fix(cli): unbreak extension example and fix __runtime_js_sources (#22906)

Better example to close https://github.com/denoland/deno/issues/22600

---------

Signed-off-by: Matt Mastracci <matthew@mastracci.com>

1 files changed, 12 insertions, 1 deletions

diff --git a/runtime/ops/bootstrap.rs b/runtime/ops/bootstrap.rs
index 7de532a9f..cbb87db88 100644
--- a/runtime/ops/bootstrap.rs
+++ b/runtime/ops/bootstrap.rs
@@ -30,7 +30,7 @@ deno_core::extension!(
   },
 );
 
-#[derive(Serialize, Default)]
+#[derive(Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct SnapshotOptions {
   pub deno_version: String,
@@ -39,6 +39,17 @@ pub struct SnapshotOptions {
   pub target: String,
 }
 
+impl Default for SnapshotOptions {
+  fn default() -> Self {
+    Self {
+      deno_version: "dev".to_owned(),
+      ts_version: "n/a".to_owned(),
+      v8_version: deno_core::v8_version(),
+      target: std::env::consts::ARCH.to_owned(),
+    }
+  }
+}
+
 // Note: Called at snapshot time, op perf is not a concern.
 #[op2]
 #[serde]