fix(ide): Fix bug where companion extension was not being installed on Windows correctly (#6576)

packages/core/src/ide/ide-installer.test.ts

@@ -16,6 +16,14 @@ vi.mock('fs');
 vi.mock('os');
 
 describe('ide-installer', () => {
+  beforeEach(() => {
+    vi.spyOn(os, 'homedir').mockReturnValue('/home/user');
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+  });
+
   describe('getIdeInstaller', () => {
     it('should return a VsCodeInstaller for "vscode"', () => {
       const installer = getIdeInstaller(DetectedIde.VSCode);
@@ -33,11 +41,6 @@ describe('ide-installer', () => {
       installer = getIdeInstaller(DetectedIde.VSCode)!;
       vi.spyOn(child_process, 'execSync').mockImplementation(() => '');
       vi.spyOn(fs, 'existsSync').mockReturnValue(false);
-      vi.spyOn(os, 'homedir').mockReturnValue('/home/user');
-    });
-
-    afterEach(() => {
-      vi.restoreAllMocks();
     });
 
     describe('install', () => {

packages/core/src/ide/ide-installer.ts

@@ -26,13 +26,22 @@ export interface InstallResult {
 async function findVsCodeCommand(): Promise<string | null> {
   // 1. Check PATH first.
   try {
-    child_process.execSync(
-      process.platform === 'win32'
-        ? `where.exe ${VSCODE_COMMAND}`
-        : `command -v ${VSCODE_COMMAND}`,
-      { stdio: 'ignore' },
-    );
-    return VSCODE_COMMAND;
+    if (process.platform === 'win32') {
+      const result = child_process
+        .execSync(`where.exe ${VSCODE_COMMAND}`)
+        .toString()
+        .trim();
+      // `where.exe` can return multiple paths. Return the first one.
+      const firstPath = result.split(/\r?\n/)[0];
+      if (firstPath) {
+        return firstPath;
+      }
+    } else {
+      child_process.execSync(`command -v ${VSCODE_COMMAND}`, {
+        stdio: 'ignore',
+      });
+      return VSCODE_COMMAND;
+    }
   } catch {
     // Not in PATH, continue to check common locations.
   }