Warn if npm run start is out of date. (#20)

* Adding some wiring to allow the Ink app to warn if there are local development changes that haven't been captured in the recent build of the Gemini CLI.

* Adding a new useAppEffects.ts file that wores some useEffect handlers in.

* Updating package-lock.json to resolve `npm ci` issues.

* Updating package-lock.json and package.json to resolve `npm ci` issues.

scripts/check-build-status.js

@@ -0,0 +1,129 @@
+import fs from 'fs';
+import path from 'path';
+import os from 'os'; // Import os module
+
+// --- Configuration ---
+const cliPackageDir = path.resolve('packages', 'cli'); // Base directory for the CLI package
+const buildTimestampPath = path.join(cliPackageDir, 'dist', '.last_build'); // Path to the timestamp file within the CLI package
+const sourceDirs = [path.join(cliPackageDir, 'src')]; // Source directory within the CLI package
+const filesToWatch = [path.join(cliPackageDir, 'package.json'), path.join(cliPackageDir, 'tsconfig.json')]; // Specific files within the CLI package
+const buildDir = path.join(cliPackageDir, 'dist'); // Build output directory within the CLI package
+const warningsFilePath = path.join(os.tmpdir(), 'gemini-code-cli-warnings.txt'); // Temp file for warnings
+// ---------------------
+
+function getMtime(filePath) {
+  try {
+    return fs.statSync(filePath).mtimeMs; // Use mtimeMs for higher precision
+  } catch (err) {
+    if (err.code === 'ENOENT') {
+      return null; // File doesn't exist
+    }
+    console.error(`Error getting stats for ${filePath}:`, err);
+    process.exit(1); // Exit on unexpected errors getting stats
+  }
+}
+
+function findSourceFiles(dir, allFiles = []) {
+  const entries = fs.readdirSync(dir, { withFileTypes: true });
+  for (const entry of entries) {
+    const fullPath = path.join(dir, entry.name);
+    // Simple check to avoid recursing into node_modules or build dir itself
+    if (entry.isDirectory() && entry.name !== 'node_modules' && fullPath !== buildDir) {
+      findSourceFiles(fullPath, allFiles);
+    } else if (entry.isFile()) {
+      allFiles.push(fullPath);
+    }
+  }
+  return allFiles;
+}
+
+console.log('Checking build status...');
+
+// Clean up old warnings file before check
+try {
+  if (fs.existsSync(warningsFilePath)) {
+    fs.unlinkSync(warningsFilePath);
+  }
+} catch (err) {
+  console.warn(`[Check Script] Warning: Could not delete previous warnings file: ${err.message}`);
+}
+
+const buildMtime = getMtime(buildTimestampPath);
+if (!buildMtime) {
+  // If build is missing, write that as a warning and exit(0) so app can display it
+  const errorMessage = `ERROR: Build timestamp file (${path.relative(process.cwd(), buildTimestampPath)}) not found. Run \`npm run build\` first.`;
+  console.error(errorMessage); // Still log error here
+  try {
+    fs.writeFileSync(warningsFilePath, errorMessage);
+  } catch (writeErr) {
+     console.error(`[Check Script] Error writing missing build warning file: ${writeErr.message}`);
+  }
+  process.exit(0); // Allow app to start and show the error
+}
+
+let newerSourceFileFound = false;
+const warningMessages = []; // Collect warnings here
+const allSourceFiles = [];
+
+// Collect files from specified directories
+sourceDirs.forEach((dir) => {
+    const dirPath = path.resolve(dir);
+    if (fs.existsSync(dirPath)) {
+        findSourceFiles(dirPath, allSourceFiles);
+    } else {
+        console.warn(`Warning: Source directory "${dir}" not found.`);
+    }
+});
+
+// Add specific files
+filesToWatch.forEach((file) => {
+    const filePath = path.resolve(file);
+     if (fs.existsSync(filePath)) {
+        allSourceFiles.push(filePath);
+    } else {
+         console.warn(`Warning: Watched file "${file}" not found.`);
+    }
+});
+
+
+// Check modification times
+for (const file of allSourceFiles) {
+  const sourceMtime = getMtime(file);
+  const relativePath = path.relative(process.cwd(), file);
+  const isNewer = sourceMtime && sourceMtime > buildMtime;
+
+  if (isNewer) {
+    const warning = `Warning: Source file "${relativePath}" has been modified since the last build.`;
+    console.warn(warning); // Keep console warning for script debugging
+    warningMessages.push(warning);
+    newerSourceFileFound = true;
+    // break; // Uncomment to stop checking after the first newer file
+  }
+}
+
+if (newerSourceFileFound) {
+  const finalWarning = '\nRun "npm run build" to incorporate changes before starting.';
+  warningMessages.push(finalWarning);
+  console.warn(finalWarning);
+
+  // Write warnings to the temp file
+  try {
+    fs.writeFileSync(warningsFilePath, warningMessages.join('\n'));
+    // Removed debug log
+  } catch (err) {
+    console.error(`[Check Script] Error writing warnings file: ${err.message}`);
+    // Proceed without writing, app won't show warnings
+  }
+} else {
+  console.log('Build is up-to-date.');
+  // Ensure no stale warning file exists if build is ok
+  try {
+      if (fs.existsSync(warningsFilePath)) {
+          fs.unlinkSync(warningsFilePath);
+      }
+  } catch (err) {
+       console.warn(`[Check Script] Warning: Could not delete previous warnings file: ${err.message}`);
+  }
+}
+
+process.exit(0); // Always exit successfully so the app starts