[DECO-531] Transition sync state to ERROR if the underlying sync process fails (#494)

Author: shreyas-goenka

packages/databricks-vscode/src/cli/BricksTasks.ts

@@ -83,6 +83,9 @@ class CustomSyncTerminal implements Pseudoterminal {
     private writeEmitter = new EventEmitter<string>();
     onDidWrite: Event<string> = this.writeEmitter.event;
 
+    private closeEmitter = new EventEmitter<void>();
+    onDidClose: Event<void> = this.closeEmitter.event;
+
     private syncProcess: ChildProcess | undefined;
     private bricksSyncParser: BricksSyncParser;
 
@@ -159,6 +162,14 @@ class CustomSyncTerminal implements Pseudoterminal {
         this.syncProcess.stdout.on("data", (data) => {
             this.bricksSyncParser.process(data.toString());
         });
+
+        this.syncProcess.on("close", (code) => {
+            if (code !== 0) {
+                this.syncStateCallback("ERROR");
+                // terminate the vscode terminal task
+                this.closeEmitter.fire();
+            }
+        });
     }
 }