First support for md extensions; Package all needed dependencies in the repo

Source/node_modules/clean-css/lib/reader/rewrite-url.js

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+var path = require('path');
+var url = require('url');
+
+var DOUBLE_QUOTE = '"';
+var SINGLE_QUOTE = '\'';
+var URL_PREFIX = 'url(';
+var URL_SUFFIX = ')';
+
+var QUOTE_PREFIX_PATTERN = /^["']/;
+var QUOTE_SUFFIX_PATTERN = /["']$/;
+var ROUND_BRACKETS_PATTERN = /[\(\)]/;
+var URL_PREFIX_PATTERN = /^url\(/i;
+var URL_SUFFIX_PATTERN = /\)$/;
+var WHITESPACE_PATTERN = /\s/;
+
+var isWindows = process.platform == 'win32';
+
+function rebase(uri, rebaseConfig) {
+  if (!rebaseConfig) {
+    return uri;
+  }
+
+  if (isAbsolute(uri) && !isRemote(rebaseConfig.toBase)) {
+    return uri;
+  }
+
+  if (isRemote(uri) || isSVGMarker(uri) || isInternal(uri)) {
+    return uri;
+  }
+
+  if (isData(uri)) {
+    return '\'' + uri + '\'';
+  }
+
+  if (isRemote(rebaseConfig.toBase)) {
+    return url.resolve(rebaseConfig.toBase, uri);
+  }
+
+  return rebaseConfig.absolute ?
+    normalize(absolute(uri, rebaseConfig)) :
+    normalize(relative(uri, rebaseConfig));
+}
+
+function isAbsolute(uri) {
+  return path.isAbsolute(uri);
+}
+
+function isSVGMarker(uri) {
+  return uri[0] == '#';
+}
+
+function isInternal(uri) {
+  return /^\w+:\w+/.test(uri);
+}
+
+function isRemote(uri) {
+  return /^[^:]+?:\/\//.test(uri) || uri.indexOf('//') === 0;
+}
+
+function isData(uri) {
+  return uri.indexOf('data:') === 0;
+}
+
+function absolute(uri, rebaseConfig) {
+  return path
+    .resolve(path.join(rebaseConfig.fromBase || '', uri))
+    .replace(rebaseConfig.toBase, '');
+}
+
+function relative(uri, rebaseConfig) {
+  return path.relative(rebaseConfig.toBase, path.join(rebaseConfig.fromBase || '', uri));
+}
+
+function normalize(uri) {
+  return isWindows ? uri.replace(/\\/g, '/') : uri;
+}
+
+function quoteFor(unquotedUrl) {
+  if (unquotedUrl.indexOf(SINGLE_QUOTE) > -1) {
+    return DOUBLE_QUOTE;
+  } else if (unquotedUrl.indexOf(DOUBLE_QUOTE) > -1) {
+    return SINGLE_QUOTE;
+  } else if (hasWhitespace(unquotedUrl) || hasRoundBrackets(unquotedUrl)) {
+    return SINGLE_QUOTE;
+  } else {
+    return '';
+  }
+}
+
+function hasWhitespace(url) {
+  return WHITESPACE_PATTERN.test(url);
+}
+
+function hasRoundBrackets(url) {
+  return ROUND_BRACKETS_PATTERN.test(url);
+}
+
+function rewriteUrl(originalUrl, rebaseConfig, pathOnly) {
+  var strippedUrl = originalUrl
+    .replace(URL_PREFIX_PATTERN, '')
+    .replace(URL_SUFFIX_PATTERN, '')
+    .trim();
+
+  var unquotedUrl = strippedUrl
+    .replace(QUOTE_PREFIX_PATTERN, '')
+    .replace(QUOTE_SUFFIX_PATTERN, '')
+    .trim();
+
+  var quote = strippedUrl[0] == SINGLE_QUOTE || strippedUrl[0] == DOUBLE_QUOTE ?
+    strippedUrl[0] :
+    quoteFor(unquotedUrl);
+
+  return pathOnly ?
+    rebase(unquotedUrl, rebaseConfig) :
+    URL_PREFIX + quote + rebase(unquotedUrl, rebaseConfig) + quote + URL_SUFFIX;
+}
+
+module.exports = rewriteUrl;