update

node_modules/stylus-lookup/index.js

@@ -0,0 +1,71 @@
+'use strict';
+
+const path = require('path');
+const fs = require('fs');
+const debug = require('debug')('stylus-lookup');
+
+/**
+ * Determines the resolved dependency path according to
+ * the Stylus compiler's dependency lookup behavior
+ *
+ * @param  {Object} options
+ * @param  {String} options.dependency - the import name
+ * @param  {String} options.filename - the file containing the import
+ * @param  {String} options.directory - the location of all stylus files
+ * @return {String}
+ */
+module.exports = function({dependency: dep, filename, directory} = {}) {
+  if (typeof dep === 'undefined') {
+    throw new Error('dependency is not supplied');
+  }
+  if (typeof filename === 'undefined') {
+    throw new Error('filename is not supplied');
+  }
+  if (typeof directory === 'undefined') {
+    throw new Error('directory is not supplied');
+  }
+
+  const fileDir = path.dirname(filename);
+
+  debug('trying to resolve: ' + dep);
+  debug('filename: ', filename);
+  debug('directory: ', directory);
+
+  // Use the file's extension if necessary
+  const ext = path.extname(dep) ? '' : path.extname(filename);
+  let resolved;
+
+  if (!path.isAbsolute(dep)) {
+    resolved = path.resolve(filename, dep) + ext;
+
+    debug('resolved relative dependency: ' + resolved);
+
+    if (fs.existsSync(resolved)) {
+      return resolved;
+    } else {
+      debug('resolved file does not exist');
+    }
+  }
+
+  const samedir = path.resolve(fileDir, dep) + ext;
+  debug('resolving dep about the parent file\'s directory: ' + samedir);
+
+  if (fs.existsSync(samedir)) {
+    return samedir;
+  } else {
+    debug('resolved file does not exist');
+  }
+
+  // Check for dep/index.styl file
+  const indexFile = path.join(path.resolve(fileDir, dep), 'index.styl');
+  debug('resolving dep as if it points to an index.styl file: ' + indexFile);
+
+  if (fs.existsSync(indexFile)) {
+    return indexFile;
+  } else {
+    debug('resolved file does not exist');
+  }
+
+  debug('could not resolve the dependency');
+  return '';
+};