@arc-fusion/cli/bin/environment.js

CLI for running Arc Fusion on your local machine

'use strict'
const semver = require('semver')
const fs = require('fs')
const path = require('path')

const ADMIN_RELEASE = require('./admin.json').version

function fileExists (filePath) {
  try {
    fs.accessSync(filePath)
    return true
  } catch (e) {
    return false
  }
}

const COMMAND_ROOT = path.resolve('.')
const FUSION_ROOT = path.dirname(__dirname)
const BOOTSTRAP_ROOT = path.join(FUSION_ROOT, 'bootstrap')

let LOCAL_SCRIPT_PATH
try {
  // don't assume the command is being called from the project root
  // we should support commands being run from subdirectories
  // require.resolve automatically resolves symlinks, so isn't useful with `npm link @arc-fusion/cli`
  // (which is really helpful in testing)
  let possibleProjectRoot = COMMAND_ROOT
  while (possibleProjectRoot.length) {
    const localScriptPath = path.join(
      possibleProjectRoot,
      'node_modules',
      '@arc-fusion',
      'cli',
      'bin',
      'fusion.js'
    )
    if (fileExists(localScriptPath)) {
      LOCAL_SCRIPT_PATH = localScriptPath
      break
    }
    possibleProjectRoot = possibleProjectRoot.substr(
      0,
      possibleProjectRoot.lastIndexOf(path.sep)
    )
  }
} catch (e) {}

const IS_GLOBAL = !LOCAL_SCRIPT_PATH

const PROJECT_ROOT = IS_GLOBAL
  ? COMMAND_ROOT
  // remove node_modules/@arc-fusion/cli/bin/fusion.js from the local script path
  : LOCAL_SCRIPT_PATH.split(path.sep).slice(0, -5).join(path.sep)

/**
 * sanitizeDBName takes an input string and returns a valid MongoDB database name
 * @param {String} name
 * @returns {String} a valid DB name for use with MongoDB
 */
const sanitizeDBName = (name) => {
  /**
   * Restrictions on Database Name
   * - Cannot be empty or contain a null character (\0).
   * - Cannot contain special characters in Windows, including /, \, ., ", $, *, <, >, |, :, or ?.
   * - Cannot contain special characters in Unix/Linux systems, including /, \, ., or (space).
   *
   * Reserved names:
   * - admin: used for administrative purposes.
   * - local: used for storing data specific to a single server instance.
   * - config: used for sharded cluster metadata.
   */
  if (['admin', 'local', 'config'].includes(name)) {
    return 'localhost'
  }

  return name.replace(/[\s.,"$*<>|?:]/g, '')
}
const REPO_NAME = sanitizeDBName(path.basename(PROJECT_ROOT))

const CACHE_VOLUME_NAME = `fusion_cache_${REPO_NAME}`

require('dotenv').config({ path: path.join(PROJECT_ROOT, '.env') })

const MONGO_VERSION =
  process.env.FUSION_RELEASE &&
  (process.env.FUSION_RELEASE === 'latest' ||
    semver.gte(process.env.FUSION_RELEASE.replace(/-.*$/, ''), '7.0.0'))
    ? '6'
    : '3.6'

module.exports = {
  ADMIN_RELEASE,
  BOOTSTRAP_ROOT,
  COMMAND_ROOT,
  FUSION_RELEASE: process.env.FUSION_RELEASE || 'latest',
  FUSION_ROOT,
  IS_GLOBAL,
  LOCAL_SCRIPT_PATH,
  MONGO_VERSION,
  PROJECT_ROOT,
  REPO_NAME,
  CACHE_VOLUME_NAME,
  sanitizeDBName
}