private async Task DoSearch(NuGetFactory factory, D3DependencyChild current,
int maxLevel,
PackageIdentity package, NuGetFramework fx)
{
if (current.Level > maxLevel)
{
return;
}
// same package may be traversed multiple times, so we can cache it
// don't cache the tree as depth may change for the same package
SourcePackageDependencyInfo packageDependencyInfo = await CacheResolvePackage(factory, package, fx);
if (packageDependencyInfo.Dependencies.Any())
{
if (current.children == null)
{
current.children = new List<D3DependencyChild>();
}
foreach (var dependency in packageDependencyInfo.Dependencies)
{
// unlikely that the version of a particular dependency will change in 30 minutes
// so we can cache it
IEnumerable<NuGetVersion> allVersions = await CacheGetAllVersionsOfDependency(factory, dependency);
if (allVersions.Any())
{
var bestMatch = dependency.VersionRange.FindBestMatch(allVersions);
var child = new D3DependencyChild
{
key = dependency.Id,
version = bestMatch.Version.ToString(),
parent = current.key,
Level = current.Level + 1
};
current.children.Add(child);
var nextPackage = new PackageIdentity(child.key, bestMatch);
await DoSearch(factory, child, maxLevel, nextPackage, fx);
}
}
}
}
public async Task<D3DependencyChild> ViewDependencies(string packageID, string packageVersion, string source,
string framework, string frameworkVersion, string frameworkProfile, int maxLevel = 3)
{
if (string.IsNullOrEmpty(packageID))
throw new ArgumentNullException("packageID");
if (string.IsNullOrEmpty(packageVersion))
throw new ArgumentNullException("packageVersion");
if (string.IsNullOrEmpty(source))
throw new ArgumentNullException("source");
if (string.IsNullOrEmpty(framework))
throw new ArgumentNullException("framework");
if (string.IsNullOrEmpty(frameworkVersion))
throw new ArgumentNullException("frameworkVersion");
var factory = new NuGetFactory(source);
NuGetFramework fx = new NuGetFramework(framework, Version.Parse(frameworkVersion), frameworkProfile);
PackageIdentity package = new PackageIdentity(packageID, NuGetVersion.Parse(packageVersion));
var root = new D3DependencyChild
{
key = packageID,
version = packageVersion,
Level = 0
};
await DoSearch(factory, root, maxLevel, package, fx);
return root;
}