get_boringssl_platform_output_path(&config);
+    if !config.env.docs_rs {
+        emit_link_directives(&config);
+    }
+    generate_bindings(&config);
+}
+
+fn emit_link_directives(config: &Config) {
+    let bssl_dir = built_boring_source_path(config);
+    let build_path = get_boringssl_platform_output_path(config);
 
     if config.is_bazel || (config.features.is_fips_like() && config.env.path.is_some()) {
         println!(
@@ -693,10 +700,10 @@ fn main() {
     }
 
     if config.features.fips_link_precompiled {
-        link_in_precompiled_bcm_o(&config);
+        link_in_precompiled_bcm_o(config);
     }
 
-    if let Some(cpp_lib) = get_cpp_runtime_lib(&config) {
+    if let Some(cpp_lib) = get_cpp_runtime_lib(config) {
         println!("cargo:rustc-link-lib={cpp_lib}");
     }
     println!("cargo:rustc-link-lib=static=crypto");
@@ -706,13 +713,15 @@ fn main() {
         // Rust 1.87.0 compat - https://github.com/rust-lang/rust/pull/138233
         println!("cargo:rustc-link-lib=advapi32");
     }
+}
 
+fn generate_bindings(config: &Config) {
     let include_path = config.env.include_path.clone().unwrap_or_else(|| {
         if let Some(bssl_path) = &config.env.path {
             return bssl_path.join("include");
         }
 
-        let src_path = get_boringssl_source_path(&config);
+        let src_path = get_boringssl_source_path(config);
         let candidate = src_path.join("include");
 
         if candidate.exists() {
@@ -746,7 +755,7 @@ fn main() {
         .layout_tests(supports_layout_tests)
         .prepend_enum_name(true)
         .blocklist_type("max_align_t") // Not supported by bindgen on all targets, not used by BoringSSL
-        .clang_args(get_extra_clang_args_for_bindgen(&config))
+        .clang_args(get_extra_clang_args_for_bindgen(config))
         .clang_arg("-I")
         .clang_arg(include_path.display().to_string());