Serve build status images to docs site

.gitignore

@@ -1,3 +1,4 @@
 node_modules
 _site
-.DS_Store
+.DS_Store
+*.pyc

app.yaml

@@ -1,18 +1,25 @@
 application: polymer-project
-version: 20130822
+version: 20130829
 runtime: python27
 api_version: 1
 threadsafe: yes
 
 #default_expiration: "0s"
 
+libraries:
+- name: PIL
+  version: latest
+
 handlers:
 
 # Top-level URLs ---------------------------------------------------------------
 - url: /$
   static_files: _site/index.html
   upload: _site/index\.html
 
+- url: /build/(.*)
+  script: build.application
+
 - url: /polymer.min.js
   static_files: js/polymer.min.js
   upload: js/polymer\.min\.js

build.py

@@ -0,0 +1,72 @@
+import urllib, urllib2
+import json
+
+from PIL import Image, ImageDraw
+import StringIO
+
+import webapp2
+
+PLATFORMS_ALL = ['Mac', 'Linux', 'Win']
+
+
+class BuildStatusHandler(webapp2.RequestHandler):
+
+  def get_last_build(self, project, platform):
+    url = 'http://build.chromium.org/p/client.polymer/json/builders/' + urllib.quote('%s %s' % (project, platform)) + '/builds/-1'
+    return json.load(urllib2.urlopen(url))
+
+  def last_build_is_successful(self, project, platform, browser):
+    success = True
+    build = self.get_last_build(project, platform)
+    foundTest = False
+    for step in build['steps']:
+      if foundTest:
+        if step['results'][0] != 0:
+          if browser == 'all' or step['text'][0].find(browser) != -1:
+            success = False
+            break
+      elif step['name'] == 'test':
+        if step['results'][0] != 0:
+          success = False
+          break
+        else:
+          foundTest = True
+    return success
+
+  def get(self, project, platform='all', browser='all'):
+    success = True
+    if platform == 'all':
+      for plat in PLATFORMS_ALL:
+        if not self.last_build_is_successful(project, plat, browser):
+          success = False
+          break
+    else:
+      success = self.last_build_is_successful(project, platform, browser)
+
+    if success:
+      color = 'rgb(0, 169, 92)'
+      status = 'passing'
+    else:
+      color = 'rgb(216, 68, 55)'
+      status = 'failing'
+    image = Image.new("RGBA", (120, 20))
+    draw = ImageDraw.Draw(image)
+    draw.polygon([(1, 1), (89, 1), (89, 19), (1, 19)], 'white', 'rgb(127, 127, 127)')
+    draw.polygon([(37, 3), (87, 3), (87, 18), (37, 18)], color)
+    draw.text((5, 5), 'build', 'rgb(127, 127, 127)')
+    draw.text((41, 5), status, 'white')
+
+    output = StringIO.StringIO()
+    image.save(output, format="png")
+    layer = output.getvalue()
+    output.close()
+
+    self.response.headers['Content-Type'] = 'image/png'
+    self.response.write(layer)
+
+
+application = webapp2.WSGIApplication([
+  webapp2.Route('/build/<project>/status.png', BuildStatusHandler),
+  webapp2.Route('/build/<project>/<platform>/status.png', BuildStatusHandler),
+  webapp2.Route('/build/<project>/<platform>/<browser>/status.png', BuildStatusHandler),
+], debug=False)