Handle typescript version in rust (#2855)

1 files changed, 11 insertions, 0 deletions

diff --git a/cli/version.rs b/cli/version.rs
index 4b9509af9..2c98a96d4 100644
--- a/cli/version.rs
+++ b/cli/version.rs
@@ -1,6 +1,17 @@
 // Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+use serde_json;
 pub const DENO: &str = env!("CARGO_PKG_VERSION");
 
 pub fn v8() -> &'static str {
   deno::v8_version()
 }
+
+pub fn typescript() -> String {
+  // TODO: By using include_str! we are including the package.json into
+  // the deno binary using serde to decode it at runtime. This is suboptimal
+  // in space and time. We need to extract the TypeScript version at compile
+  // time instead. This will be easier after #2608.
+  let data = include_str!("../node_modules/typescript/package.json");
+  let pkg: serde_json::Value = serde_json::from_str(data).unwrap();
+  pkg["version"].as_str().unwrap().to_string()
+}