Wire Forge-native release infrastructure

crates/burrow-mobile-ffi/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "burrow-mobile-ffi"
+version = "0.1.0"
+edition = "2021"
+description = "Mobile FFI boundary for the Burrow Rust core."
+license = "GPL-3.0-or-later"
+
+[lib]
+crate-type = ["cdylib", "staticlib"]
+
+[dependencies]
+burrow-core = { path = "../burrow-core" }
+jni = "0.21"

crates/burrow-mobile-ffi/src/lib.rs

@@ -0,0 +1,27 @@
+#![deny(missing_debug_implementations)]
+
+use std::ffi::c_char;
+
+use jni::objects::JClass;
+use jni::sys::jstring;
+use jni::JNIEnv;
+
+static CORE_VERSION: &[u8] = concat!(env!("CARGO_PKG_VERSION"), "\0").as_bytes();
+
+/// C ABI entrypoint for platform shells that do not use JNI.
+#[no_mangle]
+pub extern "C" fn burrow_core_version() -> *const c_char {
+    CORE_VERSION.as_ptr().cast()
+}
+
+/// JNI entrypoint used by the Android Kotlin stub.
+#[no_mangle]
+pub extern "system" fn Java_net_burrow_android_BurrowCore_version(
+    env: JNIEnv<'_>,
+    _class: JClass<'_>,
+) -> jstring {
+    match env.new_string(burrow_core::identity()) {
+        Ok(value) => value.into_raw(),
+        Err(_) => std::ptr::null_mut(),
+    }
+}