001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.maven.scm.provider.hg.command.update;
020
021import java.io.File;
022import java.util.ArrayList;
023import java.util.List;
024import java.util.Map;
025
026import org.apache.commons.lang3.StringUtils;
027import org.apache.maven.scm.ScmException;
028import org.apache.maven.scm.ScmFile;
029import org.apache.maven.scm.ScmFileSet;
030import org.apache.maven.scm.ScmFileStatus;
031import org.apache.maven.scm.ScmResult;
032import org.apache.maven.scm.ScmVersion;
033import org.apache.maven.scm.command.Command;
034import org.apache.maven.scm.command.changelog.ChangeLogCommand;
035import org.apache.maven.scm.command.update.AbstractUpdateCommand;
036import org.apache.maven.scm.command.update.UpdateScmResult;
037import org.apache.maven.scm.command.update.UpdateScmResultWithRevision;
038import org.apache.maven.scm.provider.ScmProviderRepository;
039import org.apache.maven.scm.provider.hg.HgUtils;
040import org.apache.maven.scm.provider.hg.command.HgCommandConstants;
041import org.apache.maven.scm.provider.hg.command.HgConsumer;
042import org.apache.maven.scm.provider.hg.command.changelog.HgChangeLogCommand;
043import org.apache.maven.scm.provider.hg.command.diff.HgDiffConsumer;
044
045/**
046 * @author <a href="mailto:thurner.rupert@ymono.net">thurner rupert</a>
047 * @author Olivier Lamy
048 */
049public class HgUpdateCommand extends AbstractUpdateCommand implements Command {
050    /**
051     * {@inheritDoc}
052     */
053    protected UpdateScmResult executeUpdateCommand(ScmProviderRepository repo, ScmFileSet fileSet, ScmVersion tag)
054            throws ScmException {
055        File workingDir = fileSet.getBasedir();
056
057        String[] updateCmd;
058        // Update branch
059        if (repo.isPushChanges()) {
060            updateCmd = new String[] {
061                HgCommandConstants.PULL_CMD,
062                HgCommandConstants.REVISION_OPTION,
063                tag != null && !StringUtils.isEmpty(tag.getName()) ? tag.getName() : "tip"
064            };
065        } else {
066            updateCmd = new String[] {
067                HgCommandConstants.UPDATE_CMD,
068                tag != null && !StringUtils.isEmpty(tag.getName()) ? tag.getName() : "tip",
069                HgCommandConstants.CLEAN_OPTION
070            };
071        }
072        ScmResult updateResult = HgUtils.execute(new HgConsumer(), workingDir, updateCmd);
073
074        if (!updateResult.isSuccess()) {
075            return new UpdateScmResult(null, null, updateResult);
076        }
077
078        // Find changes from last revision
079        int currentRevision = HgUtils.getCurrentRevisionNumber(workingDir);
080        int previousRevision = currentRevision - 1;
081        String[] diffCmd =
082                new String[] {HgCommandConstants.DIFF_CMD, HgCommandConstants.REVISION_OPTION, "" + previousRevision};
083        HgDiffConsumer diffConsumer = new HgDiffConsumer(workingDir);
084        ScmResult diffResult = HgUtils.execute(diffConsumer, workingDir, diffCmd);
085
086        // Now translate between diff and update file status
087        List<ScmFile> updatedFiles = new ArrayList<>();
088        List<CharSequence> changes = new ArrayList<>();
089        List<ScmFile> diffFiles = diffConsumer.getChangedFiles();
090        Map<String, CharSequence> diffChanges = diffConsumer.getDifferences();
091        for (ScmFile file : diffFiles) {
092            changes.add(diffChanges.get(file.getPath()));
093            if (file.getStatus() == ScmFileStatus.MODIFIED) {
094                updatedFiles.add(new ScmFile(file.getPath(), ScmFileStatus.PATCHED));
095            } else {
096                updatedFiles.add(file);
097            }
098        }
099
100        if (repo.isPushChanges()) {
101            String[] hgUpdateCmd = new String[] {HgCommandConstants.UPDATE_CMD};
102            HgUtils.execute(new HgConsumer(), workingDir, hgUpdateCmd);
103        }
104
105        return new UpdateScmResultWithRevision(
106                updatedFiles, new ArrayList<>(0), String.valueOf(currentRevision), diffResult);
107    }
108
109    protected ChangeLogCommand getChangeLogCommand() {
110        return new HgChangeLogCommand();
111    }
112}