feat: print cache location when no arg in deno info (#2752)

cli/flags.rs

@@ -259,8 +259,17 @@ The declaration file could be saved and used for typing information.",
         ),
     ).subcommand(
       SubCommand::with_name("info")
-        .about("Show source file related info")
-        .long_about("Show source file related info.
+        .about("Show info about cache or info related to source file")
+        .long_about("Show info about cache or info related to source file.
+
+  deno info
+
+The following information is shown:
+
+  DENO_DIR:                  location of directory containing Deno-related files
+  Remote modules cache:      location of directory containing remote modules
+  TypeScript compiler cache: location of directory containing TS compiler output
+
 
   deno info https://deno.land/std@v0.11/http/file_server.ts
 
@@ -271,7 +280,7 @@ The following information is shown:
   compiled: TypeScript only. shown local path of compiled source code.
   map:      TypeScript only. shown local path of source map.
   deps:     Dependency tree of the source file.",
-        ).arg(Arg::with_name("file").takes_value(true).required(true)),
+        ).arg(Arg::with_name("file").takes_value(true).required(false)),
     ).subcommand(
       SubCommand::with_name("eval")
         .about("Eval script")
@@ -748,8 +757,9 @@ pub fn flags_from_vec(
       DenoSubcommand::Run
     }
     ("info", Some(info_match)) => {
-      let file: &str = info_match.value_of("file").unwrap();
-      argv.extend(vec![file.to_string()]);
+      if info_match.is_present("file") {
+        argv.push(info_match.value_of("file").unwrap().to_string());
+      }
       DenoSubcommand::Info
     }
     ("install", Some(install_match)) => {
@@ -1119,6 +1129,11 @@ mod tests {
     assert_eq!(flags, DenoFlags::default());
     assert_eq!(subcommand, DenoSubcommand::Info);
     assert_eq!(argv, svec!["deno", "script.ts"]);
+
+    let (flags, subcommand, argv) = flags_from_vec(svec!["deno", "info"]);
+    assert_eq!(flags, DenoFlags::default());
+    assert_eq!(subcommand, DenoSubcommand::Info);
+    assert_eq!(argv, svec!["deno"]);
   }
 
   #[test]

cli/main.rs

@@ -56,7 +56,6 @@ use deno::ErrBox;
 use deno::ModuleSpecifier;
 use flags::DenoFlags;
 use flags::DenoSubcommand;
-use futures::future;
 use futures::lazy;
 use futures::Future;
 use log::Level;
@@ -99,7 +98,62 @@ fn js_check(r: Result<(), ErrBox>) {
   }
 }
 
-// TODO: we might want to rethink how this method works
+fn create_worker_and_state(
+  flags: DenoFlags,
+  argv: Vec<String>,
+) -> (Worker, ThreadSafeState) {
+  use crate::shell::Shell;
+  use std::sync::Arc;
+  use std::sync::Mutex;
+  let shell = Arc::new(Mutex::new(Shell::new()));
+  let progress = Progress::new();
+  progress.set_callback(move |_done, _completed, _total, status, msg| {
+    if !status.is_empty() {
+      let mut s = shell.lock().unwrap();
+      s.status(status, msg).expect("shell problem");
+    }
+  });
+  // TODO(kevinkassimo): maybe make include_deno_namespace also configurable?
+  let state =
+    ThreadSafeState::new(flags, argv, ops::op_selector_std, progress, true)
+      .unwrap();
+  let worker = Worker::new(
+    "main".to_string(),
+    startup_data::deno_isolate_init(),
+    state.clone(),
+  );
+
+  (worker, state)
+}
+
+fn types_command() {
+  let content = include_str!(concat!(
+    env!("GN_OUT_DIR"),
+    "/gen/cli/lib/lib.deno_runtime.d.ts"
+  ));
+  println!("{}", content);
+}
+
+fn print_cache_info(worker: Worker) {
+  let state = worker.state;
+
+  println!(
+    "{} {:?}",
+    ansi::bold("DENO_DIR location:".to_string()),
+    state.dir.root
+  );
+  println!(
+    "{} {:?}",
+    ansi::bold("Remote modules cache:".to_string()),
+    state.dir.deps_cache.location
+  );
+  println!(
+    "{} {:?}",
+    ansi::bold("TypeScript compiler cache:".to_string()),
+    state.dir.gen_cache.location
+  );
+}
+
 pub fn print_file_info(
   worker: Worker,
   module_specifier: &ModuleSpecifier,
@@ -181,48 +235,13 @@ pub fn print_file_info(
     })
 }
 
-fn create_worker_and_state(
-  flags: DenoFlags,
-  argv: Vec<String>,
-) -> (Worker, ThreadSafeState) {
-  use crate::shell::Shell;
-  use std::sync::Arc;
-  use std::sync::Mutex;
-  let shell = Arc::new(Mutex::new(Shell::new()));
-  let progress = Progress::new();
-  progress.set_callback(move |_done, _completed, _total, status, msg| {
-    if !status.is_empty() {
-      let mut s = shell.lock().unwrap();
-      s.status(status, msg).expect("shell problem");
-    }
-  });
-  // TODO(kevinkassimo): maybe make include_deno_namespace also configurable?
-  let state =
-    ThreadSafeState::new(flags, argv, ops::op_selector_std, progress, true)
-      .unwrap();
-  let worker = Worker::new(
-    "main".to_string(),
-    startup_data::deno_isolate_init(),
-    state.clone(),
-  );
+fn info_command(flags: DenoFlags, argv: Vec<String>) {
+  let (mut worker, state) = create_worker_and_state(flags, argv.clone());
 
-  (worker, state)
-}
-
-fn types_command() {
-  let content = include_str!(concat!(
-    env!("GN_OUT_DIR"),
-    "/gen/cli/lib/lib.deno_runtime.d.ts"
-  ));
-  println!("{}", content);
-}
-
-fn fetch_or_info_command(
-  flags: DenoFlags,
-  argv: Vec<String>,
-  print_info: bool,
-) {
-  let (mut worker, state) = create_worker_and_state(flags, argv);
+  // If it was just "deno info" print location of caches and exit
+  if argv.len() == 1 {
+    return print_cache_info(worker);
+  }
 
   let main_module = state.main_module().unwrap();
   let main_future = lazy(move || {
@@ -233,13 +252,7 @@ fn fetch_or_info_command(
     worker
       .execute_mod_async(&main_module, true)
       .map_err(print_err_and_exit)
-      .and_then(move |()| {
-        if print_info {
-          future::Either::A(print_file_info(worker, &main_module))
-        } else {
-          future::Either::B(future::ok(worker))
-        }
-      })
+      .and_then(move |()| print_file_info(worker, &main_module))
       .and_then(|worker| {
         worker.then(|result| {
           js_check(result);
@@ -250,6 +263,23 @@ fn fetch_or_info_command(
   tokio_util::run(main_future);
 }
 
+fn fetch_command(flags: DenoFlags, argv: Vec<String>) {
+  let (mut worker, state) = create_worker_and_state(flags, argv.clone());
+
+  let main_module = state.main_module().unwrap();
+  let main_future = lazy(move || {
+    // Setup runtime.
+    js_check(worker.execute("denoMain()"));
+    debug!("main_module {}", main_module);
+
+    worker.execute_mod_async(&main_module, true).then(|result| {
+      js_check(result);
+      Ok(())
+    })
+  });
+  tokio_util::run(main_future);
+}
+
 fn eval_command(flags: DenoFlags, argv: Vec<String>) {
   let (mut worker, state) = create_worker_and_state(flags, argv);
   // Wrap provided script in async function so asynchronous methods
@@ -391,8 +421,8 @@ fn main() {
     DenoSubcommand::Bundle => bundle_command(flags, argv),
     DenoSubcommand::Completions => {}
     DenoSubcommand::Eval => eval_command(flags, argv),
-    DenoSubcommand::Fetch => fetch_or_info_command(flags, argv, false),
-    DenoSubcommand::Info => fetch_or_info_command(flags, argv, true),
+    DenoSubcommand::Fetch => fetch_command(flags, argv),
+    DenoSubcommand::Info => info_command(flags, argv),
     DenoSubcommand::Install => run_script(flags, argv),
     DenoSubcommand::Repl => run_repl(flags, argv),
     DenoSubcommand::Run => run_script(flags, argv),

tests/022_info_flag_script.test

@@ -1,4 +1,4 @@
 # The output assumes 003_relative_import.ts has already been run earlier
 # and its output is cached to $DENO_DIR.
 args: info http://127.0.0.1:4545/tests/019_media_types.ts
-output: tests/022_info_flag.out
+output: tests/022_info_flag_script.out

tests/041_info_flag.out

@@ -0,0 +1,3 @@
+DENO_DIR location: "[WILDCARD]"
+Remote modules cache: "[WILDCARD]deps"
+TypeScript compiler cache: "[WILDCARD]gen"

tests/041_info_flag.test

@@ -0,0 +1,2 @@
+args: info
+output: tests/041_info_flag.out