diff --git a/org.eclipse.jgit.junit/src/org/eclipse/jgit/junit/RepositoryTestCase.java b/org.eclipse.jgit.junit/src/org/eclipse/jgit/junit/RepositoryTestCase.java
index de11e2c00..cc84f197a 100644
--- a/org.eclipse.jgit.junit/src/org/eclipse/jgit/junit/RepositoryTestCase.java
+++ b/org.eclipse.jgit.junit/src/org/eclipse/jgit/junit/RepositoryTestCase.java
@@ -34,6 +34,7 @@
import org.eclipse.jgit.dircache.DirCacheCheckout;
import org.eclipse.jgit.dircache.DirCacheEntry;
import org.eclipse.jgit.internal.storage.file.FileRepository;
+import org.eclipse.jgit.lib.AnyObjectId;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.FileMode;
import org.eclipse.jgit.lib.ObjectId;
@@ -512,6 +513,21 @@ protected DirCacheEntry createEntry(final String path, final FileMode mode,
return entry;
}
+ /**
+ * Create DirCacheEntry
+ *
+ * @param path
+ * @param objectId
+ * @return the DirCacheEntry
+ */
+ protected DirCacheEntry createGitLink(String path, AnyObjectId objectId) {
+ final DirCacheEntry entry = new DirCacheEntry(path,
+ DirCacheEntry.STAGE_0);
+ entry.setFileMode(FileMode.GITLINK);
+ entry.setObjectId(objectId);
+ return entry;
+ }
+
/**
* Assert files are equal
*
diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/GitlinkMergeTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/GitlinkMergeTest.java
new file mode 100644
index 000000000..c850b4d74
--- /dev/null
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/merge/GitlinkMergeTest.java
@@ -0,0 +1,368 @@
+/*
+ * Copyright (c) 2020, Google LLC and others
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Distribution License v. 1.0 which is available at
+ * http://www.eclipse.org/org/documents/edl-v10.php.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+package org.eclipse.jgit.merge;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+
+import org.eclipse.jgit.annotations.Nullable;
+import org.eclipse.jgit.dircache.DirCache;
+import org.eclipse.jgit.dircache.DirCacheBuilder;
+import org.eclipse.jgit.dircache.DirCacheEntry;
+import org.eclipse.jgit.lib.CommitBuilder;
+import org.eclipse.jgit.lib.FileMode;
+import org.eclipse.jgit.lib.ObjectId;
+import org.eclipse.jgit.lib.ObjectInserter;
+import org.eclipse.jgit.lib.PersonIdent;
+import org.eclipse.jgit.test.resources.SampleDataRepositoryTestCase;
+import org.eclipse.jgit.treewalk.TreeWalk;
+import org.junit.Test;
+
+public class GitlinkMergeTest extends SampleDataRepositoryTestCase {
+ private static final String LINK_ID1 = "DEADBEEFDEADBEEFBABEDEADBEEFDEADBEEFBABE";
+ private static final String LINK_ID2 = "DEADDEADDEADDEADDEADDEADDEADDEADDEADDEAD";
+ private static final String LINK_ID3 = "BEEFBEEFBEEFBEEFBEEFBEEFBEEFBEEFBEEFBEEF";
+
+ private static final String SUBMODULE_PATH = "submodule.link";
+
+ @Test
+ public void testGitLinkMerging_AddNew() throws Exception {
+ assertGitLinkValue(
+ testGitLink(null, null, LINK_ID3, newResolveMerger(), true),
+ LINK_ID3);
+ }
+
+ @Test
+ public void testGitLinkMerging_Delete() throws Exception {
+ assertGitLinkDoesntExist(testGitLink(LINK_ID1, LINK_ID1, null,
+ newResolveMerger(), true));
+ }
+
+ @Test
+ public void testGitLinkMerging_UpdateDelete() throws Exception {
+ testGitLink(LINK_ID1, LINK_ID2, null, newResolveMerger(), false);
+ }
+
+ @Test
+ public void testGitLinkMerging_DeleteUpdate() throws Exception {
+ testGitLink(LINK_ID1, null, LINK_ID3, newResolveMerger(), false);
+ }
+
+ @Test
+ public void testGitLinkMerging_UpdateUpdate() throws Exception {
+ testGitLink(LINK_ID1, LINK_ID2, LINK_ID3, newResolveMerger(), false);
+ }
+
+ @Test
+ public void testGitLinkMerging_bothAddedSameLink() throws Exception {
+ assertGitLinkValue(
+ testGitLink(null, LINK_ID2, LINK_ID2, newResolveMerger(), true),
+ LINK_ID2);
+ }
+
+ @Test
+ public void testGitLinkMerging_bothAddedDifferentLink() throws Exception {
+ testGitLink(null, LINK_ID2, LINK_ID3, newResolveMerger(), false);
+ }
+
+ @Test
+ public void testGitLinkMerging_AddNew_ignoreConflicts() throws Exception {
+ assertGitLinkValue(
+ testGitLink(null, null, LINK_ID3, newIgnoreConflictMerger(),
+ true),
+ LINK_ID3);
+ }
+
+ @Test
+ public void testGitLinkMerging_Delete_ignoreConflicts() throws Exception {
+ assertGitLinkDoesntExist(testGitLink(LINK_ID1, LINK_ID1, null,
+ newIgnoreConflictMerger(), true));
+ }
+
+ @Test
+ public void testGitLinkMerging_UpdateDelete_ignoreConflicts()
+ throws Exception {
+ assertGitLinkValue(testGitLink(LINK_ID1, LINK_ID2, null,
+ newIgnoreConflictMerger(), true), LINK_ID2);
+ }
+
+ @Test
+ public void testGitLinkMerging_DeleteUpdate_ignoreConflicts()
+ throws Exception {
+ assertGitLinkDoesntExist(testGitLink(LINK_ID1, null, LINK_ID3,
+ newIgnoreConflictMerger(), true));
+ }
+
+ @Test
+ public void testGitLinkMerging_UpdateUpdate_ignoreConflicts()
+ throws Exception {
+ assertGitLinkValue(testGitLink(LINK_ID1, LINK_ID2, LINK_ID3,
+ newIgnoreConflictMerger(), true), LINK_ID2);
+ }
+
+ @Test
+ public void testGitLinkMerging_bothAddedSameLink_ignoreConflicts()
+ throws Exception {
+ assertGitLinkValue(testGitLink(null, LINK_ID2, LINK_ID2,
+ newIgnoreConflictMerger(), true), LINK_ID2);
+ }
+
+ @Test
+ public void testGitLinkMerging_bothAddedDifferentLink_ignoreConflicts()
+ throws Exception {
+ assertGitLinkValue(testGitLink(null, LINK_ID2, LINK_ID3,
+ newIgnoreConflictMerger(), true), LINK_ID2);
+ }
+
+ protected Merger testGitLink(@Nullable String baseLink,
+ @Nullable String oursLink, @Nullable String theirsLink,
+ Merger merger, boolean shouldMerge)
+ throws Exception {
+ DirCache treeB = db.readDirCache();
+ DirCache treeO = db.readDirCache();
+ DirCache treeT = db.readDirCache();
+
+ DirCacheBuilder bTreeBuilder = treeB.builder();
+ DirCacheBuilder oTreeBuilder = treeO.builder();
+ DirCacheBuilder tTreeBuilder = treeT.builder();
+
+ maybeAddLink(bTreeBuilder, baseLink);
+ maybeAddLink(oTreeBuilder, oursLink);
+ maybeAddLink(tTreeBuilder, theirsLink);
+
+ bTreeBuilder.finish();
+ oTreeBuilder.finish();
+ tTreeBuilder.finish();
+
+ ObjectInserter ow = db.newObjectInserter();
+ ObjectId b = commit(ow, treeB, new ObjectId[] {});
+ ObjectId o = commit(ow, treeO, new ObjectId[] { b });
+ ObjectId t = commit(ow, treeT, new ObjectId[] { b });
+
+ boolean merge = merger.merge(new ObjectId[] { o, t });
+ assertEquals(shouldMerge, merge);
+
+ return merger;
+ }
+
+ private Merger newResolveMerger() {
+ return MergeStrategy.RESOLVE.newMerger(db, true);
+ }
+
+ private Merger newIgnoreConflictMerger() {
+ return new ResolveMerger(db, true) {
+ @Override
+ protected boolean mergeImpl() throws IOException {
+ // emulate call with ignore conflicts.
+ return mergeTrees(mergeBase(), sourceTrees[0], sourceTrees[1],
+ true);
+ }
+ };
+ }
+
+ @Test
+ public void testGitLinkMerging_blobWithLink() throws Exception {
+ DirCache treeB = db.readDirCache();
+ DirCache treeO = db.readDirCache();
+ DirCache treeT = db.readDirCache();
+
+ DirCacheBuilder bTreeBuilder = treeB.builder();
+ DirCacheBuilder oTreeBuilder = treeO.builder();
+ DirCacheBuilder tTreeBuilder = treeT.builder();
+
+ bTreeBuilder.add(
+ createEntry(SUBMODULE_PATH, FileMode.REGULAR_FILE, "blob"));
+ oTreeBuilder.add(
+ createEntry(SUBMODULE_PATH, FileMode.REGULAR_FILE, "blob 2"));
+
+ maybeAddLink(tTreeBuilder, LINK_ID3);
+
+ bTreeBuilder.finish();
+ oTreeBuilder.finish();
+ tTreeBuilder.finish();
+
+ ObjectInserter ow = db.newObjectInserter();
+ ObjectId b = commit(ow, treeB, new ObjectId[] {});
+ ObjectId o = commit(ow, treeO, new ObjectId[] { b });
+ ObjectId t = commit(ow, treeT, new ObjectId[] { b });
+
+ Merger resolveMerger = MergeStrategy.RESOLVE.newMerger(db);
+ boolean merge = resolveMerger.merge(new ObjectId[] { o, t });
+ assertFalse(merge);
+ }
+
+ @Test
+ public void testGitLinkMerging_linkWithBlob() throws Exception {
+ DirCache treeB = db.readDirCache();
+ DirCache treeO = db.readDirCache();
+ DirCache treeT = db.readDirCache();
+
+ DirCacheBuilder bTreeBuilder = treeB.builder();
+ DirCacheBuilder oTreeBuilder = treeO.builder();
+ DirCacheBuilder tTreeBuilder = treeT.builder();
+
+ maybeAddLink(bTreeBuilder, LINK_ID1);
+ maybeAddLink(oTreeBuilder, LINK_ID2);
+ tTreeBuilder.add(
+ createEntry(SUBMODULE_PATH, FileMode.REGULAR_FILE, "blob 3"));
+
+ bTreeBuilder.finish();
+ oTreeBuilder.finish();
+ tTreeBuilder.finish();
+
+ ObjectInserter ow = db.newObjectInserter();
+ ObjectId b = commit(ow, treeB, new ObjectId[] {});
+ ObjectId o = commit(ow, treeO, new ObjectId[] { b });
+ ObjectId t = commit(ow, treeT, new ObjectId[] { b });
+
+ Merger resolveMerger = MergeStrategy.RESOLVE.newMerger(db);
+ boolean merge = resolveMerger.merge(new ObjectId[] { o, t });
+ assertFalse(merge);
+ }
+
+ @Test
+ public void testGitLinkMerging_linkWithLink() throws Exception {
+ DirCache treeB = db.readDirCache();
+ DirCache treeO = db.readDirCache();
+ DirCache treeT = db.readDirCache();
+
+ DirCacheBuilder bTreeBuilder = treeB.builder();
+ DirCacheBuilder oTreeBuilder = treeO.builder();
+ DirCacheBuilder tTreeBuilder = treeT.builder();
+
+ bTreeBuilder.add(
+ createEntry(SUBMODULE_PATH, FileMode.REGULAR_FILE, "blob"));
+ maybeAddLink(oTreeBuilder, LINK_ID2);
+ maybeAddLink(tTreeBuilder, LINK_ID3);
+
+ bTreeBuilder.finish();
+ oTreeBuilder.finish();
+ tTreeBuilder.finish();
+
+ ObjectInserter ow = db.newObjectInserter();
+ ObjectId b = commit(ow, treeB, new ObjectId[] {});
+ ObjectId o = commit(ow, treeO, new ObjectId[] { b });
+ ObjectId t = commit(ow, treeT, new ObjectId[] { b });
+
+ Merger resolveMerger = MergeStrategy.RESOLVE.newMerger(db);
+ boolean merge = resolveMerger.merge(new ObjectId[] { o, t });
+ assertFalse(merge);
+ }
+
+ @Test
+ public void testGitLinkMerging_blobWithBlobFromLink() throws Exception {
+ DirCache treeB = db.readDirCache();
+ DirCache treeO = db.readDirCache();
+ DirCache treeT = db.readDirCache();
+
+ DirCacheBuilder bTreeBuilder = treeB.builder();
+ DirCacheBuilder oTreeBuilder = treeO.builder();
+ DirCacheBuilder tTreeBuilder = treeT.builder();
+
+ maybeAddLink(bTreeBuilder, LINK_ID1);
+ oTreeBuilder.add(
+ createEntry(SUBMODULE_PATH, FileMode.REGULAR_FILE, "blob 2"));
+ tTreeBuilder.add(
+ createEntry(SUBMODULE_PATH, FileMode.REGULAR_FILE, "blob 3"));
+
+ bTreeBuilder.finish();
+ oTreeBuilder.finish();
+ tTreeBuilder.finish();
+
+ ObjectInserter ow = db.newObjectInserter();
+ ObjectId b = commit(ow, treeB, new ObjectId[] {});
+ ObjectId o = commit(ow, treeO, new ObjectId[] { b });
+ ObjectId t = commit(ow, treeT, new ObjectId[] { b });
+
+ Merger resolveMerger = MergeStrategy.RESOLVE.newMerger(db);
+ boolean merge = resolveMerger.merge(new ObjectId[] { o, t });
+ assertFalse(merge);
+ }
+
+ @Test
+ public void testGitLinkMerging_linkBlobDeleted() throws Exception {
+ // We changed a link to a blob, others has deleted this link.
+ DirCache treeB = db.readDirCache();
+ DirCache treeO = db.readDirCache();
+ DirCache treeT = db.readDirCache();
+
+ DirCacheBuilder bTreeBuilder = treeB.builder();
+ DirCacheBuilder oTreeBuilder = treeO.builder();
+ DirCacheBuilder tTreeBuilder = treeT.builder();
+
+ maybeAddLink(bTreeBuilder, LINK_ID1);
+ oTreeBuilder.add(
+ createEntry(SUBMODULE_PATH, FileMode.REGULAR_FILE, "blob 2"));
+
+ bTreeBuilder.finish();
+ oTreeBuilder.finish();
+ tTreeBuilder.finish();
+
+ ObjectInserter ow = db.newObjectInserter();
+ ObjectId b = commit(ow, treeB, new ObjectId[] {});
+ ObjectId o = commit(ow, treeO, new ObjectId[] { b });
+ ObjectId t = commit(ow, treeT, new ObjectId[] { b });
+
+ Merger resolveMerger = MergeStrategy.RESOLVE.newMerger(db);
+ boolean merge = resolveMerger.merge(new ObjectId[] { o, t });
+ assertFalse(merge);
+ }
+
+ private void maybeAddLink(DirCacheBuilder builder,
+ @Nullable String linkId) {
+ if (linkId == null) {
+ return;
+ }
+ DirCacheEntry newLink = createGitLink(SUBMODULE_PATH,
+ ObjectId.fromString(linkId));
+ builder.add(newLink);
+ }
+
+ private void assertGitLinkValue(Merger resolveMerger, String expectedValue)
+ throws Exception {
+ try (TreeWalk tw = new TreeWalk(db)) {
+ tw.setRecursive(true);
+ tw.reset(resolveMerger.getResultTreeId());
+
+ assertTrue(tw.next());
+ assertEquals(SUBMODULE_PATH, tw.getPathString());
+ assertEquals(ObjectId.fromString(expectedValue), tw.getObjectId(0));
+
+ assertFalse(tw.next());
+ }
+ }
+
+ private void assertGitLinkDoesntExist(Merger resolveMerger)
+ throws Exception {
+ try (TreeWalk tw = new TreeWalk(db)) {
+ tw.setRecursive(true);
+ tw.reset(resolveMerger.getResultTreeId());
+
+ assertFalse(tw.next());
+ }
+ }
+
+ private static ObjectId commit(ObjectInserter odi, DirCache treeB,
+ ObjectId[] parentIds) throws Exception {
+ CommitBuilder c = new CommitBuilder();
+ c.setTreeId(treeB.writeTree(odi));
+ c.setAuthor(new PersonIdent("A U Thor", "a.u.thor", 1L, 0));
+ c.setCommitter(c.getAuthor());
+ c.setParentIds(parentIds);
+ c.setMessage("Tree " + c.getTreeId().name());
+ ObjectId id = odi.insert(c);
+ odi.flush();
+ return id;
+ }
+}
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/merge/ResolveMerger.java b/org.eclipse.jgit/src/org/eclipse/jgit/merge/ResolveMerger.java
index 506d33312..6c217fdf2 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/merge/ResolveMerger.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/merge/ResolveMerger.java
@@ -588,7 +588,8 @@ protected boolean processEntry(CanonicalTreeParser base,
final int modeO = tw.getRawMode(T_OURS);
final int modeT = tw.getRawMode(T_THEIRS);
final int modeB = tw.getRawMode(T_BASE);
-
+ boolean gitLinkMerging = isGitLink(modeO) || isGitLink(modeT)
+ || isGitLink(modeB);
if (modeO == 0 && modeT == 0 && modeB == 0)
// File is either untracked or new, staged but uncommitted
return true;
@@ -737,31 +738,28 @@ protected boolean processEntry(CanonicalTreeParser base,
return false;
}
- boolean gitlinkConflict = isGitLink(modeO) || isGitLink(modeT);
- // Don't attempt to resolve submodule link conflicts
- if (gitlinkConflict || !attributes.canBeContentMerged()) {
+ if (gitLinkMerging && ignoreConflicts) {
+ // Always select 'ours' in case of GITLINK merge failures so
+ // a caller can use virtual commit.
+ add(tw.getRawPath(), ours, DirCacheEntry.STAGE_0, EPOCH, 0);
+ return true;
+ } else if (gitLinkMerging) {
+ add(tw.getRawPath(), base, DirCacheEntry.STAGE_1, EPOCH, 0);
+ add(tw.getRawPath(), ours, DirCacheEntry.STAGE_2, EPOCH, 0);
+ add(tw.getRawPath(), theirs, DirCacheEntry.STAGE_3, EPOCH, 0);
+ MergeResult result = createGitLinksMergeResult(
+ base, ours, theirs);
+ result.setContainsConflicts(true);
+ mergeResults.put(tw.getPathString(), result);
+ unmergedPaths.add(tw.getPathString());
+ return true;
+ } else if (!attributes.canBeContentMerged()) {
add(tw.getRawPath(), base, DirCacheEntry.STAGE_1, EPOCH, 0);
add(tw.getRawPath(), ours, DirCacheEntry.STAGE_2, EPOCH, 0);
add(tw.getRawPath(), theirs, DirCacheEntry.STAGE_3, EPOCH, 0);
- if (gitlinkConflict) {
- MergeResult result = new MergeResult<>(
- Arrays.asList(
- new SubmoduleConflict(base == null ? null
- : base.getEntryObjectId()),
- new SubmoduleConflict(ours == null ? null
- : ours.getEntryObjectId()),
- new SubmoduleConflict(theirs == null ? null
- : theirs.getEntryObjectId())));
- result.setContainsConflicts(true);
- mergeResults.put(tw.getPathString(), result);
- if (!ignoreConflicts) {
- unmergedPaths.add(tw.getPathString());
- }
- } else {
- // attribute merge issues are conflicts but not failures
- unmergedPaths.add(tw.getPathString());
- }
+ // attribute merge issues are conflicts but not failures
+ unmergedPaths.add(tw.getPathString());
return true;
}
@@ -786,45 +784,73 @@ protected boolean processEntry(CanonicalTreeParser base,
// OURS or THEIRS has been deleted
if (((modeO != 0 && !tw.idEqual(T_BASE, T_OURS)) || (modeT != 0 && !tw
.idEqual(T_BASE, T_THEIRS)))) {
- MergeResult result = contentMerge(base, ours, theirs,
- attributes);
-
- if (ignoreConflicts) {
- // In case a conflict is detected the working tree file is
- // again filled with new content (containing conflict
- // markers). But also stage 0 of the index is filled with
- // that content.
- result.setContainsConflicts(false);
- updateIndex(base, ours, theirs, result, attributes);
- } else {
+ if (gitLinkMerging && ignoreConflicts) {
+ add(tw.getRawPath(), ours, DirCacheEntry.STAGE_0, EPOCH, 0);
+ } else if (gitLinkMerging) {
add(tw.getRawPath(), base, DirCacheEntry.STAGE_1, EPOCH, 0);
add(tw.getRawPath(), ours, DirCacheEntry.STAGE_2, EPOCH, 0);
- DirCacheEntry e = add(tw.getRawPath(), theirs,
- DirCacheEntry.STAGE_3, EPOCH, 0);
+ add(tw.getRawPath(), theirs, DirCacheEntry.STAGE_3, EPOCH, 0);
+ MergeResult result = createGitLinksMergeResult(
+ base, ours, theirs);
+ result.setContainsConflicts(true);
+ mergeResults.put(tw.getPathString(), result);
+ unmergedPaths.add(tw.getPathString());
+ } else {
+ MergeResult result = contentMerge(base, ours,
+ theirs, attributes);
- // OURS was deleted checkout THEIRS
- if (modeO == 0) {
- // Check worktree before checking out THEIRS
- if (isWorktreeDirty(work, ourDce)) {
- return false;
- }
- if (nonTree(modeT)) {
- if (e != null) {
- addToCheckout(tw.getPathString(), e, attributes);
+ if (ignoreConflicts) {
+ // In case a conflict is detected the working tree file
+ // is again filled with new content (containing conflict
+ // markers). But also stage 0 of the index is filled
+ // with that content.
+ result.setContainsConflicts(false);
+ updateIndex(base, ours, theirs, result, attributes);
+ } else {
+ add(tw.getRawPath(), base, DirCacheEntry.STAGE_1, EPOCH,
+ 0);
+ add(tw.getRawPath(), ours, DirCacheEntry.STAGE_2, EPOCH,
+ 0);
+ DirCacheEntry e = add(tw.getRawPath(), theirs,
+ DirCacheEntry.STAGE_3, EPOCH, 0);
+
+ // OURS was deleted checkout THEIRS
+ if (modeO == 0) {
+ // Check worktree before checking out THEIRS
+ if (isWorktreeDirty(work, ourDce)) {
+ return false;
+ }
+ if (nonTree(modeT)) {
+ if (e != null) {
+ addToCheckout(tw.getPathString(), e,
+ attributes);
+ }
}
}
+
+ unmergedPaths.add(tw.getPathString());
+
+ // generate a MergeResult for the deleted file
+ mergeResults.put(tw.getPathString(), result);
}
-
- unmergedPaths.add(tw.getPathString());
-
- // generate a MergeResult for the deleted file
- mergeResults.put(tw.getPathString(), result);
}
}
}
return true;
}
+ private static MergeResult createGitLinksMergeResult(
+ CanonicalTreeParser base, CanonicalTreeParser ours,
+ CanonicalTreeParser theirs) {
+ return new MergeResult<>(Arrays.asList(
+ new SubmoduleConflict(
+ base == null ? null : base.getEntryObjectId()),
+ new SubmoduleConflict(
+ ours == null ? null : ours.getEntryObjectId()),
+ new SubmoduleConflict(
+ theirs == null ? null : theirs.getEntryObjectId())));
+ }
+
/**
* Does the content merge. The three texts base, ours and theirs are
* specified with {@link CanonicalTreeParser}. If any of the parsers is