/// <summary>
/// Finds the package matching the given atom.
/// </summary>
/// <param name="atom">an atom</param>
/// <returns>the matching package, or NULL if no match is found</returns>
protected virtual IPackage ResolvePackage(Atom atom)
{
ReadOnlyCollection<IPackage> pkglst = this.Packages;
IPackage pkg = null;
if (atom.IsFullName) {
pkg = pkglst
.Where(i => i.FullName == atom.PackageName)
.SingleOrDefault();
} else {
IPackage[] pkgarr = pkglst
.Where(i => i.Name == atom.PackageName)
.ToArray();
if (pkgarr.Length == 1) /* one match found */
pkg = pkgarr[0];
else if (pkgarr.Length > 1) /* multiple matches found */
throw new AmbiguousMatchException(atom.PackageName);
}
return pkg;
}
/// <summary>
/// Determines if the given atom matches the constraints of this atom.
/// </summary>
/// <param name="left">the atom to compare to</param>
/// <returns>true on match, false otherwise</returns>
/// <remarks>
/// Evaluation uses the input as the left side of the equation and this
/// instance as the right side.
///
/// Example:
/// "this" is >=foo/bar-123
/// "left" is foo/bar-124
///
/// foo/bar-124 >= foo/bar-123
///
/// In this case the match will succeed. If "this" doesn't have a
/// comparison operator set, then the package names are compared
/// for equality and version is ignored. The comparison operator for
/// "left" is always ignored.
///
/// If either atom doesn't have a version then version matching is
/// skipped. Slots are only compared if both sides have slots but
/// no versions.
/// </remarks>
public bool Match(Atom left)
{
if (this.IsFullName && left.IsFullName && left.PackageName != _pkg)
return false;
else if (left.PackagePart != this.PackagePart)
return false;
bool lnoverslot = (!left.HasVersion && left.Slot == 0);
bool rnoverslot = (!this.HasVersion && _slot == 0);
if (lnoverslot || rnoverslot || _oper == null)
return true;
else if (!left.HasVersion || !this.HasVersion) {
return left.Slot == _slot;
} else if (_oper == "=" && left.Version == _ver)
return true;
else if (_oper == "<" && left.Version < _ver)
return true;
else if (_oper == "<=" && left.Version <= _ver)
return true;
else if (_oper == ">" && left.Version > _ver)
return true;
else if (_oper == ">=" && left.Version >= _ver)
return true;
else if (_oper == "!" && left.Version != _ver)
return true;
return false;
}
/// <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>
/// Gets the package distribution referenced by the given atom.
/// If multiple distributions match, then the latest version is
/// returned.
/// </summary>
/// <param name="atom">the package atom to lookup</param>
/// <returns>the matching distribution</returns>
public virtual IDistribution Lookup(Atom atom)
{
return this.LookupAll(atom)
.OrderBy(i => i.Version)
.Last();
}
/// <summary>
/// Determines if files in the image directory would collide with existing
/// files owned by other packages.
/// </summary>
/// <param name="imgdir">image directory</param>
/// <param name="atom">package atom to test</param>
/// <returns>true if collisions are detected, false otherwise</returns>
private bool DetectCollisions(DirectoryInfo imgdir, Atom atom)
{
int striplev = imgdir.FullName.TrimEnd('\\').Count(i => i == '\\') + 1;
string[] files = imgdir
.GetFileSystemInfos("*", SearchOption.AllDirectories)
.Where(i => (i.Attributes & FileAttributes.Directory) != FileAttributes.Directory)
.Select(i => String.Join("\\", i.FullName.Split('\\').Skip(striplev)))
.Select(i => _cfg.RootDir.FullName.TrimEnd('\\') + @"\" + i)
.ToArray();
string[] collisions = _pkgmgr.CheckFilesOwner(files, atom);
bool protect = false;
foreach (string file in collisions)
_log.ErrorFormat("File '{0}' is already owned by a package", file);
foreach (string file in files) {
if (this.IsProtected(file)) {
_log.ErrorFormat("File '{0}' is protected by the system profile", file);
protect = true;
}
}
return (collisions.Length > 0 || protect);
}
/// <summary>
/// Unmerges the packages matching the given atoms.
/// </summary>
/// <param name="atomarr">package atoms for unmerging</param>
public void Unmerge(Atom[] atomarr)
{
foreach (Atom atom in atomarr) {
UnmergeEventArgs uae = new UnmergeEventArgs();
uae.Package = atom;
if (_pkgmgr.IsProtected(atom))
throw new ProtectedPackageException(atom.ToString());
if (this.OnUnmerge != null)
this.OnUnmerge.Invoke(this, uae);
IInstallProject installer = _pkgmgr.GetPackageInstaller(atom);
if (installer != null && installer.HasPkgPreRmTarget) {
_log.Info("Executing pre-removal tasks...");
installer.PkgPreRm();
}
FileTuple[] files = _pkgmgr.QueryPackageFiles(atom)
.OrderByDescending(i => i.Item1)
.ToArray();
IntPtr wow64oldval = IntPtr.Zero;
if (Environment.Is64BitOperatingSystem && !Environment.Is64BitProcess) {
if (!Wow64DisableWow64FsRedirection(out wow64oldval))
throw new InstallException("Failed to disable Wow64 file system redirection.");
}
foreach (FileTuple ft in files) {
try {
if (ft.Item2 == FileType.Directory && this.IsProtected(ft.Item1)) {
_log.DebugFormat("Skipping protected directory '{0}'", ft.Item1);
continue;
}
if (ft.Item2 == FileType.Directory) {
if (Directory.GetFiles(ft.Item1).Length > 0)
throw new IOException();
Directory.Delete(ft.Item1);
_log.InfoFormat("Deleted directory '{0}'", ft.Item1);
} else {
File.Delete(ft.Item1);
_log.InfoFormat("Deleted file '{0}'", ft.Item1);
}
} catch (DirectoryNotFoundException) {
_log.DebugFormat("Skipping non-existant directory '{0}'", ft.Item1);
} catch (FileNotFoundException) {
_log.DebugFormat("Skipping non-existant file '{0}'", ft.Item1);
} catch {
TrashWorker.AddFile(ft.Item1, _pkgmgr);
_log.WarnFormat("Marked '{0}' for future removal", ft.Item1);
}
}
if (Environment.Is64BitOperatingSystem && !Environment.Is64BitProcess)
Wow64RevertWow64FsRedirection(wow64oldval);
if (installer != null && installer.HasPkgPostRmTarget) {
_log.Info("Executing post-removal tasks...");
installer.PkgPostRm();
}
_pkgmgr.DeletePackage(atom);
Atom worldatom = Atom.Parse(atom.PackageName, AtomParseOptions.WithoutVersion);
if (_pkgmgr.FindPackages(worldatom).Length == 0)
_pkgmgr.DeselectPackage(worldatom);
}
if (this.OnAutoClean != null)
this.OnAutoClean.Invoke(this, new EventArgs());
TrashWorker.Purge(_pkgmgr);
}
/// <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;
}
