Make print_file_info async

cli/main.rs

@@ -51,6 +51,7 @@ use flags::DenoFlags;
 use flags::DenoSubcommand;
 use futures::lazy;
 use futures::Future;
+use futures::future;
 use log::{LevelFilter, Metadata, Record};
 use std::env;
 
@@ -92,53 +93,55 @@ where
   }
 }
 
-pub fn print_file_info(worker: &Worker, url: &str) {
-  let maybe_out =
-    state::fetch_module_meta_data_and_maybe_compile(&worker.state, url, ".");
-  if let Err(err) = maybe_out {
-    println!("{}", err);
-    return;
-  }
-  let out = maybe_out.unwrap();
-
-  println!("{} {}", ansi::bold("local:".to_string()), &(out.filename));
+pub fn print_file_info(
+  worker: Worker,
+  url: &str,
+) -> impl Future<Item = Worker, Error = ()> {
+  worker::fetch_module_meta_data_and_maybe_compile_async(
+    &worker.state,
+    url,
+    ".",
+  ).and_then(move |out| {
+    println!("{} {}", ansi::bold("local:".to_string()), &(out.filename));
 
-  println!(
-    "{} {}",
-    ansi::bold("type:".to_string()),
-    msg::enum_name_media_type(out.media_type)
-  );
-
-  if out.maybe_output_code_filename.is_some() {
     println!(
       "{} {}",
-      ansi::bold("compiled:".to_string()),
-      out.maybe_output_code_filename.as_ref().unwrap(),
+      ansi::bold("type:".to_string()),
+      msg::enum_name_media_type(out.media_type)
     );
-  }
 
-  if out.maybe_source_map_filename.is_some() {
-    println!(
-      "{} {}",
-      ansi::bold("map:".to_string()),
-      out.maybe_source_map_filename.as_ref().unwrap()
-    );
-  }
+    if out.maybe_output_code_filename.is_some() {
+      println!(
+        "{} {}",
+        ansi::bold("compiled:".to_string()),
+        out.maybe_output_code_filename.as_ref().unwrap(),
+      );
+    }
+
+    if out.maybe_source_map_filename.is_some() {
+      println!(
+        "{} {}",
+        ansi::bold("map:".to_string()),
+        out.maybe_source_map_filename.as_ref().unwrap()
+      );
+    }
 
-  let modules = worker.modules.lock().unwrap();
-  if let Some(deps) = modules.deps(&out.module_name) {
-    println!("{}{}", ansi::bold("deps:\n".to_string()), deps.name);
-    if let Some(ref depsdeps) = deps.deps {
-      for d in depsdeps {
-        println!("{}", d);
+	let modules = worker.modules.lock().unwrap();
+    if let Some(deps) = worker.modules.deps(&out.module_name) {
+      println!("{}{}", ansi::bold("deps:\n".to_string()), deps.name);
+      if let Some(ref depsdeps) = deps.deps {
+        for d in depsdeps {
+          println!("{}", d);
+        }
       }
+    } else {
+      println!(
+        "{} cannot retrieve full dependency graph",
+        ansi::bold("deps:".to_string()),
+      );
     }
-  } else {
-    println!(
-      "{} cannot retrieve full dependency graph",
-      ansi::bold("deps:".to_string()),
-    );
-  }
+    Ok(worker)
+  }).map_err(|err| println!("{}", err))
 }
 
 fn create_worker_and_state(
@@ -195,8 +198,11 @@ fn fetch_or_info_command(
       .execute_mod_async(&main_url, true)
       .and_then(move |()| {
         if print_info {
-          print_file_info(&worker, &main_module);
+          future::Either::A(print_file_info(worker, &main_module))
+        } else {
+          future::Either::B(future::ok(worker))
         }
+      }).and_then(|worker| {
         worker.then(|result| {
           js_check(result);
           Ok(())