fix graph view

rainboard/templates/base.html

@@ -8,6 +8,7 @@
 {% block navbarleft %}
 <li class="nav-item"><a class="nav-link" href="{% url 'rainboard:forges' %}">Forges</a></li>
 <li class="nav-item"><a class="nav-link" href="{% url 'rainboard:namespaces' %}">Namespaces</a></li>
+<li class="nav-item"><a class="nav-link" href="{% url 'rainboard:graph' %}">Graph</a></li>
 <li class="nav-item"><a class="nav-link" href="{% url 'rainboard:contributors' %}">Contributors</a></li>
 <li class="nav-item"><a class="nav-link" href="{% url 'rainboard:gepetto' %}">Gepetto</a></li>
 {% endblock %}

rainboard/templates/rainboard/graph.html

+{% extends 'base.html' %}
+
+{% block content %}
+<h1>Graph</h1>
+<img src="{% url 'rainboard:graph_svg' %}" alt="graph" />
+{% endblock %}

rainboard/urls.py

 from django.urls import path
-from django.views.generic import RedirectView
+from django.views.generic import RedirectView, TemplateView
 
 from . import views
 
@@ -19,4 +19,6 @@ urlpatterns = [
     path('project/<str:slug>/.gitlab-ci.yml', views.ProjectGitlabView.as_view(), name='project-gitlab'),
     path('doc', views.json_doc, name='doc'),
     path('docker', views.docker, name='docker'),
+    path('graph.svg', views.graph_svg, name='graph_svg'),
+    path('graph', TemplateView.as_view(template_name='rainboard/graph.html'), name='graph'),
 ]

rainboard/views.py

+from subprocess import PIPE, run
+
 from django.http.response import HttpResponse, JsonResponse
 from django.views.generic import DetailView
 
@@ -108,13 +110,13 @@ def docker(request):
 
 
 
-def graph(request):
+def graph_svg(request):
     with open('/tmp/graph', 'w') as f:
         print('digraph {', file=f)
-        for project in Project.objects.all():
+        for project in models.Project.objects.all():
             print(f'{{I{project.pk} [label="{project}"];}}', file=f)
-        for dep in Dependency.objects.all():
+        for dep in models.Dependency.objects.all():
             print(f'I{dep.project.pk} -> I{dep.library.pk};', file=f)
         print('}', file=f)
-    svg = run(['dot', '/tmp/graph', '-Tsvg'], capture_output=True).stdout.decode()
+    svg = run(['dot', '/tmp/graph', '-Tsvg'], stdout=PIPE).stdout.decode()
     return HttpResponse(svg, content_type='image/svg+xml')