import * as fs from 'fs';

import * as semver from 'semver';

import * as config from './config';

import { execp, vlog } from './utils';

export async function ensureLatestMaster(

dir: string,

url: string,

branch = 'master'

): Promise<void> {

if (!fs.existsSync(dir)) {

// console.log(`Cloning repo ${url}\r\nThis may take a few mins...`);

await execp(`git clone ${url} ${dir}`);

if (branch !== 'master') {

await checkout(dir, branch);

}

// console.log('Clone complete');

} else {

// console.log(dir);

vlog(`${dir} Repo exists - Updating`);

await execp('git --git-dir=.git reset --hard', { cwd: dir });

await execp(`git --git-dir=.git checkout ${branch}`, { cwd: dir });

await execp(`git --git-dir=.git pull --ff-only origin ${branch}`, { cwd: dir });

}

}

export async function getVersions(dir: string): Promise<semver.SemVer[]> {

// get a list of version tags

const { stdout: tags } = await execp(`git --git-dir=.git tag`, { cwd: dir });

return tags

.split('\n')

.map(tag => semver.parse(tag))

.filter(tag => semver.valid(tag));

}

export async function checkout(dir: string, ref: string): Promise<void> {

await execp(`git --git-dir=.git checkout ${ref}`, { cwd: dir });

}