/// <summary>
/// Perform a three-way merge of two commits, looking up their
/// commit ancestor. The returned index will contain the results
/// of the merge and can be examined for conflicts.
/// </summary>
/// <param name="ours">The first tree</param>
/// <param name="theirs">The second tree</param>
/// <param name="options">The <see cref="MergeTreeOptions"/> controlling the merge</param>
/// <param name="earlyStop">True if the merge stopped early due to conflicts</param>
/// <returns>The <see cref="IndexHandle"/> containing the merged trees and any conflicts</returns>
private IndexHandle MergeCommits(Commit ours, Commit theirs, MergeTreeOptions options, out bool earlyStop)
{
GitMergeFlag mergeFlags = GitMergeFlag.GIT_MERGE_NORMAL;
if (options.SkipReuc)
{
mergeFlags |= GitMergeFlag.GIT_MERGE_SKIP_REUC;
}
if (options.FindRenames)
{
mergeFlags |= GitMergeFlag.GIT_MERGE_FIND_RENAMES;
}
if (options.FailOnConflict)
{
mergeFlags |= GitMergeFlag.GIT_MERGE_FAIL_ON_CONFLICT;
}
var mergeOptions = new GitMergeOpts
{
Version = 1,
MergeFileFavorFlags = options.MergeFileFavor,
MergeTreeFlags = mergeFlags,
RenameThreshold = (uint)options.RenameThreshold,
TargetLimit = (uint)options.TargetLimit,
};
using (var oneHandle = Proxy.git_object_lookup(repo.Handle, ours.Id, GitObjectType.Commit))
using (var twoHandle = Proxy.git_object_lookup(repo.Handle, theirs.Id, GitObjectType.Commit))
{
var indexHandle = Proxy.git_merge_commits(repo.Handle, oneHandle, twoHandle, mergeOptions, out earlyStop);
return(indexHandle);
}
}
/// <summary>
/// Perform a three-way merge of two commits, looking up their
/// commit ancestor. The returned <see cref="MergeTreeResult"/> will contain the results
/// of the merge and can be examined for conflicts.
/// </summary>
/// <param name="ours">The first commit</param>
/// <param name="theirs">The second commit</param>
/// <param name="options">The <see cref="MergeTreeOptions"/> controlling the merge</param>
/// <returns>The <see cref="MergeTreeResult"/> containing the merged trees and any conflicts</returns>
public virtual MergeTreeResult MergeCommits(Commit ours, Commit theirs, MergeTreeOptions options)
{
Ensure.ArgumentNotNull(ours, "ours");
Ensure.ArgumentNotNull(theirs, "theirs");
var modifiedOptions = new MergeTreeOptions();
// We throw away the index after looking at the conflicts, so we'll never need the REUC
// entries to be there
modifiedOptions.SkipReuc = true;
if (options != null)
{
modifiedOptions.FailOnConflict = options.FailOnConflict;
modifiedOptions.FindRenames = options.FindRenames;
modifiedOptions.IgnoreWhitespaceChange = options.IgnoreWhitespaceChange;
modifiedOptions.MergeFileFavor = options.MergeFileFavor;
modifiedOptions.RenameThreshold = options.RenameThreshold;
modifiedOptions.TargetLimit = options.TargetLimit;
}
bool earlyStop;
using (var indexHandle = MergeCommits(ours, theirs, modifiedOptions, out earlyStop))
{
MergeTreeResult mergeResult;
// Stopped due to FailOnConflict so there's no index or conflict list
if (earlyStop)
{
return(new MergeTreeResult(new Conflict[] { }));
}
if (Proxy.git_index_has_conflicts(indexHandle))
{
List <Conflict> conflicts = new List <Conflict>();
Conflict conflict;
using (ConflictIteratorHandle iterator = Proxy.git_index_conflict_iterator_new(indexHandle))
{
while ((conflict = Proxy.git_index_conflict_next(iterator)) != null)
{
conflicts.Add(conflict);
}
}
mergeResult = new MergeTreeResult(conflicts);
}
else
{
var treeId = Proxy.git_index_write_tree_to(indexHandle, repo.Handle);
mergeResult = new MergeTreeResult(this.repo.Lookup <Tree>(treeId));
}
return(mergeResult);
}
}
/// <summary>
/// Returns whether merging <paramref name="one"/> into <paramref name="another"/>
/// would result in merge conflicts.
/// </summary>
/// <param name="one">The commit wrapping the base tree to merge into.</param>
/// <param name="another">The commit wrapping the tree to merge into <paramref name="one"/>.</param>
/// <returns>True if the merge does not result in a conflict, false otherwise.</returns>
public virtual bool CanMergeWithoutConflict(Commit one, Commit another)
{
Ensure.ArgumentNotNull(one, "one");
Ensure.ArgumentNotNull(another, "another");
var opts = new MergeTreeOptions()
{
SkipReuc = true,
FailOnConflict = true,
};
var result = repo.ObjectDatabase.MergeCommits(one, another, opts);
return(result.Status == MergeTreeStatus.Succeeded);
}
/// <summary>
/// Performs a cherry-pick of <paramref name="cherryPickCommit"/> onto <paramref name="cherryPickOnto"/> commit.
/// </summary>
/// <param name="cherryPickCommit">The commit to cherry-pick.</param>
/// <param name="cherryPickOnto">The commit to cherry-pick onto.</param>
/// <param name="mainline">Which commit to consider the parent for the diff when cherry-picking a merge commit.</param>
/// <param name="options">The options for the merging in the cherry-pick operation.</param>
/// <param name="earlyStop">True if the cherry-pick stopped early due to conflicts</param>
/// <returns>The <see cref="IndexHandle"/> containing the cherry-pick result tree and any conflicts</returns>
private IndexHandle CherryPickCommit(Commit cherryPickCommit, Commit cherryPickOnto, int mainline, MergeTreeOptions options, out bool earlyStop)
{
GitMergeFlag mergeFlags = GitMergeFlag.GIT_MERGE_NORMAL;
if (options.SkipReuc)
{
mergeFlags |= GitMergeFlag.GIT_MERGE_SKIP_REUC;
}
if (options.FindRenames)
{
mergeFlags |= GitMergeFlag.GIT_MERGE_FIND_RENAMES;
}
if (options.FailOnConflict)
{
mergeFlags |= GitMergeFlag.GIT_MERGE_FAIL_ON_CONFLICT;
}
var mergeOptions = new GitMergeOpts
{
Version = 1,
MergeFileFavorFlags = options.MergeFileFavor,
MergeTreeFlags = mergeFlags,
RenameThreshold = (uint)options.RenameThreshold,
TargetLimit = (uint)options.TargetLimit,
};
using (var cherryPickOntoHandle = Proxy.git_object_lookup(repo.Handle, cherryPickOnto.Id, GitObjectType.Commit))
using (var cherryPickCommitHandle = Proxy.git_object_lookup(repo.Handle, cherryPickCommit.Id, GitObjectType.Commit))
{
var indexHandle = Proxy.git_cherrypick_commit(repo.Handle, cherryPickCommitHandle, cherryPickOntoHandle, (uint)mainline, mergeOptions, out earlyStop);
return(indexHandle);
}
}
/// <summary>
/// Performs a cherry-pick of <paramref name="cherryPickCommit"/> onto <paramref name="cherryPickOnto"/> commit.
/// </summary>
/// <param name="cherryPickCommit">The commit to cherry-pick.</param>
/// <param name="cherryPickOnto">The commit to cherry-pick onto.</param>
/// <param name="mainline">Which commit to consider the parent for the diff when cherry-picking a merge commit.</param>
/// <param name="options">The options for the merging in the cherry-pick operation.</param>
/// <returns>The <see cref="TransientIndex"/> containing the cherry-pick result tree and any conflicts, or null if the merge stopped early due to conflicts.
/// The index must be disposed by the caller. </returns>
public virtual TransientIndex CherryPickCommitIntoIndex(Commit cherryPickCommit, Commit cherryPickOnto, int mainline, MergeTreeOptions options)
{
Ensure.ArgumentNotNull(cherryPickCommit, "cherryPickCommit");
Ensure.ArgumentNotNull(cherryPickOnto, "cherryPickOnto");
options = options ?? new MergeTreeOptions();
bool earlyStop;
var indexHandle = CherryPickCommit(cherryPickCommit, cherryPickOnto, mainline, options, out earlyStop);
if (earlyStop)
{
if (indexHandle != null)
{
indexHandle.Dispose();
}
return(null);
}
var result = new TransientIndex(indexHandle, repo);
return(result);
}
/// <summary>
/// Perform a three-way merge of two commits, looking up their
/// commit ancestor. The returned index will contain the results
/// of the merge and can be examined for conflicts.
/// </summary>
/// <param name="ours">The first tree</param>
/// <param name="theirs">The second tree</param>
/// <param name="options">The <see cref="MergeTreeOptions"/> controlling the merge</param>
/// <returns>The <see cref="TransientIndex"/> containing the merged trees and any conflicts, or null if the merge stopped early due to conflicts.
/// The index must be disposed by the caller.</returns>
public virtual TransientIndex MergeCommitsIntoIndex(Commit ours, Commit theirs, MergeTreeOptions options)
{
Ensure.ArgumentNotNull(ours, "ours");
Ensure.ArgumentNotNull(theirs, "theirs");
options = options ?? new MergeTreeOptions();
bool earlyStop;
var indexHandle = MergeCommits(ours, theirs, options, out earlyStop);
if (earlyStop)
{
if (indexHandle != null)
{
indexHandle.Dispose();
}
return(null);
}
var result = new TransientIndex(indexHandle, repo);
return(result);
}
/// <summary>
/// Performs a revert of <paramref name="revertCommit"/> onto <paramref name="revertOnto"/> commit.
/// </summary>
/// <param name="revertCommit">The commit to revert.</param>
/// <param name="revertOnto">The commit to revert onto.</param>
/// <param name="mainline">Which commit to consider the parent for the diff when reverting a merge commit.</param>
/// <param name="options">The options for the merging in the revert operation.</param>
/// <returns>A result containing a <see cref="Tree"/> if the revert was successful and a list of <see cref="Conflict"/>s if it is not.</returns>
public virtual MergeTreeResult RevertCommit(Commit revertCommit, Commit revertOnto, int mainline, MergeTreeOptions options)
{
Ensure.ArgumentNotNull(revertCommit, "revertCommit");
Ensure.ArgumentNotNull(revertOnto, "revertOnto");
options = options ?? new MergeTreeOptions();
// We throw away the index after looking at the conflicts, so we'll never need the REUC
// entries to be there
GitMergeFlag mergeFlags = GitMergeFlag.GIT_MERGE_NORMAL | GitMergeFlag.GIT_MERGE_SKIP_REUC;
if (options.FindRenames)
{
mergeFlags |= GitMergeFlag.GIT_MERGE_FIND_RENAMES;
}
if (options.FailOnConflict)
{
mergeFlags |= GitMergeFlag.GIT_MERGE_FAIL_ON_CONFLICT;
}
var opts = new GitMergeOpts
{
Version = 1,
MergeFileFavorFlags = options.MergeFileFavor,
MergeTreeFlags = mergeFlags,
RenameThreshold = (uint)options.RenameThreshold,
TargetLimit = (uint)options.TargetLimit
};
bool earlyStop;
using (var revertOntoHandle = Proxy.git_object_lookup(repo.Handle, revertOnto.Id, GitObjectType.Commit))
using (var revertCommitHandle = Proxy.git_object_lookup(repo.Handle, revertCommit.Id, GitObjectType.Commit))
using (var indexHandle = Proxy.git_revert_commit(repo.Handle, revertCommitHandle, revertOntoHandle, (uint)mainline, opts, out earlyStop))
{
MergeTreeResult revertTreeResult;
// Stopped due to FailOnConflict so there's no index or conflict list
if (earlyStop)
{
return(new MergeTreeResult(new Conflict[] { }));
}
if (Proxy.git_index_has_conflicts(indexHandle))
{
List <Conflict> conflicts = new List <Conflict>();
Conflict conflict;
using (ConflictIteratorHandle iterator = Proxy.git_index_conflict_iterator_new(indexHandle))
{
while ((conflict = Proxy.git_index_conflict_next(iterator)) != null)
{
conflicts.Add(conflict);
}
}
revertTreeResult = new MergeTreeResult(conflicts);
}
else
{
var treeId = Proxy.git_index_write_tree_to(indexHandle, repo.Handle);
revertTreeResult = new MergeTreeResult(this.repo.Lookup <Tree>(treeId));
}
return(revertTreeResult);
}
}