#!/usr/bin/env node

const { promisify } = require('util');

const childProcess = require('child_process');

const fs = require('fs');

const exec = promisify(childProcess.exec);

// Build regex from commitlint's known issuePrefixes so arbitrary branch segments

// (e.g. "release-2-hotfix") don't produce bogus TICKET footers.

let issuePrefixes;

try {

issuePrefixes = require('../commitlint.config.js').parserPreset.parserOpts.issuePrefixes;

} catch (_) {

issuePrefixes = [];

}

const escapedPrefixes = issuePrefixes

.filter((p) => p !== '#')

.map((p) => p.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'));

// Anchored at branch start; case-insensitive so "web-000-desc" matches "WEB-"

// null when no prefixes are configured — avoids ^()(\d+) matching bare-digit branches.

const branchRegex =

escapedPrefixes.length > 0 ? new RegExp(`^(${escapedPrefixes.join('|')})(\\d+)`, 'i') : null;

// ex TICKET: WP-1234

const commitRegex = /(ticket|issue):\s(\S+)/gim;

function extractTicket(branch) {

if (!branchRegex) return null;

const found = branch.match(branchRegex);

return found ? found[0].toUpperCase() : null;

}

// Given the existing commit message and a ticket, return the message with a

// TICKET footer appended, or null when no change is needed (no ticket, or the

// message already contains a ticket/issue footer). Pure so it is unit-testable.

function appendTicketFooter(data, ticket) {

if (!ticket) {

return null;

}

// Reset lastIndex: commitRegex is global, so .test() is stateful across calls.

commitRegex.lastIndex = 0;

if (commitRegex.test(data)) {

return null;

}

return `${data}\nTICKET: ${ticket}\n`;

}

async function main() {

const commitMsgFilepath = process.argv[2];

try {

const branch = (await exec(`git branch --show-current`)).stdout.trim();

const ticket = extractTicket(branch);

const data = fs.readFileSync(commitMsgFilepath, 'utf8');

const updated = appendTicketFooter(data, ticket);

if (updated === null) {

return;

}

fs.writeFileSync(commitMsgFilepath, updated);

} catch (e) {}

}

module.exports = { extractTicket, appendTicketFooter };

if (require.main === module) main();