combo.graphml.erb

<?xml version="1.0" ?>
<!-- This just produces a "pipeline of pipelines" or "value-stream" graph -->
<% rails_apps = ['site', 'admin', 'store'] %>
<graphml xmlns="http://graphml.graphdrawing.org/xmlns">
    <key id="name" for="node" attr.name="name" attr.type="string"></key>
    <key id="type" for="node" attr.name="type" attr.type="string"></key>
    <key id="template" for="node" attr.name="template" attr.type="string"></key>
    <key id="action" for="edge" attr.name="action" attr.type="string"></key>
    <key id="duration" for="edge" attr.name="duration" attr.type="integer"></key>
    <graph id="G" edgedefault="directed">
<% rails_apps.each do | app | %>
        <!-- <%=app %> nodes -->
        <node id="<%=app %>_pipeline">
            <data key="name"><%=app %></data>
            <data key="type">pipeline</data>
            <data key="template">rails_app</data>
        </node>

        <edge source="<%=app %>_pipeline" target="aggregate_pipeline">
            <data key="action">triggers</data>
        </edge>

        <% if red_data %>
            <% 10.times do %>
                <edge source="<%=app %>_pipeline" target="aggregate_pipeline">
                    <data key="action">triggered</data>
                    <data key="duration"><%= Random.rand(5..30)%></data>
                </edge>

                <edge source="<%=app %>_pipeline" target="aggregate_pipeline">
                    <data key="action">triggered</data>
                    <data key="duration"><%= Random.rand(5..30)%></data>
                </edge>

                <edge source="<%=app %>_pipeline" target="aggregate_pipeline">
                    <data key="action">triggered</data>
                    <data key="duration"><%= Random.rand(5..30)%></data>
                </edge>
            <% end %>
        <% end %>
<% end %>

        <!-- Aggregate nodes -->
        <node id="aggregate_pipeline">
            <data key="name">aggregate</data>
            <data key="type">pipeline</data>
            <!-- no template -->
        </node>

        <edge source="aggregate_pipeline" target="<%= deployments.first %>_pipeline">
            <data key="action">triggers</data>
        </edge>

        <% if red_data %>
            <% 10.times do %>
                <edge source="aggregate_pipeline" target="<%= deployments.first %>_pipeline">
                    <data key="action">triggered</data>
                    <data key="duration"><%= Random.rand(5..30)%></data>
                </edge>
            <% end %>
        <% end %>

<% while deployments.size > 0 %>
<%   environment = deployments.shift %>
<%   next_environment = deployments[0] %>
        <!--  Environment: <%= environment %>-->
        <!--  Next: <%= next_environment %>-->
        <!-- <%= environment %> nodes -->
        <node id="<%= environment %>_pipeline">
            <data key="name"><%= environment %></data>
            <data key="type">pipeline</data>
            <data key="template">deploy</data>
        </node>

        <% unless next_environment.nil? %>
        <edge source="<%= environment %>_pipeline" target="<%= next_environment %>_pipeline">
            <data key="action">triggers</data>
        </edge>

        <% if red_data %>
            <% 10.times do %>
                <edge source="<%= environment %>_pipeline" target="<%= next_environment %>_pipeline">
                    <data key="action">triggered</data>
                    <data key="duration"><%= Random.rand(5..30)%></data>
                </edge>
            <% end %>
        <% end %>
        <% end %>
<% end %>
    </graph>
</graphml>