com.facebook.buck.rage.VcsInfoCollector.java Source code

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Here is the source code for com.facebook.buck.rage.VcsInfoCollector.java

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/*
 * Copyright 2016-present Facebook, Inc.
 *
 * 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 com.facebook.buck.rage;

import static com.facebook.buck.util.versioncontrol.VersionControlStatsGenerator.TRACKED_BOOKMARKS;

import com.facebook.buck.util.immutables.BuckStyleImmutable;
import com.facebook.buck.util.versioncontrol.VersionControlCmdLineInterface;
import com.facebook.buck.util.versioncontrol.VersionControlCommandFailedException;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;

import org.immutables.value.Value;

import java.util.Map;
import java.util.Optional;

/**
 * Responsible foe getting information out of the version control system.
 */
public class VcsInfoCollector {

    private final VersionControlCmdLineInterface vcCmdLineInterface;

    private VcsInfoCollector(VersionControlCmdLineInterface vcCmdLineInterface) {
        this.vcCmdLineInterface = vcCmdLineInterface;
    }

    public static Optional<VcsInfoCollector> create(VersionControlCmdLineInterface vcCmdLineInterface) {
        if (!vcCmdLineInterface.isSupportedVersionControlSystem()) {
            return Optional.empty();
        }
        return Optional.of(new VcsInfoCollector(vcCmdLineInterface));
    }

    public SourceControlInfo gatherScmInformation()
            throws InterruptedException, VersionControlCommandFailedException {
        String currentRevisionId = vcCmdLineInterface.currentRevisionId();
        ImmutableMap<String, String> bookmarksRevisionIds = vcCmdLineInterface
                .bookmarksRevisionsId(TRACKED_BOOKMARKS);
        String baseRevisionId = vcCmdLineInterface.commonAncestor(currentRevisionId,
                bookmarksRevisionIds.get("remote/master"));
        ImmutableSet<String> changedFiles = vcCmdLineInterface.changedFiles(baseRevisionId);

        ImmutableSet.Builder<String> baseBookmarks = ImmutableSet.builder();
        for (Map.Entry<String, String> bookmark : bookmarksRevisionIds.entrySet()) {
            if (bookmark.getValue().startsWith(baseRevisionId)) {
                baseBookmarks.add(bookmark.getKey());
            }
        }

        Optional<String> diff = Optional
                .of(vcCmdLineInterface.diffBetweenRevisions(baseRevisionId, currentRevisionId));

        return SourceControlInfo.builder().setCurrentRevisionId(currentRevisionId)
                .setRevisionIdOffTracked(baseRevisionId).setBasedOffWhichTracked(baseBookmarks.build())
                .setDiff(diff).setDirtyFiles(changedFiles).build();
    }

    @Value.Immutable
    @BuckStyleImmutable
    interface AbstractSourceControlInfo {
        String getCurrentRevisionId();

        ImmutableSet<String> getBasedOffWhichTracked();

        Optional<String> getRevisionIdOffTracked();

        @JsonIgnore
        Optional<String> getDiff();

        ImmutableSet<String> getDirtyFiles();
    }
}