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/*
* Copyright 2000-2012 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package git4idea.ui.branch;
import com.intellij.util.containers.ContainerUtil;
import git4idea.GitBranch;
import git4idea.GitLocalBranch;
import git4idea.GitRemoteBranch;
import git4idea.branch.GitBranchUtil;
import git4idea.repo.GitBranchTrackInfo;
import git4idea.repo.GitRepository;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
/**
* @author Kirill Likhodedov
*/
public class GitMultiRootBranchConfig {
private final Collection<GitRepository> myRepositories;
public GitMultiRootBranchConfig(@NotNull Collection<GitRepository> repositories) {
myRepositories = repositories;
}
boolean diverged() {
return getCurrentBranch() == null;
}
@Nullable
public String getCurrentBranch() {
String commonBranch = null;
for (GitRepository repository : myRepositories) {
GitBranch branch = repository.getCurrentBranch();
if (branch == null) {
return null;
}
// NB: if all repositories are in the rebasing state on the same branches, this branch is returned
if (commonBranch == null) {
commonBranch = branch.getName();
} else if (!commonBranch.equals(branch.getName())) {
return null;
}
}
return commonBranch;
}
@Nullable
GitRepository.State getState() {
GitRepository.State commonState = null;
for (GitRepository repository : myRepositories) {
GitRepository.State state = repository.getState();
if (commonState == null) {
commonState = state;
} else if (!commonState.equals(state)) {
return null;
}
}
return commonState;
}
@NotNull
Collection<String> getLocalBranches() {
return GitBranchUtil.getCommonBranches(myRepositories, true);
}
@NotNull
Collection<String> getRemoteBranches() {
return GitBranchUtil.getCommonBranches(myRepositories, false);
}
/**
* If there is a common remote branch which is commonly tracked by the given branch in all repositories,
* returns the name of this remote branch. Otherwise returns null. <br/>
* For one repository just returns the tracked branch or null if there is no tracked branch.
*/
@Nullable
public String getTrackedBranch(@NotNull String branch) {
String trackedName = null;
for (GitRepository repository : myRepositories) {
GitRemoteBranch tracked = getTrackedBranch(repository, branch);
if (tracked == null) {
return null;
}
if (trackedName == null) {
trackedName = tracked.getNameForLocalOperations();
}
else if (!trackedName.equals(tracked.getNameForLocalOperations())) {
return null;
}
}
return trackedName;
}
/**
* Returns local branches which track the given remote branch. Usually there is 0 or 1 such branches.
*/
@NotNull
public Collection<String> getTrackingBranches(@NotNull String remoteBranch) {
Collection<String> trackingBranches = null;
for (GitRepository repository : myRepositories) {
Collection<String> tb = getTrackingBranches(repository, remoteBranch);
if (trackingBranches == null) {
trackingBranches = tb;
}
else {
trackingBranches = ContainerUtil.intersection(trackingBranches, tb);
}
}
return trackingBranches == null ? Collections.<String>emptyList() : trackingBranches;
}
@NotNull
public static Collection<String> getTrackingBranches(@NotNull GitRepository repository, @NotNull String remoteBranch) {
Collection<String> trackingBranches = new ArrayList<String>(1);
for (GitBranchTrackInfo trackInfo : repository.getBranchTrackInfos()) {
if (remoteBranch.equals(trackInfo.getRemote().getName() + "/" + trackInfo.getRemoteBranch())) {
trackingBranches.add(trackInfo.getLocalBranch().getName());
}
}
return trackingBranches;
}
@Nullable
private static GitRemoteBranch getTrackedBranch(@NotNull GitRepository repository, @NotNull String branchName) {
GitLocalBranch branch = GitBranchUtil.findLocalBranchByName(repository, branchName);
return branch == null ? null : branch.findTrackedBranch(repository);
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
for (GitRepository repository : myRepositories) {
sb.append(repository.getPresentableUrl()).append(":").append(repository.getCurrentBranch()).append(":").append(repository.getState());
}
return sb.toString();
}
}
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