add blockchain install scripts

lib/blockchain/install.js

@@ -0,0 +1,95 @@
+const fs = require('fs')
+const path = require('path')
+const process = require('process')
+
+const makeDir = require('make-dir')
+const inquirer = require('inquirer')
+const _ = require('lodash/fp')
+
+const options = require('../options')
+const coinUtils = require('../coin-utils')
+
+const common = require('./common')
+const doVolume = require('./do-volume')
+
+const cryptos = coinUtils.cryptoCurrencies()
+
+const logger = common.logger
+
+const PLUGINS = {
+  BTC: require('./bitcoin.js'),
+  LTC: require('./litecoin.js'),
+  ETH: require('./ethereum.js'),
+  DASH: require('./dash.js'),
+  ZEC: require('./zcash.js')
+}
+
+function installedFilePath (crypto) {
+  return path.resolve(options.blockchainDir, crypto.code, '.installed')
+}
+
+function isInstalled (crypto) {
+  return fs.existsSync(installedFilePath(crypto))
+}
+
+const choices = _.map(c => {
+  const checked = isInstalled(c)
+  return {
+    name: c.display,
+    value: c.code,
+    checked,
+    disabled: checked && 'Installed'
+  }
+}, cryptos)
+
+const questions = []
+
+questions.push({
+  type: 'checkbox',
+  name: 'crypto',
+  message: 'Which cryptocurrencies would you like to install?',
+  choices
+})
+
+function processCryptos (codes) {
+  if (_.isEmpty(codes)) {
+    logger.info('No cryptos selected. Exiting.')
+    process.exit(0)
+  }
+
+  doVolume.prepareVolume()
+
+  logger.info('Thanks! Installing: %s. Will take a while...', _.join(', ', codes))
+
+  const selectedCryptos = _.map(code => _.find(['code', code], cryptos), codes)
+  _.forEach(setupCrypto, selectedCryptos)
+  common.es('pm2 save')
+  logger.info('Installation complete.')
+}
+
+inquirer.prompt(questions)
+.then(answers => processCryptos(answers.crypto))
+
+function plugin (crypto) {
+  const plugin = PLUGINS[crypto.cryptoCode]
+  if (!plugin) throw new Error(`No such plugin: ${crypto.cryptoCode}`)
+  return plugin
+}
+
+function setupCrypto (crypto) {
+  logger.info(`Installing ${crypto.display}...`)
+  const cryptoDir = path.resolve(options.blockchainDir, crypto.code)
+  makeDir.sync(cryptoDir)
+  const cryptoPlugin = plugin(crypto)
+  const oldDir = process.cwd()
+  const tmpDir = '/tmp/blockchain-install'
+
+  makeDir.sync(tmpDir)
+  process.chdir(tmpDir)
+  common.es('rm -rf *')
+  common.fetchAndInstall(crypto)
+  cryptoPlugin.setup(cryptoDir)
+  fs.writeFileSync(installedFilePath(crypto), '')
+  process.chdir(oldDir)
+}
+