private async Task <bool> UpdateNeeded(string targetVersion, CancellationToken token)
{
// when talk to old version tfs server, always prefer latest package.
// old server won't send target version as part of update message.
if (string.IsNullOrEmpty(targetVersion))
{
var packages = await _agentServer.GetPackagesAsync(_packageType, _platform, 1, token);
if (packages == null || packages.Count == 0)
{
Trace.Info($"There is no package for {_packageType} and {_platform}.");
return(false);
}
_targetPackage = packages.FirstOrDefault();
}
else
{
_targetPackage = await _agentServer.GetPackageAsync(_packageType, _platform, targetVersion, token);
if (_targetPackage == null)
{
Trace.Info($"There is no package for {_packageType} and {_platform} with version {targetVersion}.");
return(false);
}
}
Trace.Info($"Version '{_targetPackage.Version}' of '{_targetPackage.Type}' package available in server.");
PackageVersion serverVersion = new PackageVersion(_targetPackage.Version);
Trace.Info($"Current running agent version is {BuildConstants.AgentPackage.Version}");
PackageVersion agentVersion = new PackageVersion(BuildConstants.AgentPackage.Version);
return(serverVersion.CompareTo(agentVersion) > 0);
}
private async Task <bool> UpdateNeeded(string targetVersion, CancellationToken token)
{
// when talk to old version tfs server, always prefer latest package.
// old server won't send target version as part of update message.
if (string.IsNullOrEmpty(targetVersion))
{
var packages = await _agentServer.GetPackagesAsync(_packageType, _platform, 1, token);
if (packages == null || packages.Count == 0)
{
Trace.Info($"There is no package for {_packageType} and {_platform}.");
return(false);
}
_targetPackage = packages.FirstOrDefault();
}
else
{
_targetPackage = await _agentServer.GetPackageAsync(_packageType, _platform, targetVersion, token);
if (_targetPackage == null)
{
Trace.Info($"There is no package for {_packageType} and {_platform} with version {targetVersion}.");
return(false);
}
}
Trace.Info($"Version '{_targetPackage.Version}' of '{_targetPackage.Type}' package available in server.");
PackageVersion serverVersion = new PackageVersion(_targetPackage.Version);
Trace.Info($"Current running agent version is {BuildConstants.AgentPackage.Version}");
PackageVersion agentVersion = new PackageVersion(BuildConstants.AgentPackage.Version);
if (serverVersion.CompareTo(agentVersion) > 0)
{
return(true);
}
if (AgentKnobs.DisableAgentDowngrade.GetValue(_knobContext).AsBoolean())
{
Trace.Info("Agent downgrade disabled, skipping update");
return(false);
}
// Always return true for newer agent versions unless they're exactly equal to enable auto rollback (this feature was introduced after 2.165.0)
if (serverVersion.CompareTo(agentVersion) != 0)
{
_terminal.WriteLine(StringUtil.Loc("AgentDowngrade"));
return(true);
}
return(false);
}