vue hello world项目
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3 years ago
'use strict'
var dotenvExpand = function (config) {
// if ignoring process.env, use a blank object
var environment = config.ignoreProcessEnv ? {} : process.env
var interpolate = function (envValue) {
var matches = envValue.match(/(.?\${?(?:[a-zA-Z0-9_]+)?}?)/g) || []
return matches.reduce(function (newEnv, match) {
var parts = /(.?)\${?([a-zA-Z0-9_]+)?}?/g.exec(match)
var prefix = parts[1]
var value, replacePart
if (prefix === '\\') {
replacePart = parts[0]
value = replacePart.replace('\\$', '$')
} else {
var key = parts[2]
replacePart = parts[0].substring(prefix.length)
// process.env value 'wins' over .env file's value
value = environment.hasOwnProperty(key) ? environment[key] : (config.parsed[key] || '')
// Resolve recursive interpolations
value = interpolate(value)
}
return newEnv.replace(replacePart, value)
}, envValue)
}
for (var configKey in config.parsed) {
var value = environment.hasOwnProperty(configKey) ? environment[configKey] : config.parsed[configKey]
config.parsed[configKey] = interpolate(value)
}
for (var processKey in config.parsed) {
environment[processKey] = config.parsed[processKey]
}
return config
}
module.exports = dotenvExpand