Issue 2432 - Auto-generate browser versions on requirements page

globals/get_browser_versions.py

Index: globals/get_browser_versions.py
===================================================================
new file mode 100644
--- /dev/null
+++ b/globals/get_browser_versions.py
@@ -0,0 +1,210 @@
+import re
+import os
+import sys
+import json
+import urllib2
+import errno
+import logging
+from xml.dom import minidom
+
+from jinja2 import contextfunction
+
+BROWSERS = {}
+
+CHROME_UPDATE_XML = '''\
+<?xml version="1.0" encoding="UTF-8"?>
+<request protocol="3.0" ismachine="0">
+  <os platform="win" version="99" arch="x64"/>
+  <app appid="{4DC8B4CA-1BDA-483E-B5FA-D3C12E15B62D}">
+    <updatecheck/>
+  </app>
+  <app appid="{4DC8B4CA-1BDA-483E-B5FA-D3C12E15B62D}" ap="x64-beta-multi-chrome">
+    <updatecheck/>
+  </app>
+  <app appid="{4DC8B4CA-1BDA-483E-B5FA-D3C12E15B62D}" ap="x64-dev-multi-chrome">
+    <updatecheck/>
+  </app>
+</request>'''
+
+def get_mozilla_version(product, origin_version, channel,
+                        minor=False, subdomain='aus4', origin_build='-',
+                        attribute='appVersion', platform='WINNT_x86-msvc'):
+  response = urllib2.urlopen('https://%s.mozilla.org/update/3/%s/%s/%s/%s/en-US/%s/-/default/default/update.xml?force=1' % (
+    subdomain,
+    product,
+    origin_version,
+    origin_build,
+    platform,
+    channel
+  ))
+  try:
+    doc = minidom.parse(response)
+  finally:
+    response.close()
+
+  update = doc.getElementsByTagName('update')[0]
+  full_version = update.getAttribute(attribute)
+
+  match = re.search(r'^(\d+)(?:\.\d+)?', full_version)
+  if minor:
+    return match.group(0)
+  return match.group(1)
+
+def get_mozilla_versions(product, origin_version, release_minor=False):
+  return {
+    'current': get_mozilla_version(product, origin_version, 'release', release_minor),
+    'unreleased': [
+      get_mozilla_version(product, origin_version, 'beta'),
+      get_mozilla_version(product, origin_version, 'aurora'),
+      get_mozilla_version(product, origin_version, 'nightly'),
+    ]
+  }
+
+BROWSERS['firefox'] = lambda: get_mozilla_versions('Firefox', '37.0')
+BROWSERS['thunderbird'] = lambda: get_mozilla_versions('Thunderbird', '31.0', True)
+
+def get_seamonkey_version(origin_version, origin_build, channel, **kw):
+  return get_mozilla_version('SeaMonkey', origin_version, channel, True,
+                             'aus2-community', origin_build, 'version', **kw)
+
+def get_seamonkey_versions():
+  return {
+    'current': get_seamonkey_version('2.32', '20150112201917', 'release'),
+    'unreleased': [
+      get_seamonkey_version('2.32', '20150101215737', 'beta'),
+
+      # Aurora and Nightly builds for Windows are currently broken.
+      # https://bugzilla.mozilla.org/show_bug.cgi?id=1086553
+      get_seamonkey_version('2.32', '-', 'aurora', platform='Linux_x86-gcc3'),
+      get_seamonkey_version('2.32', '-', 'nightly', platform='Linux_x86-gcc3')
+    ]
+  }
+
+BROWSERS['seamonkey'] = get_seamonkey_versions
+
+def get_chrome_version(manifest):
+  return manifest.getAttribute('version').split('.')[0]
+
+def get_chrome_versions():
+  response = urllib2.urlopen(urllib2.Request('https://tools.google.com/service/update2', CHROME_UPDATE_XML))
+  try:
+    doc = minidom.parse(response)
+  finally:
+    response.close()
+
+  manifests = doc.getElementsByTagName('manifest')
+  return {
+    'current': get_chrome_version(manifests[0]),
+    'unreleased': map(get_chrome_version, manifests[1:])
+  }
+
+BROWSERS['chrome'] = get_chrome_versions
+
+def get_opera_version(channel):
+  response = urllib2.urlopen('https://autoupdate.geo.opera.com/netinstaller/' + channel)
+  try:
+    spec = json.load(response)
+  finally:
+    response.close()
+
+  return re.search(r'\d+', spec['installer_filename']).group(0)
+
+def get_opera_versions():
+  return {
+    'current': get_opera_version('Stable'),
+    'unreleased': [
+      get_opera_version('Beta'),
+      get_opera_version('Developer')
+    ]
+  }
+
+BROWSERS['opera'] = get_opera_versions
+
+def get_yandex_version(suffix):
+  response = urllib2.urlopen('https://api.browser.yandex.ru/update-info/browser/yandex%s/win-yandex.xml' % suffix)
+  try:
+    doc = minidom.parse(response)
+  finally:
+    response.close()
+
+  item = doc.getElementsByTagName('item')[0]
+  description = item.getElementsByTagName('description')[0]
+  return re.search(r'\d+\.\d+', description.firstChild.nodeValue).group(0)
+
+def get_yandex_versions():
+  return {
+    'current': get_yandex_version(''),
+    'unreleased': [get_yandex_version('-beta')]
+  }
+
+BROWSERS['yandex'] = get_yandex_versions
+
+def open_cache_file(filename):
+  flags = os.O_RDWR | os.O_CREAT
+  try:
+    fd = os.open(filename, flags)
+  except OSError as e:
+    if e.errno != errno.ENOENT:
+      raise
+    os.makedirs(os.path.dirname(filename))
+    fd = os.open(filename, flags)
+  return os.fdopen(fd, 'w+')
+
+@contextfunction
+def get_browser_versions(context, browser):
+  func = BROWSERS[browser]
+  exc_info = None
+  try:
+    versions = func()
+  except Exception:
+    exc_info = sys.exc_info()
+
+  filename = os.path.join(context['source'].get_cache_dir(), 'browsers.json')
+  with open_cache_file(filename) as file:
+    try:
+      cache = json.load(file)
+    except ValueError:
+      if file.tell() > 0:
+        raise
+      cache = {}
+
+    cached_versions = cache.get(browser)
+    if exc_info:
+      if not cached_versions:
+        raise exc_info[0], exc_info[1], exc_info[2]
+
+      versions = cached_versions
+      logging.warning('Failed to get %s versions, falling back to '
+                      'cached versions', browser, exc_info=exc_info)
+    else:
+      # Determine previous version: If we recorded the version before and it
+      # changed since then, the old current version becomes the new previous
+      # version. If the version didn't change, use the cached previous version.
+      current = versions['current']
+      previous = None
+      if cached_versions:
+        cached_current = cached_versions['current']
+        if cached_current != current:
+          previous = cached_current
+        else:
+          previous = cached_versions['previous']
+      versions['previous'] = previous
+
+      # Remove duplicates from unreleased versions. Occasionally,
+      # different channels are on the same version, but we want
+      # to list each version only once.
+      versions['unreleased'] = sorted(
+        set(versions['unreleased']) - {current, previous},
+        key=lambda ver: map(int, ver.split('.'))
+      )
+
+      cache[browser] = versions
+      file.seek(0)
+      json.dump(cache, file)
+      file.truncate()
+
+  if not versions['previous']:
+    logging.warning("Couldn't determine previous browser version, "
+                    'please set %s.previous in %s', browser, filename)
+
+  return versions