Configuring Your Development Environment

1. Environment Variables

Setting environment variables is critical for defining configuration preferences for the HelixML application. Below is an example of how to create a shell script for exporting required environment variables.

#!/bin/bash

export HELIXML_DB_HOST="localhost"
export HELIXML_DB_PORT="5432"
export HELIXML_DB_USER="username"
export HELIXML_DB_PASS="password"
export HELIXML_API_KEY="your_api_key"

To run this script, save it as set_env.sh and execute it in your terminal:

source set_env.sh

2. Configuration Files

HelixML uses JSON for configuration files. The primary configuration file is config.json. Here is an example of its structure:

{
  "database": {
    "host": "localhost",
    "port": 5432,
    "user": "username",
    "password": "password"
  },
  "api": {
    "key": "your_api_key",
    "timeout": 30
  },
  "featureToggles": {
    "newFeature": true
  }
}

3. Dynamic Configuration with JavaScript

In the JavaScript layer, configuration can be imported and utilized as follows:

import config from './config.json';

const dbHost = config.database.host;
const apiKey = config.api.key;

console.log(`Connecting to database at ${dbHost} with API key ${apiKey}`);

4. CSS Customizations

To have a dynamic style environment based on configurations, you can utilize CSS variables in your styles. Below is an example where CSS variables are set based on JavaScript configurations.

:root {
  --primary-color: #3498db;
  --font-size: 16px;
}

document.documentElement.style.setProperty('--primary-color', '#2ecc71');
document.documentElement.style.setProperty('--font-size', '20px');

5. Building and Running the Project

While set up, the build and run configurations can be specified in a package.json file. The following example demonstrates how to define scripts to build and start the application:

{
  "scripts": {
    "build": "webpack --config webpack.config.js",
    "start": "node server.js"
  }
}

To build and start the application, use:

npm run build
npm start

6. Using Shell Commands

For environmental setup or maintenance tasks, command line utility scripts can be crucial. Below is an example of a shell command to initialize the database:

#!/bin/bash

echo "Initializing database..."
psql -h $HELIXML_DB_HOST -p $HELIXML_DB_PORT -U $HELIXML_DB_USER -d your_database < schema.sql

7. Error Handling Configuration

Error handling should also be configured to ensure robust application behavior. Below is an error handler example in JavaScript:

window.addEventListener('error', (event) => {
  console.error('Error occurred:', event.error);
  // Further error handling logic...
});

8. Testing Configuration

Ensure all configurations work correctly by running unit tests. An example configuration for Jest is shown below:

{
  "test": {
    "environment": "node",
    "setupFiles": ["<rootDir>/setup.js"]
  }
}

Sources

This information is derived from internal HelixML configurations practices and coding standards within the project.