08-27-周三_17-09-29

node_modules/less/test/copy-bom.js

@@ -0,0 +1,72 @@
+/*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
+    };
+};