chore(tvix/eval): only print AST if requested r/4463

Change-Id: If32c7fd03458a27aecb8c473f2c48b12f8cb5175
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6128
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
Autosubmit: tazjin <tazjin@tvl.su>

1 files changed, 3 insertions, 1 deletions

diff --git a/tvix/eval/src/eval.rs b/tvix/eval/src/eval.rs
index 5e6c53cd8bf5..a12add48b552 100644
--- a/tvix/eval/src/eval.rs
+++ b/tvix/eval/src/eval.rs
@@ -10,7 +10,9 @@ pub fn interpret(code: &str) -> EvalResult<Value> {
         todo!()
     }
 
-    println!("{}", ast.root().dump());
+    if let Ok(_) = std::env::var("TVIX_DISPLAY_AST") {
+        println!("{}", ast.root().dump());
+    }
 
     let code = crate::compiler::compile(ast)?;
     println!("code: {:?}", code);