/// <summary>
/// Applies applicable transforms in order of sequenced patches.
/// </summary>
/// <param name="throwOnError">Whether to throw an exception if an error occurs.</param>
internal void Apply(bool throwOnError = false)
{
// Need to make a copy of the database since exclusivity is required.
IEnumerable <string> applicable = null;
using (var copy = Copy(this.db))
{
// Copy the items to a list so they are enumerated immediately and the temporary database can be closed.
applicable = this.sequencer.GetApplicablePatches(copy.FilePath).Select(patch => patch.Patch).ToList();
}
foreach (var path in applicable)
{
using (var patch = new PatchPackage(path))
{
var transforms = patch.GetValidTransforms(this.db);
foreach (var transform in transforms)
{
// GetValidTransforms does not return the patch transform so assume it too is valid.
foreach (var prefix in PatchApplicator.TransformPrefixes)
{
var temp = Path.ChangeExtension(Path.GetTempFileName(), ".mst");
patch.ExtractTransform(prefix + transform, temp);
// Apply and commit the authored transform so further transforms may apply.
this.db.ApplyTransform(temp, PatchApplicator.IgnoreErrors);
this.db.ApplyTransform(temp, PatchApplicator.IgnoreErrors | TransformErrors.ViewTransform);
this.db.Commit();
// Attempt to delete the temporary transform.
TryDelete(temp);
}
}
}
}
}
