Current File : //proc/self/root/lib/node_modules/pm2/node_modules/shimmer/index.js
'use strict'
function isFunction (funktion) {
return typeof funktion === 'function'
}
// Default to complaining loudly when things don't go according to plan.
var logger = console.error.bind(console)
// Sets a property on an object, preserving its enumerability.
// This function assumes that the property is already writable.
function defineProperty (obj, name, value) {
var enumerable = !!obj[name] && obj.propertyIsEnumerable(name)
Object.defineProperty(obj, name, {
configurable: true,
enumerable: enumerable,
writable: true,
value: value
})
}
// Keep initialization idempotent.
function shimmer (options) {
if (options && options.logger) {
if (!isFunction(options.logger)) logger("new logger isn't a function, not replacing")
else logger = options.logger
}
}
function wrap (nodule, name, wrapper) {
if (!nodule || !nodule[name]) {
logger('no original function ' + name + ' to wrap')
return
}
if (!wrapper) {
logger('no wrapper function')
logger((new Error()).stack)
return
}
if (!isFunction(nodule[name]) || !isFunction(wrapper)) {
logger('original object and wrapper must be functions')
return
}
var original = nodule[name]
var wrapped = wrapper(original, name)
defineProperty(wrapped, '__original', original)
defineProperty(wrapped, '__unwrap', function () {
if (nodule[name] === wrapped) defineProperty(nodule, name, original)
})
defineProperty(wrapped, '__wrapped', true)
defineProperty(nodule, name, wrapped)
return wrapped
}
function massWrap (nodules, names, wrapper) {
if (!nodules) {
logger('must provide one or more modules to patch')
logger((new Error()).stack)
return
} else if (!Array.isArray(nodules)) {
nodules = [nodules]
}
if (!(names && Array.isArray(names))) {
logger('must provide one or more functions to wrap on modules')
return
}
nodules.forEach(function (nodule) {
names.forEach(function (name) {
wrap(nodule, name, wrapper)
})
})
}
function unwrap (nodule, name) {
if (!nodule || !nodule[name]) {
logger('no function to unwrap.')
logger((new Error()).stack)
return
}
if (!nodule[name].__unwrap) {
logger('no original to unwrap to -- has ' + name + ' already been unwrapped?')
} else {
return nodule[name].__unwrap()
}
}
function massUnwrap (nodules, names) {
if (!nodules) {
logger('must provide one or more modules to patch')
logger((new Error()).stack)
return
} else if (!Array.isArray(nodules)) {
nodules = [nodules]
}
if (!(names && Array.isArray(names))) {
logger('must provide one or more functions to unwrap on modules')
return
}
nodules.forEach(function (nodule) {
names.forEach(function (name) {
unwrap(nodule, name)
})
})
}
shimmer.wrap = wrap
shimmer.massWrap = massWrap
shimmer.unwrap = unwrap
shimmer.massUnwrap = massUnwrap
module.exports = shimmer
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