add convenience command create-env from config json

Author: mrlynn

bin/commands/config/create-env.js

@@ -0,0 +1,38 @@
+const fs = require('fs');
+const path = require('path');
+const { formatSuccess, formatError } = require('../../utils/formatting');
+const { handleError } = require('../../utils/error-handling');
+
+async function createEnvFile() {
+  try {
+    // Check if .mongodb-rag.json exists
+    const configPath = path.join(process.cwd(), '.mongodb-rag.json');
+    if (!fs.existsSync(configPath)) {
+      throw new Error('Configuration file .mongodb-rag.json not found. Please run "npx mongodb-rag init" first.');
+    }
+
+    // Read the config file
+    const config = JSON.parse(fs.readFileSync(configPath, 'utf8'));
+
+    // Create .env content
+    const envContent = [
+      `MONGODB_URI="${config.mongodbUri}"`,
+      `EMBEDDING_PROVIDER="${config.embeddingProvider}"`,
+      `EMBEDDING_API_KEY="${config.embeddingApiKey}"`,
+      `EMBEDDING_MODEL="${config.embeddingModel}"`,
+      `VECTOR_INDEX="${config.vectorSearchIndex}"`,
+      `MONGODB_DATABASE_NAME="${config.databaseName}"`,
+      `MONGODB_COLLECTION_NAME="${config.collectionName}"`,
+    ].join('\n');
+
+    // Write to .env file
+    const envPath = path.join(process.cwd(), '.env');
+    fs.writeFileSync(envPath, envContent);
+
+    console.log(formatSuccess('.env file created successfully!'));
+  } catch (error) {
+    handleError(error);
+  }
+}
+
+module.exports = createEnvFile; 

bin/mongodb-rag.js

@@ -69,11 +69,14 @@ program
   .description('MongoDB RAG CLI for managing vector search and RAG operations')
   .version(packageJson.version);
 
-// Create RAG App
+// Wrap your commands with error handling
+const wrappedCreateRagApp = wrapCommand(createRagApp);
+
+// Use the wrapped version in your command handling
 program
   .command('create-rag-app <projectName>')
   .description('Scaffold a new CRUD RAG application with MongoDB and Vector Search')
-  .action(wrapCommand(createRagApp));
+  .action(wrappedCreateRagApp);
 
 // Initialize configuration
 program

bin/utils/error-handling.js

@@ -1,6 +1,31 @@
 // bin/utils/error-handling.js
 import chalk from 'chalk';
 
+/**
+ * Wraps a command function with error handling
+ * @param {Function} commandFn The command function to wrap
+ * @returns {Function} Wrapped command function with error handling
+ */
+export const wrapCommand = (commandFn) => {
+  return async (...args) => {
+    try {
+      await commandFn(...args);
+    } catch (error) {
+      console.error('\x1b[31m%s\x1b[0m', 'Error:', error.message);
+      process.exit(1);
+    }
+  };
+};
+
+/**
+ * Generic error handler for async operations
+ * @param {Error} error The error to handle
+ */
+export const handleError = (error) => {
+  console.error('\x1b[31m%s\x1b[0m', 'Error:', error.message);
+  process.exit(1);
+};
+
 export function withErrorHandling(command) {
   return async (...args) => {
     try {

mongodb-rag-docs/docs/cli-reference.md

@@ -112,4 +112,19 @@ npx mongodb-rag reset-config
 
 Resets the configuration by re-running the setup.
 
+### **Create Environment File**
+
+```
+npx mongodb-rag create-env
+```
+
+Creates a `.env` file from your `.mongodb-rag.json` configuration. This command generates environment variables needed for your RAG application:
+- MONGODB_URI
+- EMBEDDING_PROVIDER
+- EMBEDDING_API_KEY
+- EMBEDDING_MODEL
+- VECTOR_INDEX
+- MONGODB_DATABASE_NAME
+- MONGODB_COLLECTION_NAME
+
 For more details, refer to the MongoDB-RAG API Reference.