com.google.gerrit.server.notedb.CommitRewriter Maven / Gradle / Ivy
// Copyright (C) 2021 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.google.gerrit.server.notedb;
import static com.google.common.base.MoreObjects.firstNonNull;
import static com.google.common.base.Preconditions.checkState;
import static com.google.gerrit.server.notedb.ChangeNoteUtil.FOOTER_ASSIGNEE;
import static com.google.gerrit.server.notedb.ChangeNoteUtil.FOOTER_ATTENTION;
import static com.google.gerrit.server.notedb.ChangeNoteUtil.FOOTER_LABEL;
import static com.google.gerrit.server.notedb.ChangeNoteUtil.FOOTER_REAL_USER;
import static com.google.gerrit.server.notedb.ChangeNoteUtil.FOOTER_SUBMITTED_WITH;
import static com.google.gerrit.server.notedb.ChangeNoteUtil.FOOTER_TAG;
import static com.google.gerrit.server.util.AccountTemplateUtil.ACCOUNT_TEMPLATE_PATTERN;
import static com.google.gerrit.server.util.AccountTemplateUtil.ACCOUNT_TEMPLATE_REGEX;
import com.google.auto.value.AutoValue;
import com.google.common.base.Splitter;
import com.google.common.base.Strings;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.common.flogger.FluentLogger;
import com.google.gerrit.common.Nullable;
import com.google.gerrit.common.UsedAt;
import com.google.gerrit.entities.Account;
import com.google.gerrit.entities.Change;
import com.google.gerrit.entities.HumanComment;
import com.google.gerrit.entities.PatchSetApproval;
import com.google.gerrit.entities.Project;
import com.google.gerrit.entities.RefNames;
import com.google.gerrit.entities.SubmitRecord;
import com.google.gerrit.git.RefUpdateUtil;
import com.google.gerrit.json.OutputFormat;
import com.google.gerrit.server.ChangeMessagesUtil;
import com.google.gerrit.server.account.AccountCache;
import com.google.gerrit.server.account.AccountState;
import com.google.gerrit.server.account.externalids.ExternalId;
import com.google.gerrit.server.notedb.ChangeNoteUtil.AttentionStatusInNoteDb;
import com.google.gerrit.server.notedb.ChangeNoteUtil.CommitMessageRange;
import com.google.gerrit.server.util.AccountTemplateUtil;
import com.google.gson.Gson;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.Serializable;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.apache.commons.lang3.StringUtils;
import org.eclipse.jgit.diff.DiffAlgorithm;
import org.eclipse.jgit.diff.DiffFormatter;
import org.eclipse.jgit.diff.EditList;
import org.eclipse.jgit.diff.HistogramDiff;
import org.eclipse.jgit.diff.RawText;
import org.eclipse.jgit.diff.RawTextComparator;
import org.eclipse.jgit.errors.ConfigInvalidException;
import org.eclipse.jgit.internal.storage.file.FileRepository;
import org.eclipse.jgit.internal.storage.file.PackInserter;
import org.eclipse.jgit.lib.BatchRefUpdate;
import org.eclipse.jgit.lib.CommitBuilder;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectInserter;
import org.eclipse.jgit.lib.PersonIdent;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.FooterLine;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevSort;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.transport.ReceiveCommand;
import org.eclipse.jgit.util.RawParseUtils;
/**
* Rewrites ('backfills') commit history of change in NoteDb to not contain user data. Only fixes
* known cases, rewriting commits case by case.
*
* The cases where we used to put user data in NoteDb can be found by
* https://gerrit-review.googlesource.com/q/hashtag:user-data-cleanup
*
*
As opposed to {@link NoteDbRewriter} implementations, which target a specific change and are
* used by REST endpoints, this rewriter is used as standalone tool, that bulk backfills changes by
* project.
*/
@UsedAt(UsedAt.Project.GOOGLE)
@Singleton
public class CommitRewriter {
/** Options to run {@link #backfillProject}. */
public static class RunOptions implements Serializable {
private static final long serialVersionUID = 1L;
/** Whether to rewrite the commit history or only find refs that need to be fixed. */
public boolean dryRun = true;
/**
* Whether to verify that resulting commits contain user data for the accounts that are linked
* to a change, see {@link #verifyCommit}, {@link #collectAccounts}.
*/
public boolean verifyCommits = true;
/** Whether to compute and output the diff of the commit history for the backfilled refs. */
public boolean outputDiff = true;
/** Max number of refs to update in a single {@link BatchRefUpdate}. */
public int maxRefsInBatch = 10000;
/**
* Max number of refs to fix by a single {@link RefsUpdate} run. Since the second run on the
* same set of refs is a no-op, running with this option in a loop will eventually fix all refs.
* The number of executed {@link BatchRefUpdate} depends on {@link #maxRefsInBatch} option.
*/
public int maxRefsToUpdate = 50000;
}
/** Result of the backfill run for a project. */
public static class BackfillResult {
/** If the run for the project was successful. */
public boolean ok;
/**
* Refs that were fixed by the run/ would be fixed if in --dry-run, together with their commit
* history diff. Diff is empty if --output-diff is false.
*/
public Map> fixedRefDiff = new HashMap<>();
/**
* Refs that still contain user data after the backfill run. Only filled if --verify-commits,
* see {@link #verifyCommit}
*/
public List refsStillInvalidAfterFix = new ArrayList<>();
/** Refs, failed to backfill by the run. */
public List refsFailedToFix = new ArrayList<>();
}
/** Diff result of a single commit rewrite */
@AutoValue
public abstract static class CommitDiff {
public static CommitDiff create(ObjectId oldSha1, String commitDiff) {
return new AutoValue_CommitRewriter_CommitDiff(oldSha1, commitDiff);
}
/** SHA1 of the overwritten commit */
public abstract ObjectId oldSha1();
/** Diff applied to the commit with {@link #oldSha1} */
public abstract String diff();
}
public static final String DEFAULT_ACCOUNT_REPLACEMENT = "Gerrit Account";
private static final Pattern NON_REPLACE_ACCOUNT_PATTERN =
Pattern.compile(DEFAULT_ACCOUNT_REPLACEMENT + "|" + ACCOUNT_TEMPLATE_REGEX);
private static final Pattern OK_ACCOUNT_NAME_PATTERN =
Pattern.compile("(?i:someone|someone else|anonymous)|" + ACCOUNT_TEMPLATE_REGEX);
/** Patterns to match change messages that need to be fixed. */
private static final Pattern ASSIGNEE_DELETED_PATTERN = Pattern.compile("Assignee deleted: (.*)");
private static final Pattern ASSIGNEE_ADDED_PATTERN = Pattern.compile("Assignee added: (.*)");
private static final Pattern ASSIGNEE_CHANGED_PATTERN =
Pattern.compile("Assignee changed from: (.*) to: (.*)");
private static final Pattern REMOVED_REVIEWER_PATTERN =
Pattern.compile(
"Removed (cc|reviewer) (.*)(\\.| with the following votes:\n.*)", Pattern.DOTALL);
private static final Pattern REMOVED_VOTE_PATTERN = Pattern.compile("Removed (.*) by (.*)");
private static final String REMOVED_VOTES_CHANGE_MESSAGE_START = "Removed the following votes:";
private static final Pattern REMOVED_VOTES_CHANGE_MESSAGE_PATTERN =
Pattern.compile("\\* (.*) by (.*)");
private static final Pattern REMOVED_CHANGE_MESSAGE_PATTERN =
Pattern.compile("Change message removed by: (.*)(\nReason: .*)?");
private static final Pattern SUBMITTED_PATTERN =
Pattern.compile("Change has been successfully (.*) by (.*)");
private static final Pattern ON_CODE_OWNER_ADD_REVIEWER_PATTERN =
Pattern.compile("(.*) who was added as reviewer owns the following files");
private static final String CODE_OWNER_ADD_REVIEWER_TAG =
ChangeMessagesUtil.AUTOGENERATED_BY_GERRIT_TAG_PREFIX + "code-owners:addReviewer";
private static final String ON_CODE_OWNER_APPROVAL_REGEX = "code-owner approved by (.*):";
private static final String ON_CODE_OWNER_OVERRIDE_REGEX =
"code-owners submit requirement .* overridden by (.*)";
private static final Pattern ON_CODE_OWNER_REVIEW_PATTERN =
Pattern.compile(ON_CODE_OWNER_APPROVAL_REGEX + "|" + ON_CODE_OWNER_OVERRIDE_REGEX);
private static final Pattern ON_CODE_OWNER_POST_REVIEW_PATTERN =
Pattern.compile("Patch Set [0-9]+:[\\s\\S]*By (voting|removing)[\\s\\S]*");
private static final Pattern REPLY_BY_REASON_PATTERN =
Pattern.compile("(.*) replied on the change");
private static final Pattern ADDED_BY_REASON_PATTERN =
Pattern.compile("Added by (.*) using the hovercard menu");
private static final Pattern REMOVED_BY_REASON_PATTERN =
Pattern.compile("Removed by (.*) using the hovercard menu");
private static final Pattern REMOVED_BY_ICON_CLICK_REASON_PATTERN =
Pattern.compile("Removed by (.*) by clicking the attention icon");
/** Matches {@link Account#getNameEmail} */
private static final Pattern NAME_EMAIL_PATTERN = Pattern.compile("(.*) (\\<.*\\>|\\(.*\\))");
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
private static final Splitter COMMIT_MESSAGE_SPLITTER = Splitter.onPattern("\\r?\\n");
private final ChangeNotes.Factory changeNotesFactory;
private final AccountCache accountCache;
private final DiffAlgorithm diffAlgorithm = new HistogramDiff();
private static final Gson gson = OutputFormat.JSON_COMPACT.newGson();
@Inject
CommitRewriter(ChangeNotes.Factory changeNotesFactory, AccountCache accountCache) {
this.changeNotesFactory = changeNotesFactory;
this.accountCache = accountCache;
}
/**
* Rewrites commit history of {@link RefNames#changeMetaRef}s in single {@code repo}. Only
* rewrites branch if necessary, i.e. if there were any commits that contained user data.
*
* See {@link RunOptions} for the execution and output options.
*
* @param project project to backfill
* @param repo repo to backfill
* @param options {@link RunOptions} to control how the run is executed.
* @return BackfillResult
*/
public BackfillResult backfillProject(
Project.NameKey project, Repository repo, RunOptions options) {
checkState(
options.maxRefsInBatch > 0 && options.maxRefsToUpdate > 0,
"Expected maxRefsInBatch>0 && <= maxRefsToUpdate>0");
checkState(
options.maxRefsInBatch <= options.maxRefsToUpdate,
"Expected maxRefsInBatch(%s) <= maxRefsToUpdate(%s)",
options.maxRefsInBatch,
options.maxRefsToUpdate);
BackfillResult result = new BackfillResult();
result.ok = true;
int refsInUpdate = 0;
@SuppressWarnings("resource")
RefsUpdate refsUpdate = null;
try {
for (Ref ref : repo.getRefDatabase().getRefsByPrefix(RefNames.REFS_CHANGES)) {
if (result.fixedRefDiff.size() >= options.maxRefsToUpdate) {
return result;
}
Change.Id changeId = Change.Id.fromRef(ref.getName());
if (changeId == null || !ref.getName().equals(RefNames.changeMetaRef(changeId))) {
continue;
}
try {
ImmutableSet accountsInChange = ImmutableSet.of();
if (options.verifyCommits) {
try {
ChangeNotes changeNotes = changeNotesFactory.create(project, changeId);
accountsInChange = collectAccounts(changeNotes);
} catch (Exception e) {
logger.atWarning().withCause(e).log("Failed to run verification on ref %s", ref);
}
}
if (refsUpdate == null) {
refsUpdate = RefsUpdate.create(repo);
}
ChangeFixProgress changeFixProgress =
backfillChange(refsUpdate, ref, accountsInChange, options);
if (changeFixProgress.anyFixesApplied) {
refsInUpdate++;
refsUpdate
.batchRefUpdate()
.addCommand(
new ReceiveCommand(
ref.getObjectId(), changeFixProgress.newTipId, ref.getName()));
result.fixedRefDiff.put(ref.getName(), changeFixProgress.commitDiffs);
}
if (refsInUpdate >= options.maxRefsInBatch
|| result.fixedRefDiff.size() >= options.maxRefsToUpdate) {
processUpdate(options, refsUpdate);
refsUpdate = null;
refsInUpdate = 0;
}
if (!changeFixProgress.isValidAfterFix) {
result.refsStillInvalidAfterFix.add(ref.getName());
}
} catch (Exception e) {
logger.atWarning().withCause(e).log("Failed to fix ref %s", ref);
result.refsFailedToFix.add(ref.getName());
}
}
processUpdate(options, refsUpdate);
} catch (IOException e) {
logger.atWarning().log("Failed to fix project %s. Reason: %s", project.get(), e.getMessage());
result.ok = false;
} finally {
if (refsUpdate != null) {
refsUpdate.close();
}
}
return result;
}
/** Executes a single {@link RefsUpdate#batchRefUpdate}. */
private void processUpdate(RunOptions options, @Nullable RefsUpdate refsUpdate)
throws IOException {
if (refsUpdate == null) {
return;
}
if (!refsUpdate.batchRefUpdate().getCommands().isEmpty()) {
if (!options.dryRun) {
refsUpdate.inserter().flush();
RefUpdateUtil.executeChecked(refsUpdate.batchRefUpdate(), refsUpdate.revWalk());
}
}
refsUpdate.close();
}
/**
* Retrieves accounts, that are associated with a change (e.g. reviewers, commenters, etc.). These
* accounts are used to verify that commits do not contain user data. See {@link #verifyCommit}
*
* @param changeNotes {@link ChangeNotes} of the change to retrieve associated accounts from.
* @return {@link AccountState} of accounts, that are associated with the change.
*/
private ImmutableSet collectAccounts(ChangeNotes changeNotes) {
Set accounts = new HashSet<>();
accounts.add(changeNotes.getChange().getOwner());
for (PatchSetApproval patchSetApproval : changeNotes.getApprovals().values()) {
if (patchSetApproval.accountId() != null) {
accounts.add(patchSetApproval.accountId());
}
if (patchSetApproval.realAccountId() != null) {
accounts.add(patchSetApproval.realAccountId());
}
}
accounts.addAll(changeNotes.getAllPastReviewers());
accounts.addAll(changeNotes.getPastAssignees());
changeNotes
.getAttentionSetUpdates()
.forEach(attentionSetUpdate -> accounts.add(attentionSetUpdate.account()));
for (SubmitRecord submitRecord : changeNotes.getSubmitRecords()) {
if (submitRecord.labels != null) {
accounts.addAll(
submitRecord.labels.stream()
.map(label -> label.appliedBy)
.filter(Objects::nonNull)
.collect(Collectors.toSet()));
}
}
for (HumanComment comment : changeNotes.getHumanComments().values()) {
if (comment.author != null) {
accounts.add(comment.author.getId());
}
if (comment.getRealAuthor() != null) {
accounts.add(comment.getRealAuthor().getId());
}
}
return ImmutableSet.copyOf(accountCache.get(accounts).values());
}
/** Verifies that the commit does not contain user data of accounts in {@code accounts}. */
private boolean verifyCommit(
String commitMessage, PersonIdent author, Collection accounts) {
for (AccountState accountState : accounts) {
Account account = accountState.account();
if (commitMessage.contains(account.getName())) {
return false;
}
if (account.fullName() != null && commitMessage.contains(account.fullName())) {
return false;
}
if (account.displayName() != null && commitMessage.contains(account.displayName())) {
return false;
}
if (account.preferredEmail() != null && commitMessage.contains(account.preferredEmail())) {
return false;
}
if (accountState.userName().isPresent()
&& commitMessage.contains(accountState.userName().get())) {
return false;
}
Stream allEmails =
accountState.externalIds().stream().map(ExternalId::email).filter(Objects::nonNull);
if (allEmails.anyMatch(email -> commitMessage.contains(email))) {
return false;
}
if (author.toString().contains(account.getName())) {
return false;
}
}
return true;
}
/**
* Walks the ref history from oldest update to the most recent update, fixing the commits that
* contain user data case by case. Commit history is rewritten from the first commit, that needs
* to be updated, for all subsequent updates. The new ref tip is returned in {@link
* ChangeFixProgress#newTipId}.
*/
public ChangeFixProgress backfillChange(
RefsUpdate refsUpdate,
Ref ref,
ImmutableSet accountsInChange,
RunOptions options)
throws IOException, ConfigInvalidException {
ObjectId oldTip = ref.getObjectId();
// Walk from the first commit of the branch.
refsUpdate.revWalk().reset();
refsUpdate.revWalk().markStart(refsUpdate.revWalk().parseCommit(oldTip));
refsUpdate.revWalk().sort(RevSort.TOPO);
refsUpdate.revWalk().sort(RevSort.REVERSE);
RevCommit originalCommit;
boolean rewriteStarted = false;
ChangeFixProgress changeFixProgress = new ChangeFixProgress(ref.getName());
while ((originalCommit = refsUpdate.revWalk().next()) != null) {
changeFixProgress.updateAuthorId =
parseIdent(changeFixProgress, originalCommit.getAuthorIdent());
PersonIdent fixedAuthorIdent;
if (changeFixProgress.updateAuthorId.isPresent()) {
fixedAuthorIdent =
getFixedIdent(originalCommit.getAuthorIdent(), changeFixProgress.updateAuthorId.get());
} else {
// Field to parse id from ident. Update by gerrit server or an old/broken change.
// Leave as it is.
fixedAuthorIdent = originalCommit.getAuthorIdent();
}
Optional fixedCommitMessage = fixedCommitMessage(originalCommit, changeFixProgress);
String commitMessage =
fixedCommitMessage.isPresent()
? fixedCommitMessage.get()
: originalCommit.getFullMessage();
if (options.verifyCommits) {
boolean isCommitValid = verifyCommit(commitMessage, fixedAuthorIdent, accountsInChange);
changeFixProgress.isValidAfterFix &= isCommitValid;
if (!isCommitValid) {
StringBuilder detailedVerificationStatus =
new StringBuilder(
String.format(
"Commit %s of ref %s failed verification after fix",
originalCommit.getId(), ref));
detailedVerificationStatus.append("\nCommit body:\n");
detailedVerificationStatus.append(commitMessage);
if (fixedCommitMessage.isPresent()) {
detailedVerificationStatus.append("\n was fixed.\n");
}
detailedVerificationStatus.append("Commit author:\n");
detailedVerificationStatus.append(fixedAuthorIdent.toString());
logger.atWarning().log("%s", detailedVerificationStatus);
}
}
boolean needsFix =
!fixedAuthorIdent.equals(originalCommit.getAuthorIdent())
|| fixedCommitMessage.isPresent();
if (!rewriteStarted && !needsFix) {
changeFixProgress.newTipId = originalCommit;
continue;
}
rewriteStarted = true;
changeFixProgress.anyFixesApplied = true;
CommitBuilder cb = new CommitBuilder();
if (changeFixProgress.newTipId != null) {
cb.setParentId(changeFixProgress.newTipId);
}
cb.setTreeId(originalCommit.getTree());
cb.setMessage(commitMessage);
cb.setAuthor(fixedAuthorIdent);
cb.setCommitter(originalCommit.getCommitterIdent());
cb.setEncoding(originalCommit.getEncoding());
byte[] newCommitContent = cb.build();
checkCommitModification(originalCommit, newCommitContent);
changeFixProgress.newTipId =
refsUpdate.inserter().insert(Constants.OBJ_COMMIT, newCommitContent);
// Only compute diff if the content of the commit was actually changed.
if (options.outputDiff && needsFix) {
String diff = computeDiff(originalCommit.getRawBuffer(), newCommitContent);
checkState(
!Strings.isNullOrEmpty(diff),
"Expected diff for commit %s of ref %s",
originalCommit.getId(),
ref.getName());
changeFixProgress.commitDiffs.add(CommitDiff.create(originalCommit.getId(), diff));
} else if (needsFix) {
// Always output old commits SHA1
changeFixProgress.commitDiffs.add(CommitDiff.create(originalCommit.getId(), ""));
}
}
return changeFixProgress;
}
/**
* In NoteDb, all the meta information is stored in footer lines. If we accidentally drop some of
* the footer lines, the original meta information will be lost, and the change might become
* unparsable.
*
* While we can not verify the entire commit content, we at least make sure that the resulting
* commit has the same author, committer and footer lines are in the same order and contain same
* footer keys as the original commit.
*
*
Commit message and footer values might have been rewritten.
*/
private void checkCommitModification(RevCommit originalCommit, byte[] newCommitContent)
throws IOException {
RevCommit newCommit = RevCommit.parse(newCommitContent);
PersonIdent newAuthorIdent = newCommit.getAuthorIdent();
PersonIdent originalAuthorIdent = originalCommit.getAuthorIdent();
// The new commit must have same author and committer ident as the original commit.
if (!verifyPersonIdent(newAuthorIdent, originalAuthorIdent)) {
throw new IllegalStateException(
String.format(
"New author %s does not match original author %s",
newAuthorIdent.toExternalString(), originalAuthorIdent.toExternalString()));
}
PersonIdent newCommitterIdent = newCommit.getCommitterIdent();
PersonIdent originalCommitterIdent = originalCommit.getCommitterIdent();
if (!verifyPersonIdent(newCommitterIdent, originalCommitterIdent)) {
throw new IllegalStateException(
String.format(
"New committer %s does not match original committer %s",
newCommitterIdent.toExternalString(), originalCommitterIdent.toExternalString()));
}
List newFooterLines = newCommit.getFooterLines();
List originalFooterLines = originalCommit.getFooterLines();
// Number and order of footer lines must remain the same, the value may have changed.
if (newFooterLines.size() != originalFooterLines.size()) {
String diff = computeDiff(originalCommit.getRawBuffer(), newCommitContent);
throw new IllegalStateException(
String.format(
"Expected footer lines in new commit to match original footer lines. Diff %s", diff));
}
for (int i = 0; i < newFooterLines.size(); i++) {
FooterLine newFooterLine = newFooterLines.get(i);
FooterLine originalFooterLine = originalFooterLines.get(i);
if (!newFooterLine.getKey().equals(originalFooterLine.getKey())) {
String diff = computeDiff(originalCommit.getRawBuffer(), newCommitContent);
throw new IllegalStateException(
String.format(
"Expected footer lines in new commit to match original footer lines. Diff %s",
diff));
}
}
}
// TODO(issue-15517): Fix the JdkObsolete issue with Date once JGit's PersonIdent class supports
// Instants
@SuppressWarnings("JdkObsolete")
private boolean verifyPersonIdent(PersonIdent newIdent, PersonIdent originalIdent) {
return newIdent.getTimeZoneOffset() == originalIdent.getTimeZoneOffset()
&& newIdent.getWhen().getTime() == originalIdent.getWhen().getTime()
&& newIdent.getEmailAddress().equals(originalIdent.getEmailAddress());
}
private Optional fixAssigneeChangeMessage(
ChangeFixProgress changeFixProgress,
Optional oldAssignee,
Optional newAssignee,
String originalChangeMessage) {
if (Strings.isNullOrEmpty(originalChangeMessage)) {
return Optional.empty();
}
Matcher assigneeDeletedMatcher = ASSIGNEE_DELETED_PATTERN.matcher(originalChangeMessage);
if (assigneeDeletedMatcher.matches()) {
if (!NON_REPLACE_ACCOUNT_PATTERN.matcher(assigneeDeletedMatcher.group(1)).matches()) {
Optional assigneeReplacement =
getPossibleAccountReplacement(
changeFixProgress,
oldAssignee,
getAccountInfoFromNameEmail(assigneeDeletedMatcher.group(1)));
return Optional.of(
assigneeReplacement.isPresent()
? "Assignee deleted: " + assigneeReplacement.get()
: "Assignee was deleted.");
}
return Optional.empty();
}
Matcher assigneeAddedMatcher = ASSIGNEE_ADDED_PATTERN.matcher(originalChangeMessage);
if (assigneeAddedMatcher.matches()) {
if (!NON_REPLACE_ACCOUNT_PATTERN.matcher(assigneeAddedMatcher.group(1)).matches()) {
Optional assigneeReplacement =
getPossibleAccountReplacement(
changeFixProgress,
newAssignee,
getAccountInfoFromNameEmail(assigneeAddedMatcher.group(1)));
return Optional.of(
assigneeReplacement.isPresent()
? "Assignee added: " + assigneeReplacement.get()
: "Assignee was added.");
}
return Optional.empty();
}
Matcher assigneeChangedMatcher = ASSIGNEE_CHANGED_PATTERN.matcher(originalChangeMessage);
if (assigneeChangedMatcher.matches()) {
if (!NON_REPLACE_ACCOUNT_PATTERN.matcher(assigneeChangedMatcher.group(1)).matches()) {
Optional oldAssigneeReplacement =
getPossibleAccountReplacement(
changeFixProgress,
oldAssignee,
getAccountInfoFromNameEmail(assigneeChangedMatcher.group(1)));
Optional newAssigneeReplacement =
getPossibleAccountReplacement(
changeFixProgress,
newAssignee,
getAccountInfoFromNameEmail(assigneeChangedMatcher.group(2)));
return Optional.of(
oldAssigneeReplacement.isPresent() && newAssigneeReplacement.isPresent()
? String.format(
"Assignee changed from: %s to: %s",
oldAssigneeReplacement.get(), newAssigneeReplacement.get())
: "Assignee was changed.");
}
return Optional.empty();
}
return Optional.empty();
}
private Optional fixReviewerChangeMessage(String originalChangeMessage) {
if (Strings.isNullOrEmpty(originalChangeMessage)) {
return Optional.empty();
}
Matcher matcher = REMOVED_REVIEWER_PATTERN.matcher(originalChangeMessage);
if (matcher.matches() && !ACCOUNT_TEMPLATE_PATTERN.matcher(matcher.group(2)).matches()) {
// Since we do not use change messages for reviewer updates on UI, it does not matter what we
// rewrite it to.
return Optional.of(originalChangeMessage.substring(0, matcher.end(1)));
}
return Optional.empty();
}
private Optional fixRemoveVoteChangeMessage(
ChangeFixProgress changeFixProgress,
Optional reviewer,
String originalChangeMessage) {
if (Strings.isNullOrEmpty(originalChangeMessage)) {
return Optional.empty();
}
Matcher matcher = REMOVED_VOTE_PATTERN.matcher(originalChangeMessage);
if (matcher.matches() && !NON_REPLACE_ACCOUNT_PATTERN.matcher(matcher.group(2)).matches()) {
Optional reviewerReplacement =
getPossibleAccountReplacement(
changeFixProgress, reviewer, getAccountInfoFromNameEmail(matcher.group(2)));
StringBuilder replacement = new StringBuilder();
replacement.append("Removed ").append(matcher.group(1));
if (reviewerReplacement.isPresent()) {
replacement.append(" by ").append(reviewerReplacement.get());
}
return Optional.of(replacement.toString());
}
return Optional.empty();
}
private Optional fixRemoveVotesChangeMessage(
ChangeFixProgress changeFixProgress, String originalChangeMessage) {
if (Strings.isNullOrEmpty(originalChangeMessage)
|| !originalChangeMessage.startsWith(REMOVED_VOTES_CHANGE_MESSAGE_START)) {
return Optional.empty();
}
List lines = COMMIT_MESSAGE_SPLITTER.splitToList(originalChangeMessage);
StringBuilder fixedLines = new StringBuilder();
boolean anyFixed = false;
for (int i = 1; i < lines.size(); i++) {
String line = lines.get(i);
if (line.isEmpty()) {
continue;
}
Matcher matcher = REMOVED_VOTES_CHANGE_MESSAGE_PATTERN.matcher(line);
String replacementLine = line;
if (matcher.matches() && !NON_REPLACE_ACCOUNT_PATTERN.matcher(matcher.group(2)).matches()) {
anyFixed = true;
Optional reviewerReplacement =
getPossibleAccountReplacement(
changeFixProgress, Optional.empty(), getAccountInfoFromNameEmail(matcher.group(2)));
replacementLine = "* " + matcher.group(1);
if (reviewerReplacement.isPresent()) {
replacementLine += " by " + reviewerReplacement.get();
}
replacementLine += "\n";
}
fixedLines.append(replacementLine);
}
if (!anyFixed) {
return Optional.empty();
}
return Optional.of(REMOVED_VOTES_CHANGE_MESSAGE_START + "\n" + fixedLines);
}
private Optional fixDeleteChangeMessageCommitMessage(String originalChangeMessage) {
if (Strings.isNullOrEmpty(originalChangeMessage)) {
return Optional.empty();
}
Matcher matcher = REMOVED_CHANGE_MESSAGE_PATTERN.matcher(originalChangeMessage);
if (matcher.matches() && !ACCOUNT_TEMPLATE_PATTERN.matcher(matcher.group(1)).matches()) {
String fixedMessage = "Change message removed";
if (matcher.group(2) != null) {
fixedMessage += matcher.group(2);
}
return Optional.of(fixedMessage);
}
return Optional.empty();
}
private Optional fixSubmitChangeMessage(String originalChangeMessage) {
if (Strings.isNullOrEmpty(originalChangeMessage)) {
return Optional.empty();
}
Matcher matcher = SUBMITTED_PATTERN.matcher(originalChangeMessage);
if (matcher.matches()) {
// See https://gerrit-review.googlesource.com/c/gerrit/+/272654
return Optional.of(originalChangeMessage.substring(0, matcher.end(1)));
}
return Optional.empty();
}
/**
* Rewrites a code owners change message.
*
* See https://gerrit-review.googlesource.com/c/plugins/code-owners/+/305409
*/
private Optional fixCodeOwnersOnAddReviewerChangeMessage(
ChangeFixProgress changeFixProgress, String originalMessage) {
if (Strings.isNullOrEmpty(originalMessage)) {
return Optional.empty();
}
Matcher onAddReviewerMatcher = ON_CODE_OWNER_ADD_REVIEWER_PATTERN.matcher(originalMessage);
if (!onAddReviewerMatcher.find()
|| NON_REPLACE_ACCOUNT_PATTERN
.matcher(normalizeOnCodeOwnerAddReviewerMatch(onAddReviewerMatcher.group(1)))
.matches()) {
return Optional.empty();
}
// Pre fix, try to replace with something meaningful.
// Retrieve reviewer accounts from cache and try to match by their name.
onAddReviewerMatcher.reset();
StringBuilder sb = new StringBuilder();
while (onAddReviewerMatcher.find()) {
String reviewerName = normalizeOnCodeOwnerAddReviewerMatch(onAddReviewerMatcher.group(1));
Optional replacementName =
getPossibleAccountReplacement(
changeFixProgress, Optional.empty(), ParsedAccountInfo.create(reviewerName));
onAddReviewerMatcher.appendReplacement(
sb,
replacementName.isPresent()
? replacementName.get() + ", who was added as reviewer owns the following files"
: "Added reviewer owns the following files");
}
onAddReviewerMatcher.appendTail(sb);
sb.append("\n");
return Optional.of(sb.toString());
}
/**
* See {@link #ON_CODE_OWNER_ADD_REVIEWER_PATTERN}.
*
* Some of the messages have format '{@link AccountTemplateUtil#ACCOUNT_TEMPLATE}, who...',
* while others '{@link AccountTemplateUtil#ACCOUNT_TEMPLATE} who...'.
*
*
Cut the trailing ',' from the match, so that valid patterns are not replaced.
*/
private static String normalizeOnCodeOwnerAddReviewerMatch(String reviewerMatch) {
String reviewerName = reviewerMatch;
if (reviewerName.charAt(reviewerName.length() - 1) == ',') {
reviewerName = reviewerName.substring(0, reviewerName.length() - 1);
}
return reviewerName;
}
private Optional fixCodeOwnersOnReviewChangeMessage(
Optional reviewer, String originalMessage) {
if (Strings.isNullOrEmpty(originalMessage)) {
return Optional.empty();
}
Matcher onCodeOwnerPostReviewMatcher =
ON_CODE_OWNER_POST_REVIEW_PATTERN.matcher(originalMessage);
if (!onCodeOwnerPostReviewMatcher.matches()) {
return Optional.empty();
}
Matcher onCodeOwnerReviewMatcher = ON_CODE_OWNER_REVIEW_PATTERN.matcher(originalMessage);
while (onCodeOwnerReviewMatcher.find()) {
String accountName =
firstNonNull(onCodeOwnerReviewMatcher.group(1), onCodeOwnerReviewMatcher.group(2));
if (!ACCOUNT_TEMPLATE_PATTERN.matcher(accountName).matches()) {
return Optional.of(
originalMessage.replace(
"by " + accountName,
"by "
+ reviewer
.map(AccountTemplateUtil::getAccountTemplate)
.orElse(DEFAULT_ACCOUNT_REPLACEMENT))
+ "\n");
}
}
return Optional.empty();
}
private Optional fixAttentionSetReason(String originalReason) {
if (Strings.isNullOrEmpty(originalReason)) {
return Optional.empty();
}
// Only the latest attention set updates are displayed on UI. As long as reason is
// human-readable, it does not matter what we rewrite it to.
Matcher replyByReasonMatcher = REPLY_BY_REASON_PATTERN.matcher(originalReason);
if (replyByReasonMatcher.matches()
&& !OK_ACCOUNT_NAME_PATTERN.matcher(replyByReasonMatcher.group(1)).matches()) {
return Optional.of("Someone replied on the change");
}
Matcher addedByReasonMatcher = ADDED_BY_REASON_PATTERN.matcher(originalReason);
if (addedByReasonMatcher.matches()
&& !OK_ACCOUNT_NAME_PATTERN.matcher(addedByReasonMatcher.group(1)).matches()) {
return Optional.of("Added by someone using the hovercard menu");
}
Matcher removedByReasonMatcher = REMOVED_BY_REASON_PATTERN.matcher(originalReason);
if (removedByReasonMatcher.matches()
&& !OK_ACCOUNT_NAME_PATTERN.matcher(removedByReasonMatcher.group(1)).matches()) {
return Optional.of("Removed by someone using the hovercard menu");
}
Matcher removedByIconClickReasonMatcher =
REMOVED_BY_ICON_CLICK_REASON_PATTERN.matcher(originalReason);
if (removedByIconClickReasonMatcher.matches()
&& !OK_ACCOUNT_NAME_PATTERN.matcher(removedByIconClickReasonMatcher.group(1)).matches()) {
return Optional.of("Removed by someone by clicking the attention icon");
}
return Optional.empty();
}
/**
* Fixes commit body case by case, so it does not contain user data. Returns fixed commit message,
* or {@link Optional#empty} if no fixes were applied.
*/
private Optional fixedCommitMessage(RevCommit revCommit, ChangeFixProgress fixProgress)
throws ConfigInvalidException {
byte[] raw = revCommit.getRawBuffer();
Charset enc = RawParseUtils.parseEncoding(raw);
Optional commitMessageRange =
ChangeNoteUtil.parseCommitMessageRange(revCommit);
if (!commitMessageRange.isPresent()) {
throw new ConfigInvalidException("Failed to parse commit message " + revCommit.getName());
}
String changeSubject =
RawParseUtils.decode(
enc,
raw,
commitMessageRange.get().subjectStart(),
commitMessageRange.get().subjectEnd());
Optional fixedChangeMessage = Optional.empty();
String originalChangeMessage = null;
if (commitMessageRange.isPresent() && commitMessageRange.get().hasChangeMessage()) {
originalChangeMessage =
RawParseUtils.decode(
enc,
raw,
commitMessageRange.get().changeMessageStart(),
commitMessageRange.get().changeMessageEnd() + 1)
.trim();
}
List footerLines = revCommit.getFooterLines();
StringBuilder footerLinesBuilder = new StringBuilder();
boolean anyFootersFixed = false;
for (FooterLine fl : footerLines) {
String footerKey = fl.getKey();
String footerValue = fl.getValue();
if (footerKey.equalsIgnoreCase(FOOTER_TAG.getName())) {
fixProgress.tag = footerValue;
} else if (footerKey.equalsIgnoreCase(FOOTER_ASSIGNEE.getName())) {
Account.Id oldAssignee = fixProgress.assigneeId;
FixIdentResult fixedAssignee = null;
if (footerValue.equals("")) {
fixProgress.assigneeId = null;
} else {
fixedAssignee = getFixedIdentString(fixProgress, footerValue);
fixProgress.assigneeId = fixedAssignee.accountId;
}
if (!fixedChangeMessage.isPresent()) {
fixedChangeMessage =
fixAssigneeChangeMessage(
fixProgress,
Optional.ofNullable(oldAssignee),
Optional.ofNullable(fixProgress.assigneeId),
originalChangeMessage);
}
if (fixedAssignee != null && fixedAssignee.fixedIdentString.isPresent()) {
addFooter(footerLinesBuilder, footerKey, fixedAssignee.fixedIdentString.get());
anyFootersFixed = true;
continue;
}
} else if (Arrays.stream(ReviewerStateInternal.values())
.anyMatch(state -> footerKey.equalsIgnoreCase(state.getFooterKey().getName()))) {
if (!fixedChangeMessage.isPresent()) {
fixedChangeMessage = fixReviewerChangeMessage(originalChangeMessage);
}
FixIdentResult fixedReviewer = getFixedIdentString(fixProgress, footerValue);
if (fixedReviewer.fixedIdentString.isPresent()) {
addFooter(footerLinesBuilder, footerKey, fixedReviewer.fixedIdentString.get());
anyFootersFixed = true;
continue;
}
} else if (footerKey.equalsIgnoreCase(FOOTER_REAL_USER.getName())) {
FixIdentResult fixedRealUser = getFixedIdentString(fixProgress, footerValue);
if (fixedRealUser.fixedIdentString.isPresent()) {
addFooter(footerLinesBuilder, footerKey, fixedRealUser.fixedIdentString.get());
anyFootersFixed = true;
continue;
}
} else if (footerKey.equalsIgnoreCase(FOOTER_LABEL.getName())) {
int uuidStart = footerValue.indexOf(", ");
int voterIdentStart = footerValue.indexOf(' ', uuidStart != -1 ? uuidStart + 2 : 0);
FixIdentResult fixedVoter = null;
if (voterIdentStart > 0) {
String originalIdentString = footerValue.substring(voterIdentStart + 1);
fixedVoter = getFixedIdentString(fixProgress, originalIdentString);
}
if (!fixedChangeMessage.isPresent()) {
fixedChangeMessage =
fixRemoveVoteChangeMessage(
fixProgress,
fixedVoter == null
? fixProgress.updateAuthorId
: Optional.of(fixedVoter.accountId),
originalChangeMessage);
}
if (fixedVoter != null && fixedVoter.fixedIdentString.isPresent()) {
String fixedLabelVote =
footerValue.substring(0, voterIdentStart) + " " + fixedVoter.fixedIdentString.get();
addFooter(footerLinesBuilder, footerKey, fixedLabelVote);
anyFootersFixed = true;
continue;
}
} else if (footerKey.equalsIgnoreCase(FOOTER_SUBMITTED_WITH.getName())) {
// Record format:
// Submitted-with: OK
// Submitted-with: OK: Code-Review: User Name
int voterIdentStart = StringUtils.ordinalIndexOf(footerValue, ": ", 2);
if (voterIdentStart >= 0) {
String originalIdentString = footerValue.substring(voterIdentStart + 2);
FixIdentResult fixedVoter = getFixedIdentString(fixProgress, originalIdentString);
if (fixedVoter.fixedIdentString.isPresent()) {
String fixedLabelVote =
footerValue.substring(0, voterIdentStart)
+ ": "
+ fixedVoter.fixedIdentString.get();
addFooter(footerLinesBuilder, footerKey, fixedLabelVote);
anyFootersFixed = true;
continue;
}
}
} else if (footerKey.equalsIgnoreCase(FOOTER_ATTENTION.getName())) {
AttentionStatusInNoteDb originalAttentionSetUpdate =
gson.fromJson(footerValue, AttentionStatusInNoteDb.class);
FixIdentResult fixedAttentionAccount =
getFixedIdentString(fixProgress, originalAttentionSetUpdate.personIdent);
Optional fixedReason = fixAttentionSetReason(originalAttentionSetUpdate.reason);
if (fixedAttentionAccount.fixedIdentString.isPresent() || fixedReason.isPresent()) {
AttentionStatusInNoteDb fixedAttentionSetUpdate =
new AttentionStatusInNoteDb(
fixedAttentionAccount.fixedIdentString.isPresent()
? fixedAttentionAccount.fixedIdentString.get()
: originalAttentionSetUpdate.personIdent,
originalAttentionSetUpdate.operation,
fixedReason.isPresent() ? fixedReason.get() : originalAttentionSetUpdate.reason);
addFooter(footerLinesBuilder, footerKey, gson.toJson(fixedAttentionSetUpdate));
anyFootersFixed = true;
continue;
}
}
addFooter(footerLinesBuilder, footerKey, footerValue);
}
// Some of the old commits are missing corresponding footers but still have change messages that
// need the fix. For such cases, try to guess or replace with the default string (see
// getPossibleAccountReplacement)
if (!fixedChangeMessage.isPresent()) {
fixedChangeMessage = fixReviewerChangeMessage(originalChangeMessage);
}
if (!fixedChangeMessage.isPresent()) {
fixedChangeMessage = fixRemoveVotesChangeMessage(fixProgress, originalChangeMessage);
}
if (!fixedChangeMessage.isPresent()) {
fixedChangeMessage =
fixRemoveVoteChangeMessage(fixProgress, Optional.empty(), originalChangeMessage);
}
if (!fixedChangeMessage.isPresent()) {
fixedChangeMessage =
fixAssigneeChangeMessage(
fixProgress, Optional.empty(), Optional.empty(), originalChangeMessage);
}
if (!fixedChangeMessage.isPresent()) {
fixedChangeMessage = fixSubmitChangeMessage(originalChangeMessage);
}
if (!fixedChangeMessage.isPresent()) {
fixedChangeMessage = fixDeleteChangeMessageCommitMessage(originalChangeMessage);
}
if (!fixedChangeMessage.isPresent()) {
fixedChangeMessage =
fixCodeOwnersOnReviewChangeMessage(fixProgress.updateAuthorId, originalChangeMessage);
}
if (!fixedChangeMessage.isPresent()
&& Objects.equals(fixProgress.tag, CODE_OWNER_ADD_REVIEWER_TAG)) {
fixedChangeMessage =
fixCodeOwnersOnAddReviewerChangeMessage(fixProgress, originalChangeMessage);
}
if (!anyFootersFixed && !fixedChangeMessage.isPresent()) {
return Optional.empty();
}
StringBuilder fixedCommitBuilder = new StringBuilder();
fixedCommitBuilder.append(changeSubject);
fixedCommitBuilder.append("\n\n");
if (commitMessageRange.get().hasChangeMessage()) {
fixedCommitBuilder.append(fixedChangeMessage.orElse(originalChangeMessage));
fixedCommitBuilder.append("\n\n");
}
fixedCommitBuilder.append(footerLinesBuilder);
return Optional.of(fixedCommitBuilder.toString());
}
private static StringBuilder addFooter(StringBuilder sb, String footer, String value) {
if (value == null) {
return sb;
}
sb.append(footer).append(":");
sb.append(" ").append(value);
sb.append('\n');
return sb;
}
private Optional parseIdent(ChangeFixProgress changeFixProgress, PersonIdent ident) {
Optional account = NoteDbUtil.parseIdent(ident);
if (account.isPresent()) {
changeFixProgress.parsedAccounts.putIfAbsent(account.get(), Optional.empty());
} else {
logger.atWarning().log(
"Fixing ref %s, failed to parse id %s", changeFixProgress.changeMetaRef, ident);
}
return account;
}
/**
* Fixes {@code originalIdent} so it does not contain user data, see {@link
* ChangeNoteUtil#getAccountIdAsUsername}.
*/
private PersonIdent getFixedIdent(PersonIdent originalIdent, Account.Id identAccount) {
return new PersonIdent(
ChangeNoteUtil.getAccountIdAsUsername(identAccount),
originalIdent.getEmailAddress(),
originalIdent.getWhen(),
originalIdent.getTimeZone());
}
/**
* Parses {@code originalIdentString} and applies the fix, so it does not contain user data, see
* {@link ChangeNoteUtil#appendAccountIdIdentString}.
*
* @param changeFixProgress see {@link ChangeFixProgress}
* @param originalIdentString ident to apply the fix to.
* @return {@link FixIdentResult}, with {@link FixIdentResult#accountId} parsed from {@code
* originalIdentString} and {@link FixIdentResult#fixedIdentString} if the fix was applied.
* @throws ConfigInvalidException if could not parse {@link FixIdentResult#accountId} from {@code
* originalIdentString}
*/
private FixIdentResult getFixedIdentString(
ChangeFixProgress changeFixProgress, String originalIdentString)
throws ConfigInvalidException {
FixIdentResult fixIdentResult = new FixIdentResult();
PersonIdent originalIdent = RawParseUtils.parsePersonIdent(originalIdentString);
// Ident as String is saved in NoteDB footers, if this fails to parse, something is
// wrong with the change and we better not touch it.
fixIdentResult.accountId =
parseIdent(changeFixProgress, originalIdent)
.orElseThrow(
() -> new ConfigInvalidException("field to parse id: " + originalIdentString));
String fixedIdentString =
ChangeNoteUtil.formatAccountIdentString(
fixIdentResult.accountId, originalIdent.getEmailAddress());
fixIdentResult.fixedIdentString =
fixedIdentString.equals(originalIdentString)
? Optional.empty()
: Optional.of(fixedIdentString);
return fixIdentResult;
}
/** Extracts {@link ParsedAccountInfo} from {@link Account#getNameEmail} */
private ParsedAccountInfo getAccountInfoFromNameEmail(String nameEmail) {
Matcher nameEmailMatcher = NAME_EMAIL_PATTERN.matcher(nameEmail);
if (!nameEmailMatcher.matches()) {
return ParsedAccountInfo.create(nameEmail);
}
return ParsedAccountInfo.create(
nameEmailMatcher.group(1),
nameEmailMatcher.group(2).substring(1, nameEmailMatcher.group(2).length() - 1));
}
/**
* Returns replacement for {@code accountName}.
*
* If {@code account} is known, replace with {@link AccountTemplateUtil#getAccountTemplate}.
* Otherwise, try to guess the correct replacement account for {@code accountName} among {@link
* ChangeFixProgress#parsedAccounts} that appeared in the change. If this fails {@link
* Optional#empty} is returned.
*
* @param changeFixProgress see {@link ChangeFixProgress}
* @param account account that should be used for replacement, if known
* @param accountInfo {@link ParsedAccountInfo} to replace.
* @return replacement for {@code accountName} or {@link Optional#empty}, if the replacement could
* not be determined.
*/
private Optional getPossibleAccountReplacement(
ChangeFixProgress changeFixProgress,
Optional account,
ParsedAccountInfo accountInfo) {
if (account.isPresent()) {
return Optional.of(AccountTemplateUtil.getAccountTemplate(account.get()));
}
// Retrieve reviewer accounts from cache and try to match by their name.
Map missingAccountStateReviewers =
accountCache.get(
changeFixProgress.parsedAccounts.entrySet().stream()
.filter(entry -> !entry.getValue().isPresent())
.map(Map.Entry::getKey)
.collect(ImmutableSet.toImmutableSet()));
changeFixProgress.parsedAccounts.putAll(
missingAccountStateReviewers.entrySet().stream()
.collect(
ImmutableMap.toImmutableMap(
Map.Entry::getKey, e -> Optional.ofNullable(e.getValue()))));
Map possibleReplacements = ImmutableMap.of();
if (accountInfo.email().isPresent()) {
possibleReplacements =
changeFixProgress.parsedAccounts.entrySet().stream()
.filter(
e ->
e.getValue().isPresent()
&& Objects.equals(
e.getValue().get().account().preferredEmail(),
accountInfo.email().get()))
.collect(ImmutableMap.toImmutableMap(Map.Entry::getKey, e -> e.getValue().get()));
// Filter further so we match both email & name
if (possibleReplacements.size() > 1) {
logger.atWarning().log(
"Fixing ref %s, multiple accounts found with the same email address, while replacing"
+ " %s",
changeFixProgress.changeMetaRef, accountInfo);
possibleReplacements =
possibleReplacements.entrySet().stream()
.filter(e -> Objects.equals(e.getValue().account().getName(), accountInfo.name()))
.collect(ImmutableMap.toImmutableMap(Map.Entry::getKey, Map.Entry::getValue));
}
}
if (possibleReplacements.isEmpty()) {
possibleReplacements =
changeFixProgress.parsedAccounts.entrySet().stream()
.filter(
e ->
e.getValue().isPresent()
&& Objects.equals(
e.getValue().get().account().getName(), accountInfo.name()))
.collect(ImmutableMap.toImmutableMap(Map.Entry::getKey, e -> e.getValue().get()));
}
Optional replacementName = Optional.empty();
if (possibleReplacements.isEmpty()) {
logger.atWarning().log(
"Fixing ref %s, could not find reviewer account matching name %s",
changeFixProgress.changeMetaRef, accountInfo);
} else if (possibleReplacements.size() > 1) {
logger.atWarning().log(
"Fixing ref %s found multiple reviewer account matching name %s",
changeFixProgress.changeMetaRef, accountInfo);
} else {
replacementName =
Optional.of(
AccountTemplateUtil.getAccountTemplate(
Iterables.getOnlyElement(possibleReplacements.keySet())));
}
return replacementName;
}
/**
* Cuts tree and parent lines from raw unparsed commit body, so they are not included in diff
* comparison.
*
* @param b raw unparsed commit body, see {@link RevCommit#getRawBuffer()}.
* For parsing, see {@link RawParseUtils#author}, {@link RawParseUtils#commitMessage}, etc.
* @return raw unparsed commit body, without tree and parent lines.
*/
public static byte[] cutTreeAndParents(byte[] b) {
final int sz = b.length;
int ptr = 46; // skip the "tree ..." line.
while (ptr < sz && b[ptr] == 'p') {
ptr += 48;
} // skip this parent.
return Arrays.copyOfRange(b, ptr, b.length + 1);
}
private String computeDiff(byte[] oldCommit, byte[] newCommit) throws IOException {
RawText oldBody = new RawText(cutTreeAndParents(oldCommit));
RawText newBody = new RawText(cutTreeAndParents(newCommit));
ByteArrayOutputStream out = new ByteArrayOutputStream();
EditList diff = diffAlgorithm.diff(RawTextComparator.DEFAULT, oldBody, newBody);
try (DiffFormatter fmt = new DiffFormatter(out)) {
// Do not show any unchanged lines, since it is not interesting
fmt.setContext(0);
fmt.format(diff, oldBody, newBody);
fmt.flush();
return out.toString();
}
}
private static ObjectInserter newPackInserter(Repository repo) {
if (!(repo instanceof FileRepository)) {
return repo.newObjectInserter();
}
PackInserter ins = ((FileRepository) repo).getObjectDatabase().newPackInserter();
ins.checkExisting(false);
return ins;
}
/**
* Parsed and fixed {@link PersonIdent} string, formatted as {@link
* ChangeNoteUtil#appendAccountIdIdentString}
*/
private static class FixIdentResult {
/** {@link com.google.gerrit.entities.Account.Id} parsed from PersonIdent string. */
Account.Id accountId;
/**
* Fixed ident string, that does not contain user data, or {@link Optional#empty} if fix was not
* required.
*/
Optional fixedIdentString;
}
/**
* Holds the state of change rewrite progress. Rewrite goes from the oldest commit to the most
* recent update.
*/
private static class ChangeFixProgress {
/** {@link RefNames#changeMetaRef} of the change that is being fixed. */
final String changeMetaRef;
/** Tag at current commit update. */
String tag = null;
/** Assignee at current commit update. */
Account.Id assigneeId = null;
/** Author of the current commit update. */
Optional updateAuthorId = null;
/**
* Accounts parsed so far together with their {@link Account#getName} extracted from {@link
* #accountCache} if needed by rewrite. Maps to empty string if was not requested from cache
* yet.
*/
Map> parsedAccounts = new HashMap<>();
/** Id of the current commit in rewriter walk. */
ObjectId newTipId = null;
/** If any commits were rewritten by the rewriter. */
boolean anyFixesApplied = false;
/**
* Whether all commits seen by the rewriter with the fixes applied passed the verification, see
* {@link #verifyCommit}.
*/
boolean isValidAfterFix = true;
List commitDiffs = new ArrayList<>();
public ChangeFixProgress(String changeMetaRef) {
this.changeMetaRef = changeMetaRef;
}
}
/**
* Account info parsed from {@link Account#getNameEmail}. See {@link
* #getAccountInfoFromNameEmail}.
*/
@AutoValue
abstract static class ParsedAccountInfo {
static ParsedAccountInfo create(String fullName, String email) {
return new AutoValue_CommitRewriter_ParsedAccountInfo(fullName, Optional.ofNullable(email));
}
static ParsedAccountInfo create(String fullName) {
return new AutoValue_CommitRewriter_ParsedAccountInfo(fullName, Optional.empty());
}
abstract String name();
abstract Optional email();
}
/**
* Objects, needed to fix Refs in a single {@link BatchRefUpdate}. Number of changes in a batch
* are limited by {@link RunOptions#maxRefsInBatch}.
*/
@AutoValue
abstract static class RefsUpdate implements AutoCloseable {
static RefsUpdate create(Repository repo) {
RevWalk revWalk = new RevWalk(repo);
ObjectInserter inserter = newPackInserter(repo);
BatchRefUpdate bru = repo.getRefDatabase().newBatchUpdate();
bru.setForceRefLog(true);
bru.setRefLogMessage(CommitRewriter.class.getName(), false);
bru.setAllowNonFastForwards(true);
return new AutoValue_CommitRewriter_RefsUpdate(bru, revWalk, inserter);
}
@Override
public void close() {
inserter().close();
revWalk().close();
}
abstract BatchRefUpdate batchRefUpdate();
abstract RevWalk revWalk();
abstract ObjectInserter inserter();
}
}