Osascript shell hack to engage "Reader View" after loading a url in Safari

reader

#! /usr/bin/osascript

# opens url $1 in Safari and tries to engage its Reader View (if it shows up within 15s)

# You will probably need to first add Terminal.app here (osx Yosemite; 10.10.3):
# System Preferences -> Security & Privacy -> Privacy -> Accessibility

on run argv
  set article_url to item 1 of argv

  tell application "Safari" to open location article_url

  # uncomment to makes the Safari window 800px wide, snapped to the right of a macbook pro retina display
  # tell application "Safari" to set bounds of front window to {640, 0, 1440, 878}

  activate application "Safari"
  tell application "System Events" to tell process "Safari"
    repeat 15 times
      set url_bar to text field "Address and Search" of group 2 of toolbar 1 of front window
      if exists button "Show Reader" of url_bar then exit repeat
      delay 1
    end repeat

    if exists button "Show Reader" of url_bar then
      click button "Show Reader" of url_bar
    end if
  end tell
  return
end run