Improve rbx_reflector Roblox Studio automation and logging on macOS (…

…rojo-rbx#407)

This PR brings automatic place saving to macOS, so it now works exactly the same
as on Windows. It also pipes the `stdout` and `stderr` streams to `null` to get
rid of extreme verbosity on macOS. Lastly, it adds a check to the injected
plugin so it won't run outside of the defaults place, which is useful when other
Roblox Studio instances are open and Roblox Studio's "Reload plugins on file
changed" setting is enabled.

rbx_reflector/plugin.lua

@@ -1,3 +1,7 @@
+if game.Name ~= "defaults-place.rbxlx" then
+	return
+end
+
 local HttpService = game:GetService("HttpService")
 
 local SERVER_URL = "http://localhost:22073"

rbx_reflector/src/cli/defaults_place.rs

@@ -2,7 +2,7 @@ use std::{
     fmt::{self, Write},
     fs,
     path::PathBuf,
-    process::Command,
+    process::{Command, Stdio},
     sync::mpsc,
     time::Duration,
 };
@@ -63,6 +63,8 @@ fn save_place_in_studio(path: &PathBuf) -> anyhow::Result<StudioInfo> {
     log::info!("Starting Roblox Studio...");
 
     let mut studio_process = Command::new(studio_install.application_path())
+        .stdout(Stdio::null())
+        .stderr(Stdio::null())
         .arg(path)
         .spawn()?;
 
@@ -85,7 +87,24 @@ fn save_place_in_studio(path: &PathBuf) -> anyhow::Result<StudioInfo> {
         }
     }
 
-    #[cfg(not(target_os = "windows"))]
+    #[cfg(target_os = "macos")]
+    {
+        let process_id = studio_process.id();
+        let script = format!(
+            r#"
+tell application "System Events"
+    set frontmost of the first process whose unix id is {process_id} to true
+    keystroke "s" using command down
+end tell
+"#
+        );
+
+        Command::new("osascript")
+            .args(["-e", script.as_str()])
+            .output()?;
+    }
+
+    #[cfg(not(any(target_os = "windows", target_os = "macos")))]
     println!("Please save the opened place in Roblox Studio (ctrl+s).");
 
     loop {

rbx_reflector/src/cli/dump.rs

@@ -1,5 +1,5 @@
-use std::path::PathBuf;
 use std::process::Command;
+use std::{path::PathBuf, process::Stdio};
 
 use anyhow::{bail, Context};
 use clap::Parser;
@@ -22,6 +22,8 @@ impl DumpSubcommand {
             RobloxStudio::locate().context("Could not locate Roblox Studio install")?;
 
         Command::new(studio_install.application_path())
+            .stdout(Stdio::null())
+            .stderr(Stdio::null())
             .arg("-FullAPI")
             .arg(&self.output)
             .status()?;