Add prompt to migrate workspace extensions (#7065)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

packages/cli/src/ui/components/WorkspaceMigrationDialog.tsx

@@ -0,0 +1,108 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { Box, Text, useInput } from 'ink';
+import {
+  type Extension,
+  performWorkspaceExtensionMigration,
+} from '../../config/extension.js';
+import { RadioButtonSelect } from './shared/RadioButtonSelect.js';
+import { Colors } from '../colors.js';
+import { useState } from 'react';
+
+export function WorkspaceMigrationDialog(props: {
+  workspaceExtensions: Extension[];
+  onOpen: () => void;
+  onClose: () => void;
+}) {
+  const { workspaceExtensions, onOpen, onClose } = props;
+  const [migrationComplete, setMigrationComplete] = useState(false);
+  const [failedExtensions, setFailedExtensions] = useState<string[]>([]);
+  onOpen();
+  const onMigrate = async () => {
+    const failed =
+      await performWorkspaceExtensionMigration(workspaceExtensions);
+    setFailedExtensions(failed);
+    setMigrationComplete(true);
+  };
+
+  useInput((input) => {
+    if (migrationComplete && input === 'q') {
+      process.exit(0);
+    }
+  });
+
+  if (migrationComplete) {
+    return (
+      <Box
+        flexDirection="column"
+        borderStyle="round"
+        borderColor={Colors.Gray}
+        padding={1}
+      >
+        {failedExtensions.length > 0 ? (
+          <>
+            <Text>
+              The following extensions failed to migrate. Please try installing
+              them manually. To see other changes, Gemini CLI must be restarted.
+              Press {"'q'"} to quit.
+            </Text>
+            <Box flexDirection="column" marginTop={1} marginLeft={2}>
+              {failedExtensions.map((failed) => (
+                <Text key={failed}>- {failed}</Text>
+              ))}
+            </Box>
+          </>
+        ) : (
+          <Text>
+            Migration complete. To see changes, Gemini CLI must be restarted.
+            Press {"'q'"} to quit.
+          </Text>
+        )}
+      </Box>
+    );
+  }
+
+  return (
+    <Box
+      flexDirection="column"
+      borderStyle="round"
+      borderColor={Colors.Gray}
+      padding={1}
+    >
+      <Text bold>Workspace-level extensions are deprecated{'\n'}</Text>
+      <Text>Would you like to install them at the user level?</Text>
+      <Text>
+        The extension definition will remain in your workspace directory.
+      </Text>
+      <Text>
+        If you opt to skip, you can install them manually using the extensions
+        install command.
+      </Text>
+
+      <Box flexDirection="column" marginTop={1} marginLeft={2}>
+        {workspaceExtensions.map((extension) => (
+          <Text key={extension.config.name}>- {extension.config.name}</Text>
+        ))}
+      </Box>
+      <Box marginTop={1}>
+        <RadioButtonSelect
+          items={[
+            { label: 'Install all', value: 'migrate' },
+            { label: 'Skip', value: 'skip' },
+          ]}
+          onSelect={(value: string) => {
+            if (value === 'migrate') {
+              onMigrate();
+            } else {
+              onClose();
+            }
+          }}
+        />
+      </Box>
+    </Box>
+  );
+}