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gaia/tests/jsmarionette/runner/marionette-js-runner/lib/applymanifest.js

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+'use strict';
+var fs = require('fs'),
+    path = require('path'),
+    difference = require('array-difference'),
+    intersect = require('intersect');
+
+function resolvePath(pathStr) {
+  return path.resolve(pathStr);
+}
+
+/**
+ *  Defensively resolve arguments to absolute paths (in order to avoid
+ * "resolving" arguments that do not actually reference files)
+ *
+ * @private
+ * @param {String} argument from the command-line.
+ * @return {String}
+ */
+function defensiveResolvePath(argument) {
+  var resolved = resolvePath(argument);
+
+  if (fs.existsSync(resolved)) {
+    return resolved;
+  }
+
+  return argument;
+}
+
+/**
+ * Transform the input command-line arguments according to the directives found
+ * in the specified manifest file.
+ *
+ * @param {Object} manifest referencing the manifest file.
+ * @param {Array} files to filter.
+ * @return {Array} filtered files.
+ */
+function applyManifest(manifest, files) {
+  var fullPaths = files.map(resolvePath);
+
+  var withoutFiles;
+  if (manifest.whitelist) {
+    manifest.whitelist = manifest.whitelist.map(resolvePath);
+    // Select all file names that have not been specified
+    withoutFiles = difference(fullPaths, manifest.whitelist);
+  } else if (manifest.blacklist) {
+    var blacklist = manifest.blacklist;
+    if (!Array.isArray(blacklist)) {
+      blacklist = Object.keys(blacklist);
+    }
+    blacklist = blacklist.map(resolvePath);
+    // Select only the file names that have been specified
+    withoutFiles = intersect(fullPaths, blacklist);
+  }
+
+  fullPaths = fullPaths.map(defensiveResolvePath);
+
+  // Remove the appropriate file arguments from the list
+  return difference(withoutFiles, fullPaths);
+}
+
+module.exports = applyManifest;