#!/usr/bin/env node

const fs = require('fs');

const path = require('path');

const assert = require('assert');

const pkgFile = path.resolve(__dirname, '..', 'package.json');

const pkg = JSON.parse(fs.readFileSync(pkgFile));

const { CIRCLE_SHA1, CIRCLE_BRANCH } = process.env;

assert(CIRCLE_BRANCH, 'CIRCLE_BRANCH environment variable not set');

assert(CIRCLE_SHA1, 'CIRCLE_SHA1 environment variable not set');

assert(

CIRCLE_BRANCH === 'develop',

'This script should only be run from "develop"'

);

// Shorten the SHA

const GIT_SHA = CIRCLE_SHA1.substr(0, 7);

// Strip the "dist tag" from the version (if it exists)

const version = pkg.version.replace(/-\w+\.\w+$/, '');

const nextVersion = `${version}-canary.${GIT_SHA}`;

console.log(nextVersion);