WIP: Start on auto-update

Co-Authored-By: Nathan Sobo <nathan@zed.dev>
Co-Authored-By: Max Brunsfeld <max@zed.dev>
Co-Authored-By: Keith Simmons <keith@zed.dev>

crates/gpui/src/platform/mac/platform.rs

@@ -623,6 +623,22 @@ impl platform::Platform for MacPlatform {
             }
         }
     }
+
+    fn app_version(&self) -> Result<platform::AppVersion> {
+        unsafe {
+            let bundle: id = NSBundle::mainBundle();
+            if bundle.is_null() {
+                Err(anyhow!("app is not running inside a bundle"))
+            } else {
+                let version: id =
+                    msg_send![bundle, objectForInfoDictionaryKey: "CFBundleShortVersionString"];
+                let len = msg_send![version, lengthOfBytesUsingEncoding: NSUTF8StringEncoding];
+                let bytes = version.UTF8String() as *const u8;
+                let version = str::from_utf8(slice::from_raw_parts(bytes, len)).unwrap();
+                version.parse()
+            }
+        }
+    }
 }
 
 unsafe fn get_foreground_platform(object: &mut Object) -> &MacForegroundPlatform {

crates/gpui/src/platform/test.rs

@@ -1,4 +1,4 @@
-use super::{CursorStyle, WindowBounds};
+use super::{AppVersion, CursorStyle, WindowBounds};
 use crate::{
     geometry::vector::{vec2f, Vector2F},
     AnyAction, ClipboardItem,
@@ -164,6 +164,14 @@ impl super::Platform for Platform {
     fn path_for_resource(&self, _name: Option<&str>, _extension: Option<&str>) -> Result<PathBuf> {
         Err(anyhow!("app not running inside a bundle"))
     }
+
+    fn app_version(&self) -> Result<AppVersion> {
+        Ok(AppVersion {
+            major: 1,
+            minor: 0,
+            patch: 0,
+        })
+    }
 }
 
 impl Window {