/// <summary>Enable or disable rename detection.</summary>
/// <remarks>
/// Enable or disable rename detection.
/// Before enabling rename detection the repository must be set with
/// <see cref="SetRepository(NGit.Repository)">SetRepository(NGit.Repository)</see>
/// . Once enabled the detector can be
/// configured away from its defaults by obtaining the instance directly from
/// <see cref="GetRenameDetector()">GetRenameDetector()</see>
/// and invoking configuration.
/// </remarks>
/// <param name="on">if rename detection should be enabled.</param>
public virtual void SetDetectRenames(bool on)
{
if (on && renameDetector == null)
{
AssertHaveRepository();
renameDetector = new RenameDetector(db);
}
else
{
if (!on)
{
renameDetector = null;
}
}
}
// reduce the visibility of the default constructor
/// <summary>Convert the TreeWalk into DiffEntry headers.</summary>
/// <remarks>Convert the TreeWalk into DiffEntry headers.</remarks>
/// <param name="walk">the TreeWalk to walk through. Must have exactly two trees.</param>
/// <returns>headers describing the changed files.</returns>
/// <exception cref="System.IO.IOException">the repository cannot be accessed.</exception>
public static IList <NGit.Diff.DiffEntry> Scan(TreeWalk walk)
{
IList <NGit.Diff.DiffEntry> r = new AList <NGit.Diff.DiffEntry>();
MutableObjectId idBuf = new MutableObjectId();
while (walk.Next())
{
NGit.Diff.DiffEntry entry = new NGit.Diff.DiffEntry();
walk.GetObjectId(idBuf, 0);
entry.oldId = AbbreviatedObjectId.FromObjectId(idBuf);
walk.GetObjectId(idBuf, 1);
entry.newId = AbbreviatedObjectId.FromObjectId(idBuf);
entry.oldMode = walk.GetFileMode(0);
entry.newMode = walk.GetFileMode(1);
entry.newPath = entry.oldPath = walk.PathString;
if (entry.oldMode == FileMode.MISSING)
{
entry.oldPath = NGit.Diff.DiffEntry.DEV_NULL;
entry.changeType = DiffEntry.ChangeType.ADD;
r.AddItem(entry);
}
else
{
if (entry.newMode == FileMode.MISSING)
{
entry.newPath = NGit.Diff.DiffEntry.DEV_NULL;
entry.changeType = DiffEntry.ChangeType.DELETE;
r.AddItem(entry);
}
else
{
entry.changeType = DiffEntry.ChangeType.MODIFY;
if (RenameDetector.SameType(entry.oldMode, entry.newMode))
{
r.AddItem(entry);
}
else
{
Sharpen.Collections.AddAll(r, BreakModify(entry));
}
}
}
}
return(r);
}
/// <summary>
/// Convert the TreeWalk into DiffEntry headers, depending on
/// <code>includeTrees</code>
/// it will add tree objects into result or not.
/// </summary>
/// <param name="walk">
/// the TreeWalk to walk through. Must have exactly two trees and
/// when
/// <code>includeTrees</code>
/// parameter is
/// <code>true</code>
/// it can't
/// be recursive.
/// </param>
/// <param name="includeTrees">include tree object's.</param>
/// <returns>headers describing the changed files.</returns>
/// <exception cref="System.IO.IOException">the repository cannot be accessed.</exception>
/// <exception cref="System.ArgumentException">
/// when
/// <code>includeTrees</code>
/// is true and given TreeWalk is
/// recursive. Or when given TreeWalk doesn't have exactly two
/// trees
/// </exception>
public static IList <NGit.Diff.DiffEntry> Scan(TreeWalk walk, bool includeTrees)
{
if (walk.TreeCount != 2)
{
throw new ArgumentException(JGitText.Get().treeWalkMustHaveExactlyTwoTrees);
}
if (includeTrees && walk.Recursive)
{
throw new ArgumentException(JGitText.Get().cannotBeRecursiveWhenTreesAreIncluded);
}
IList <NGit.Diff.DiffEntry> r = new AList <NGit.Diff.DiffEntry>();
MutableObjectId idBuf = new MutableObjectId();
while (walk.Next())
{
NGit.Diff.DiffEntry entry = new NGit.Diff.DiffEntry();
walk.GetObjectId(idBuf, 0);
entry.oldId = AbbreviatedObjectId.FromObjectId(idBuf);
walk.GetObjectId(idBuf, 1);
entry.newId = AbbreviatedObjectId.FromObjectId(idBuf);
entry.oldMode = walk.GetFileMode(0);
entry.newMode = walk.GetFileMode(1);
entry.newPath = entry.oldPath = walk.PathString;
if (entry.oldMode == FileMode.MISSING)
{
entry.oldPath = NGit.Diff.DiffEntry.DEV_NULL;
entry.changeType = DiffEntry.ChangeType.ADD;
r.AddItem(entry);
}
else
{
if (entry.newMode == FileMode.MISSING)
{
entry.newPath = NGit.Diff.DiffEntry.DEV_NULL;
entry.changeType = DiffEntry.ChangeType.DELETE;
r.AddItem(entry);
}
else
{
if (!entry.oldId.Equals(entry.newId))
{
entry.changeType = DiffEntry.ChangeType.MODIFY;
if (RenameDetector.SameType(entry.oldMode, entry.newMode))
{
r.AddItem(entry);
}
else
{
Sharpen.Collections.AddAll(r, BreakModify(entry));
}
}
else
{
if (entry.oldMode != entry.newMode)
{
entry.changeType = DiffEntry.ChangeType.MODIFY;
r.AddItem(entry);
}
}
}
}
if (includeTrees && walk.IsSubtree)
{
walk.EnterSubtree();
}
}
return(r);
}
/// <exception cref="System.IO.IOException"></exception>
private int BuildMatrix(ProgressMonitor pm)
{
// Allocate for the worst-case scenario where every pair has a
// score that we need to consider. We might not need that many.
//
matrix = new long[srcs.Count * dsts.Count];
long[] srcSizes = new long[srcs.Count];
long[] dstSizes = new long[dsts.Count];
BitSet dstTooLarge = null;
// Consider each pair of files, if the score is above the minimum
// threshold we need record that scoring in the matrix so we can
// later find the best matches.
//
int mNext = 0;
for (int srcIdx = 0; srcIdx < srcs.Count; srcIdx++)
{
DiffEntry srcEnt = srcs[srcIdx];
if (!IsFile(srcEnt.oldMode))
{
pm.Update(dsts.Count);
continue;
}
SimilarityIndex s = null;
for (int dstIdx = 0; dstIdx < dsts.Count; dstIdx++)
{
DiffEntry dstEnt = dsts[dstIdx];
if (!IsFile(dstEnt.newMode))
{
pm.Update(1);
continue;
}
if (!RenameDetector.SameType(srcEnt.oldMode, dstEnt.newMode))
{
pm.Update(1);
continue;
}
if (dstTooLarge != null && dstTooLarge.Get(dstIdx))
{
pm.Update(1);
continue;
}
long srcSize = srcSizes[srcIdx];
if (srcSize == 0)
{
srcSize = Size(DiffEntry.Side.OLD, srcEnt) + 1;
srcSizes[srcIdx] = srcSize;
}
long dstSize = dstSizes[dstIdx];
if (dstSize == 0)
{
dstSize = Size(DiffEntry.Side.NEW, dstEnt) + 1;
dstSizes[dstIdx] = dstSize;
}
long max = Math.Max(srcSize, dstSize);
long min = Math.Min(srcSize, dstSize);
if (min * 100 / max < renameScore)
{
// Cannot possibly match, as the file sizes are so different
pm.Update(1);
continue;
}
if (s == null)
{
try
{
s = Hash(DiffEntry.Side.OLD, srcEnt);
}
catch (SimilarityIndex.TableFullException)
{
tableOverflow = true;
goto SRC_continue;
}
}
SimilarityIndex d;
try
{
d = Hash(DiffEntry.Side.NEW, dstEnt);
}
catch (SimilarityIndex.TableFullException)
{
if (dstTooLarge == null)
{
dstTooLarge = new BitSet(dsts.Count);
}
dstTooLarge.Set(dstIdx);
tableOverflow = true;
pm.Update(1);
continue;
}
int contentScore = s.Score(d, 10000);
// nameScore returns a value between 0 and 100, but we want it
// to be in the same range as the content score. This allows it
// to be dropped into the pretty formula for the final score.
int nameScore = NameScore(srcEnt.oldPath, dstEnt.newPath) * 100;
int score = (contentScore * 99 + nameScore * 1) / 10000;
if (score < renameScore)
{
pm.Update(1);
continue;
}
matrix[mNext++] = Encode(score, srcIdx, dstIdx);
pm.Update(1);
}
SRC_continue :;
}
SRC_break :;
// Sort everything in the range we populated, which might be the
// entire matrix, or just a smaller slice if we had some bad low
// scoring pairs.
//
Arrays.Sort(matrix, 0, mNext);
return(mNext);
}
public override void SetUp()
{
base.SetUp();
testDb = new TestRepository <FileRepository>(db);
rd = new RenameDetector(db);
}
