refactor(cli): remove 'js' module, simplify compiler snapshot (#9020)

This commit removes "js" module from "cli".

It contained stuff related to TypeScript compiler (snapshot,
declaration files) and thus it was moved to "tsc" module.

cli/js.rs

@@ -1,40 +0,0 @@
-// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
-
-use deno_core::Snapshot;
-
-pub const TS_VERSION: &str = env!("TS_VERSION");
-
-pub static COMPILER_SNAPSHOT: &[u8] =
-  include_bytes!(concat!(env!("OUT_DIR"), "/COMPILER_SNAPSHOT.bin"));
-pub static DENO_NS_LIB: &str = include_str!("dts/lib.deno.ns.d.ts");
-pub static DENO_WEB_LIB: &str = include_str!(env!("DENO_WEB_LIB_PATH"));
-pub static DENO_FETCH_LIB: &str = include_str!(env!("DENO_FETCH_LIB_PATH"));
-pub static SHARED_GLOBALS_LIB: &str =
-  include_str!("dts/lib.deno.shared_globals.d.ts");
-pub static WINDOW_LIB: &str = include_str!("dts/lib.deno.window.d.ts");
-pub static UNSTABLE_NS_LIB: &str = include_str!("dts/lib.deno.unstable.d.ts");
-
-pub fn compiler_isolate_init() -> Snapshot {
-  debug!("Deno compiler isolate init with snapshots.");
-  let data = COMPILER_SNAPSHOT;
-  Snapshot::Static(data)
-}
-
-#[test]
-fn compiler_snapshot() {
-  let mut js_runtime = deno_core::JsRuntime::new(deno_core::RuntimeOptions {
-    startup_snapshot: Some(compiler_isolate_init()),
-    ..Default::default()
-  });
-  js_runtime
-    .execute(
-      "<anon>",
-      r#"
-    if (!(startup)) {
-        throw Error("bad");
-      }
-      console.log(`ts version: ${ts.version}`);
-    "#,
-    )
-    .unwrap();
-}

cli/lsp/tsc.rs

@@ -5,7 +5,6 @@ use super::language_server::StateSnapshot;
 use super::text;
 use super::utils;
 
-use crate::js;
 use crate::media_type::MediaType;
 use crate::tokio_util::create_basic_runtime;
 use crate::tsc;
@@ -1025,7 +1024,7 @@ fn set_asset(state: &mut State, args: Value) -> Result<Value, AnyError> {
 /// server.
 pub fn start(debug: bool) -> Result<JsRuntime, AnyError> {
   let mut runtime = JsRuntime::new(RuntimeOptions {
-    startup_snapshot: Some(js::compiler_isolate_init()),
+    startup_snapshot: Some(tsc::compiler_snapshot()),
     ..Default::default()
   });
 

cli/main.rs

@@ -25,7 +25,6 @@ mod http_cache;
 mod http_util;
 mod import_map;
 mod info;
-mod js;
 mod lockfile;
 mod lsp;
 mod media_type;
@@ -277,15 +276,15 @@ fn print_cache_info(
 fn get_types(unstable: bool) -> String {
   let mut types = format!(
     "{}\n{}\n{}\n{}\n{}",
-    crate::js::DENO_NS_LIB,
-    crate::js::DENO_WEB_LIB,
-    crate::js::DENO_FETCH_LIB,
-    crate::js::SHARED_GLOBALS_LIB,
-    crate::js::WINDOW_LIB,
+    crate::tsc::DENO_NS_LIB,
+    crate::tsc::DENO_WEB_LIB,
+    crate::tsc::DENO_FETCH_LIB,
+    crate::tsc::SHARED_GLOBALS_LIB,
+    crate::tsc::WINDOW_LIB,
   );
 
   if unstable {
-    types.push_str(&format!("\n{}", crate::js::UNSTABLE_NS_LIB,));
+    types.push_str(&format!("\n{}", crate::tsc::UNSTABLE_NS_LIB,));
   }
 
   types

cli/module_graph.rs

@@ -13,7 +13,6 @@ use crate::info::ModuleGraphInfo;
 use crate::info::ModuleInfo;
 use crate::info::ModuleInfoMap;
 use crate::info::ModuleInfoMapItem;
-use crate::js;
 use crate::lockfile::Lockfile;
 use crate::media_type::MediaType;
 use crate::specifier_handler::CachedModule;
@@ -855,17 +854,14 @@ impl Graph {
       vec![config.as_bytes(), version::deno().as_bytes().to_owned()];
     let graph = Arc::new(Mutex::new(self));
 
-    let response = tsc::exec(
-      js::compiler_isolate_init(),
-      tsc::Request {
+    let response = tsc::exec(tsc::Request {
       config: config.clone(),
       debug: options.debug,
       graph: graph.clone(),
       hash_data,
       maybe_tsbuildinfo,
       root_names,
-      },
-    )?;
+    })?;
 
     let mut graph = graph.lock().unwrap();
     graph.maybe_tsbuildinfo = response.maybe_tsbuildinfo;
@@ -983,17 +979,14 @@ impl Graph {
       let hash_data =
         vec![config.as_bytes(), version::deno().as_bytes().to_owned()];
       let graph = Arc::new(Mutex::new(self));
-      let response = tsc::exec(
-        js::compiler_isolate_init(),
-        tsc::Request {
+      let response = tsc::exec(tsc::Request {
         config: config.clone(),
         debug: options.debug,
         graph: graph.clone(),
         hash_data,
         maybe_tsbuildinfo: None,
         root_names,
-        },
-      )?;
+      })?;
 
       let graph = graph.lock().unwrap();
       match options.bundle_type {

cli/tsc.rs

@@ -25,6 +25,23 @@ use std::path::PathBuf;
 use std::sync::Arc;
 use std::sync::Mutex;
 
+// Declaration files
+
+pub static DENO_NS_LIB: &str = include_str!("dts/lib.deno.ns.d.ts");
+pub static DENO_WEB_LIB: &str = include_str!(env!("DENO_WEB_LIB_PATH"));
+pub static DENO_FETCH_LIB: &str = include_str!(env!("DENO_FETCH_LIB_PATH"));
+pub static SHARED_GLOBALS_LIB: &str =
+  include_str!("dts/lib.deno.shared_globals.d.ts");
+pub static WINDOW_LIB: &str = include_str!("dts/lib.deno.window.d.ts");
+pub static UNSTABLE_NS_LIB: &str = include_str!("dts/lib.deno.unstable.d.ts");
+
+pub static COMPILER_SNAPSHOT: &[u8] =
+  include_bytes!(concat!(env!("OUT_DIR"), "/COMPILER_SNAPSHOT.bin"));
+
+pub fn compiler_snapshot() -> Snapshot {
+  Snapshot::Static(COMPILER_SNAPSHOT)
+}
+
 /// Provide static assets that are not preloaded in the compiler snapshot.
 pub fn get_asset(asset: &str) -> Option<&'static str> {
   macro_rules! inc {
@@ -357,12 +374,9 @@ fn respond(state: &mut State, args: Value) -> Result<Value, AnyError> {
 /// Execute a request on the supplied snapshot, returning a response which
 /// contains information, like any emitted files, diagnostics, statistics and
 /// optionally an updated TypeScript build info.
-pub fn exec(
-  snapshot: Snapshot,
-  request: Request,
-) -> Result<Response, AnyError> {
+pub fn exec(request: Request) -> Result<Response, AnyError> {
   let mut runtime = JsRuntime::new(RuntimeOptions {
-    startup_snapshot: Some(snapshot),
+    startup_snapshot: Some(compiler_snapshot()),
     ..Default::default()
   });
   // tsc cannot handle root specifiers that don't have one of the "acceptable"
@@ -442,7 +456,6 @@ mod tests {
   use super::*;
   use crate::diagnostics::Diagnostic;
   use crate::diagnostics::DiagnosticCategory;
-  use crate::js;
   use crate::module_graph::tests::MockSpecifierHandler;
   use crate::module_graph::GraphBuilder;
   use crate::tsc_config::TsConfig;
@@ -512,7 +525,26 @@ mod tests {
       maybe_tsbuildinfo: None,
       root_names: vec![(specifier.clone(), MediaType::TypeScript)],
     };
-    exec(js::compiler_isolate_init(), request)
+    exec(request)
+  }
+
+  #[test]
+  fn test_compiler_snapshot() {
+    let mut js_runtime = deno_core::JsRuntime::new(deno_core::RuntimeOptions {
+      startup_snapshot: Some(compiler_snapshot()),
+      ..Default::default()
+    });
+    js_runtime
+      .execute(
+        "<anon>",
+        r#"
+      if (!(startup)) {
+          throw Error("bad");
+        }
+        console.log(`ts version: ${ts.version}`);
+      "#,
+      )
+      .unwrap();
   }
 
   #[tokio::test]

cli/version.rs

@@ -1,7 +1,7 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 
 pub const GIT_COMMIT_HASH: &str = env!("GIT_COMMIT_HASH");
-pub const TYPESCRIPT: &str = crate::js::TS_VERSION;
+pub const TYPESCRIPT: &str = env!("TS_VERSION");
 
 pub fn deno() -> String {
   let semver = env!("CARGO_PKG_VERSION");