private static async Task DoLatestInChannelGraphNodeDiffAsync(
IRemoteFactory remoteFactory,
ILogger logger,
Dictionary <string, DependencyGraphNode> nodeCache,
Dictionary <string, DependencyGraphNode> visitedRepoUriNodes)
{
logger.LogInformation("Running latest in channel node diff.");
IRemote barOnlyRemote = await remoteFactory.GetBarOnlyRemoteAsync(logger);
// Walk each node in the graph and diff against the latest build in the channel
// that was also applied to the node.
Dictionary <string, string> latestCommitCache = new Dictionary <string, string>();
foreach (DependencyGraphNode node in nodeCache.Values)
{
// Start with an unknown diff.
node.DiffFrom = GitDiff.UnknownDiff();
if (node.ContributingBuilds.Any())
{
// Choose latest build of node that has a channel.
Build newestBuildWithChannel = node.ContributingBuilds.OrderByDescending(b => b.DateProduced).FirstOrDefault(
b => b.Channels != null && b.Channels.Any());
// If no build was found (e.g. build was flowed without a channel or channel was removed from
// a build, then no diff from latest.
if (newestBuildWithChannel != null)
{
int channelId = newestBuildWithChannel.Channels.First().Id;
// Just choose the first channel. This algorithm is mostly just heuristic.
string latestCommitKey = $"{node.Repository}@{channelId}";
string latestCommit = null;
if (!latestCommitCache.TryGetValue(latestCommitKey, out latestCommit))
{
// Look up latest build in the channel
var latestBuild = await barOnlyRemote.GetLatestBuildAsync(node.Repository, channelId);
// Could be null, if the only build was removed from the channel
if (latestBuild != null)
{
latestCommit = latestBuild.Commit;
}
// Add to cache
latestCommitCache.Add(latestCommitKey, latestCommit);
}
// Perform diff if there is a latest commit.
if (!string.IsNullOrEmpty(latestCommit))
{
IRemote repoRemote = await remoteFactory.GetRemoteAsync(node.Repository, logger);
// This will return a no-diff if latestCommit == node.Commit
node.DiffFrom = await repoRemote.GitDiffAsync(node.Repository, latestCommit, node.Commit);
}
}
}
}
}
/// <summary>
/// Diff each node in the graph against the latest build in
/// the graph.
/// </summary>
/// <param name="remoteFactory"></param>
/// <param name="logger"></param>
/// <param name="nodeCache"></param>
/// <param name="visitedRepoUriNodes"></param>
/// <returns></returns>
private static async Task DoLatestInGraphNodeDiffAsync(
IRemoteFactory remoteFactory,
ILogger logger,
Dictionary <string, DependencyGraphNode> nodeCache,
Dictionary <string, DependencyGraphNode> visitedRepoUriNodes)
{
logger.LogInformation("Running latest in graph node diff.");
// Find the build of each repo in the graph, then
// get the diff info from the latest
foreach (string repo in visitedRepoUriNodes.Keys)
{
// Get all nodes with this value
List <DependencyGraphNode> nodes = nodeCache.Values.Where(n => n.Repository == repo).ToList();
// If only one, determine latest
if (nodes.Count > 1)
{
// Find latest
DependencyGraphNode newestNode = null;
Build newestBuild = null;
foreach (DependencyGraphNode node in nodes)
{
if (newestNode == null)
{
newestNode = node;
if (newestNode.ContributingBuilds.Any())
{
newestBuild = newestNode.ContributingBuilds.OrderByDescending(b => b.DateProduced).First();
}
}
else if (node.ContributingBuilds.Any(b => b.DateProduced > newestBuild?.DateProduced))
{
newestNode = node;
newestBuild = newestNode.ContributingBuilds.OrderByDescending(b => b.DateProduced).First();
}
}
// Compare all other nodes to the latest
foreach (DependencyGraphNode node in nodes)
{
IRemote repoRemote = await remoteFactory.GetRemoteAsync(node.Repository, logger);
// If node == newestNode, returns no diff.
node.DiffFrom = await repoRemote.GitDiffAsync(node.Repository, newestNode.Commit, node.Commit);
}
}
else
{
DependencyGraphNode singleNode = nodes.Single();
singleNode.DiffFrom = GitDiff.NoDiff(singleNode.Commit);
}
}
}