private bool PerformTreeFiltering(SimpleCommit commit, out Tree newTree)
{
newTree = null;
if (hasTreeFiltering)
{
// clear the cache of entries to keep and the tasks to run
entriesToKeep.Clear();
// Process white list
if (keepPathPatterns.Count == 0)
{
KeepAllEntries(commit.Tree);
}
else
{
KeepEntries(commit, commit.Tree);
}
ProcessPendingTasks();
// Process black list
if (removePathPatterns.Count > 0)
{
RemoveEntries(commit);
ProcessPendingTasks();
}
// If the commit was discarded by a tree-filtering, we need to skip it also here
if (commit.Discard || entriesToKeep.Count == 0)
{
commit.Discard = true;
// Store that this commit was discarded (used for re-parenting commits)
commitsDiscarded.Add(commit.Sha);
return(true);
}
// Rebuild a new tree based on the list of entries to keep
var treeDef = new TreeDefinition();
foreach (var entryIt in entriesToKeep)
{
var entry = entryIt.Key;
var entryValue = entryIt.Value;
if (entryValue.Blob != null)
{
treeDef.Add(entry.Path, entryValue.Blob, entryValue.Mode);
}
else
{
treeDef.Add(entry.Path, entry);
}
}
newTree = repo.ObjectDatabase.CreateTree(treeDef);
}
else
{
// If we don't have any tree filtering, just use the original tree
newTree = commit.Tree;
}
return(false);
}
/// <summary>
/// Maps the specified commit to an already mapped commit.
/// </summary>
/// <param name="commit">The commit.</param>
/// <returns>The new commit that has been mapped.</returns>
/// <exception cref="System.ArgumentNullException">commit</exception>
public SimpleCommit Map(SimpleCommit commit)
{
if (commit == null)
{
throw new ArgumentNullException("commit");
}
return(rocketFilterApp.GetMapCommit(commit));
}
private void RemoveEntries(SimpleCommit commit)
{
var entries = entriesToKeep.ToList();
foreach (var entry in entries)
{
KeepEntry(commit, entry.Key, removePathPatterns, false);
}
}
internal SimpleCommit GetMapCommit(SimpleCommit commit)
{
Commit rewritten;
if (commitMap.TryGetValue(commit.Id.Sha, out rewritten))
{
return(GetSimpleCommit(rewritten));
}
return(null);
}
internal SimpleCommit GetSimpleCommit(Commit commit)
{
SimpleCommit simpleCommit;
lock (simpleCommits)
{
if (!simpleCommits.TryGetValue(commit, out simpleCommit))
{
simpleCommit = new SimpleCommit(this, commit);
simpleCommits.Add(commit, simpleCommit);
}
}
return(simpleCommit);
}
private bool PerformCommitFiltering(SimpleCommit commit)
{
if (commitFilteringCallback != null)
{
// Filter this commit
commitFilteringCallback(repo, commit);
if (commit.Discard)
{
// Store that this commit was discarded (used for reparenting commits)
commitsDiscarded.Add(commit.Sha);
return(true);
}
}
return(false);
}
private void KeepEntry(SimpleCommit commit, TreeEntry entry, PathPatterns globalPattern, bool keepOnIgnore)
{
// Early exit if the commit was discarded by a tree-filtering
if (commit.Discard)
{
return;
}
PathMatch match;
var path = entry.Path;
if (TryMatch(path, globalPattern, out match))
{
// If path is ignored we can update the entries to keep
if (match.IsIgnored)
{
DirectMatch(commit, entry, keepOnIgnore, ref match);
}
}
else
{
var checkTask = Task.Factory.StartNew(() =>
{
Match(path, globalPattern, ref match);
// If path is ignored we can update the entries to keep
if (match.IsIgnored)
{
DirectMatch(commit, entry, keepOnIgnore, ref match);
}
});
if (DisableTasks)
{
checkTask.RunSynchronously();
}
else
{
lock (pendingTasks)
{
pendingTasks.Add(checkTask);
}
}
}
}
private void DirectMatch(SimpleCommit commit, TreeEntry entry, bool keepOnIgnore, ref PathMatch match)
{
// If callback return false, then we don't update entries to keep or delete
SimpleEntry simpleEntry;
var pattern = match.Pattern;
var callback = pattern.Callback;
if (callback != null)
{
simpleEntry = new SimpleEntry(repo, entry);
simpleEntry.Discard = !keepOnIgnore;
// Calls the script
callback(repo, pattern.Path, commit, ref simpleEntry);
// Skip if this commit is discarded by the tree filtering
// Skip if this entry was discarded
if (commit.Discard || (simpleEntry.Discard == keepOnIgnore))
{
return;
}
}
else
{
simpleEntry = default(SimpleEntry);
}
// We can update entries to keep
lock (entriesToKeep)
{
if (keepOnIgnore)
{
entriesToKeep.Add(entry, simpleEntry.NewEntryValue);
}
else
{
entriesToKeep.Remove(entry);
}
}
}
private void KeepEntries(SimpleCommit commit, Tree tree)
{
// Early exit if the commit was discarded by a tree-filtering
if (commit.Discard)
{
return;
}
var task = Task.Factory.StartNew(() =>
{
foreach (var entryIt in tree)
{
var entry = entryIt;
if (entry.TargetType == TreeEntryTargetType.Tree)
{
var subTree = (Tree)entry.Target;
KeepEntries(commit, subTree);
}
else if (entry.TargetType == TreeEntryTargetType.Blob || IncludeLinks)
{
KeepEntry(commit, entry, keepPathPatterns, true);
}
}
});
if (DisableTasks)
{
task.RunSynchronously();
}
else
{
lock (pendingTasks)
{
pendingTasks.Add(task);
}
}
}
/// <summary>
/// Processes a commit.
/// </summary>
/// <param name="commit">The commit.</param>
private void ProcessCommit(SimpleCommit commit)
{
// ------------------------------------
// commit-filtering
// ------------------------------------
if (PerformCommitFiltering(commit))
{
return;
}
// Map parents of previous commit to new parents
// Check if at least a parent has the same tree, if yes, we don't need to create a new commit
Commit newCommit = null;
Tree newTree;
// ------------------------------------
// tree-filtering
// ------------------------------------
if (PerformTreeFiltering(commit, out newTree))
{
return;
}
// Process parents
var newParents = new List <Commit>();
bool hasOriginalParents = false;
bool treePruned = false;
foreach (var parent in commit.Parents)
{
// Find a non discarded parent
var remapParent = FindRewrittenParent(parent);
// If remap parent is null, we can skip it
if (remapParent == null)
{
continue;
}
// If parent is same, then it is an original parent that can be detached by DetachFirstCommits
hasOriginalParents = parent.GitCommit == remapParent;
newParents.Add(remapParent);
// If parent tree is equal, we can prune this commit
if (!treePruned && remapParent.Tree.Id == newTree.Id)
{
newCommit = remapParent;
commitsDiscarded.Add(commit.Sha);
treePruned = true;
}
}
// If we detach first commits from their parents
if (DetachFirstCommits && hasOriginalParents)
{
// Remove original parents
foreach (var parent in commit.Parents)
{
newParents.Remove(parent.GitCommit);
}
}
// If we need to create a new commit (new tree)
if (newCommit == null)
{
var author = new Signature(commit.AuthorName, commit.AuthorEmail, commit.AuthorDate);
var committer = new Signature(commit.CommitterName, commit.CommitterEmail, commit.CommitterDate);
newCommit = repo.ObjectDatabase.CreateCommit(author, committer, commit.Message,
newTree,
newParents, false);
}
// Store the remapping between the old commit and the new commit
commitMap.Add(commit.Sha, newCommit);
// Store the last commit
lastCommit = newCommit;
}
/// <summary>
/// Maps the specified commit to an already mapped commit.
/// </summary>
/// <param name="commit">The commit.</param>
/// <returns>The new commit that has been mapped.</returns>
/// <exception cref="System.ArgumentNullException">commit</exception>
public SimpleCommit Map(SimpleCommit commit)
{
if (commit == null) throw new ArgumentNullException("commit");
return rocketFilterApp.GetMapCommit(commit);
}
