restore comment

Author: Ivansete-status

examples/timer/rust_bindings/build.rs

@@ -6,6 +6,10 @@ fn main() {
     let nim_src = manifest.join("../timer.nim");
     let nim_src = nim_src.canonicalize().unwrap_or(manifest.join("../timer.nim"));
 
+    // Walk up to find the nim-ffi repo root (directory containing nim_src's library)
+    // The repo root is where nim c should be run from (contains config.nims).
+    // We assume nim_src lives somewhere under repo_root.
+    // Derive repo_root as the ancestor that contains the .nimble file or config.nims.
     let mut repo_root = nim_src.clone();
     loop {
         repo_root = match repo_root.parent() {