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/* jshint latedef: nofunc */
// This is used to copy a folder (the test/less/* files & sub-folders), adding a BOM to the start of each LESS and CSS file.
// This is a based on the copySync method from fs-extra (https://github.com/jprichardson/node-fs-extra/).
module.exports = function() {
var path = require('path'),
fs = require('fs');
var BUF_LENGTH = 64 * 1024;
var _buff = new Buffer(BUF_LENGTH);
function copyFolderWithBom(src, dest) {
var stats = fs.lstatSync(src);
var destFolder = path.dirname(dest);
var destFolderExists = fs.existsSync(destFolder);
var performCopy = false;
if (stats.isFile()) {
if (!destFolderExists) {
fs.mkdirSync(destFolder);
}
if (src.match(/\.(css|less)$/)) {
copyFileAddingBomSync(src, dest);
} else {
copyFileSync(src, dest);
}
}
else if (stats.isDirectory()) {
if (!fs.existsSync(destFolder)) {
fs.mkdirSync(destFolder);
}
if (!fs.existsSync(dest)) {
fs.mkdirSync(dest);
}
fs.readdirSync(src).forEach(function(d) {
if (d !== 'bom') {
copyFolderWithBom(path.join(src, d), path.join(dest, d));
}
});
}
}
function copyFileAddingBomSync(srcFile, destFile) {
var contents = fs.readFileSync(srcFile, { encoding: 'utf8' });
if (!contents.length || contents.charCodeAt(0) !== 0xFEFF) {
contents = '\ufeff' + contents;
}
fs.writeFileSync(destFile, contents, { encoding: 'utf8' });
}
function copyFileSync(srcFile, destFile) {
var fdr = fs.openSync(srcFile, 'r');
var stat = fs.fstatSync(fdr);
var fdw = fs.openSync(destFile, 'w', stat.mode);
var bytesRead = 1;
var pos = 0;
while (bytesRead > 0) {
bytesRead = fs.readSync(fdr, _buff, 0, BUF_LENGTH, pos)
fs.writeSync(fdw, _buff, 0, bytesRead);
pos += bytesRead;
}
fs.closeSync(fdr);
fs.closeSync(fdw);
}
return {
copyFolderWithBom: copyFolderWithBom
};
};