internal IRequest ExtendRequest(RequestImpl requestImpl, params object[] objects)
{
var baseGetMessageString = requestImpl.As <GetMessageString>();
return(requestImpl.Extend <IRequest>(new {
// check the caller's resource manager first, then fall back to this resource manager
GetMessageString = new Func <string, string>((s) => baseGetMessageString(s) ?? Messages.ResourceManager.GetString(s)),
}, objects, AdditionalImplementedFunctions));
}
public bool RequirePackageProvider(string requestor, string packageProviderName, string minimumVersion, IRequestObject requestObject)
{
// check if the package provider is already installed
if (_packageProviders.ContainsKey(packageProviderName))
{
var current = _packageProviders[packageProviderName].Version;
if (current >= minimumVersion)
{
return(true);
}
}
var request = requestObject.As <IRequest>();
var currentCallCount = request.CallCount();
if (_lastCallCount >= currentCallCount)
{
// we've already been here this call.
// are they asking for the same provider again?
if (_providersTriedThisCall.Contains(packageProviderName))
{
request.Debug("Skipping RequirePackageProvider -- tried once this call previously.");
return(false);
}
// remember this in case we come back again.
_providersTriedThisCall.Add(packageProviderName);
}
else
{
_lastCallCount = currentCallCount;
_providersTriedThisCall = new HashSet <string> {
packageProviderName
};
}
if (!request.IsInteractive())
{
request.Debug("Skipping RequirePackageProvider due to not interactive");
// interactive indicates that the host can respond to queries -- this doesn't happen
// in powershell during tab-completion.
return(false);
}
// no?
// ask the bootstrap provider if there is a package provider with that name available.
var bootstrap = _packageProviders["Bootstrap"];
if (bootstrap == null)
{
request.Debug("Skipping RequirePackageProvider due to missing bootstrap provider");
return(false);
}
var pkg = bootstrap.FindPackage(packageProviderName, null, minimumVersion, null, 0, requestObject).ToArray();
if (pkg.Length == 1)
{
// Yeah? Install it.
var package = pkg[0];
var metaWithProviderType = pkg[0].Meta.FirstOrDefault(each => each.ContainsKey("providerType"));
var providerType = metaWithProviderType == null ? "unknown" : metaWithProviderType["providerType"];
var destination = providerType == "assembly" ? (AdminPrivilege.IsElevated ? SystemAssemblyLocation : UserAssemblyLocation) : string.Empty;
var link = package.Links.FirstOrDefault(each => each.Relationship == "installationmedia");
var location = string.Empty;
if (link != null)
{
location = link.HRef;
}
// what can't find an installationmedia link?
// todo: what should we say here?
if (request.ShouldBootstrapProvider(requestor, pkg[0].Name, pkg[0].Version, providerType, location, destination))
{
var newRequest = requestObject.Extend <IRequest>(new {
GetOptionValues = new Func <string, IEnumerable <string> >(key => {
if (key == "DestinationPath")
{
return(new[] {
destination
});
}
return(new string[0]);
})
});
var packagesInstalled = bootstrap.InstallPackage(pkg[0], newRequest).LastOrDefault();
if (packagesInstalled == null)
{
// that's sad.
request.Error(Constants.Messages.FailedProviderBootstrap, ErrorCategory.InvalidOperation.ToString(), package.Name, request.FormatMessageString(Constants.Messages.FailedProviderBootstrap, package.Name));
return(false);
}
// so it installed something
// we must tell the plugin loader to reload the plugins again.
LoadProviders(request);
return(true);
}
}
return(false);
}