feat(sys): import types from pcre2-sys

The change introduces an optional feature nginx-sys/pcre2-sys that
replaces some generated types with corresponding imports from
"pcre2-sys".

Author: bavshin-f5

Cargo.lock

@@ -22,6 +22,7 @@ targets = []
 [dependencies]
 libc = { optional = true, workspace = true }
 openssl-sys = { version = "0.9.109", optional = true }
+pcre2-sys = { version = "0.2.9", optional = true }
 
 [target.'cfg(not(windows))'.dependencies]
 errno = { version = "0.3", default-features = false }
@@ -40,4 +41,6 @@ libc = ["dep:libc"]
 # Reexport types from "openssl-sys" instead of generating our own bindings.
 # Note that openssl-sys depends on "std".
 openssl-sys = ["dep:openssl-sys"]
+# Reexport types from "pcre2-sys" instead of generating our own bindings.
+pcre2-sys = ["dep:pcre2-sys"]
 vendored = ["dep:nginx-src"]

nginx-sys/Cargo.toml

@@ -250,7 +250,11 @@ fn generate_binding(nginx: &NginxSource) {
         .rust_target(rust_target)
         .use_core();
 
-    if cfg!(any(feature = "libc", feature = "openssl-sys")) {
+    if cfg!(any(
+        feature = "libc",
+        feature = "openssl-sys",
+        feature = "pcre2-sys"
+    )) {
         use bindgen_callbacks::TypeFlags as TF;
 
         let mut callbacks = bindgen_callbacks::NgxBindgenCallbacks::new();
@@ -302,6 +306,16 @@ fn generate_binding(nginx: &NginxSource) {
             )
         }
 
+        if cfg!(feature = "pcre2-sys") {
+            callbacks.add_external_types(
+                "pcre2_sys",
+                [
+                    ("pcre2_code_8", TF::COPY | TF::DEBUG),
+                    ("pcre2_real_code_8", TF::COPY | TF::DEBUG),
+                ],
+            );
+        }
+
         bindings = callbacks.add_to_builder(bindings);
     }