--- a/candolint/handlers.py	Mon Sep 18 14:27:41 2017 +0800
+++ b/candolint/handlers.py	Mon Sep 18 15:45:42 2017 +0800
@@ -225,5 +225,31 @@
         self.render('status.svg', width=width, parts=parts, height=20)
 
 
+class DotHandler(BaseHandler):
+    def get(self, domain, user, name, check_num):
+        project = get_project_or_404(domain, user, name)
+        checks = (Check
+            .select(*Check.get_light_fields())
+            .where(Check.project == project))
+        if check_num != 'latest':
+            checks = checks.where(Check.ordinal == check_num)
+        branch = self.get_argument('branch', None)
+        if branch is not None:
+            checks = checks.join(Change).where(Change.branch == branch)
+        check = checks.first()
+        if check is None:
+            color = 'transparent'
+        elif not check.success:
+            color = '#777'
+        elif check.errors:
+            color = '#da314b'
+        elif check.warnings:
+            color = '#faa732'
+        else:
+            color = '#8cc14c'
+        self.set_header('Content-Type', 'image/svg+xml; charset=utf-8')
+        self.render('dot.svg', color=color)
+
+
 class ErrorHandler(BaseHandler, BaseErrorHandler):
     pass

--- a/templates/check.html	Mon Sep 18 14:27:41 2017 +0800
+++ b/templates/check.html	Mon Sep 18 15:45:42 2017 +0800
@@ -19,6 +19,7 @@
           <dd>{{ check.get_duration() }}</dd>
           <dt>Result:</dt>
           <dd>
+            <img src="{{ project.get_url() }}/{{ check.ordinal }}/dot.svg" alt="Check Result">
             {% if check.success %}
               {{ locale.translate('{} error', '{} errors', check.errors).format(check.errors) }},
               {{ locale.translate('{} warning', '{} warnings', check.warnings).format(check.warnings) }}

--- a/tests/test_viewer.py	Mon Sep 18 14:27:41 2017 +0800
+++ b/tests/test_viewer.py	Mon Sep 18 15:45:42 2017 +0800
@@ -185,3 +185,14 @@
         assert root.attrib['height'] == '20'
         text = [el.text for el in root.findall('./svg:g/svg:text', ns)]
         assert text[::2] == ['lint', '1 error', '1 warning']
+
+    def test_dot(self):
+        response = self.fetch('/example.com/alice/test-viewer/latest/dot.svg')
+        assert response.code == 200
+        root = ElementTree.fromstring(response.body)
+        ns = {'svg': 'http://www.w3.org/2000/svg'}
+        assert root.tag == '{http://www.w3.org/2000/svg}svg'
+        assert root.attrib.get('height') == '12'
+        circles = root.findall('./svg:circle', ns)
+        assert len(circles) == 1
+        assert circles[0].attrib.get('fill').startswith('#')

--- a/viewer.py	Mon Sep 18 14:27:41 2017 +0800
+++ b/viewer.py	Mon Sep 18 15:45:42 2017 +0800
@@ -20,6 +20,7 @@
             (project_re, h.ProjectHandler),
             (project_re + r'/atom', h.AtomHandler),
             (project_re + r'/(\d+|latest)(?:/(raw))?', h.CheckHandler),
+            (project_re + r'/(\d+|latest)/dot\.svg', h.DotHandler),
             (project_re + r'/(\d+|latest)/compare/(\d+|latest)', h.CompareHandler),
             (project_re + r'/status\.svg', h.StatusHandler),
             (r'.*', h.ErrorHandler, {'status_code': 404})