lepu-test-platform-web/node_modules/fsevents/fsevents.js

78 lines
2.1 KiB
JavaScript

/*
** © 2020 by Philipp Dunkel, Ben Noordhuis, Elan Shankar, Paul Miller
** Licensed under MIT License.
*/
/* jshint node:true */
'use strict';
if (process.platform !== 'darwin') {
throw new Error(`Module 'fsevents' is not compatible with platform '${process.platform}'`);
}
const Native = require('./fsevents.node');
const events = Native.constants;
function watch(path, handler) {
if (typeof path !== 'string') {
throw new TypeError(`fsevents argument 1 must be a string and not a ${typeof path}`);
}
if (typeof handler !== 'function') {
throw new TypeError(`fsevents argument 2 must be a function and not a ${typeof handler}`);
}
let instance = Native.start(path, handler);
if (!instance) throw new Error(`could not watch: ${path}`);
return () => {
const result = instance
? Promise.resolve(instance).then(Native.stop)
: Promise.resolve(undefined);
instance = undefined;
return result;
};
}
function getInfo(path, flags) {
return {
path,
flags,
event: getEventType(flags),
type: getFileType(flags),
changes: getFileChanges(flags)
};
}
function getFileType(flags) {
if (events.ItemIsFile & flags) return 'file';
if (events.ItemIsDir & flags) return 'directory';
if (events.ItemIsSymlink & flags) return 'symlink';
}
function anyIsTrue(obj) {
for (let key in obj) {
if (obj[key]) return true;
}
return false;
}
function getEventType(flags) {
if (events.ItemRemoved & flags) return 'deleted';
if (events.ItemRenamed & flags) return 'moved';
if (events.ItemCreated & flags) return 'created';
if (events.ItemModified & flags) return 'modified';
if (events.RootChanged & flags) return 'root-changed';
if (events.ItemCloned & flags) return 'cloned';
if (anyIsTrue(flags)) return 'modified';
return 'unknown';
}
function getFileChanges(flags) {
return {
inode: !!(events.ItemInodeMetaMod & flags),
finder: !!(events.ItemFinderInfoMod & flags),
access: !!(events.ItemChangeOwner & flags),
xattrs: !!(events.ItemXattrMod & flags)
};
}
exports.watch = watch;
exports.getInfo = getInfo;
exports.constants = events;