fix(tvix): make rstest pick up new test case files r/8218

Context: https://github.com/la10736/rstest/issues/256

Cargo will now cause a rebuild whenever a new test case file is added.
Previsouly running `cargo test` after adding a new test case resulted in
that case not being picked up and ignored.

Change-Id: Ibfc420b5bfe3f3ee41d3ebd3fb9d248819fa6ed9
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11751
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Autosubmit: Ilan Joselevich <personal@ilanjoselevich.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/tvix/nix-compat/build.rs b/tvix/nix-compat/build.rs
new file mode 100644
index 000000000000..c66b97016245
--- /dev/null
+++ b/tvix/nix-compat/build.rs
@@ -0,0 +1,5 @@
+fn main() {
+    // Pick up new test case files
+    // https://github.com/la10736/rstest/issues/256
+    println!("cargo:rerun-if-changed=src/derivation/tests/derivation_tests")
+}