98 lines
4.2 KiB
JavaScript
98 lines
4.2 KiB
JavaScript
const fs = require('fs')
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const path = require('path')
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const commander = require('commander')
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const deepmerge = require('deepmerge')
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const my = { secretKeys:[] }
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module.exports = {
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mergeConfig(rawConfig) {
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if (!global.envar) {
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global.envar = rawConfig
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// 不知为何，必须定义成全局变量，才能保证多次require只执行一次。
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console.info('<<<<<<<< Merging Environment Configuration (依次载入基础配置、用户配置、机密配置、命令行参数) <<<<<<<<')
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// 配置参数（按优先级从低到高）：
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// ConfigBasic: 系统常量（全大写） 以及 默认参数（小写开头驼峰式）
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// ConfigCustom: 用户或应用自定义参数。本文件不应纳入版本管理。
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// ConfigSecret: 机密参数，例如哈希盐，webtoken密钥，等等。本文件绝对不能纳入版本管理。
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// 命令行参数
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console.info('(1) Loading Configuration Files (读取配置文件)')
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let configFile
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if (fs.existsSync((configFile = path.join(process.cwd(), './ConfigBasic.js')))) {
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global.envar = deepmerge(global.envar, require(configFile))
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console.info(` - ${configFile} is loaded.`)
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} else {
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console.warn(` - ${configFile} is missing.`)
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}
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if (fs.existsSync((configFile = path.join(process.cwd(), './ConfigCustom.js')))) {
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// 如果存在，覆盖掉 ConfigBasic 里的默认参数
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global.envar = deepmerge(global.envar, require(configFile)) // 注意，objectMerge后，产生了一个新的对象，而不是在原来的Config里添加
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console.info(`${configFile} is loaded.`)
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} else {
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console.warn(` - ${configFile} is missing.`)
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}
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if (fs.existsSync((configFile = path.join(process.cwd(), './ConfigSecret.js')))) {
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// 如果存在，覆盖掉 ConfigBasic 和 ConfigCustom 里的参数
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let secretConfig = require(configFile)
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my.secretKeys = Object.keys(secretConfig)
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global.envar = deepmerge(global.envar, secretConfig)
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console.info(` - ${configFile} is loaded.`)
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} else {
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console.warn(` - ${configFile} is missing.`)
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}
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global.envar = global.envar || {}
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global.envar.prodev = commander.prodev || global.envar.prodev || process.env.NODE_ENV || 'development' // server = require('express')(); server.get('env') === server.settings.env === process.env.NODE_ENV
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if (global.envar.prodev === 'production' && global.envar.production) {
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console.info(' - Loading Production Configuration (加载生产环境配置)')
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global.envar = deepmerge(global.envar, global.envar.production)
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}
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delete global.envar.production
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console.info('(2) Loading Command Line Parameters (载入命令行参数)')
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commander.version(global.envar.VERSION || '0.0.1', '-v, --version') // 默认是 -V。如果要 -v，就要加 '-v --version'
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for (let [key, param, desc] of global.envar.Commander_Option_List || []) {
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commander.option(param, `${desc} Default = "${global.envar[key]}"`)
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}
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commander.parse(process.argv)
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console.log('(3) Merging Command Line Parameters into Configuration (把命令行参数合并入配置)')
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for (let key in commander) {
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if (typeof commander[key] === 'string' && !/^_/.test(key)) {
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global.envar[key] = commander[key] || global.envar[key]
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}
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}
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}
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delete global.envar.Commander_Option_List // do not print Commander_Option_List to console
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console.log('>>>>>>>> Merged Environment Configuration >>>>>>>>')
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return global.envar
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},
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getDynamicConfig(dynamicConfigFile='ConfigDynamic.js') { // dynamicConfigFile should be absolute or relative to the node process's dir.
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const fullpath = path.join(process.cwd(), dynamicConfigFile)
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if (fs.existsSync(fullpath)) {
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delete require.cache[require.resolve(fullpath)] // delete require.cache[fullpath] 不起作用
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return require(fullpath)
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} else {
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return {}
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}
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},
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maskSecret() {
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let envar = JSON.parse(JSON.stringify(global.envar))
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for (let key in envar) {
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if (my.secretKeys.includes(key)) {
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envar[key] = '***confidential***'
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}
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}
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return envar
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}
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}
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