internal IEnumerable <PackageItem> GetUninstalledPackageDependencies(PackageItem packageItem)
{
foreach (var depSet in packageItem.Package.DependencySets)
{
foreach (var dep in depSet.Dependencies)
{
// get all the packages that match this dependency
var depRefs = dep.VersionSpec == null?GetPackageById(dep.Id).ToArray() : GetPackageByIdAndVersionSpec(dep.Id, dep.VersionSpec, true).ToArray();
if (depRefs.Length == 0)
{
Error(ErrorCategory.ObjectNotFound, packageItem.GetCanonicalId(this), Constants.Messages.DependencyResolutionError, GetCanonicalPackageId(ProviderName, dep.Id, ((object)dep.VersionSpec ?? "").ToString()));
throw new Exception("failed");
}
if (depRefs.Any(each => IsPackageInstalled(each.Id, each.Version)))
{
// we have a compatible version installed.
continue;
}
yield return(depRefs[0]);
// it's not installed. return this as a needed package, but first, get it's dependencies.
foreach (var nestedDep in GetUninstalledPackageDependencies(depRefs[0]))
{
yield return(nestedDep);
}
}
}
}
internal bool InstallSinglePackage(PackageItem packageItem)
{
// Get NuGet to install the Package
PreInstall(packageItem);
var results = NuGetInstall(packageItem);
if (results.Status == InstallStatus.Successful)
{
foreach (var installedPackage in results[InstallStatus.Successful])
{
if (!NotifyPackageInstalled(installedPackage.Id, installedPackage.Version, installedPackage.PackageSource.Name, installedPackage.FullPath))
{
// the caller has expressed that they are cancelling the install.
Verbose("NotifyPackageInstalled returned false--This is unexpected");
// todo: we should probablty uninstall this package unless the user said leave broken stuff behind
return(false);
}
// run any extra steps
if (!PostInstall(installedPackage))
{
// package failed installation. uninstall it.
UninstallPackage(installedPackage);
return(false);
}
YieldPackage(packageItem, packageItem.PackageSource.Name);
// yay!
}
return(true);
}
if (results.Status == InstallStatus.AlreadyPresent)
{
// hmm Weird.
Verbose("Skipped Package '{0} v{1}' already installed", packageItem.Id, packageItem.Version);
return(true);
}
Error(ErrorCategory.InvalidResult, packageItem.GetCanonicalId(this), MultiplePackagesInstalledExpectedOne, packageItem.GetCanonicalId(this));
return(false);
}