feat(rust): split core library into activate/license/heartbeat modules with build.rs and C ABI tests

native/craft-core/build.rs

@@ -0,0 +1,36 @@
+use sha2::{Digest, Sha256};
+use std::env;
+use std::fs;
+use std::path::PathBuf;
+
+fn main() {
+    let manifest_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
+    let src_dir = PathBuf::from(&manifest_dir).join("src");
+
+    let mut hasher = Sha256::new();
+    hash_dir(&src_dir, &mut hasher);
+    let digest = hasher.finalize();
+    let hash_hex = format!("{:x}", digest);
+
+    println!("cargo:rustc-env=BUILD_SRC_HASH={}", hash_hex);
+
+    let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap());
+    fs::write(out_dir.join("build_hash.txt"), format!("{}\n", hash_hex)).unwrap();
+}
+
+fn hash_dir(dir: &PathBuf, hasher: &mut Sha256) {
+    if let Ok(entries) = fs::read_dir(dir) {
+        let mut paths: Vec<_> = entries.filter_map(|e| e.ok()).collect();
+        paths.sort_by_key(|e| e.file_name());
+        for entry in paths {
+            let path = entry.path();
+            if path.is_dir() {
+                hash_dir(&path, hasher);
+            } else if path.extension().map_or(false, |ext| ext == "rs") {
+                if let Ok(content) = fs::read(&path) {
+                    hasher.update(&content);
+                }
+            }
+        }
+    }
+}