xrelease/dist/core/release/generate-changelog.js

xrelease (pronounced cross-release) helps you setup automated releases for your project for any language

import { execa } from 'execa';
import fs from 'fs/promises';
export async function generateChangelog(version, template = 'conventional') {
    try {
        // Try to get the last tag
        let commits;
        try {
            const { stdout: lastTag } = await execa('git', ['describe', '--tags', '--abbrev=0']);
            // Get commits since last tag
            const { stdout } = await execa('git', ['log', '--oneline', '--no-merges', `${lastTag}..HEAD`]);
            commits = stdout;
        }
        catch (error) {
            // If no tags exist, get all commits
            const { stdout } = await execa('git', ['log', '--oneline', '--no-merges']);
            commits = stdout;
        }
        // Generate changelog content
        const date = new Date().toISOString().split('T')[0];
        const header = `## [${version}] - ${date}\n\n`;
        let content = '';
        if (!commits.trim()) {
            content = '* No changes\n\n';
        }
        else if (template === 'conventional') {
            content = formatConventionalCommits(commits);
        }
        else {
            content = formatSimpleCommits(commits);
        }
        const changelogContent = header + content;
        try {
            // Try to read existing changelog
            const existingChangelog = await fs.readFile('CHANGELOG.md', 'utf-8');
            const updatedChangelog = existingChangelog.replace(/^(# Changelog\n\n)?/, ''); // Remove existing header if present
            await fs.writeFile('CHANGELOG.md', '# Changelog\n\n' + changelogContent + updatedChangelog);
        }
        catch (error) {
            // If file doesn't exist, create new one
            await fs.writeFile('CHANGELOG.md', '# Changelog\n\n' + changelogContent);
        }
    }
    catch (error) {
        if (error instanceof Error && error.message.includes('ENOENT')) {
            throw new Error('Failed to update changelog file');
        }
        throw error;
    }
}
function formatConventionalCommits(commits) {
    const lines = commits.split('\n').filter(Boolean);
    const formatted = lines.map((line) => {
        const match = line.match(/^[a-f0-9]+ (feat|fix|docs|style|refactor|test|chore)(\([^)]+\))?: (.+)$/);
        if (match) {
            const [, type, , message] = match;
            return `* ${type}: ${message}`;
        }
        return `* ${line.replace(/^[a-f0-9]+ /, '')}`;
    });
    return formatted.join('\n') + '\n\n';
}
function formatSimpleCommits(commits) {
    return (commits
        .split('\n')
        .filter(Boolean)
        .map((line) => `* ${line.replace(/^[a-f0-9]+ /, '')}`)
        .join('\n') + '\n\n');
}
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