Package com.google.gerrit.server.git

Class MergeUtil

java.lang.Object

com.google.gerrit.server.git.MergeUtil

public class MergeUtil
extends Object

Utility methods used during the merge process.

Note: Unless otherwise specified, the methods in this class do not flush ObjectInserters. Callers that want to read back objects before flushing should use ObjectInserter.newReader(). This is already the default behavior of BatchUpdate.

Method Summary

Modifier and Type	Method	Description
boolean	canCherryPick(MergeSorter mergeSorter, org.eclipse.jgit.lib.Repository repo, CodeReviewCommit mergeTip, CodeReviewCommit.CodeReviewRevWalk rw, CodeReviewCommit toMerge)
boolean	canFastForward(MergeSorter mergeSorter, CodeReviewCommit mergeTip, CodeReviewCommit.CodeReviewRevWalk rw, CodeReviewCommit toMerge)
boolean	canFastForwardOrMerge(MergeSorter mergeSorter, CodeReviewCommit mergeTip, CodeReviewCommit.CodeReviewRevWalk rw, org.eclipse.jgit.lib.Repository repo, CodeReviewCommit toMerge)
boolean	canMerge(MergeSorter mergeSorter, org.eclipse.jgit.lib.Repository repo, CodeReviewCommit mergeTip, CodeReviewCommit toMerge)
CodeReviewCommit	createCherryPickFromCommit(org.eclipse.jgit.lib.ObjectInserter inserter, org.eclipse.jgit.lib.Config repoConfig, org.eclipse.jgit.revwalk.RevCommit mergeTip, org.eclipse.jgit.revwalk.RevCommit originalCommit, org.eclipse.jgit.lib.PersonIdent cherryPickCommitterIdent, String commitMsg, CodeReviewCommit.CodeReviewRevWalk rw, int parentIndex, boolean ignoreIdenticalTree, boolean allowConflicts)
CodeReviewCommit	createCherryPickFromCommit(org.eclipse.jgit.lib.ObjectInserter inserter, org.eclipse.jgit.lib.Config repoConfig, org.eclipse.jgit.revwalk.RevCommit mergeTip, org.eclipse.jgit.revwalk.RevCommit originalCommit, org.eclipse.jgit.lib.PersonIdent cherryPickCommitterIdent, String commitMsg, CodeReviewCommit.CodeReviewRevWalk rw, int parentIndex, boolean ignoreIdenticalTree, boolean allowConflicts, boolean diff3Format)
String	createCommitMessageOnSubmit(CodeReviewCommit n, org.eclipse.jgit.revwalk.RevCommit mergeTip)
String	createCommitMessageOnSubmit(org.eclipse.jgit.revwalk.RevCommit n, org.eclipse.jgit.revwalk.RevCommit mergeTip, ChangeNotes notes, PatchSet.Id id)	Creates a commit message for a change, which can be customized by plugins.
static String	createConflictMessage(List<String> conflicts)
static CodeReviewCommit	createMergeCommit(org.eclipse.jgit.lib.ObjectInserter inserter, org.eclipse.jgit.lib.Config repoConfig, org.eclipse.jgit.revwalk.RevCommit mergeTip, org.eclipse.jgit.revwalk.RevCommit originalCommit, String mergeStrategy, boolean allowConflicts, org.eclipse.jgit.lib.PersonIdent committerIdent, String commitMsg, CodeReviewCommit.CodeReviewRevWalk rw)
static CodeReviewCommit	createMergeCommit(org.eclipse.jgit.lib.ObjectInserter inserter, org.eclipse.jgit.lib.Config repoConfig, org.eclipse.jgit.revwalk.RevCommit mergeTip, org.eclipse.jgit.revwalk.RevCommit originalCommit, String mergeStrategy, boolean allowConflicts, org.eclipse.jgit.lib.PersonIdent authorIdent, org.eclipse.jgit.lib.PersonIdent committerIdent, String commitMsg, CodeReviewCommit.CodeReviewRevWalk rw)
static CodeReviewCommit	findAnyMergedInto(CodeReviewCommit.CodeReviewRevWalk rw, Iterable<CodeReviewCommit> commits, CodeReviewCommit tip)
Set<Change.Id>	findUnmergedChanges(Set<Change.Id> expected, CodeReviewCommit.CodeReviewRevWalk rw, org.eclipse.jgit.revwalk.RevFlag canMergeFlag, CodeReviewCommit oldTip, CodeReviewCommit mergeTip, Iterable<Change.Id> alreadyMerged)
CodeReviewCommit	getFirstFastForward(CodeReviewCommit mergeTip, org.eclipse.jgit.revwalk.RevWalk rw, List<CodeReviewCommit> toMerge)
static org.eclipse.jgit.merge.ThreeWayMergeStrategy	getMergeStrategy(org.eclipse.jgit.lib.Config cfg)
boolean	hasMissingDependencies(MergeSorter mergeSorter, CodeReviewCommit toMerge)
void	markCleanMerges(org.eclipse.jgit.revwalk.RevWalk rw, org.eclipse.jgit.revwalk.RevFlag canMergeFlag, CodeReviewCommit mergeTip, Set<org.eclipse.jgit.revwalk.RevCommit> alreadyAccepted)
CodeReviewCommit	mergeOneCommit(org.eclipse.jgit.lib.PersonIdent author, org.eclipse.jgit.lib.PersonIdent committer, CodeReviewCommit.CodeReviewRevWalk rw, org.eclipse.jgit.lib.ObjectInserter inserter, org.eclipse.jgit.lib.Config repoConfig, BranchNameKey destBranch, CodeReviewCommit mergeTip, CodeReviewCommit n)
String	mergeStrategyName()
static String	mergeStrategyName(boolean useContentMerge, boolean useRecursiveMerge)
static org.eclipse.jgit.lib.ObjectId	mergeWithConflicts(org.eclipse.jgit.revwalk.RevWalk rw, org.eclipse.jgit.lib.ObjectInserter ins, org.eclipse.jgit.dircache.DirCache dc, String oursName, org.eclipse.jgit.revwalk.RevCommit ours, String theirsName, org.eclipse.jgit.revwalk.RevCommit theirs, Map<String,org.eclipse.jgit.merge.MergeResult<? extends org.eclipse.jgit.diff.Sequence>> mergeResults)
static org.eclipse.jgit.lib.ObjectId	mergeWithConflicts(org.eclipse.jgit.revwalk.RevWalk rw, org.eclipse.jgit.lib.ObjectInserter ins, org.eclipse.jgit.dircache.DirCache dc, String oursName, org.eclipse.jgit.revwalk.RevCommit ours, String theirsName, org.eclipse.jgit.revwalk.RevCommit theirs, Map<String,org.eclipse.jgit.merge.MergeResult<? extends org.eclipse.jgit.diff.Sequence>> mergeResults, boolean diff3Format)
static org.eclipse.jgit.merge.Merger	newMerger(org.eclipse.jgit.lib.ObjectInserter inserter, org.eclipse.jgit.lib.Config repoConfig, String strategyName)
org.eclipse.jgit.merge.ThreeWayMerger	newThreeWayMerger(org.eclipse.jgit.lib.ObjectInserter inserter, org.eclipse.jgit.lib.Config repoConfig)
static org.eclipse.jgit.merge.ThreeWayMerger	newThreeWayMerger(org.eclipse.jgit.lib.ObjectInserter inserter, org.eclipse.jgit.lib.Config repoConfig, String strategyName)
List<CodeReviewCommit>	reduceToMinimalMerge(MergeSorter mergeSorter, Collection<CodeReviewCommit> toSort)
static org.eclipse.jgit.revwalk.RevCommit	resolveCommit(org.eclipse.jgit.lib.Repository repo, org.eclipse.jgit.revwalk.RevWalk rw, String str)
static boolean	useRecursiveMerge(org.eclipse.jgit.lib.Config cfg)
CodeReviewCommit	writeMergeCommit(org.eclipse.jgit.lib.PersonIdent author, org.eclipse.jgit.lib.PersonIdent committer, CodeReviewCommit.CodeReviewRevWalk rw, org.eclipse.jgit.lib.ObjectInserter inserter, BranchNameKey destBranch, CodeReviewCommit mergeTip, org.eclipse.jgit.lib.ObjectId treeId, CodeReviewCommit n)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

useRecursiveMerge

public static boolean useRecursiveMerge(org.eclipse.jgit.lib.Config cfg)

getMergeStrategy

public static org.eclipse.jgit.merge.ThreeWayMergeStrategy getMergeStrategy(org.eclipse.jgit.lib.Config cfg)

getFirstFastForward

public CodeReviewCommit getFirstFastForward(CodeReviewCommit mergeTip,
 org.eclipse.jgit.revwalk.RevWalk rw,
 List<CodeReviewCommit> toMerge)

reduceToMinimalMerge

public List<CodeReviewCommit> reduceToMinimalMerge(MergeSorter mergeSorter,
 Collection<CodeReviewCommit> toSort)

createCherryPickFromCommit

public CodeReviewCommit createCherryPickFromCommit(org.eclipse.jgit.lib.ObjectInserter inserter,
 org.eclipse.jgit.lib.Config repoConfig,
 org.eclipse.jgit.revwalk.RevCommit mergeTip,
 org.eclipse.jgit.revwalk.RevCommit originalCommit,
 org.eclipse.jgit.lib.PersonIdent cherryPickCommitterIdent,
 String commitMsg,
 CodeReviewCommit.CodeReviewRevWalk rw,
 int parentIndex,
 boolean ignoreIdenticalTree,
 boolean allowConflicts)
                                            throws IOException,
MergeIdenticalTreeException,
MergeConflictException,
MethodNotAllowedException,
com.google.gerrit.exceptions.InvalidMergeStrategyException

Throws:

IOException

MergeIdenticalTreeException

MergeConflictException

MethodNotAllowedException

com.google.gerrit.exceptions.InvalidMergeStrategyException

createCherryPickFromCommit

public CodeReviewCommit createCherryPickFromCommit(org.eclipse.jgit.lib.ObjectInserter inserter,
 org.eclipse.jgit.lib.Config repoConfig,
 org.eclipse.jgit.revwalk.RevCommit mergeTip,
 org.eclipse.jgit.revwalk.RevCommit originalCommit,
 org.eclipse.jgit.lib.PersonIdent cherryPickCommitterIdent,
 String commitMsg,
 CodeReviewCommit.CodeReviewRevWalk rw,
 int parentIndex,
 boolean ignoreIdenticalTree,
 boolean allowConflicts,
 boolean diff3Format)
                                            throws IOException,
MergeIdenticalTreeException,
MergeConflictException,
MethodNotAllowedException,
com.google.gerrit.exceptions.InvalidMergeStrategyException

Throws:

IOException

MergeIdenticalTreeException

MergeConflictException

MethodNotAllowedException

com.google.gerrit.exceptions.InvalidMergeStrategyException

mergeWithConflicts

public static org.eclipse.jgit.lib.ObjectId mergeWithConflicts(org.eclipse.jgit.revwalk.RevWalk rw,
 org.eclipse.jgit.lib.ObjectInserter ins,
 org.eclipse.jgit.dircache.DirCache dc,
 String oursName,
 org.eclipse.jgit.revwalk.RevCommit ours,
 String theirsName,
 org.eclipse.jgit.revwalk.RevCommit theirs,
 Map<String,org.eclipse.jgit.merge.MergeResult<? extends org.eclipse.jgit.diff.Sequence>> mergeResults)
                                                        throws IOException

Throws:

IOException

mergeWithConflicts

public static org.eclipse.jgit.lib.ObjectId mergeWithConflicts(org.eclipse.jgit.revwalk.RevWalk rw,
 org.eclipse.jgit.lib.ObjectInserter ins,
 org.eclipse.jgit.dircache.DirCache dc,
 String oursName,
 org.eclipse.jgit.revwalk.RevCommit ours,
 String theirsName,
 org.eclipse.jgit.revwalk.RevCommit theirs,
 Map<String,org.eclipse.jgit.merge.MergeResult<? extends org.eclipse.jgit.diff.Sequence>> mergeResults,
 boolean diff3Format)
                                                        throws IOException

Throws:

IOException

createMergeCommit

public static CodeReviewCommit createMergeCommit(org.eclipse.jgit.lib.ObjectInserter inserter,
 org.eclipse.jgit.lib.Config repoConfig,
 org.eclipse.jgit.revwalk.RevCommit mergeTip,
 org.eclipse.jgit.revwalk.RevCommit originalCommit,
 String mergeStrategy,
 boolean allowConflicts,
 org.eclipse.jgit.lib.PersonIdent committerIdent,
 String commitMsg,
 CodeReviewCommit.CodeReviewRevWalk rw)
                                          throws IOException,
MergeIdenticalTreeException,
MergeConflictException,
com.google.gerrit.exceptions.InvalidMergeStrategyException

Throws:

IOException

MergeIdenticalTreeException

MergeConflictException

com.google.gerrit.exceptions.InvalidMergeStrategyException

createMergeCommit

public static CodeReviewCommit createMergeCommit(org.eclipse.jgit.lib.ObjectInserter inserter,
 org.eclipse.jgit.lib.Config repoConfig,
 org.eclipse.jgit.revwalk.RevCommit mergeTip,
 org.eclipse.jgit.revwalk.RevCommit originalCommit,
 String mergeStrategy,
 boolean allowConflicts,
 org.eclipse.jgit.lib.PersonIdent authorIdent,
 org.eclipse.jgit.lib.PersonIdent committerIdent,
 String commitMsg,
 CodeReviewCommit.CodeReviewRevWalk rw)
                                          throws IOException,
MergeIdenticalTreeException,
MergeConflictException,
com.google.gerrit.exceptions.InvalidMergeStrategyException

Throws:

IOException

MergeIdenticalTreeException

MergeConflictException

com.google.gerrit.exceptions.InvalidMergeStrategyException

createConflictMessage

public static String createConflictMessage(List<String> conflicts)

createCommitMessageOnSubmit

public String createCommitMessageOnSubmit(CodeReviewCommit n,
 org.eclipse.jgit.revwalk.RevCommit mergeTip)

createCommitMessageOnSubmit

public String createCommitMessageOnSubmit(org.eclipse.jgit.revwalk.RevCommit n,
 org.eclipse.jgit.revwalk.RevCommit mergeTip,
 ChangeNotes notes,
 PatchSet.Id id)

Creates a commit message for a change, which can be customized by plugins.

By default, adds footers to existing commit message based on the state of the change. Plugins implementing ChangeMessageModifier can modify the resulting commit message arbitrarily.

Returns:

new message

canMerge

public boolean canMerge(MergeSorter mergeSorter,
 org.eclipse.jgit.lib.Repository repo,
 CodeReviewCommit mergeTip,
 CodeReviewCommit toMerge)

canFastForward

public boolean canFastForward(MergeSorter mergeSorter,
 CodeReviewCommit mergeTip,
 CodeReviewCommit.CodeReviewRevWalk rw,
 CodeReviewCommit toMerge)

canFastForwardOrMerge

public boolean canFastForwardOrMerge(MergeSorter mergeSorter,
 CodeReviewCommit mergeTip,
 CodeReviewCommit.CodeReviewRevWalk rw,
 org.eclipse.jgit.lib.Repository repo,
 CodeReviewCommit toMerge)

canCherryPick

public boolean canCherryPick(MergeSorter mergeSorter,
 org.eclipse.jgit.lib.Repository repo,
 CodeReviewCommit mergeTip,
 CodeReviewCommit.CodeReviewRevWalk rw,
 CodeReviewCommit toMerge)

hasMissingDependencies

public boolean hasMissingDependencies(MergeSorter mergeSorter,
 CodeReviewCommit toMerge)

mergeOneCommit

public CodeReviewCommit mergeOneCommit(org.eclipse.jgit.lib.PersonIdent author,
 org.eclipse.jgit.lib.PersonIdent committer,
 CodeReviewCommit.CodeReviewRevWalk rw,
 org.eclipse.jgit.lib.ObjectInserter inserter,
 org.eclipse.jgit.lib.Config repoConfig,
 BranchNameKey destBranch,
 CodeReviewCommit mergeTip,
 CodeReviewCommit n)
                                throws com.google.gerrit.exceptions.InvalidMergeStrategyException

Throws:

com.google.gerrit.exceptions.InvalidMergeStrategyException

writeMergeCommit

public CodeReviewCommit writeMergeCommit(org.eclipse.jgit.lib.PersonIdent author,
 org.eclipse.jgit.lib.PersonIdent committer,
 CodeReviewCommit.CodeReviewRevWalk rw,
 org.eclipse.jgit.lib.ObjectInserter inserter,
 BranchNameKey destBranch,
 CodeReviewCommit mergeTip,
 org.eclipse.jgit.lib.ObjectId treeId,
 CodeReviewCommit n)
                                  throws IOException,
org.eclipse.jgit.errors.MissingObjectException,
org.eclipse.jgit.errors.IncorrectObjectTypeException

Throws:

IOException

org.eclipse.jgit.errors.MissingObjectException

org.eclipse.jgit.errors.IncorrectObjectTypeException

newThreeWayMerger

public org.eclipse.jgit.merge.ThreeWayMerger newThreeWayMerger(org.eclipse.jgit.lib.ObjectInserter inserter,
 org.eclipse.jgit.lib.Config repoConfig)
                                                        throws com.google.gerrit.exceptions.InvalidMergeStrategyException

Throws:

com.google.gerrit.exceptions.InvalidMergeStrategyException

mergeStrategyName

public String mergeStrategyName()

mergeStrategyName

public static String mergeStrategyName(boolean useContentMerge,
 boolean useRecursiveMerge)

newThreeWayMerger

public static org.eclipse.jgit.merge.ThreeWayMerger newThreeWayMerger(org.eclipse.jgit.lib.ObjectInserter inserter,
 org.eclipse.jgit.lib.Config repoConfig,
 String strategyName)
                                                               throws com.google.gerrit.exceptions.InvalidMergeStrategyException

Throws:

com.google.gerrit.exceptions.InvalidMergeStrategyException

newMerger

public static org.eclipse.jgit.merge.Merger newMerger(org.eclipse.jgit.lib.ObjectInserter inserter,
 org.eclipse.jgit.lib.Config repoConfig,
 String strategyName)
                                               throws com.google.gerrit.exceptions.InvalidMergeStrategyException

Throws:

com.google.gerrit.exceptions.InvalidMergeStrategyException

markCleanMerges

public void markCleanMerges(org.eclipse.jgit.revwalk.RevWalk rw,
 org.eclipse.jgit.revwalk.RevFlag canMergeFlag,
 CodeReviewCommit mergeTip,
 Set<org.eclipse.jgit.revwalk.RevCommit> alreadyAccepted)

findUnmergedChanges

public Set<Change.Id> findUnmergedChanges(Set<Change.Id> expected,
 CodeReviewCommit.CodeReviewRevWalk rw,
 org.eclipse.jgit.revwalk.RevFlag canMergeFlag,
 CodeReviewCommit oldTip,
 CodeReviewCommit mergeTip,
 Iterable<Change.Id> alreadyMerged)

findAnyMergedInto

public static CodeReviewCommit findAnyMergedInto(CodeReviewCommit.CodeReviewRevWalk rw,
 Iterable<CodeReviewCommit> commits,
 CodeReviewCommit tip)
                                          throws IOException

Throws:

IOException

resolveCommit

public static org.eclipse.jgit.revwalk.RevCommit resolveCommit(org.eclipse.jgit.lib.Repository repo,
 org.eclipse.jgit.revwalk.RevWalk rw,
 String str)
                                                        throws BadRequestException,
ResourceNotFoundException,
IOException

Throws:

BadRequestException

ResourceNotFoundException

IOException