Merge pull request #4747 from SniperCZE/master

AddonManager cannot download anything if working dir is on ecryptfs (aka ubuntu's encrypted home)

src/Mod/AddonManager/addonmanager_workers.py

@@ -611,10 +611,14 @@ class ShowWorker(QtCore.QThread):
                         except Exception:
                             print("AddonManager: Debug: Error retrieving image from", path)
                         else:
-                            f = open(storename, "wb")
+                            try:
+                                f = open(storename, "wb")
+                            except OSError:
+                                # ecryptfs (and probably not only ecryptfs) has lower length limit for path
+                                storename = storename[-140:]
+                                f = open(storename, "wb")
                             f.write(imagedata)
                             f.close()
-
                             # resize the image to 300x300px if needed
                             img = QtGui.QImage(storename)
                             if (img.width() > 300) or (img.height() > 300):