chore: add script for checking license headers

Author: jescalada

scripts/check-license-headers.ts

@@ -0,0 +1,73 @@
+import * as fs from 'fs';
+import * as path from 'path';
+
+const SOURCE_EXTENSIONS = ['.ts', '.tsx', '.js', '.jsx'];
+const IGNORE_DIRS = ['node_modules', 'dist', 'build', '.git', 'generated'];
+
+function hasLicenseHeader(fileContent: string): boolean {
+  const normalizedContent = fileContent.trim().substring(0, 500);
+
+  return (
+    normalizedContent.includes('@license') ||
+    normalizedContent.includes('Licensed to the Apache Software Foundation')
+  );
+}
+
+function checkFile(filePath: string): boolean {
+  const content = fs.readFileSync(filePath, 'utf-8');
+
+  if (!hasLicenseHeader(content)) {
+    console.error(`Missing license header: ${filePath}`);
+    return false;
+  }
+
+  return true;
+}
+
+function processDirectory(dirPath: string): boolean {
+  let allValid = true;
+  const entries = fs.readdirSync(dirPath, { withFileTypes: true });
+
+  for (const entry of entries) {
+    const fullPath = path.join(dirPath, entry.name);
+
+    if (entry.isDirectory()) {
+      if (!IGNORE_DIRS.includes(entry.name)) {
+        if (!processDirectory(fullPath)) {
+          allValid = false;
+        }
+      }
+    } else if (entry.isFile()) {
+      const ext = path.extname(entry.name);
+      if (SOURCE_EXTENSIONS.includes(ext)) {
+        if (!checkFile(fullPath)) {
+          allValid = false;
+        }
+      }
+    }
+  }
+
+  return allValid;
+}
+
+function main(): void {
+  try {
+    console.log('Checking license headers...\n');
+
+    const isValid = processDirectory('.');
+
+    if (!isValid) {
+      console.error(
+        '\nSome files are missing license headers.\n' + 'Run: npm run add-license-headers',
+      );
+      process.exit(1);
+    }
+
+    console.log('All files contain license headers.');
+  } catch (error) {
+    console.error('Error:', error);
+    process.exit(1);
+  }
+}
+
+main();