/// <summary>
/// Determines compatibility between the current package installs and the specified target package.
/// Works for both updates and new installs.
/// </summary>
/// <param name="target"></param>
/// <returns></returns>
public PackageCompatibility GetCompatibilityLevel(PackageInfo target)
{
// If the target package is already installed in the matching version, assume compatibility
if (this.localPackages.Any(local => local.Id == target.Id && local.Version == target.Version))
{
return(PackageCompatibility.Definite);
}
// Determine all packages that might be updated or installed
PackageInfo[] touchedPackages = this.GetDeepDependencies(new[] { target }).ToArray();
// Generate a mapping to already installed packages
Dictionary <PackageInfo, LocalPackage> localMap = new Dictionary <PackageInfo, LocalPackage>();
foreach (PackageInfo package in touchedPackages)
{
LocalPackage local = this.localPackages.FirstOrDefault(p => p.Id == package.Id);
if (local == null)
{
continue;
}
localMap.Add(package, local);
}
// Determine the maximum version difference between target and installed
PackageCompatibility compatibility = PackageCompatibility.Definite;
foreach (var pair in localMap)
{
Version targetVersion = pair.Key.Version;
Version localVersion = pair.Value.Version;
if (localVersion.Major != targetVersion.Major)
{
compatibility = compatibility.Combine(PackageCompatibility.Unlikely);
}
else if (localVersion.Minor != targetVersion.Minor)
{
compatibility = compatibility.Combine(PackageCompatibility.Likely);
}
}
return(compatibility);
}
private bool ConfirmCompatibility(IEnumerable <PackageInfo> packages)
{
PackageCompatibility compatibility = PackageCompatibility.Definite;
foreach (PackageInfo package in packages)
{
PackageCompatibility otherCompat = this.packageManager.GetCompatibilityLevel(package);
compatibility = compatibility.Combine(otherCompat);
}
return(this.ConfirmCompatibility(compatibility));
}
/// <summary>
/// Determines compatibility between the current package installs and the specified target package.
/// Works for both updates and new installs.
/// </summary>
/// <param name="target"></param>
/// <returns></returns>
public PackageCompatibility GetCompatibilityLevel(PackageInfo target)
{
// If the target package is already installed in the matching version, assume compatibility
if (this.setup.GetPackage(target.Id, target.Version) != null)
{
return(PackageCompatibility.Definite);
}
// Determine all packages that might be updated or installed
this.dependencyWalker.Clear();
this.dependencyWalker.WalkGraph(target);
List <PackageInfo> touchedPackages = this.dependencyWalker.VisitedPackages.ToList();
// Verify properly specified dependencies for Duality packages
if (target.IsDualityPackage)
{
// If none of the targets deep dependencies is anyhow related to Duality, assume they're incomplete and potentially incompatible
bool anyDualityDependency = false;
foreach (PackageInfo package in touchedPackages)
{
if (DualityPackageNames.Any(name => string.Equals(name, package.Id)))
{
anyDualityDependency = true;
break;
}
}
if (!anyDualityDependency)
{
return(PackageCompatibility.None);
}
}
// Generate a mapping to already installed packages
Dictionary <PackageInfo, LocalPackage> localMap = new Dictionary <PackageInfo, LocalPackage>();
foreach (PackageInfo package in touchedPackages)
{
LocalPackage local = this.setup.GetPackage(package.Id);
if (local == null)
{
continue;
}
localMap.Add(package, local);
}
// Determine the maximum version difference between target and installed
PackageCompatibility compatibility = PackageCompatibility.Definite;
foreach (var pair in localMap)
{
Version targetVersion = pair.Key.Version;
Version localVersion = pair.Value.Version;
if (localVersion.Major != targetVersion.Major)
{
compatibility = compatibility.Combine(PackageCompatibility.Unlikely);
}
else if (localVersion.Minor != targetVersion.Minor)
{
compatibility = compatibility.Combine(PackageCompatibility.Likely);
}
}
return(compatibility);
}