angular-cn/tools/fs-utils/fsUtils.js

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var path = require('canonical-path');
var fs = require('fs');
var minimatch = require("minimatch");
// Utility wrappers over fs functions
module.exports = {
addSymlink: addSymlink,
removeSymlink: removeSymlink,
removeDirSync: removeDirSync,
lstatSyncExt: lstatSyncExt,
};
// create a new link (linkPath) that points
// to realPath - will also delete the linkPath
// if it is a preexisting folder and not itself a symbolic link before it
// starts.
function addSymlink(realPath, linkPath) {
// check if the linkPath is a folder
// and if so delete it
var stat = lstatSyncExt(linkPath);
if (stat && stat.isSymbolicLink()) {
// todo: check if it points to realPath
return;
}
if (stat && stat.isDirectory()) {
removeDirSync(linkPath);
}
symLinkSyncExt(realPath, linkPath, 'dir');
}
function removeSymlink(linkPath) {
var stat = lstatSyncExt(linkPath);
if (!stat || !stat.isSymbolicLink()) return;
fs.unlinkSync(linkPath);
}
// remove a dir and all of its files - sync
function removeDirSync(dirPath) {
var files;
try {
files = fs.readdirSync(dirPath);
}
catch(e) { return; }
if (files.length > 0) {
for (var i = 0; i < files.length; i++) {
var filePath = path.join(dirPath, files[i]);
var stat = fs.lstatSync(filePath);
if (stat.isFile() || stat.isSymbolicLink()) {
fs.unlinkSync(filePath);
} else {
removeDirSync(filePath);
}
}
}
fs.rmdirSync(dirPath);
}
// same as lstatSync except returns a null for nonExistent file instead of throwing
function lstatSyncExt(filePath) {
try {
var stat = fs.lstatSync(filePath);
} catch (e) {
if(e.code == 'ENOENT') return null;
throw e;
}
return stat;
}
function symLinkSyncExt(realPath, linkPath, type) {
// fs.symlink requires the real path to be fully resolved.
realPath = path.resolve(realPath);
try {
fs.symlinkSync(realPath, linkPath, type);
} catch (e) {
var msg = "Unable to create symlink: " + linkPath;
if (e.code == "EPERM") {
msg += "\nPermissions issue, on windows this function must be run as an administrator."
}
console.log(msg + "\n" + e);
}
}
// Talk to Jay - not currently needed.
//
//function globWithIgnore(basePath, globs, ignoreGlobs, options) {
// options = options || {};
// options.filters = globs.map(function (glob) {
// return minimatch.filter(glob);
// });
// options.ignoreFilters = ignoreGlobs && ignoreGlobs.map(function(glob) {
// return minimatch.filter(glob);
// });
// options.ignoreSymlink = options.ignoreSymlink == null ? true : false;
// return globSyncCore(basePath, options);
//}
//
//function globSyncCore(basePath, options) {
// var results = [];
// var files;
// try {
// files = fs.readdirSync(basePath);
// }
// catch(e) { return results; }
//
// files.forEach(function(file) {
// var filePath = path.join(basePath, file);
// var shouldIgnore = options.ignoreFilters && options.ignoreFilters.some(function(filter) {
// return filter(filePath);
// });
// if (shouldIgnore) return;
//
// var stat = fs.lstatSync(filePath);
//
// if (stat.isDirectory()) {
// if (stat.isSymbolicLink() && options.ignoreSymlink) {
// // do nothing
// } else {
// var partialResults = globSyncCore(filePath, options);
// Array.prototype.push.apply(results, partialResults);
// }
// } else {
// var ok = options.filters.every(function(filter) {
// return filter(filePath);
// });
// if (ok) {
// results.push(filePath);
// }
// }
// });
// return results;
//}