From 830d8fba206ac620bed8693282e225ffbf3bdc57 Mon Sep 17 00:00:00 2001
From: Yaroslav Bolyukin <iam@lach.pw>
Date: Sun, 05 Apr 2026 19:25:11 +0000
Subject: [PATCH] fix: yaml stream handling difference


---
--- a/crates/jrsonnet-stdlib/src/parse.rs
+++ b/crates/jrsonnet-stdlib/src/parse.rs
@@ -9,7 +9,9 @@
 
 #[builtin]
 pub fn builtin_parse_yaml(str: IStr) -> Result<Val> {
-	let out = serde_saphyr::from_multiple_with_options::<Val>(
+	let needs_synthetic_null = str.trim_end().ends_with("\n---");
+
+	let mut out = serde_saphyr::from_multiple_with_options::<Val>(
 		&str,
 		serde_saphyr::Options {
 			// Golang/C++ compat
@@ -20,6 +22,13 @@
 		},
 	)
 	.map_err(|e| runtime_error!("failed to parse yaml: {e}"))?;
+
+	// saphyr and other yaml implementations disagree on how to handle an empty document in multi-document stream.
+	// Saphyr only considers document started after anything is emitted after the document delimiter
+	if needs_synthetic_null {
+		out.push(Val::Null);
+	}
+
 	Ok(if out.is_empty() {
 		Val::Null
 	} else if out.len() == 1 {

-- 
gitstuff