Adds release prep script

Author: eamodio

package.json

@@ -14686,6 +14686,7 @@
 		"package": "vsce package --yarn",
 		"package-pre": "yarn run patch-pre && yarn run package --pre-release",
 		"patch-pre": "node ./scripts/applyPreReleasePatch.js",
+		"prep-release": "node ./scripts/prep-release.js",
 		"pretty": "prettier --config .prettierrc --log-level warn --write .",
 		"pub": "vsce publish --yarn",
 		"pub-pre": "vsce publish --yarn --pre-release",

scripts/prep-release.js

@@ -0,0 +1,76 @@
+const { exec } = require('child_process');
+const fs = require('fs');
+const readline = require('readline');
+const path = require('path');
+
+const versionRegex = /^\d{1,4}\.\d{1,4}\.\d{1,4}$/;
+
+const changelogPath = path.join(__dirname, '..', 'CHANGELOG.md');
+console.log(changelogPath);
+let data = fs.readFileSync(changelogPath, 'utf8');
+
+// Find the current version number
+const match = /\[unreleased\]: https:\/\/github\.com\/gitkraken\/vscode-gitlens\/compare\/v(.+)\.\.\.HEAD/.exec(data);
+const currentVersion = match?.[1];
+if (currentVersion == null || versionRegex.test(currentVersion) === false) {
+	console.error('Unable to find current version number.');
+	return;
+}
+
+// Create readline interface for getting input from user
+const rl = readline.createInterface({
+	input: process.stdin,
+	output: process.stdout,
+});
+
+// Ask for new version number
+rl.question(`Enter the new version number (format x.x.x, current is ${currentVersion}): `, function (version) {
+	// Validate the version input
+	if (!versionRegex.test(version)) {
+		console.error(
+			'Invalid version number. Please use the format x.y.z where x, y, and z are positive numbers no greater than 4 digits.',
+		);
+		rl.close();
+		return;
+	}
+
+	// Get today's date
+	const today = new Date();
+	const yyyy = today.getFullYear();
+	const mm = String(today.getMonth() + 1).padStart(2, '0'); //January is 0!
+	const dd = String(today.getDate()).padStart(2, '0');
+
+	const newVersionHeader = `## [Unreleased]\n\n## [${version}] - ${yyyy}-${mm}-${dd}`;
+	const newVersionLink = `[${version}]: https://github.com/gitkraken/vscode-gitlens/compare/v${currentVersion}...gitkraken:v${version}`;
+
+	// Add the new version header below the ## [Unreleased] header
+	data = data.replace('## [Unreleased]', newVersionHeader);
+
+	const unreleasedLink = match[0].replace(/\/compare\/v(.+?)\.\.\.HEAD/, `\/compare\/v${version}...HEAD`);
+
+	// Update the [unreleased]: line
+	data = data.replace(match[0], `${unreleasedLink}\n${newVersionLink}`);
+
+	// Writing the updated version data to CHANGELOG
+	fs.writeFileSync(changelogPath, data);
+
+	// Stage CHANGELOG
+	exec('git add CHANGELOG.md', err => {
+		if (err) {
+			console.error(`Unable to stage CHANGELOG.md: ${err}`);
+			return;
+		}
+
+		// Call 'yarn version' to commit and create the tag
+		exec(`yarn version --new-version ${version}`, err => {
+			if (err) {
+				console.error(`'yarn version' failed: ${err}`);
+				return;
+			}
+
+			console.log(`${version} is ready for release.`);
+		});
+	});
+
+	rl.close();
+});