| // Copyright (C) 2019 The Android Open Source Project |
| // |
| // 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.googlesource.gerrit.plugins.analytics.common |
| |
| import com.google.common.cache.CacheLoader |
| import com.google.gerrit.extensions.api.projects.CommentLinkInfo |
| import com.google.gerrit.reviewdb.client.Project |
| import com.google.gerrit.server.git.GitRepositoryManager |
| import com.google.gerrit.server.project.ProjectCache |
| import com.google.inject.Inject |
| import com.googlesource.gerrit.plugins.analytics.{CommitInfo, IssueInfo} |
| import com.googlesource.gerrit.plugins.analytics.common.ManagedResource.use |
| import org.eclipse.jgit.diff.{DiffFormatter, RawTextComparator} |
| import org.eclipse.jgit.revwalk.RevWalk |
| import org.eclipse.jgit.treewalk.{CanonicalTreeParser, EmptyTreeIterator} |
| import org.eclipse.jgit.util.io.DisabledOutputStream |
| |
| import scala.collection.JavaConverters._ |
| import scala.util.matching.Regex |
| |
| class CommitsStatisticsLoader @Inject() (gitRepositoryManager: GitRepositoryManager, projectCache: ProjectCache, botLikeExtractor: BotLikeExtractor) extends CacheLoader[CommitsStatisticsCacheKey, CommitsStatistics] { |
| |
| override def load(cacheKey: CommitsStatisticsCacheKey): CommitsStatistics = { |
| import RevisionBrowsingSupport._ |
| |
| val objectId = cacheKey.commitId |
| val nameKey = new Project.NameKey(cacheKey.projectName) |
| val commentInfoList: Seq[CommentLinkInfo] = projectCache.get(nameKey).getCommentLinks.asScala |
| val replacers = commentInfoList.map(info => |
| Replacer( |
| info.`match`.r, |
| Option(info.link).getOrElse(info.html))) |
| |
| use(gitRepositoryManager.openRepository(nameKey)) { repo => |
| |
| // I can imagine this kind of statistics is already being available in Gerrit but couldn't understand how to access it |
| // which Injection can be useful for this task? |
| use(new RevWalk(repo)) { rw => |
| val reader = repo.newObjectReader() |
| val commit = rw.parseCommit(objectId) |
| val commitMessage = commit.getFullMessage |
| |
| val oldTree = { |
| // protects against initial commit |
| if (commit.getParentCount == 0) |
| new EmptyTreeIterator |
| else |
| new CanonicalTreeParser(null, reader, rw.parseCommit(commit.getParent(0).getId).getTree) |
| } |
| |
| val newTree = new CanonicalTreeParser(null, reader, commit.getTree) |
| |
| val df = new DiffFormatter(DisabledOutputStream.INSTANCE) |
| df.setRepository(repo) |
| df.setDiffComparator(RawTextComparator.DEFAULT) |
| df.setDetectRenames(true) |
| val diffs = df.scan(oldTree, newTree).asScala |
| |
| val lines = (for { |
| diff <- diffs |
| edit <- df.toFileHeader(diff).toEditList.asScala |
| } yield Lines(edit.getEndA - edit.getBeginA, edit.getEndB - edit.getBeginB)).fold(Lines(0, 0))(_ + _) |
| |
| val files: Set[String] = diffs.map(df.toFileHeader(_).getNewPath).toSet |
| |
| val commitInfo = CommitInfo(objectId.getName, commit.getAuthorIdent.getWhen.getTime, commit.isMerge, botLikeExtractor.isBotLike(files), files) |
| val commitsStats = CommitsStatistics(lines.added, lines.deleted, commitInfo.merge, commitInfo.botLike, List(commitInfo), extractIssues(commitMessage, replacers).toList) |
| |
| commitsStats |
| } |
| } |
| } |
| |
| private def extractIssues(commitMessage: String, replacers: Seq[Replacer]): Seq[IssueInfo] = |
| replacers.flatMap { |
| case Replacer(pattern, replaced) => |
| pattern.findAllIn(commitMessage) |
| .map(code => { |
| val transformed = pattern.replaceAllIn(code, replaced) |
| IssueInfo(code, transformed) |
| }) |
| } |
| |
| |
| |
| final private case class Replacer(pattern: Regex, replaced: String) |
| |
| final private case class Lines(deleted: Int, added: Int) { |
| def +(other: Lines) = Lines(deleted + other.deleted, added + other.added) |
| } |
| } |