jetbrains.buildServer.buildTriggers.vcs.git.agent.command.impl.CleanCommandImpl.java Source code

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Here is the source code for jetbrains.buildServer.buildTriggers.vcs.git.agent.command.impl.CleanCommandImpl.java

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/*
 * Copyright 2000-2014 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 jetbrains.buildServer.buildTriggers.vcs.git.agent.command.impl;

import com.intellij.openapi.util.SystemInfo;
import jetbrains.buildServer.ExecResult;
import jetbrains.buildServer.buildTriggers.vcs.git.AgentCleanFilesPolicy;
import jetbrains.buildServer.buildTriggers.vcs.git.agent.GitCommandLine;
import jetbrains.buildServer.buildTriggers.vcs.git.agent.command.CleanCommand;
import jetbrains.buildServer.log.Loggers;
import jetbrains.buildServer.util.FileUtil;
import jetbrains.buildServer.util.Predicate;
import jetbrains.buildServer.vcs.VcsException;
import org.eclipse.jgit.api.Status;
import org.eclipse.jgit.api.errors.JGitInternalException;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.IndexDiff;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.lib.RepositoryBuilder;
import org.eclipse.jgit.treewalk.FileTreeIterator;
import org.jetbrains.annotations.NotNull;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;

public class CleanCommandImpl extends BaseCommandImpl implements CleanCommand {

    private AgentCleanFilesPolicy myCleanPolicy = AgentCleanFilesPolicy.ALL_UNTRACKED;

    public CleanCommandImpl(@NotNull GitCommandLine cmd) {
        super(cmd);
    }

    @NotNull
    public CleanCommand setCleanPolicy(@NotNull AgentCleanFilesPolicy policy) {
        myCleanPolicy = policy;
        return this;
    }

    public void call() throws VcsException {
        GitCommandLine cmd = getCmd();
        cmd.addParameters("clean", "-f", "-d");
        switch (myCleanPolicy) {
        case ALL_UNTRACKED:
            cmd.addParameter("-x");
            break;
        case IGNORED_ONLY:
            cmd.addParameter("-X");
            break;
        case NON_IGNORED_ONLY:
            break;
        }
        try {
            ExecResult r = CommandUtil.runCommand(cmd);
            CommandUtil.failIfNotEmptyStdErr(cmd, r);
        } catch (VcsException e) {
            Loggers.VCS.warn("Failed to clean files");
            if (!SystemInfo.isWindows || CommandUtil.isCanceledError(e))
                throw e;
            File workingDir = cmd.getWorkingDirectory();
            if (workingDir == null)
                throw e;
            handleLongFileNames(workingDir, e);
        }
    }

    private void handleLongFileNames(@NotNull File rootDir, @NotNull VcsException originalError)
            throws VcsException {
        List<String> files = new ArrayList<String>();
        FileUtil.listFilesRecursively(rootDir, "", true, Integer.MAX_VALUE, new Predicate<File>() {
            public boolean apply(File f) {
                return true;
            }
        }, files);

        int targetDirLength = rootDir.getAbsolutePath().length();
        List<String> longFileNames = new ArrayList<String>();
        for (String f : files) {
            if (targetDirLength + 1 + f.length() >= 256)
                longFileNames.add(f);
        }

        if (longFileNames.isEmpty()) {
            Loggers.VCS.info("No files with long names found");
            throw originalError;
        } else {
            Loggers.VCS.info(longFileNames.size() + " files with long names found:");
            for (String f : longFileNames) {
                Loggers.VCS.info(f);
            }
            Loggers.VCS.info("Try removing files with long names manually");
        }

        Repository repository = null;
        try {
            repository = new RepositoryBuilder().setWorkTree(rootDir).build();
            WorkingDirStatus status = getWorkingDirStatus(repository);
            Set<String> untracked = status.getUntracked();
            for (String f : longFileNames) {
                if (untracked.contains(f) || status.isIgnored(f)) {
                    FileUtil.delete(new File(rootDir, f));
                    Loggers.VCS.info(f + " is removed");
                } else {
                    Loggers.VCS.info("The file " + f + " is tracked, don't remove it");
                }
            }
        } catch (Exception e1) {
            Loggers.VCS.error("Error while cleaning files with long names", e1);
        } finally {
            if (repository != null)
                repository.close();
        }
    }

    @NotNull
    private WorkingDirStatus getWorkingDirStatus(@NotNull Repository repo) {
        FileTreeIterator workingTreeIt = new FileTreeIterator(repo);
        try {
            IndexDiff diff = new IndexDiff(repo, Constants.HEAD, workingTreeIt);
            diff.diff();
            return new WorkingDirStatus(diff);
        } catch (IOException e) {
            throw new JGitInternalException(e.getMessage(), e);
        }
    }

    private static class WorkingDirStatus extends Status {
        private IndexDiff myDiff;

        private WorkingDirStatus(IndexDiff diff) {
            super(diff);
            myDiff = diff;
        }

        boolean isIgnored(@NotNull String file) {
            for (String prefix : myDiff.getIgnoredNotInIndex()) {
                if (file.startsWith(prefix))
                    return true;
            }
            return false;
        }
    }
}