Initial commit of Gemini Code CLI

This commit introduces the initial codebase for the Gemini Code CLI, a command-line interface designed to facilitate interaction with the Gemini API for software engineering tasks.

The code was migrated from a previous git repository as a single squashed commit.

Core Features & Components:

*   **Gemini Integration:** Leverages the `@google/genai` SDK to interact with the Gemini models, supporting chat history, streaming responses, and function calling (tools).
*   **Terminal UI:** Built with Ink (React for CLIs) providing an interactive chat interface within the terminal, including input prompts, message display, loading indicators, and tool interaction elements.
*   **Tooling Framework:** Implements a robust tool system allowing Gemini to interact with the local environment. Includes tools for:
    *   File system listing (`ls`)
    *   File reading (`read-file`)
    *   Content searching (`grep`)
    *   File globbing (`glob`)
    *   File editing (`edit`)
    *   File writing (`write-file`)
    *   Executing bash commands (`terminal`)
*   **State Management:** Handles the streaming state of Gemini responses and manages the conversation history.
*   **Configuration:** Parses command-line arguments (`yargs`) and loads environment variables (`dotenv`) for setup.
*   **Project Structure:** Organized into `core`, `ui`, `tools`, `config`, and `utils` directories using TypeScript. Includes basic build (`tsc`) and start scripts.

This initial version establishes the foundation for a powerful CLI tool enabling developers to use Gemini for coding assistance directly in their terminal environment.

---
Created by yours truly: __Gemini Code__

packages/cli/src/utils/paths.ts

@@ -0,0 +1,102 @@
+import process from 'node:process';
+import path from 'node:path'; // Import the 'path' module
+
+/**
+ * Returns the target directory, using the provided argument or the current working directory.
+ */
+export function getTargetDirectory(targetDirArg: string | undefined): string {
+    return targetDirArg || process.cwd();
+}
+
+/**
+ * Shortens a path string if it exceeds maxLen, prioritizing the start and end segments.
+ * Example: /path/to/a/very/long/file.txt -> /path/.../long/file.txt
+ */
+export function shortenPath(filePath: string, maxLen: number = 35): string {
+    if (filePath.length <= maxLen) {
+        return filePath;
+    }
+
+    const parsedPath = path.parse(filePath);
+    const root = parsedPath.root;
+    const separator = path.sep;
+
+    // Get segments of the path *after* the root
+    const relativePath = filePath.substring(root.length);
+    const segments = relativePath.split(separator).filter(s => s !== ''); // Filter out empty segments
+
+    // Handle cases with no segments after root (e.g., "/", "C:\") or only one segment
+    if (segments.length <= 1) {
+        // Fallback to simple start/end truncation for very short paths or single segments
+        const keepLen = Math.floor((maxLen - 3) / 2);
+        // Ensure keepLen is not negative if maxLen is very small
+        if (keepLen <= 0) {
+             return filePath.substring(0, maxLen - 3) + '...';
+        }
+        const start = filePath.substring(0, keepLen);
+        const end = filePath.substring(filePath.length - keepLen);
+        return `${start}...${end}`;
+    }
+
+    const firstDir = segments[0];
+    const startComponent = root + firstDir;
+
+    const endPartSegments: string[] = [];
+    // Base length: startComponent + separator + "..."
+    let currentLength = startComponent.length + separator.length + 3;
+
+    // Iterate backwards through segments (excluding the first one)
+    for (let i = segments.length - 1; i >= 1; i--) {
+        const segment = segments[i];
+        // Length needed if we add this segment: current + separator + segment
+        const lengthWithSegment = currentLength + separator.length + segment.length;
+
+        if (lengthWithSegment <= maxLen) {
+            endPartSegments.unshift(segment); // Add to the beginning of the end part
+            currentLength = lengthWithSegment;
+        } else {
+            // Adding this segment would exceed maxLen
+            break;
+        }
+    }
+
+    // Construct the final path
+    let result = startComponent + separator + '...';
+    if (endPartSegments.length > 0) {
+        result += separator + endPartSegments.join(separator);
+    }
+
+    // As a final check, if the result is somehow still too long (e.g., startComponent + ... is too long)
+    // fallback to simple truncation of the original path
+    if (result.length > maxLen) {
+         const keepLen = Math.floor((maxLen - 3) / 2);
+         if (keepLen <= 0) {
+              return filePath.substring(0, maxLen - 3) + '...';
+         }
+         const start = filePath.substring(0, keepLen);
+         const end = filePath.substring(filePath.length - keepLen);
+         return `${start}...${end}`;
+    }
+
+
+    return result;
+}
+
+/**
+ * Calculates the relative path from a root directory to a target path.
+ * Ensures both paths are resolved before calculating.
+ * Returns '.' if the target path is the same as the root directory.
+ *
+ * @param targetPath The absolute or relative path to make relative.
+ * @param rootDirectory The absolute path of the directory to make the target path relative to.
+ * @returns The relative path from rootDirectory to targetPath.
+ */
+export function makeRelative(targetPath: string, rootDirectory: string): string {
+    const resolvedTargetPath = path.resolve(targetPath);
+    const resolvedRootDirectory = path.resolve(rootDirectory);
+
+    const relativePath = path.relative(resolvedRootDirectory, resolvedTargetPath);
+
+    // If the paths are the same, path.relative returns '', return '.' instead
+    return relativePath || '.';
+}