feat(code-rs): add forked workspace and dual build support

code-rs/code-version/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "code-version"
+version = { workspace = true }
+edition = { workspace = true }
+build = "build.rs"
+
+[lib]
+path = "src/lib.rs"

code-rs/code-version/build.rs

@@ -0,0 +1,15 @@
+fn main() {
+    // Prefer an explicit CODE_VERSION provided by CI; fall back to the
+    // crate's package version to keep local builds sane.
+    let version = std::env::var("CODE_VERSION")
+        .unwrap_or_else(|_| env!("CARGO_PKG_VERSION").to_string());
+
+    // Inject the version as a rustc env so it participates in the compiler
+    // invocation hash (sccache-friendly) and guarantees a cache miss when
+    // the version changes.
+    println!("cargo:rustc-env=CODE_VERSION={}", version);
+
+    // Ensure dependent crates rebuild when CODE_VERSION changes even if the
+    // source graph stays the same.
+    println!("cargo:rerun-if-env-changed=CODE_VERSION");
+}

code-rs/code-version/src/lib.rs

@@ -0,0 +1,14 @@
+// Compile-time embedded version string.
+// Prefer the CODE_VERSION provided by CI; fall back to the package
+// version for local builds.
+pub const CODE_VERSION: &str = {
+    match option_env!("CODE_VERSION") {
+        Some(v) => v,
+        None => env!("CARGO_PKG_VERSION"),
+    }
+};
+
+#[inline]
+pub fn version() -> &'static str {
+    CODE_VERSION
+}