launch: support macos (#1201)

Author: BrettMayson

bin/src/commands/launch/launcher.rs

@@ -303,6 +303,8 @@ impl<'a> Launcher<'a> {
         if instances.len() == 1 {
             let mut cmd = if cfg!(target_os = "windows") {
                 super::platforms::windows(&self.arma3, &self.executable, &instances[0])
+            } else if cfg!(target_os = "macos") {
+                super::platforms::macos(&instances[0])
             } else {
                 super::platforms::linux(&instances[0])
             }?;
@@ -319,6 +321,8 @@ impl<'a> Launcher<'a> {
                 children.push(
                     if cfg!(target_os = "windows") {
                         super::platforms::windows(&self.arma3, &self.executable, &instance)?
+                    } else if cfg!(target_os = "macos") {
+                        super::platforms::macos(&instance)?
                     } else {
                         super::platforms::linux(&instance)?
                     }

bin/src/commands/launch/platforms.rs

@@ -90,3 +90,16 @@ pub fn linux(args: &[String]) -> Result<Command, Error> {
     };
     Ok(cmd)
 }
+
+#[allow(clippy::unnecessary_wraps)]
+pub fn macos(args: &[String]) -> Result<Command, Error> {
+    info!("Launching with:\n  {}", args.join("\n  "));
+    let mut cmd = std::process::Command::new("/Applications/Steam.app/Contents/MacOS/steam_osx");
+    cmd.arg("-applaunch")
+        .arg("107410")
+        .arg("-nolauncher")
+        .args(args)
+        .stdout(std::process::Stdio::null())
+        .stderr(std::process::Stdio::null());
+    Ok(cmd)
+}