Merge pull request #340 from gagern/pngRepack

Use jspngopt and pako to create reproducible PNG files for Chrome as well

dockers/Screenshotter/screenshotter.js

@@ -3,8 +3,10 @@
 var childProcess = require("child_process");
 var fs = require("fs");
 var http = require("http");
-var path = require("path");
+var jspngopt = require("jspngopt");
 var net = require("net");
+var pako = require("pako");
+var path = require("path");
 var selenium = require("selenium-webdriver");
 
 var app = require("../../server");
@@ -271,10 +273,15 @@ function takeScreenshot(key) {
         }
         var file = path.join(dstDir, key + "-" + opts.browser + ".png");
         var deferred = new selenium.promise.Deferred();
-        fs.writeFile(file, img.buf, function(err) {
+        var opt = new jspngopt.Optimizer({
+            pako: pako
+        });
+        var buf = opt.bufferSync(img.buf);
+        fs.writeFile(file, buf, function(err) {
             if (err) {
                 deferred.reject(err);
-            } else {
+            }
+            else {
                 deferred.fulfill();
             }
         });

dockers/Screenshotter/screenshotter.sh

@@ -8,7 +8,7 @@
 # directly.
 
 status=0
-for browserTag in firefox:2.46.0; do
+for browserTag in firefox:2.46.0 chrome:2.46.0; do
     browser=${browserTag%:*}
     image=selenium/standalone-${browserTag}
     echo "Starting container for ${image}"

package.json

@@ -20,7 +20,9 @@
     "jasmine-node": "2.0.0-beta4",
     "js-yaml": "^3.3.1",
     "jshint": "^2.5.6",
+    "jspngopt": "^0.1.0",
     "less": "~1.7.5",
+    "pako": "0.2.7",
     "nomnom": "^1.8.1",
     "selenium-webdriver": "^2.46.1",
     "uglify-js": "~2.4.15"