/// <summary>
/// Log the graph in graphviz (dot) format.
/// </summary>
/// <param name="graph">Graph to log</param>
/// <remarks>
/// Example of a graphviz graph description
///
/// digraph graphname {
/// a -> b -> c;
/// b -> d;
/// }
///
/// For more info see https://www.graphviz.org/
/// </remarks>
/// <returns>Async task</returns>
private async Task LogGraphViz(Channel targetChannel, DependencyFlowGraph graph)
{
StringBuilder subgraphClusterWriter = null;
bool writeToSubgraphCluster = targetChannel != null;
if (writeToSubgraphCluster)
{
subgraphClusterWriter = new StringBuilder();
subgraphClusterWriter.AppendLine($" subgraph cluster_{OutputHelpers.CalculateGraphVizNodeName(targetChannel.Name)} {{");
subgraphClusterWriter.AppendLine($" label = \"{targetChannel.Name}\"");
}
using (StreamWriter writer = OutputHelpers.GetOutputFileStreamOrConsole(_options.GraphVizOutputFile))
{
await writer.WriteLineAsync("digraph repositoryGraph {");
await writer.WriteLineAsync(" node [shape=record]");
foreach (DependencyFlowNode node in graph.Nodes)
{
StringBuilder nodeBuilder = new StringBuilder();
// First add the node name
nodeBuilder.Append($" {OutputHelpers.CalculateGraphVizNodeName(node)}");
// Then add the label. label looks like [label="<info here>"]
nodeBuilder.Append("[label=\"");
// Append friendly repo name
nodeBuilder.Append(OutputHelpers.GetSimpleRepoName(node.Repository));
nodeBuilder.Append(@"\n");
// Append branch name
nodeBuilder.Append(node.Branch);
// Append end of label and end of node.
nodeBuilder.Append("\"];");
// If highlighting a specific channel, Add those nodes to a subgraph cluster
// if they output to the subgraph cluster.
if (writeToSubgraphCluster && node.OutputChannels.Any(c => c == targetChannel.Name))
{
subgraphClusterWriter.AppendLine($" {OutputHelpers.CalculateGraphVizNodeName(node)}");
}
// Write it out.
await writer.WriteLineAsync(nodeBuilder.ToString());
}
// Now write all the edges
foreach (DependencyFlowEdge edge in graph.Edges)
{
string fromNode = OutputHelpers.CalculateGraphVizNodeName(edge.From);
string toNode = OutputHelpers.CalculateGraphVizNodeName(edge.To);
string label = $"{edge.Subscription.Channel.Name} ({edge.Subscription.Policy.UpdateFrequency})";
if (writeToSubgraphCluster && edge.Subscription.Channel.Name == targetChannel.Name)
{
subgraphClusterWriter.AppendLine($" {fromNode} -> {toNode} [{GetEdgeStyle(edge)}]");
}
else
{
await writer.WriteLineAsync($" {fromNode} -> {toNode} [{GetEdgeStyle(edge)}]");
}
}
if (writeToSubgraphCluster)
{
await writer.WriteLineAsync(subgraphClusterWriter.ToString());
await writer.WriteLineAsync(" }");
}
// Write a legend
await writer.WriteLineAsync(" subgraph cluster1 {");
await writer.WriteLineAsync(" rankdir=RL;");
await writer.WriteLineAsync(" label = \"Legend\"");
await writer.WriteLineAsync(" shape = rectangle;");
await writer.WriteLineAsync(" color = black;");
await writer.WriteLineAsync(" a[style = invis];");
await writer.WriteLineAsync(" b[style = invis];");
await writer.WriteLineAsync(" c[style = invis];");
await writer.WriteLineAsync(" d[style = invis];");
await writer.WriteLineAsync(" e[style = invis];");
await writer.WriteLineAsync(" f[style = invis];");
await writer.WriteLineAsync(" c->d[label = \"Updated Every Build\", style = bold];");
await writer.WriteLineAsync(" a->b[label = \"Updated Every Day\", style = dashed];");
await writer.WriteLineAsync(" e->f[label = \"Disabled/Updated On-demand\", style = dotted];");
await writer.WriteLineAsync(" }");
await writer.WriteLineAsync("}");
}
}
/// <summary>
/// Log the graph in graphviz (dot) format.
/// </summary>
/// <param name="graph">Graph to log</param>
/// <remarks>
/// Example of a graphviz graph description
///
/// digraph graphname {
/// a -> b -> c;
/// b -> d;
/// }
///
/// For more info see https://www.graphviz.org/
/// </remarks>
/// <returns>Async task</returns>
private async Task LogGraphViz(DependencyGraph graph)
{
using (StreamWriter writer = OutputHelpers.GetOutputFileStreamOrConsole(_options.GraphVizOutputFile))
{
await writer.WriteLineAsync("digraph repositoryGraph {");
await writer.WriteLineAsync(" node [shape=record]");
foreach (DependencyGraphNode node in graph.Nodes)
{
StringBuilder nodeBuilder = new StringBuilder();
// First add the node name
nodeBuilder.Append($" {OutputHelpers.CalculateGraphVizNodeName(node)}");
// Then add the label. label looks like [label="<info here>"]
nodeBuilder.Append("[label=\"");
// Append friendly repo name
nodeBuilder.Append(OutputHelpers.GetSimpleRepoName(node.Repository));
nodeBuilder.Append(@"\n");
// Append short commit sha
nodeBuilder.Append(node.Commit.Substring(0, node.Commit.Length < 10 ? node.Commit.Length : 10));
// Append a build string (with newline) if available
if (node.ContributingBuilds != null && node.ContributingBuilds.Any())
{
Build newestBuild = node.ContributingBuilds.OrderByDescending(b => b.DateProduced).First();
nodeBuilder.Append($"\\n{newestBuild.DateProduced.ToString("g")} (UTC)");
}
// Append a diff string if the graph contains diff info.
GitDiff diffFrom = node.DiffFrom;
if (diffFrom != null)
{
if (!diffFrom.Valid)
{
nodeBuilder.Append("\\ndiff unknown");
}
else if (diffFrom.Ahead != 0 || diffFrom.Behind != 0)
{
if (node.DiffFrom.Ahead != 0)
{
nodeBuilder.Append($"\\nahead: {node.DiffFrom.Ahead} commits");
}
if (node.DiffFrom.Behind != 0)
{
nodeBuilder.Append($"\\nbehind: {node.DiffFrom.Behind} commits");
}
}
else
{
nodeBuilder.Append("\\nlatest");
}
}
// Append end of label and end of node.
nodeBuilder.Append("\"];");
// Write it out.
await writer.WriteLineAsync(nodeBuilder.ToString());
// Now write the edges
foreach (DependencyGraphNode childNode in node.Children)
{
await writer.WriteLineAsync($" {OutputHelpers.CalculateGraphVizNodeName(node)} -> {OutputHelpers.CalculateGraphVizNodeName(childNode)}");
}
}
await writer.WriteLineAsync("}");
}
}