atom/script/lib/backup-node-modules.js at master · feicc/atom · GitHub

41 lines (32 loc) · 1.35 KB

const fs = require('fs-extra')

const path = require('path')

module.exports = function (packagePath) {

const nodeModulesPath = path.join(packagePath, 'node_modules')

const nodeModulesBackupPath = path.join(packagePath, 'node_modules.bak')

if (fs.existsSync(nodeModulesBackupPath)) {

throw new Error('Cannot back up ' + nodeModulesPath + '; ' + nodeModulesBackupPath + ' already exists')

}

// some packages may have no node_modules after deduping, but we still want

// to "back-up" and later restore that fact

if (!fs.existsSync(nodeModulesPath)) {

const msg = 'Skipping backing up ' + nodeModulesPath + ' as it does not exist'

console.log(msg.gray)

const restore = function stubRestoreNodeModules () {

if (fs.existsSync(nodeModulesPath)) {

fs.removeSync(nodeModulesPath)

}

return {restore, nodeModulesPath, nodeModulesBackupPath}

}

fs.copySync(nodeModulesPath, nodeModulesBackupPath)

const restore = function restoreNodeModules () {

if (!fs.existsSync(nodeModulesBackupPath)) {

throw new Error('Cannot restore ' + nodeModulesPath + '; ' + nodeModulesBackupPath + ' does not exist')

}

if (fs.existsSync(nodeModulesPath)) {

fs.removeSync(nodeModulesPath)

}

fs.renameSync(nodeModulesBackupPath, nodeModulesPath)

}

return {restore, nodeModulesPath, nodeModulesBackupPath}

}

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