Generate env diff between two files

gistfile1.txt

const fs = require("fs");

// Function to read the .env file and parse it into a key-value object
function readEnvFile(filePath) {
	const envData = {};
	const fileContent = fs.readFileSync(filePath, "utf-8");

	fileContent.split("\n").forEach((line) => {
		const trimmedLine = line.trim();

		// Ignore empty lines and comments
		if (trimmedLine === "" || trimmedLine.startsWith("#")) {
			return;
		}

		// Split the line into key and value at the first '='
		const [key, ...valueParts] = trimmedLine.split("=");
		const value = valueParts.join("=").trim();

		if (key) {
			envData[key.trim()] = value || "";
		}
	});

	return envData;
}

// Function to compare two .env files
function compareEnvFiles(file1, file2) {
	const env1 = readEnvFile(file1);
	const env2 = readEnvFile(file2);

	const allKeys = new Set([...Object.keys(env1), ...Object.keys(env2)]);

	const resultTable = [];
	let serialNo = 1;

	console.log(`Comparing ${file1} and ${file2}:\n`);

	// Iterate through all unique keys from both files
	allKeys.forEach((key) => {
		const inExample = env2[key] !== undefined ? "Set" : "Not Set";
		const inLocal = env1[key] !== undefined ? "Set" : "Not Set";
		resultTable.push({
			"S/No": serialNo++,
			"Key Name": key,
			"In Example": inExample,
			"In Local": inLocal,
		});
	});

	// Output the result in table format
	console.table(resultTable);

	// Output detailed value differences for keys that exist in both files but have different values
	console.log("Detailed Value Differences:");
	allKeys.forEach((key) => {
		if (env1[key] !== env2[key]) {
			console.log("---------------------------------------");
			console.log(`Key: ${key}`);
			console.log(`In Example: ${env2[key] || "Not Set"}`);
			console.log(`In Local: ${env1[key] || "Not Set"}`);
		}
	});
}

// Example usage
const file1 = ".env.local";
const file2 = ".env.example";

compareEnvFiles(file1, file2);