/// <summary>
/// Gets all package distributions referenced by the given atom.
/// </summary>
/// <param name="atom">the package atom to lookup</param>
/// <returns>the matching distributions</returns>
public virtual IDistribution[] LookupAll(Atom atom)
{
IPackage pkg = this.ResolvePackage(atom);
List<IDistribution> results = new List<IDistribution>();
if (pkg == null)
throw new PackageNotFoundException(atom.PackageName);
if (atom.HasVersion || atom.Slot > 0) { /* find a specific version */
IDistribution[] matcharr = pkg.Distributions
.Where(i => atom.Match(i.Atom))
.OrderBy(i => i.Version)
.ToArray();
if (matcharr.Length == 0)
throw new DistributionNotFoundException(atom);
if (atom.Comparison == "=")
results.Add(matcharr.SingleOrDefault());
else {
IDistribution[] unmasked = matcharr
.Where(i => !i.PortsTree.IsMasked(i))
.ToArray();
results.AddRange(unmasked.Length > 0 ? unmasked : matcharr);
}
} else { /* find the best version */
if (pkg.LatestUnmasked != null)
results.Add(pkg.LatestUnmasked);
else if (pkg.LatestAvailable != null)
results.Add(pkg.LatestAvailable);
}
if (results.Count == 0)
throw new DistributionNotFoundException(atom);
return results.ToArray();
}
/// <summary>
/// Determines if the given distribution satisfies dependency requirements for
/// the current graph.
/// </summary>
/// <param name="dist">distribution atom to check</param>
/// <returns>true if satisfies, false otherwise</returns>
public bool CheckSatisfies(Atom atom)
{
if (!_depmap.ContainsKey(atom.PackageName))
throw new KeyNotFoundException("Package '" + atom.PackageName + "' is not a dependency.");
/* the given dist satisfies the requirement if it appears in all matches found */
foreach (Dependency d in _depmap[atom.PackageName]) {
if (d.Matches.Where(i => atom.Match(d.Atom)).Count() == 0)
return false;
}
return true;
}
