IndexDiff.java

  1. /*
  2.  * Copyright (C) 2007, Dave Watson <dwatson@mimvista.com>
  3.  * Copyright (C) 2007-2008, Robin Rosenberg <robin.rosenberg@dewire.com>
  4.  * Copyright (C) 2010, Jens Baumgart <jens.baumgart@sap.com>
  5.  * Copyright (C) 2013, Robin Stocker <robin@nibor.org>
  6.  * Copyright (C) 2014, Axel Richard <axel.richard@obeo.fr>
  7.  * and other copyright owners as documented in the project's IP log.
  8.  *
  9.  * This program and the accompanying materials are made available
  10.  * under the terms of the Eclipse Distribution License v1.0 which
  11.  * accompanies this distribution, is reproduced below, and is
  12.  * available at http://www.eclipse.org/org/documents/edl-v10.php
  13.  *
  14.  * All rights reserved.
  15.  *
  16.  * Redistribution and use in source and binary forms, with or
  17.  * without modification, are permitted provided that the following
  18.  * conditions are met:
  19.  *
  20.  * - Redistributions of source code must retain the above copyright
  21.  *   notice, this list of conditions and the following disclaimer.
  22.  *
  23.  * - Redistributions in binary form must reproduce the above
  24.  *   copyright notice, this list of conditions and the following
  25.  *   disclaimer in the documentation and/or other materials provided
  26.  *   with the distribution.
  27.  *
  28.  * - Neither the name of the Eclipse Foundation, Inc. nor the
  29.  *   names of its contributors may be used to endorse or promote
  30.  *   products derived from this software without specific prior
  31.  *   written permission.
  32.  *
  33.  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  34.  * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  35.  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  36.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  37.  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  38.  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  39.  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  40.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  41.  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  42.  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  43.  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  44.  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  45.  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  46.  */

  48. package org.eclipse.jgit.lib;

  50. import java.io.File;
  51. import java.io.IOException;
  52. import java.nio.file.DirectoryIteratorException;
  53. import java.nio.file.DirectoryStream;
  54. import java.nio.file.Files;
  55. import java.text.MessageFormat;
  56. import java.util.ArrayList;
  57. import java.util.Collection;
  58. import java.util.Collections;
  59. import java.util.HashMap;
  60. import java.util.HashSet;
  61. import java.util.Map;
  62. import java.util.Set;

  64. import org.eclipse.jgit.dircache.DirCache;
  65. import org.eclipse.jgit.dircache.DirCacheEntry;
  66. import org.eclipse.jgit.dircache.DirCacheIterator;
  67. import org.eclipse.jgit.errors.ConfigInvalidException;
  68. import org.eclipse.jgit.errors.IncorrectObjectTypeException;
  69. import org.eclipse.jgit.errors.MissingObjectException;
  70. import org.eclipse.jgit.errors.StopWalkException;
  71. import org.eclipse.jgit.internal.JGitText;
  72. import org.eclipse.jgit.revwalk.RevWalk;
  73. import org.eclipse.jgit.submodule.SubmoduleWalk;
  74. import org.eclipse.jgit.submodule.SubmoduleWalk.IgnoreSubmoduleMode;
  75. import org.eclipse.jgit.treewalk.AbstractTreeIterator;
  76. import org.eclipse.jgit.treewalk.EmptyTreeIterator;
  77. import org.eclipse.jgit.treewalk.FileTreeIterator;
  78. import org.eclipse.jgit.treewalk.TreeWalk;
  79. import org.eclipse.jgit.treewalk.TreeWalk.OperationType;
  80. import org.eclipse.jgit.treewalk.WorkingTreeIterator;
  81. import org.eclipse.jgit.treewalk.filter.AndTreeFilter;
  82. import org.eclipse.jgit.treewalk.filter.IndexDiffFilter;
  83. import org.eclipse.jgit.treewalk.filter.SkipWorkTreeFilter;
  84. import org.eclipse.jgit.treewalk.filter.TreeFilter;

  86. /**
  87.  * Compares the index, a tree, and the working directory Ignored files are not
  88.  * taken into account. The following information is retrieved:
  89.  * <ul>
  90.  * <li>added files</li>
  91.  * <li>changed files</li>
  92.  * <li>removed files</li>
  93.  * <li>missing files</li>
  94.  * <li>modified files</li>
  95.  * <li>conflicting files</li>
  96.  * <li>untracked files</li>
  97.  * <li>files with assume-unchanged flag</li>
  98.  * </ul>
  99.  */
  100. public class IndexDiff {

  102.     /**
  103.      * Represents the state of the index for a certain path regarding the stages
  104.      * - which stages exist for a path and which not (base, ours, theirs).
  105.      * <p>
  106.      * This is used for figuring out what kind of conflict occurred.
  107.      *
  108.      * @see IndexDiff#getConflictingStageStates()
  109.      * @since 3.0
  110.      */
  111.     public static enum StageState {
  112.         /**
  113.          * Exists in base, but neither in ours nor in theirs.
  114.          */
  115.         BOTH_DELETED(1),

  117.         /**
  118.          * Only exists in ours.
  119.          */
  120.         ADDED_BY_US(2),

  122.         /**
  123.          * Exists in base and ours, but no in theirs.
  124.          */
  125.         DELETED_BY_THEM(3),

  127.         /**
  128.          * Only exists in theirs.
  129.          */
  130.         ADDED_BY_THEM(4),

  132.         /**
  133.          * Exists in base and theirs, but not in ours.
  134.          */
  135.         DELETED_BY_US(5),

  137.         /**
  138.          * Exists in ours and theirs, but not in base.
  139.          */
  140.         BOTH_ADDED(6),

  142.         /**
  143.          * Exists in all stages, content conflict.
  144.          */
  145.         BOTH_MODIFIED(7);

  147.         private final int stageMask;

  149.         private StageState(int stageMask) {
  150.             this.stageMask = stageMask;
  151.         }

  153.         int getStageMask() {
  154.             return stageMask;
  155.         }

  157.         /**
  158.          * @return whether there is a "base" stage entry
  159.          */
  160.         public boolean hasBase() {
  161.             return (stageMask & 1) != 0;
  162.         }

  164.         /**
  165.          * @return whether there is an "ours" stage entry
  166.          */
  167.         public boolean hasOurs() {
  168.             return (stageMask & 2) != 0;
  169.         }

  171.         /**
  172.          * @return whether there is a "theirs" stage entry
  173.          */
  174.         public boolean hasTheirs() {
  175.             return (stageMask & 4) != 0;
  176.         }

  178.         static StageState fromMask(int stageMask) {
  179.             // bits represent: theirs, ours, base
  180.             switch (stageMask) {
  181.             case 1: // 0b001
  182.                 return BOTH_DELETED;
  183.             case 2: // 0b010
  184.                 return ADDED_BY_US;
  185.             case 3: // 0b011
  186.                 return DELETED_BY_THEM;
  187.             case 4: // 0b100
  188.                 return ADDED_BY_THEM;
  189.             case 5: // 0b101
  190.                 return DELETED_BY_US;
  191.             case 6: // 0b110
  192.                 return BOTH_ADDED;
  193.             case 7: // 0b111
  194.                 return BOTH_MODIFIED;
  195.             default:
  196.                 return null;
  197.             }
  198.         }
  199.     }

  201.     private static final class ProgressReportingFilter extends TreeFilter {

  203.         private final ProgressMonitor monitor;

  205.         private int count = 0;

  207.         private int stepSize;

  209.         private final int total;

  211.         private ProgressReportingFilter(ProgressMonitor monitor, int total) {
  212.             this.monitor = monitor;
  213.             this.total = total;
  214.             stepSize = total / 100;
  215.             if (stepSize == 0)
  216.                 stepSize = 1000;
  217.         }

  219.         @Override
  220.         public boolean shouldBeRecursive() {
  221.             return false;
  222.         }

  224.         @Override
  225.         public boolean include(TreeWalk walker)
  226.                 throws MissingObjectException,
  227.                 IncorrectObjectTypeException, IOException {
  228.             count++;
  229.             if (count % stepSize == 0) {
  230.                 if (count <= total)
  231.                     monitor.update(stepSize);
  232.                 if (monitor.isCancelled())
  233.                     throw StopWalkException.INSTANCE;
  234.             }
  235.             return true;
  236.         }

  238.         @Override
  239.         public TreeFilter clone() {
  240.             throw new IllegalStateException(
  241.                     "Do not clone this kind of filter: " //$NON-NLS-1$
  242.                             + getClass().getName());
  243.         }
  244.     }

  246.     private final static int TREE = 0;

  248.     private final static int INDEX = 1;

  250.     private final static int WORKDIR = 2;

  252.     private final Repository repository;

  254.     private final AnyObjectId tree;

  256.     private TreeFilter filter = null;

  258.     private final WorkingTreeIterator initialWorkingTreeIterator;

  260.     private Set<String> added = new HashSet<>();

  262.     private Set<String> changed = new HashSet<>();

  264.     private Set<String> removed = new HashSet<>();

  266.     private Set<String> missing = new HashSet<>();

  268.     private Set<String> missingSubmodules = new HashSet<>();

  270.     private Set<String> modified = new HashSet<>();

  272.     private Set<String> untracked = new HashSet<>();

  274.     private Map<String, StageState> conflicts = new HashMap<>();

  276.     private Set<String> ignored;

  278.     private Set<String> assumeUnchanged;

  280.     private DirCache dirCache;

  282.     private IndexDiffFilter indexDiffFilter;

  284.     private Map<String, IndexDiff> submoduleIndexDiffs = new HashMap<>();

  286.     private IgnoreSubmoduleMode ignoreSubmoduleMode = null;

  288.     private Map<FileMode, Set<String>> fileModes = new HashMap<>();

  290.     /**
  291.      * Construct an IndexDiff
  292.      *
  293.      * @param repository
  294.      *            a {@link org.eclipse.jgit.lib.Repository} object.
  295.      * @param revstr
  296.      *            symbolic name e.g. HEAD An EmptyTreeIterator is used if
  297.      *            <code>revstr</code> cannot be resolved.
  298.      * @param workingTreeIterator
  299.      *            iterator for working directory
  300.      * @throws java.io.IOException
  301.      */
  302.     public IndexDiff(Repository repository, String revstr,
  303.             WorkingTreeIterator workingTreeIterator) throws IOException {
  304.         this(repository, repository.resolve(revstr), workingTreeIterator);
  305.     }

  307.     /**
  308.      * Construct an Indexdiff
  309.      *
  310.      * @param repository
  311.      *            a {@link org.eclipse.jgit.lib.Repository} object.
  312.      * @param objectId
  313.      *            tree id. If null, an EmptyTreeIterator is used.
  314.      * @param workingTreeIterator
  315.      *            iterator for working directory
  316.      * @throws java.io.IOException
  317.      */
  318.     public IndexDiff(Repository repository, ObjectId objectId,
  319.             WorkingTreeIterator workingTreeIterator) throws IOException {
  320.         this.repository = repository;
  321.         if (objectId != null) {
  322.             try (RevWalk rw = new RevWalk(repository)) {
  323.                 tree = rw.parseTree(objectId);
  324.             }
  325.         } else {
  326.             tree = null;
  327.         }
  328.         this.initialWorkingTreeIterator = workingTreeIterator;
  329.     }

  331.     /**
  332.      * Defines how modifications in submodules are treated
  333.      *
  334.      * @param mode
  335.      *            defines how modifications in submodules are treated
  336.      * @since 3.6
  337.      */
  338.     public void setIgnoreSubmoduleMode(IgnoreSubmoduleMode mode) {
  339.         this.ignoreSubmoduleMode = mode;
  340.     }

  342.     /**
  343.      * A factory to producing WorkingTreeIterators
  344.      * @since 3.6
  345.      */
  346.     public interface WorkingTreeIteratorFactory {
  347.         /**
  348.          * @param repo
  349.          *            the repository
  350.          * @return working tree iterator
  351.          */
  352.         public WorkingTreeIterator getWorkingTreeIterator(Repository repo);
  353.     }

  355.     private WorkingTreeIteratorFactory wTreeIt = FileTreeIterator::new;

  357.     /**
  358.      * Allows higher layers to set the factory for WorkingTreeIterators.
  359.      *
  360.      * @param wTreeIt
  361.      * @since 3.6
  362.      */
  363.     public void setWorkingTreeItFactory(WorkingTreeIteratorFactory wTreeIt) {
  364.         this.wTreeIt = wTreeIt;
  365.     }

  367.     /**
  368.      * Sets a filter. Can be used e.g. for restricting the tree walk to a set of
  369.      * files.
  370.      *
  371.      * @param filter
  372.      *            a {@link org.eclipse.jgit.treewalk.filter.TreeFilter} object.
  373.      */
  374.     public void setFilter(TreeFilter filter) {
  375.         this.filter = filter;
  376.     }

  378.     /**
  379.      * Run the diff operation. Until this is called, all lists will be empty.
  380.      * Use {@link #diff(ProgressMonitor, int, int, String)} if a progress
  381.      * monitor is required.
  382.      *
  383.      * @return if anything is different between index, tree, and workdir
  384.      * @throws java.io.IOException
  385.      */
  386.     public boolean diff() throws IOException {
  387.         return diff(null, 0, 0, ""); //$NON-NLS-1$
  388.     }

  390.     /**
  391.      * Run the diff operation. Until this is called, all lists will be empty.
  392.      * <p>
  393.      * The operation may be aborted by the progress monitor. In that event it
  394.      * will report what was found before the cancel operation was detected.
  395.      * Callers should ignore the result if monitor.isCancelled() is true. If a
  396.      * progress monitor is not needed, callers should use {@link #diff()}
  397.      * instead. Progress reporting is crude and approximate and only intended
  398.      * for informing the user.
  399.      *
  400.      * @param monitor
  401.      *            for reporting progress, may be null
  402.      * @param estWorkTreeSize
  403.      *            number or estimated files in the working tree
  404.      * @param estIndexSize
  405.      *            number of estimated entries in the cache
  406.      * @param title a {@link java.lang.String} object.
  407.      * @return if anything is different between index, tree, and workdir
  408.      * @throws java.io.IOException
  409.      */
  410.     public boolean diff(final ProgressMonitor monitor, int estWorkTreeSize,
  411.             int estIndexSize, final String title)
  412.             throws IOException {
  413.         dirCache = repository.readDirCache();

  415.         try (TreeWalk treeWalk = new TreeWalk(repository)) {
  416.             treeWalk.setOperationType(OperationType.CHECKIN_OP);
  417.             treeWalk.setRecursive(true);
  418.             // add the trees (tree, dirchache, workdir)
  419.             if (tree != null)
  420.                 treeWalk.addTree(tree);
  421.             else
  422.                 treeWalk.addTree(new EmptyTreeIterator());
  423.             treeWalk.addTree(new DirCacheIterator(dirCache));
  424.             treeWalk.addTree(initialWorkingTreeIterator);
  425.             initialWorkingTreeIterator.setDirCacheIterator(treeWalk, 1);
  426.             Collection<TreeFilter> filters = new ArrayList<>(4);

  428.             if (monitor != null) {
  429.                 // Get the maximum size of the work tree and index
  430.                 // and add some (quite arbitrary)
  431.                 if (estIndexSize == 0)
  432.                     estIndexSize = dirCache.getEntryCount();
  433.                 int total = Math.max(estIndexSize * 10 / 9,
  434.                         estWorkTreeSize * 10 / 9);
  435.                 monitor.beginTask(title, total);
  436.                 filters.add(new ProgressReportingFilter(monitor, total));
  437.             }

  439.             if (filter != null)
  440.                 filters.add(filter);
  441.             filters.add(new SkipWorkTreeFilter(INDEX));
  442.             indexDiffFilter = new IndexDiffFilter(INDEX, WORKDIR);
  443.             filters.add(indexDiffFilter);
  444.             treeWalk.setFilter(AndTreeFilter.create(filters));
  445.             fileModes.clear();
  446.             while (treeWalk.next()) {
  447.                 AbstractTreeIterator treeIterator = treeWalk.getTree(TREE,
  448.                         AbstractTreeIterator.class);
  449.                 DirCacheIterator dirCacheIterator = treeWalk.getTree(INDEX,
  450.                         DirCacheIterator.class);
  451.                 WorkingTreeIterator workingTreeIterator = treeWalk
  452.                         .getTree(WORKDIR, WorkingTreeIterator.class);

  454.                 if (dirCacheIterator != null) {
  455.                     final DirCacheEntry dirCacheEntry = dirCacheIterator
  456.                             .getDirCacheEntry();
  457.                     if (dirCacheEntry != null) {
  458.                         int stage = dirCacheEntry.getStage();
  459.                         if (stage > 0) {
  460.                             String path = treeWalk.getPathString();
  461.                             addConflict(path, stage);
  462.                             continue;
  463.                         }
  464.                     }
  465.                 }

  467.                 if (treeIterator != null) {
  468.                     if (dirCacheIterator != null) {
  469.                         if (!treeIterator.idEqual(dirCacheIterator)
  470.                                 || treeIterator
  471.                                         .getEntryRawMode() != dirCacheIterator
  472.                                                 .getEntryRawMode()) {
  473.                             // in repo, in index, content diff => changed
  474.                             if (!isEntryGitLink(treeIterator)
  475.                                     || !isEntryGitLink(dirCacheIterator)
  476.                                     || ignoreSubmoduleMode != IgnoreSubmoduleMode.ALL)
  477.                                 changed.add(treeWalk.getPathString());
  478.                         }
  479.                     } else {
  480.                         // in repo, not in index => removed
  481.                         if (!isEntryGitLink(treeIterator)
  482.                                 || ignoreSubmoduleMode != IgnoreSubmoduleMode.ALL)
  483.                             removed.add(treeWalk.getPathString());
  484.                         if (workingTreeIterator != null)
  485.                             untracked.add(treeWalk.getPathString());
  486.                     }
  487.                 } else {
  488.                     if (dirCacheIterator != null) {
  489.                         // not in repo, in index => added
  490.                         if (!isEntryGitLink(dirCacheIterator)
  491.                                 || ignoreSubmoduleMode != IgnoreSubmoduleMode.ALL)
  492.                             added.add(treeWalk.getPathString());
  493.                     } else {
  494.                         // not in repo, not in index => untracked
  495.                         if (workingTreeIterator != null
  496.                                 && !workingTreeIterator.isEntryIgnored()) {
  497.                             untracked.add(treeWalk.getPathString());
  498.                         }
  499.                     }
  500.                 }

  502.                 if (dirCacheIterator != null) {
  503.                     if (workingTreeIterator == null) {
  504.                         // in index, not in workdir => missing
  505.                         boolean isGitLink = isEntryGitLink(dirCacheIterator);
  506.                         if (!isGitLink
  507.                                 || ignoreSubmoduleMode != IgnoreSubmoduleMode.ALL) {
  508.                             String path = treeWalk.getPathString();
  509.                             missing.add(path);
  510.                             if (isGitLink) {
  511.                                 missingSubmodules.add(path);
  512.                             }
  513.                         }
  514.                     } else {
  515.                         if (workingTreeIterator.isModified(
  516.                                 dirCacheIterator.getDirCacheEntry(), true,
  517.                                 treeWalk.getObjectReader())) {
  518.                             // in index, in workdir, content differs => modified
  519.                             if (!isEntryGitLink(dirCacheIterator)
  520.                                     || !isEntryGitLink(workingTreeIterator)
  521.                                     || (ignoreSubmoduleMode != IgnoreSubmoduleMode.ALL
  522.                                             && ignoreSubmoduleMode != IgnoreSubmoduleMode.DIRTY))
  523.                                 modified.add(treeWalk.getPathString());
  524.                         }
  525.                     }
  526.                 }

  528.                 String path = treeWalk.getPathString();
  529.                 if (path != null) {
  530.                     for (int i = 0; i < treeWalk.getTreeCount(); i++) {
  531.                         recordFileMode(path, treeWalk.getFileMode(i));
  532.                     }
  533.                 }
  534.             }
  535.         }

  537.         if (ignoreSubmoduleMode != IgnoreSubmoduleMode.ALL) {
  538.             IgnoreSubmoduleMode localIgnoreSubmoduleMode = ignoreSubmoduleMode;
  539.             SubmoduleWalk smw = SubmoduleWalk.forIndex(repository);
  540.             while (smw.next()) {
  541.                 try {
  542.                     if (localIgnoreSubmoduleMode == null)
  543.                         localIgnoreSubmoduleMode = smw.getModulesIgnore();
  544.                     if (IgnoreSubmoduleMode.ALL
  545.                             .equals(localIgnoreSubmoduleMode))
  546.                         continue;
  547.                 } catch (ConfigInvalidException e) {
  548.                     throw new IOException(MessageFormat.format(
  549.                             JGitText.get().invalidIgnoreParamSubmodule,
  550.                             smw.getPath()), e);
  551.                 }
  552.                 try (Repository subRepo = smw.getRepository()) {
  553.                     String subRepoPath = smw.getPath();
  554.                     if (subRepo != null) {
  555.                         ObjectId subHead = subRepo.resolve("HEAD"); //$NON-NLS-1$
  556.                         if (subHead != null
  557.                                 && !subHead.equals(smw.getObjectId())) {
  558.                             modified.add(subRepoPath);
  559.                             recordFileMode(subRepoPath, FileMode.GITLINK);
  560.                         } else if (ignoreSubmoduleMode != IgnoreSubmoduleMode.DIRTY) {
  561.                             IndexDiff smid = submoduleIndexDiffs.get(smw
  562.                                     .getPath());
  563.                             if (smid == null) {
  564.                                 smid = new IndexDiff(subRepo,
  565.                                         smw.getObjectId(),
  566.                                         wTreeIt.getWorkingTreeIterator(subRepo));
  567.                                 submoduleIndexDiffs.put(subRepoPath, smid);
  568.                             }
  569.                             if (smid.diff()) {
  570.                                 if (ignoreSubmoduleMode == IgnoreSubmoduleMode.UNTRACKED
  571.                                         && smid.getAdded().isEmpty()
  572.                                         && smid.getChanged().isEmpty()
  573.                                         && smid.getConflicting().isEmpty()
  574.                                         && smid.getMissing().isEmpty()
  575.                                         && smid.getModified().isEmpty()
  576.                                         && smid.getRemoved().isEmpty()) {
  577.                                     continue;
  578.                                 }
  579.                                 modified.add(subRepoPath);
  580.                                 recordFileMode(subRepoPath, FileMode.GITLINK);
  581.                             }
  582.                         }
  583.                     } else if (missingSubmodules.remove(subRepoPath)) {
  584.                         // If the directory is there and empty but the submodule
  585.                         // repository in .git/modules doesn't exist yet it isn't
  586.                         // "missing".
  587.                         File gitDir = new File(
  588.                                 new File(repository.getDirectory(),
  589.                                         Constants.MODULES),
  590.                                 subRepoPath);
  591.                         if (!gitDir.isDirectory()) {
  592.                             File dir = SubmoduleWalk.getSubmoduleDirectory(
  593.                                     repository, subRepoPath);
  594.                             if (dir.isDirectory() && !hasFiles(dir)) {
  595.                                 missing.remove(subRepoPath);
  596.                             }
  597.                         }
  598.                     }
  599.                 }
  600.             }

  602.         }

  604.         // consume the remaining work
  605.         if (monitor != null)
  606.             monitor.endTask();

  608.         ignored = indexDiffFilter.getIgnoredPaths();
  609.         if (added.isEmpty() && changed.isEmpty() && removed.isEmpty()
  610.                 && missing.isEmpty() && modified.isEmpty()
  611.                 && untracked.isEmpty())
  612.             return false;
  613.         else
  614.             return true;
  615.     }

  617.     private boolean hasFiles(File directory) {
  618.         try (DirectoryStream<java.nio.file.Path> dir = Files
  619.                 .newDirectoryStream(directory.toPath())) {
  620.             return dir.iterator().hasNext();
  621.         } catch (DirectoryIteratorException | IOException e) {
  622.             return false;
  623.         }
  624.     }

  626.     private void recordFileMode(String path, FileMode mode) {
  627.         Set<String> values = fileModes.get(mode);
  628.         if (path != null) {
  629.             if (values == null) {
  630.                 values = new HashSet<>();
  631.                 fileModes.put(mode, values);
  632.             }
  633.             values.add(path);
  634.         }
  635.     }

  637.     private boolean isEntryGitLink(AbstractTreeIterator ti) {
  638.         return ((ti != null) && (ti.getEntryRawMode() == FileMode.GITLINK
  639.                 .getBits()));
  640.     }

  642.     private void addConflict(String path, int stage) {
  643.         StageState existingStageStates = conflicts.get(path);
  644.         byte stageMask = 0;
  645.         if (existingStageStates != null)
  646.             stageMask |= existingStageStates.getStageMask();
  647.         // stage 1 (base) should be shifted 0 times
  648.         int shifts = stage - 1;
  649.         stageMask |= (1 << shifts);
  650.         StageState stageState = StageState.fromMask(stageMask);
  651.         conflicts.put(path, stageState);
  652.     }

  654.     /**
  655.      * Get list of files added to the index, not in the tree
  656.      *
  657.      * @return list of files added to the index, not in the tree
  658.      */
  659.     public Set<String> getAdded() {
  660.         return added;
  661.     }

  663.     /**
  664.      * Get list of files changed from tree to index
  665.      *
  666.      * @return list of files changed from tree to index
  667.      */
  668.     public Set<String> getChanged() {
  669.         return changed;
  670.     }

  672.     /**
  673.      * Get list of files removed from index, but in tree
  674.      *
  675.      * @return list of files removed from index, but in tree
  676.      */
  677.     public Set<String> getRemoved() {
  678.         return removed;
  679.     }

  681.     /**
  682.      * Get list of files in index, but not filesystem
  683.      *
  684.      * @return list of files in index, but not filesystem
  685.      */
  686.     public Set<String> getMissing() {
  687.         return missing;
  688.     }

  690.     /**
  691.      * Get list of files modified on disk relative to the index
  692.      *
  693.      * @return list of files modified on disk relative to the index
  694.      */
  695.     public Set<String> getModified() {
  696.         return modified;
  697.     }

  699.     /**
  700.      * Get list of files that are not ignored, and not in the index.
  701.      *
  702.      * @return list of files that are not ignored, and not in the index.
  703.      */
  704.     public Set<String> getUntracked() {
  705.         return untracked;
  706.     }

  708.     /**
  709.      * Get list of files that are in conflict, corresponds to the keys of
  710.      * {@link #getConflictingStageStates()}
  711.      *
  712.      * @return list of files that are in conflict, corresponds to the keys of
  713.      *         {@link #getConflictingStageStates()}
  714.      */
  715.     public Set<String> getConflicting() {
  716.         return conflicts.keySet();
  717.     }

  719.     /**
  720.      * Get the map from each path of {@link #getConflicting()} to its
  721.      * corresponding {@link org.eclipse.jgit.lib.IndexDiff.StageState}
  722.      *
  723.      * @return the map from each path of {@link #getConflicting()} to its
  724.      *         corresponding {@link org.eclipse.jgit.lib.IndexDiff.StageState}
  725.      * @since 3.0
  726.      */
  727.     public Map<String, StageState> getConflictingStageStates() {
  728.         return conflicts;
  729.     }

  731.     /**
  732.      * The method returns the list of ignored files and folders. Only the root
  733.      * folder of an ignored folder hierarchy is reported. If a/b/c is listed in
  734.      * the .gitignore then you should not expect a/b/c/d/e/f to be reported
  735.      * here. Only a/b/c will be reported. Furthermore only ignored files /
  736.      * folders are returned that are NOT in the index.
  737.      *
  738.      * @return list of files / folders that are ignored
  739.      */
  740.     public Set<String> getIgnoredNotInIndex() {
  741.         return ignored;
  742.     }

  744.     /**
  745.      * Get list of files with the flag assume-unchanged
  746.      *
  747.      * @return list of files with the flag assume-unchanged
  748.      */
  749.     public Set<String> getAssumeUnchanged() {
  750.         if (assumeUnchanged == null) {
  751.             HashSet<String> unchanged = new HashSet<>();
  752.             for (int i = 0; i < dirCache.getEntryCount(); i++)
  753.                 if (dirCache.getEntry(i).isAssumeValid())
  754.                     unchanged.add(dirCache.getEntry(i).getPathString());
  755.             assumeUnchanged = unchanged;
  756.         }
  757.         return assumeUnchanged;
  758.     }

  760.     /**
  761.      * Get list of folders containing only untracked files/folders
  762.      *
  763.      * @return list of folders containing only untracked files/folders
  764.      */
  765.     public Set<String> getUntrackedFolders() {
  766.         return ((indexDiffFilter == null) ? Collections.<String> emptySet()
  767.                 : new HashSet<>(indexDiffFilter.getUntrackedFolders()));
  768.     }

  770.     /**
  771.      * Get the file mode of the given path in the index
  772.      *
  773.      * @param path a {@link java.lang.String} object.
  774.      * @return file mode
  775.      */
  776.     public FileMode getIndexMode(String path) {
  777.         final DirCacheEntry entry = dirCache.getEntry(path);
  778.         return entry != null ? entry.getFileMode() : FileMode.MISSING;
  779.     }

  781.     /**
  782.      * Get the list of paths that IndexDiff has detected to differ and have the
  783.      * given file mode
  784.      *
  785.      * @param mode a {@link org.eclipse.jgit.lib.FileMode} object.
  786.      * @return the list of paths that IndexDiff has detected to differ and have
  787.      *         the given file mode
  788.      * @since 3.6
  789.      */
  790.     public Set<String> getPathsWithIndexMode(FileMode mode) {
  791.         Set<String> paths = fileModes.get(mode);
  792.         if (paths == null)
  793.             paths = new HashSet<>();
  794.         return paths;
  795.     }
  796. }
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