private bool TryGetRunnerEx(string prerequisitePath, out string runnerPath)
{
runnerPath = null;
var runnerName = GetRunnerName();
Trace.Verbose("Prerequisite.TryGetRunnerEx: `{0}`", runnerName);
if (string.IsNullOrEmpty(prerequisitePath))
{
prerequisitePath = GetDefaultDownloadPath();
}
prerequisitePath = Path.Combine(prerequisitePath, Name);
Trace.Verbose("Prerequisite.TryGetRunnerEx: Looking for latest version at `{0}`...", prerequisitePath);
if (!Directory.Exists(prerequisitePath))
{
Trace.Verbose("Prerequisite.TryGetRunnerEx: No runner found.");
return(false);
}
var packageVersion2 = SemanticVersion.Version2;
string latestOriginal = null; // the latest found version including build meta-info
NuGet.SemanticVersion latest = null; // the latest parsed version w/o meta-info
foreach (var versionFolder in Directory.GetDirectories(prerequisitePath))
{
var sVer = Path.GetFileName(versionFolder);
Trace.Verbose("Prerequisite.TryGetRunnerEx: {0}", sVer);
var ver = NuGet.SemanticVersion.TryParse(sVer);
if (ver == null || ver.Version2 != packageVersion2)
{
continue;
}
if (latest == null || latest.CompareTo(ver) <= 0)
{
latestOriginal = sVer;
latest = ver;
}
}
if (latestOriginal != null)
{
runnerPath = Path.Combine(prerequisitePath, latestOriginal, runnerName);
Trace.Verbose("Prerequisite.TryGetRunnerEx: Checking `{0}`...", runnerPath);
return(File.Exists(runnerPath));
}
Trace.Verbose("Prerequisite.TryGetRunnerEx: No runner found.");
return(false);
}
protected PrerequisiteBase(string name, NuGet.SemanticVersion semanticVersion)
{
Name = name;
SemanticVersion = semanticVersion;
}