/// <summary>
/// Get available provider if -ListAvailable present;load a provider specified in providerName.
/// </summary>
/// <param name="request"></param>
/// <param name="providerName">provider to be loaded.</param>
/// <param name="powerShellMetaProvider"></param>
private IEnumerable<PackageProvider> GetAvailableProvider(IHostApi request, string providerName, IMetaProvider powerShellMetaProvider)
{
var results = _packageProviders.Values.Where(each => each.ProviderName.IsWildcardMatch(providerName)).ReEnumerable();
if (results.Any()) {
//the provider is already loaded and tracked in the loaded master list: _packageProviders
yield break;
}
//Get available powershell providers
var availableProviders = powerShellMetaProvider.GetAvailableLocallyProviders(request.As<IRequest>()).ReEnumerable();
if (!availableProviders.Any()) {
//No available providers.
if (!String.IsNullOrWhiteSpace(providerName)) {
//Error out if a user specific -Name
request.Error(Constants.Messages.UnknownProvider, ErrorCategory.InvalidOperation.ToString(),
providerName, request.FormatMessageString(Constants.Messages.UnknownProvider, providerName));
}
yield break;
}
if (String.IsNullOrWhiteSpace(providerName)) {
// "-Name" does not exist, we return all we can find
foreach (var module in availableProviders) {
yield return new PackageProvider(module.As<DefaultPackageProvider>());
}
} else {
//A user inputs both -Name and -ListAvailable
var matches = powerShellMetaProvider.GetProviderNames().Where(each => each.IsWildcardMatch(providerName)).ReEnumerable();
if (!matches.Any()) {
request.Error(Constants.Messages.UnknownProvider, ErrorCategory.InvalidOperation.ToString(),
providerName, request.FormatMessageString(Constants.Messages.UnknownProvider, providerName));
}
foreach (var match in matches) {
yield return new PackageProvider(powerShellMetaProvider.GetAvailableLocallyProvider(match).As<DefaultPackageProvider>());
//yield return new PackageProvider(availableProviders[match].As<DefaultPackageProvider>());
}
}
}
