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// Copyright (C) 2012 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.restapi.change;
import static com.google.gerrit.git.ObjectIds.abbreviateName;
import static com.google.gerrit.server.project.ProjectCache.illegalState;
import static java.util.stream.Collectors.joining;
import com.google.common.base.MoreObjects;
import com.google.common.base.Strings;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ListMultimap;
import com.google.common.flogger.FluentLogger;
import com.google.gerrit.common.Nullable;
import com.google.gerrit.common.UsedAt;
import com.google.gerrit.common.data.ParameterizedString;
import com.google.gerrit.entities.BranchNameKey;
import com.google.gerrit.entities.Change;
import com.google.gerrit.entities.PatchSet;
import com.google.gerrit.entities.Project;
import com.google.gerrit.entities.SubmitTypeRecord;
import com.google.gerrit.exceptions.StorageException;
import com.google.gerrit.extensions.api.changes.SubmitInput;
import com.google.gerrit.extensions.client.SubmitType;
import com.google.gerrit.extensions.common.ChangeInfo;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.extensions.restapi.ResourceConflictException;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestApiException;
import com.google.gerrit.extensions.restapi.RestModifyView;
import com.google.gerrit.extensions.restapi.UnprocessableEntityException;
import com.google.gerrit.extensions.webui.UiAction;
import com.google.gerrit.server.BranchUtil;
import com.google.gerrit.server.ChangeUtil;
import com.google.gerrit.server.CurrentUser;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.PatchSetUtil;
import com.google.gerrit.server.account.AccountResolver;
import com.google.gerrit.server.change.ChangeJson;
import com.google.gerrit.server.change.ChangeResource;
import com.google.gerrit.server.change.MergeabilityComputationBehavior;
import com.google.gerrit.server.change.RevisionResource;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.permissions.ChangePermission;
import com.google.gerrit.server.permissions.PermissionBackend;
import com.google.gerrit.server.permissions.PermissionBackendException;
import com.google.gerrit.server.project.ProjectCache;
import com.google.gerrit.server.project.ProjectState;
import com.google.gerrit.server.query.change.ChangeData;
import com.google.gerrit.server.query.change.InternalChangeQuery;
import com.google.gerrit.server.submit.ChangeSet;
import com.google.gerrit.server.submit.MergeOp;
import com.google.gerrit.server.submit.MergeSuperSet;
import com.google.gerrit.server.update.UpdateException;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collection;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
import org.eclipse.jgit.errors.ConfigInvalidException;
import org.eclipse.jgit.errors.RepositoryNotFoundException;
import org.eclipse.jgit.lib.Config;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevObject;
import org.eclipse.jgit.revwalk.RevWalk;
@Singleton
public class Submit
implements RestModifyView, UiAction {
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
private static final String DEFAULT_TOOLTIP = "Submit patch set ${patchSet} into ${branch}";
private static final String DEFAULT_TOOLTIP_ANCESTORS =
"Submit patch set ${patchSet} and ancestors (${submitSize} changes "
+ "altogether) into ${branch}";
private static final String DEFAULT_TOPIC_TOOLTIP =
"Submit all ${topicSize} changes of the same topic "
+ "(${submitSize} changes including ancestors and other "
+ "changes related by topic)";
private static final String BLOCKED_HIDDEN_SUBMIT_TOOLTIP =
"This change depends on other hidden changes which are not ready";
private static final String CLICK_FAILURE_TOOLTIP = "Clicking the button would fail";
private static final String CHANGE_UNMERGEABLE = "Problems with integrating this change";
private final GitRepositoryManager repoManager;
private final PermissionBackend permissionBackend;
private final Provider mergeOpProvider;
private final Provider mergeSuperSet;
private final AccountResolver accountResolver;
private final String label;
private final String labelWithParents;
private final ParameterizedString titlePattern;
private final ParameterizedString titlePatternWithAncestors;
private final String submitTopicLabel;
private final ParameterizedString submitTopicTooltip;
private final boolean submitWholeTopic;
private final Provider queryProvider;
private final PatchSetUtil psUtil;
private final ProjectCache projectCache;
private final ChangeJson.Factory json;
private final boolean useMergeabilityCheck;
@Inject
Submit(
GitRepositoryManager repoManager,
PermissionBackend permissionBackend,
Provider mergeOpProvider,
Provider mergeSuperSet,
AccountResolver accountResolver,
@GerritServerConfig Config cfg,
Provider queryProvider,
PatchSetUtil psUtil,
ProjectCache projectCache,
ChangeJson.Factory json) {
this.repoManager = repoManager;
this.permissionBackend = permissionBackend;
this.mergeOpProvider = mergeOpProvider;
this.mergeSuperSet = mergeSuperSet;
this.accountResolver = accountResolver;
this.label =
MoreObjects.firstNonNull(
Strings.emptyToNull(cfg.getString("change", null, "submitLabel")), "Submit");
this.labelWithParents =
MoreObjects.firstNonNull(
Strings.emptyToNull(cfg.getString("change", null, "submitLabelWithParents")),
"Submit including parents");
this.titlePattern =
new ParameterizedString(
MoreObjects.firstNonNull(
cfg.getString("change", null, "submitTooltip"), DEFAULT_TOOLTIP));
this.titlePatternWithAncestors =
new ParameterizedString(
MoreObjects.firstNonNull(
cfg.getString("change", null, "submitTooltipAncestors"),
DEFAULT_TOOLTIP_ANCESTORS));
submitWholeTopic = MergeSuperSet.wholeTopicEnabled(cfg);
this.submitTopicLabel =
MoreObjects.firstNonNull(
Strings.emptyToNull(cfg.getString("change", null, "submitTopicLabel")),
"Submit whole topic");
this.submitTopicTooltip =
new ParameterizedString(
MoreObjects.firstNonNull(
cfg.getString("change", null, "submitTopicTooltip"), DEFAULT_TOPIC_TOOLTIP));
this.queryProvider = queryProvider;
this.psUtil = psUtil;
this.projectCache = projectCache;
this.json = json;
this.useMergeabilityCheck = MergeabilityComputationBehavior.fromConfig(cfg).includeInApi();
}
@Override
public Response apply(RevisionResource rsrc, @Nullable SubmitInput input)
throws RestApiException, RepositoryNotFoundException, IOException, PermissionBackendException,
UpdateException, ConfigInvalidException {
if (input == null) {
input = new SubmitInput();
}
input.onBehalfOf = Strings.emptyToNull(input.onBehalfOf);
IdentifiedUser submitter;
if (input.onBehalfOf != null) {
submitter = onBehalfOf(rsrc, input);
} else {
rsrc.permissions().check(ChangePermission.SUBMIT);
submitter = rsrc.getUser().asIdentifiedUser();
}
projectCache
.get(rsrc.getProject())
.orElseThrow(illegalState(rsrc.getProject()))
.checkStatePermitsWrite();
return Response.ok(json.noOptions().format(mergeChange(rsrc, submitter, input)));
}
@UsedAt(UsedAt.Project.GOOGLE)
public Change mergeChange(RevisionResource rsrc, IdentifiedUser submitter, SubmitInput input)
throws RestApiException, IOException, UpdateException, ConfigInvalidException,
PermissionBackendException {
Change change = rsrc.getChange();
if (!change.isNew()) {
throw new ResourceConflictException("change is " + ChangeUtil.status(change));
} else if (!BranchUtil.branchExists(repoManager, change.getDest())) {
throw new ResourceConflictException(
String.format("destination branch \"%s\" not found.", change.getDest().branch()));
} else if (!rsrc.getPatchSet().id().equals(change.currentPatchSetId())) {
// TODO Allow submitting non-current revision by changing the current.
throw new ResourceConflictException(
String.format(
"revision %s is not current revision", rsrc.getPatchSet().commitId().name()));
}
try (MergeOp op = mergeOpProvider.get()) {
Change updatedChange;
updatedChange = op.merge(change, submitter, true, input, false);
if (updatedChange.isMerged()) {
return updatedChange;
}
throw new IllegalStateException(
String.format(
"change %s of project %s unexpectedly had status %s after submit attempt",
updatedChange.getId(), updatedChange.getProject(), updatedChange.getStatus()));
}
}
/**
* Returns a message describing what prevents the current change from being submitted - or null.
* This method only considers parent changes, and changes in the same topic. The caller is
* responsible for making sure the current change to be submitted can indeed be submitted
* (permissions, submit rules, is not a WIP...)
*
* @param cd the change the user is currently looking at
* @param cs set of changes to be submitted at once
* @param user the user who is checking to submit
* @return a reason why any of the changes is not submittable or null
*/
@Nullable
private String problemsForSubmittingChangeset(ChangeData cd, ChangeSet cs, CurrentUser user) {
try {
if (cs.furtherHiddenChanges()) {
logger.atFine().log(
"Change %d cannot be submitted by user %s because it depends on hidden changes: %s",
cd.getId().get(), user.getLoggableName(), cs.nonVisibleChanges());
return BLOCKED_HIDDEN_SUBMIT_TOOLTIP;
}
for (ChangeData c : cs.changes()) {
Set can =
permissionBackend
.user(user)
.change(c)
.test(EnumSet.of(ChangePermission.READ, ChangePermission.SUBMIT));
if (!can.contains(ChangePermission.READ)) {
logger.atFine().log(
"Change %d cannot be submitted by user %s because it depends on change %d which the user cannot read",
cd.getId().get(), user.getLoggableName(), c.getId().get());
return BLOCKED_HIDDEN_SUBMIT_TOOLTIP;
}
if (!can.contains(ChangePermission.SUBMIT)) {
return "You don't have permission to submit change " + c.getId();
}
if (c.change().isWorkInProgress()) {
return "Change " + c.getId() + " is marked work in progress";
}
try {
// The data in the change index may be stale (e.g. if submit requirements have been
// changed). For that one change for which the submit action is computed, use the
// freshly loaded ChangeData instance 'cd' instead of the potentially stale ChangeData
// instance 'c' that was loaded from the index. This makes a difference if the ChangeSet
// 'cs' only contains this one single change. If the ChangeSet contains further changes
// those may still be stale.
MergeOp.checkSubmitRequirements(cd.getId().equals(c.getId()) ? cd : c);
} catch (ResourceConflictException e) {
return (c.getId() == cd.getId())
? String.format("Change %s is not ready: %s", cd.getId(), e.getMessage())
: String.format(
"Change %s must be submitted with change %s but %s is not ready: %s",
cd.getId(), c.getId(), c.getId(), e.getMessage());
}
}
if (!useMergeabilityCheck) {
return null;
}
Collection unmergeable = getUnmergeableChanges(cs);
if (unmergeable == null) {
return CLICK_FAILURE_TOOLTIP;
} else if (!unmergeable.isEmpty()) {
for (ChangeData c : unmergeable) {
if (c.change().getKey().equals(cd.change().getKey())) {
return CHANGE_UNMERGEABLE;
}
}
return "Problems with change(s): "
+ unmergeable.stream().map(c -> c.getId().toString()).collect(joining(", "));
}
} catch (PermissionBackendException | IOException e) {
logger.atSevere().withCause(e).log("Error checking if change is submittable");
throw new StorageException("Could not determine problems for the change", e);
}
return null;
}
@Nullable
@Override
public UiAction.Description getDescription(RevisionResource resource)
throws IOException, PermissionBackendException {
Change change = resource.getChange();
if (!change.isNew() || !resource.isCurrent()) {
return null; // submit not visible
}
if (!projectCache
.get(resource.getProject())
.map(ProjectState::statePermitsWrite)
.orElse(false)) {
return null; // submit not visible
}
ChangeData cd = resource.getChangeResource().getChangeData();
try {
MergeOp.checkSubmitRequirements(cd);
} catch (ResourceConflictException e) {
return null; // submit not visible
}
ChangeSet cs =
mergeSuperSet
.get()
.completeChangeSet(cd.change(), resource.getUser(), /*includingTopicClosure= */ false);
String topic = change.getTopic();
int topicSize = 0;
if (!Strings.isNullOrEmpty(topic)) {
topicSize = queryProvider.get().noFields().byTopicOpen(topic).size();
}
boolean treatWithTopic = submitWholeTopic && !Strings.isNullOrEmpty(topic) && topicSize > 1;
String submitProblems = problemsForSubmittingChangeset(cd, cs, resource.getUser());
if (submitProblems != null) {
return new UiAction.Description()
.setLabel(treatWithTopic ? submitTopicLabel : (cs.size() > 1) ? labelWithParents : label)
.setTitle(submitProblems)
.setVisible(true)
.setEnabled(false);
}
// Recheck mergeability rather than using value stored in the index, which may be stale.
// TODO(dborowitz): This is ugly; consider providing a way to not read stored fields from the
// index in the first place.
// cd.setMergeable(null);
// That was done in unmergeableChanges which was called by problemsForSubmittingChangeset, so
// now it is safe to read from the cache, as it yields the same result.
Boolean enabled = useMergeabilityCheck ? cd.isMergeable() : true;
if (treatWithTopic) {
ImmutableMap params =
ImmutableMap.of(
"topicSize", String.valueOf(topicSize),
"submitSize", String.valueOf(cs.size()));
return new UiAction.Description()
.setLabel(submitTopicLabel)
.setTitle(Strings.emptyToNull(submitTopicTooltip.replace(params)))
.setVisible(true)
.setEnabled(Boolean.TRUE.equals(enabled));
}
ImmutableMap params =
ImmutableMap.of(
"patchSet", String.valueOf(resource.getPatchSet().number()),
"branch", change.getDest().shortName(),
"commit", abbreviateName(resource.getPatchSet().commitId()),
"submitSize", String.valueOf(cs.size()));
ParameterizedString tp = cs.size() > 1 ? titlePatternWithAncestors : titlePattern;
return new UiAction.Description()
.setLabel(cs.size() > 1 ? labelWithParents : label)
.setTitle(Strings.emptyToNull(tp.replace(params)))
.setVisible(true)
.setEnabled(Boolean.TRUE.equals(enabled));
}
@Nullable
public Collection getUnmergeableChanges(ChangeSet cs) throws IOException {
Set unmergeableChanges = new HashSet<>();
Set outDatedPatchSets = new HashSet<>();
for (ChangeData change : cs.changes()) {
unmergeableChanges.add(change);
addAllOutdatedPatchSets(outDatedPatchSets, change);
}
ListMultimap cbb = cs.changesByBranch();
for (BranchNameKey branch : cbb.keySet()) {
List targetBranch = cbb.get(branch);
HashMap commits = mapToCommits(targetBranch, branch.project());
Set allParents =
commits.values().stream()
.flatMap(c -> Arrays.stream(c.getParents()))
.map(RevObject::getId)
.collect(Collectors.toSet());
for (ChangeData change : targetBranch) {
RevCommit commit = commits.get(change.getId());
boolean isMergeCommit = commit.getParentCount() > 1;
boolean isLastInChain = !allParents.contains(commit.getId());
if (Arrays.stream(commit.getParents()).anyMatch(c -> outDatedPatchSets.contains(c.getId()))
&& !isCherryPickSubmit(change)) {
// Found a parent that depends on an outdated patchset and the submit strategy is not
// cherry-pick.
continue;
}
// Recheck mergeability rather than using value stored in the index,
// which may be stale.
// TODO(dborowitz): This is ugly; consider providing a way to not read
// stored fields from the index in the first place.
change.setMergeable(null);
Boolean mergeable = change.isMergeable();
if (mergeable == null) {
// Skip whole check, cannot determine if mergeable
return null;
}
if (mergeable) {
unmergeableChanges.remove(change);
}
if (isLastInChain && isMergeCommit && mergeable) {
targetBranch.stream().forEach(unmergeableChanges::remove);
break;
}
}
}
return unmergeableChanges;
}
/**
* Add all outdated patch-sets (non-last patch-sets) to the output set {@code outdatedPatchSets}.
*/
private static void addAllOutdatedPatchSets(Set outdatedPatchSets, ChangeData cd) {
outdatedPatchSets.addAll(
cd.notes().getPatchSets().values().stream()
.map(p -> p.commitId())
.collect(Collectors.toSet()));
outdatedPatchSets.remove(cd.currentPatchSet().commitId());
}
private boolean isCherryPickSubmit(ChangeData changeData) {
SubmitTypeRecord submitTypeRecord = changeData.submitTypeRecord();
return submitTypeRecord.isOk() && submitTypeRecord.type == SubmitType.CHERRY_PICK;
}
/** Map input {@code changes} to the commit SHA-1 of their latest patch-set. */
private HashMap mapToCommits(
Collection changes, Project.NameKey project) throws IOException {
HashMap commits = new HashMap<>();
try (Repository repo = repoManager.openRepository(project);
RevWalk walk = new RevWalk(repo)) {
for (ChangeData change : changes) {
RevCommit commit = walk.parseCommit(psUtil.current(change.notes()).commitId());
commits.put(change.getId(), commit);
}
}
return commits;
}
private IdentifiedUser onBehalfOf(RevisionResource rsrc, SubmitInput in)
throws AuthException, UnprocessableEntityException, PermissionBackendException, IOException,
ConfigInvalidException {
PermissionBackend.ForChange perm = rsrc.permissions();
perm.check(ChangePermission.SUBMIT);
perm.check(ChangePermission.SUBMIT_AS);
CurrentUser caller = rsrc.getUser();
IdentifiedUser submitter =
accountResolver.resolve(in.onBehalfOf).asUniqueUserOnBehalfOf(caller);
try {
permissionBackend.user(submitter).change(rsrc.getNotes()).check(ChangePermission.READ);
} catch (AuthException e) {
throw new UnprocessableEntityException(
String.format("on_behalf_of account %s cannot see change", submitter.getAccountId()), e);
}
return submitter;
}
public static class CurrentRevision implements RestModifyView {
private final Submit submit;
private final PatchSetUtil psUtil;
@Inject
CurrentRevision(Submit submit, PatchSetUtil psUtil) {
this.submit = submit;
this.psUtil = psUtil;
}
@Override
public Response apply(ChangeResource rsrc, SubmitInput input) throws Exception {
PatchSet ps = psUtil.current(rsrc.getNotes());
if (ps == null) {
throw new ResourceConflictException("current revision is missing");
}
return submit.apply(new RevisionResource(rsrc, ps), input);
}
}
}
