Display git commit info in the /about section. (#567)

This change detects the most recent git commit short hash and writes it to the `GIT_COMMIT_INFO` constant in `packages/cli/src/generated/git-commit.sh`, optionally appending the string "(local modifications)" if additional local changes after that commit are detected.

If set, this string is displayed in the `/about` dialog as well as passed into the `/bug` template.

Example:

```
> /about

╭───────────────────────────────────────────────────────────────────────────╮
│                                                                           │
│ About Gemini CLI                                                          │
│                                                                           │
│ CLI Version               development                                     │
│ Git Commit                43370ab (local modifications)                   │
│ Model                     gemini-2.5-pro-preview-05-06                    │
│ Sandbox                   sandbox-exec (minimal)                          │
│ OS                        darwin v23.11.0                                 │
│                                                                           │
╰───────────────────────────────────────────────────────────────────────────╯
```

Additionally, this change updates `.gitignore` to ignore the generated files, `scripts/clean.sh` to remove them, and adds a `npm run generate` stage for this and any other generators we need to write.

.gitignore

@@ -31,3 +31,6 @@ bundle
 # Test report files
 junit.xml
 packages/*/coverage/
+
+# Generated files
+packages/cli/src/generated/

package.json

@@ -6,6 +6,7 @@
     "packages/*"
   ],
   "scripts": {
+    "generate": "scripts/generate-git-commit-info.sh",
     "build": "scripts/build.sh",
     "build:sandbox": "scripts/build_sandbox.sh",
     "build:all": "npm run build && npm run build:sandbox",
@@ -24,7 +25,7 @@
     "auth:docker": "gcloud auth configure-docker us-west1-docker.pkg.dev",
     "auth": "npm run auth:npm && npm run auth:docker",
     "prerelease:dev": "npm run prerelease:version --workspaces && npm run prerelease:deps --workspaces",
-    "bundle": "node_modules/.bin/esbuild packages/cli/index.ts --bundle --outfile=bundle/gemini.js --platform=node --format=esm --banner:js=\"import { createRequire } from 'module'; const require = createRequire(import.meta.url); globalThis.__filename = require('url').fileURLToPath(import.meta.url); globalThis.__dirname = require('path').dirname(globalThis.__filename);\" && bash scripts/copy_bundle_assets.sh"
+    "bundle": "npm run generate && node_modules/.bin/esbuild packages/cli/index.ts --bundle --outfile=bundle/gemini.js --platform=node --format=esm --banner:js=\"import { createRequire } from 'module'; const require = createRequire(import.meta.url); globalThis.__filename = require('url').fileURLToPath(import.meta.url); globalThis.__dirname = require('path').dirname(globalThis.__filename);\" && bash scripts/copy_bundle_assets.sh"
   },
   "bin": {
     "gemini": "bundle/gemini.js"

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

@@ -7,6 +7,7 @@
 import React from 'react';
 import { Box, Text } from 'ink';
 import { Colors } from '../colors.js';
+import { GIT_COMMIT_INFO } from '../../generated/git-commit.js';
 
 interface AboutBoxProps {
   cliVersion: string;
@@ -44,6 +45,18 @@ export const AboutBox: React.FC<AboutBoxProps> = ({
         <Text>{cliVersion}</Text>
       </Box>
     </Box>
+    {GIT_COMMIT_INFO && !['N/A'].includes(GIT_COMMIT_INFO) && (
+      <Box flexDirection="row">
+        <Box width="35%">
+          <Text bold color={Colors.LightBlue}>
+            Git Commit
+          </Text>
+        </Box>
+        <Box>
+          <Text>{GIT_COMMIT_INFO}</Text>
+        </Box>
+      </Box>
+    )}
     <Box flexDirection="row">
       <Box width="35%">
         <Text bold color={Colors.LightBlue}>

packages/cli/src/ui/hooks/slashCommandProcessor.test.ts

@@ -31,6 +31,7 @@ import { MessageType } from '../types.js';
 import { type Config } from '@gemini-code/server';
 
 import * as ShowMemoryCommandModule from './useShowMemoryCommand.js';
+import { GIT_COMMIT_INFO } from '../../generated/git-commit.js';
 
 vi.mock('./useShowMemoryCommand.js', () => ({
   SHOW_MEMORY_COMMAND_NAME: '/memory show',
@@ -244,6 +245,7 @@ Add any other context about the problem here.
 
 ## Diagnostic Information
 *   **CLI Version:** ${cliVersion}
+*   **Git Commit:** ${GIT_COMMIT_INFO}
 *   **Operating System:** ${osVersion}
 *   **Sandbox Environment:** ${sandboxEnvStr}
 *   **Model Version:** ${modelVersion}

packages/cli/src/ui/hooks/slashCommandProcessor.ts

@@ -11,6 +11,7 @@ import { UseHistoryManagerReturn } from './useHistoryManager.js';
 import { Config } from '@gemini-code/server';
 import { Message, MessageType, HistoryItemWithoutId } from '../types.js';
 import { createShowMemoryAction } from './useShowMemoryCommand.js';
+import { GIT_COMMIT_INFO } from '../../generated/git-commit.js';
 
 export interface SlashCommandActionReturn {
   shouldScheduleTool?: boolean;
@@ -215,6 +216,7 @@ Add any other context about the problem here.
 
 ## Diagnostic Information
 *   **CLI Version:** ${cliVersion}
+*   **Git Commit:** ${GIT_COMMIT_INFO}
 *   **Operating System:** ${osVersion}
 *   **Sandbox Environment:** ${sandboxEnv}
 *   **Model Version:** ${modelVersion}

packages/cli/tsconfig.json

@@ -4,9 +4,6 @@
     "outDir": "dist",
     "jsx": "react-jsx",
     "lib": ["DOM", "DOM.Iterable", "ES2020"],
-    "paths": {
-      "@gemini-code/*": ["./packages/*"]
-    },
     "types": ["node", "vitest/globals"]
   },
   "include": ["index.ts", "src/**/*.ts", "src/**/*.tsx", "src/**/*.json"],

scripts/clean.sh

@@ -17,4 +17,5 @@ set -euo pipefail
 
 # remove npm install/build artifacts
 rm -rf node_modules
+rm -rf packages/cli/src/generated/
 npm run clean --workspaces

scripts/generate-git-commit-info.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -euo pipefail
+
+GENERATED_DIR="packages/cli/src/generated"
+GIT_COMMIT_FILE="$GENERATED_DIR/git-commit.ts"
+GIT_COMMIT_INFO="N/A"
+
+mkdir -p "$GENERATED_DIR"
+
+if command -v git &> /dev/null && git rev-parse --is-inside-work-tree &> /dev/null; then
+    GIT_HASH=$(git rev-parse --short HEAD 2>/dev/null || echo "")
+    if [ -n "$GIT_HASH" ]; then
+        GIT_COMMIT_INFO="$GIT_HASH"
+        if [ -n "$(git status --porcelain 2>/dev/null)" ]; then
+            GIT_COMMIT_INFO="$GIT_HASH (local modifications)"
+        fi
+    fi
+fi
+
+cat <<EOL > "$GIT_COMMIT_FILE"
+/**
+ * @license
+ * Copyright $(date +%Y) Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+// This file is auto-generated by the build script (scripts/build.sh)
+// Do not edit this file manually.
+export const GIT_COMMIT_INFO = '$GIT_COMMIT_INFO';
+EOL