const pinflight = require('promise-inflight') const spawn = require('./spawn.js') const { LRUCache } = require('lru-cache') const revsCache = new LRUCache({ max: 100, ttl: 5 * 60 * 1000, }) const linesToRevs = require('./lines-to-revs.js') module.exports = async (repo, opts = {}) => { if (!opts.noGitRevCache) { const cached = revsCache.get(repo) if (cached) { return cached } } return pinflight(`ls-remote:${repo}`, () => spawn(['ls-remote', repo], opts) .then(({ stdout }) => linesToRevs(stdout.trim().split('\n'))) .then(revs => { revsCache.set(repo, revs) return revs }) ) }