/// <summary>
/// Create a new iterator for an already loaded <see cref="DirCache"/> instance.
/// <para/>
/// The iterator implementation may copy part of the cache's data during
/// construction, so the cache must be Read in prior to creating the
/// iterator.
/// </summary>
/// <param name="parentIterator">The parent iterator</param>
/// <param name="cacheTree">The cache tree</param>
DirCacheBuildIterator(DirCacheBuildIterator parentIterator, DirCacheTree cacheTree)
: base(parentIterator, cacheTree)
{
_builder = parentIterator._builder;
}
/// <summary>
/// Create a new iterator for an already loaded <see cref="DirCache"/> instance.
/// <para/>
/// The iterator implementation may copy part of the cache's data during
/// construction, so the cache must be Read in prior to creating the
/// iterator.
/// </summary>
/// <param name="builder">
/// The cache builder for the cache to walk. The cache must be
/// already loaded into memory.
/// </param>
public DirCacheBuildIterator(DirCacheBuilder builder)
: base(builder.getDirCache())
{
_builder = builder;
}
protected override bool MergeImpl()
{
_tw.reset();
_tw.addTree(MergeBase());
_tw.addTree(SourceTrees[0]);
_tw.addTree(SourceTrees[1]);
bool hasConflict = false;
_builder = _cache.builder();
while (_tw.next())
{
int modeO = _tw.getRawMode(Ours);
int modeT = _tw.getRawMode(Theirs);
if (modeO == modeT && _tw.idEqual(Ours, Theirs))
{
Add(Ours, DirCacheEntry.STAGE_0);
continue;
}
int modeB = _tw.getRawMode(Base);
if (modeB == modeO && _tw.idEqual(Base, Ours))
Add(Theirs, DirCacheEntry.STAGE_0);
else if (modeB == modeT && _tw.idEqual(Base, Theirs))
Add(Ours, DirCacheEntry.STAGE_0);
else if (_tw.isSubtree())
{
if (NonTree(modeB))
{
Add(Base, DirCacheEntry.STAGE_1);
hasConflict = true;
}
if (NonTree(modeO))
{
Add(Ours, DirCacheEntry.STAGE_2);
hasConflict = true;
}
if (NonTree(modeT))
{
Add(Theirs, DirCacheEntry.STAGE_3);
hasConflict = true;
}
_tw.enterSubtree();
}
else
{
Add(Base, DirCacheEntry.STAGE_1);
Add(Ours, DirCacheEntry.STAGE_2);
Add(Theirs, DirCacheEntry.STAGE_3);
hasConflict = true;
}
}
_builder.finish();
_builder = null;
if (hasConflict)
return false;
try {
_resultTree = _cache.writeTree(GetObjectWriter());
return true;
} catch (UnmergedPathException)
{
_resultTree = null;
return false;
}
}