Display all tags for changeset

Display of all tags (as links to the  overview of the specific tag) of a given changeset in the changeset detail view.

gradle/changelog/tags_for_revision.yaml

@@ -0,0 +1,2 @@
+- type: added
+  description: Display of all tags for a given changeset in the changeset detail view

scm-core/src/main/java/sonia/scm/repository/Feature.java

@@ -53,5 +53,11 @@ public enum Feature
    *
    * @since 2.47.0
    */
-  FORCE_PUSH
+  FORCE_PUSH,
+  /**
+   * The repository supports computation of tags for a given revision.
+   *
+   * @since 3.1.0
+   */
+  TAGS_FOR_REVISION
 }

scm-core/src/main/java/sonia/scm/repository/api/TagsCommandBuilder.java

@@ -30,6 +30,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import sonia.scm.cache.Cache;
 import sonia.scm.cache.CacheManager;
+import sonia.scm.repository.Feature;
 import sonia.scm.repository.Repository;
 import sonia.scm.repository.RepositoryCacheKey;
 import sonia.scm.repository.Tag;
@@ -50,10 +51,10 @@ import java.util.List;
  * TagsCommandBuilder tagsCommand = repositoryService.getTagsCommand();
  * Tags tags = tagsCommand.getTags();
  * </code></pre>
+ *
  * @since 1.18
  */
-public final class TagsCommandBuilder
-{
+public final class TagsCommandBuilder {
 
   static final String CACHE_NAME = "sonia.cache.cmd.tags";
 
@@ -61,7 +62,9 @@ public final class TagsCommandBuilder
   private static final Logger logger =
     LoggerFactory.getLogger(TagsCommandBuilder.class);
 
-  /** cache for changesets */
+  /**
+   * cache for changesets
+   */
   private final Cache<CacheKey, Tags> cache;
 
   private final TagsCommand command;
@@ -70,6 +73,8 @@ public final class TagsCommandBuilder
 
   private boolean disableCache = false;
 
+  private String revision;
+
   /**
    * Constructs a new {@link TagsCommandBuilder}, this constructor should
    * only be called from the {@link RepositoryService}.
@@ -79,8 +84,7 @@ public final class TagsCommandBuilder
    * @param repository   repository
    */
   TagsCommandBuilder(CacheManager cacheManager, TagsCommand command,
-    Repository repository)
-  {
+                     Repository repository) {
     this.cache = cacheManager.getCache(CACHE_NAME);
     this.command = command;
     this.repository = repository;
@@ -91,97 +95,78 @@ public final class TagsCommandBuilder
    * Returns all tags from the repository.
    */
   public Tags getTags() throws IOException {
-    Tags tags;
-
-    if (disableCache)
-    {
-      if (logger.isDebugEnabled())
-      {
-        logger.debug("get tags for repository {} with disabled cache",
-          repository.getName());
-      }
-
-      tags = getTagsFromCommand();
-    }
-    else
-    {
+    if (revision != null) {
+      logger.debug("get tags for repository {} with revision {}", repository, revision);
+      return getTagsFromCommandForRevision();
+    } else if (disableCache) {
+      logger.debug("get tags for repository {} with disabled cache", repository);
+      return getTagsFromCommand();
+    } else {
       CacheKey key = new CacheKey(repository);
-
-      tags = cache.get(key);
-
-      if (tags == null)
-      {
-        if (logger.isDebugEnabled())
-        {
+      Tags tags = cache.get(key);
+      if (tags == null) {
         logger.debug("get tags for repository {}", repository);
-        }
-
         tags = getTagsFromCommand();
-
-        if (tags != null)
-        {
         cache.put(key, tags);
+      } else {
+        logger.debug("get tags for repository {} from cache", repository);
       }
-      }
-      else if (logger.isDebugEnabled())
-      {
-        logger.debug("get tags for repository {} from cache",
-          repository.getName());
-      }
-    }
-
       return tags;
     }
-
+  }
 
   /**
    * Disables the cache for tags. This means that every {@link Tag}
    * is directly retrieved from the {@link Repository}. <b>Note: </b> Disabling
    * the cache cost a lot of performance and could be much slower.
    *
-   *
    * @param disableCache true to disable the cache
-   *
    * @return {@code this}
    */
-  public TagsCommandBuilder setDisableCache(boolean disableCache)
-  {
+  public TagsCommandBuilder setDisableCache(boolean disableCache) {
     this.disableCache = disableCache;
 
     return this;
   }
 
+  /**
+   * Set revision to show all tags containing the given revision. This is only supported for repositories supporting
+   * feature {@link sonia.scm.repository.Feature#TAGS_FOR_REVISION} (@see {@link RepositoryService#isSupported(Feature)}).
+   *
+   * @return {@code this}
+   * @since 3.1.0
+   */
+  public TagsCommandBuilder forRevision(String revision) {
+    this.revision = revision;
 
+    return this;
+  }
 
-  private Tags getTagsFromCommand() throws IOException
-  {
+  private Tags getTagsFromCommand() throws IOException {
     List<Tag> tagList = command.getTags();
 
     return new Tags(tagList);
   }
 
+  private Tags getTagsFromCommandForRevision() throws IOException {
+    return new Tags(command.getTags(revision));
+  }
 
 
-
-  static class CacheKey implements RepositoryCacheKey
-  {
+  static class CacheKey implements RepositoryCacheKey {
     private final String repositoryId;
 
-    public CacheKey(Repository repository)
-    {
+    public CacheKey(Repository repository) {
       this.repositoryId = repository.getId();
     }
 
     @Override
-    public boolean equals(Object obj)
-    {
-      if (obj == null)
-      {
+    public boolean equals(Object obj) {
+      if (obj == null) {
         return false;
       }
 
-      if (getClass() != obj.getClass())
-      {
+      if (getClass() != obj.getClass()) {
         return false;
       }
 
@@ -192,15 +177,13 @@ public final class TagsCommandBuilder
 
 
     @Override
-    public int hashCode()
-    {
+    public int hashCode() {
       return Objects.hashCode(repositoryId);
     }
 
 
     @Override
-    public String getRepositoryId()
-    {
+    public String getRepositoryId() {
       return repositoryId;
     }
 

scm-core/src/main/java/sonia/scm/repository/spi/TagsCommand.java

@@ -25,15 +25,20 @@
 package sonia.scm.repository.spi;
 
 
+import sonia.scm.FeatureNotSupportedException;
+import sonia.scm.repository.Feature;
 import sonia.scm.repository.Tag;
 
 import java.io.IOException;
 import java.util.List;
 
 
-public interface TagsCommand
-{
+public interface TagsCommand {
 
 
   public List<Tag> getTags() throws IOException;
+
+  default List<Tag> getTags(String revision) throws IOException{
+    throw new FeatureNotSupportedException(Feature.TAGS_FOR_REVISION.name());
+  }
 }

scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/GitRepositoryServiceProvider.java

@@ -63,7 +63,8 @@ public class GitRepositoryServiceProvider extends RepositoryServiceProvider {
   protected static final Set<Feature> FEATURES = EnumSet.of(
     Feature.INCOMING_REVISION,
     Feature.MODIFICATIONS_BETWEEN_REVISIONS,
-    Feature.FORCE_PUSH
+    Feature.FORCE_PUSH,
+    Feature.TAGS_FOR_REVISION
   );
 
   private final Injector injector;

scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/GitTagsCommand.java

@@ -29,8 +29,10 @@ import com.google.inject.assistedinject.Assisted;
 import jakarta.inject.Inject;
 import org.eclipse.jgit.api.Git;
 import org.eclipse.jgit.api.errors.GitAPIException;
+import org.eclipse.jgit.lib.ObjectId;
 import org.eclipse.jgit.lib.Ref;
 import org.eclipse.jgit.revwalk.RevWalk;
+import sonia.scm.repository.GitUtil;
 import sonia.scm.repository.InternalRepositoryException;
 import sonia.scm.repository.Tag;
 
@@ -54,8 +56,19 @@ public class GitTagsCommand extends AbstractGitCommand implements TagsCommand {
 
   @Override
   public List<Tag> getTags() throws IOException {
+    return getTags(null);
+  }
+
+  @Override
+  public List<Tag> getTags(String revision) throws IOException {
     try (Git git = new Git(open()); RevWalk revWalk = new RevWalk(git.getRepository())) {
-      List<Ref> tagList = git.tagList().call();
+      List<Ref> tagList;
+
+      if (revision != null) {
+        tagList = git.tagList().setContains(GitUtil.getRevisionId(git.getRepository(), revision)).call();
+      } else {
+        tagList = git.tagList().call();
+      }
 
       return tagList.stream()
         .map(ref -> gitTagConverter.buildTag(git.getRepository(), revWalk, ref))

scm-plugins/scm-git-plugin/src/test/java/sonia/scm/repository/spi/GitTagsCommandTest.java

@@ -70,27 +70,51 @@ public class GitTagsCommandTest extends AbstractGitCommandTestBase {
     assertThat(lightweightTag.getRevision()).isEqualTo("86a6645eceefe8b9a247db5eb16e3d89a7e6e6d1");
   }
 
+  @Test
+  public void shouldGetTagsForRevision() throws IOException {
+    GitContext gitContext = createContext();
+    GitTagsCommand tagsCommand = new GitTagsCommand(gitContext, new GitTagConverter(gpg));
+
+    List<Tag> tags = tagsCommand.getTags("86a6645eceefe8b9a247db5eb16e3d89a7e6e6d1");
+
+    assertThat(tags).hasSize(2);
+  }
+
+  @Test
+  public void shouldGetTagsForShortenedRevision() throws IOException {
+    GitContext gitContext = createContext();
+    GitTagsCommand tagsCommand = new GitTagsCommand(gitContext, new GitTagConverter(gpg));
+
+    List<Tag> tags = tagsCommand.getTags("86a6645");
+
+    assertThat(tags).hasSize(2);
+  }
+
   @Test
   public void shouldGetSignatures() throws IOException {
     when(gpg.findPublicKeyId(ArgumentMatchers.any())).thenReturn("2BA27721F113C005CC16F06BAE63EFBC49F140CF");
     when(gpg.findPublicKey("2BA27721F113C005CC16F06BAE63EFBC49F140CF")).thenReturn(Optional.of(publicKey));
-    String signature = "-----BEGIN PGP SIGNATURE-----\n" +
-      "\n" +
-      "iQEzBAABCgAdFiEEK6J3IfETwAXMFvBrrmPvvEnxQM8FAl+9acoACgkQrmPvvEnx\n" +
-      "QM9abwgAnGP+Y/Ijli+PAsimfOmZQWYepjptoOv9m7i3bnHv8V+Qg6cm51I3E0YV\n" +
-      "R2QaxxzW9PgS4hcES+L1qs8Lwo18RurF469eZEmNb8DcUFJ3sEWeHlIl5wZNNo/v\n" +
-      "jJm0d9LNcSmtAIiQ8eDMoGdFXJzHewGickLOSsQGmfZgZus4Qlsh7r3BZTI1Zwd/\n" +
-      "6jaBFctX13FuepCTxq2SjEfRaQHIYkyFQq2o6mjL5S2qfYJ/S//gcCCzxllQrisF\n" +
-      "5fRW3LzLI4eXFH0vua7+UzNS2Rwpifg2OENJA/Kn+3R36LWEGxFK9pNqjVPRAcQj\n" +
-      "1vSkcjK26RqhAqCjNLSagM8ATZrh+g==\n" +
-      "=kUKm\n" +
-      "-----END PGP SIGNATURE-----\n";
-    String signedContent = "object 592d797cd36432e591416e8b2b98154f4f163411\n" +
-      "type commit\n" +
-      "tag signedtag\n" +
-      "tagger Arthur Dent <arthur.dent@hitchhiker.com> 1606248906 +0100\n" +
-      "\n" +
-      "this tag is signed\n";
+    String signature = """
+            -----BEGIN PGP SIGNATURE-----
+
+            iQEzBAABCgAdFiEEK6J3IfETwAXMFvBrrmPvvEnxQM8FAl+9acoACgkQrmPvvEnx
+            QM9abwgAnGP+Y/Ijli+PAsimfOmZQWYepjptoOv9m7i3bnHv8V+Qg6cm51I3E0YV
+            R2QaxxzW9PgS4hcES+L1qs8Lwo18RurF469eZEmNb8DcUFJ3sEWeHlIl5wZNNo/v
+            jJm0d9LNcSmtAIiQ8eDMoGdFXJzHewGickLOSsQGmfZgZus4Qlsh7r3BZTI1Zwd/
+            6jaBFctX13FuepCTxq2SjEfRaQHIYkyFQq2o6mjL5S2qfYJ/S//gcCCzxllQrisF
+            5fRW3LzLI4eXFH0vua7+UzNS2Rwpifg2OENJA/Kn+3R36LWEGxFK9pNqjVPRAcQj
+            1vSkcjK26RqhAqCjNLSagM8ATZrh+g==
+            =kUKm
+            -----END PGP SIGNATURE-----
+            """;
+    String signedContent = """
+            object 592d797cd36432e591416e8b2b98154f4f163411
+            type commit
+            tag signedtag
+            tagger Arthur Dent <arthur.dent@hitchhiker.com> 1606248906 +0100
+
+            this tag is signed
+            """;
     when(publicKey.verify(signedContent.getBytes(), signature.getBytes())).thenReturn(true);
 
     final GitContext gitContext = createContext();

scm-ui/ui-api/src/tags.ts

@@ -22,7 +22,7 @@
  * SOFTWARE.
  */
 import { Changeset, Link, NamespaceAndName, Repository, Tag, TagCollection } from "@scm-manager/ui-types";
-import { requiredLink } from "./links";
+import { objectLink, requiredLink } from "./links";
 import { QueryClient, useMutation, useQuery, useQueryClient } from "react-query";
 import { ApiResult } from "./base";
 import { repoQueryKey } from "./keys";
@@ -44,6 +44,23 @@ export const useTags = (repository: Repository): ApiResult<TagCollection> => {
   );
 };
 
+export const useContainedInTags = (changeset: Changeset, repository: Repository): ApiResult<TagCollection> => {
+  const link = objectLink(changeset, "containedInTags");
+
+  return useQuery<TagCollection, Error>(repoQueryKey(repository, "tags", changeset.id), () => {
+    if (link === null) {
+      return {
+        _embedded: {
+          tags: [],
+        },
+        _links: {},
+      };
+    }
+
+    return apiClient.get(link).then((response) => response.json());
+  });
+};
+
 export const useTag = (repository: Repository, name: string): ApiResult<Tag> => {
   const link = requiredLink(repository, "tags");
   return useQuery<Tag, Error>(tagQueryKey(repository, name), () =>
@@ -62,10 +79,14 @@ const invalidateCacheForTag = (queryClient: QueryClient, repository: NamespaceAn
 const createTag = (changeset: Changeset, link: string) => {
   return (name: string) => {
     return apiClient
-      .post(link, {
+      .post(
+        link,
+        {
           name,
           revision: changeset.id,
-      })
+        },
+        "application/vnd.scmm-tagRequest+json;v=2"
+      )
       .then((response) => {
         const location = response.headers.get("Location");
         if (!location) {

scm-ui/ui-webapp/public/locales/de/repos.json

@@ -307,6 +307,13 @@
     },
     "tag": {
       "create": "Tag erstellen"
+    },
+    "containedInTags": {
+      "containedInTag_one": "Enthalten in {{count}} Tag",
+      "containedInTag_other": "Enthalten in {{count}} Tags",
+      "allTags": "Alle Tags, in denen der Commit enthalten ist",
+      "showAllTags": "Alle Tags, in denen der Commit enthalten ist, einblenden",
+      "hideAllTags": "Alle Tags, in denen der Commit enthalten ist, ausblenden"
     }
   },
   "commit": {

scm-ui/ui-webapp/public/locales/en/repos.json

@@ -307,6 +307,13 @@
     },
     "tag": {
       "create": "Create Tag"
+    },
+    "containedInTags": {
+      "containedInTag_one": "Contained in {{count}} tag",
+      "containedInTag_other": "Contained in {{count}} tags",
+      "allTags": "All tags the commit is contained in",
+      "showAllTags": "Show all tags the commit is contained in",
+      "hideAllTags": "Hide all tags the commit is contained in"
     }
   },
   "commit": {

scm-ui/ui-webapp/src/repos/components/changesets/ChangesetDetails.tsx

@@ -42,12 +42,13 @@ import {
   Icon,
   Level,
   SignatureIcon,
-  Tooltip,
   SubSubtitle,
+  Tooltip,
 } from "@scm-manager/ui-components";
 import ContributorTable from "./ContributorTable";
-import { Link as ReactLink } from "react-router-dom";
+import { Link, Link as ReactLink } from "react-router-dom";
 import CreateTagModal from "./CreateTagModal";
+import { useContainedInTags } from "@scm-manager/ui-api";
 
 type Props = {
   changeset: Changeset;
@@ -74,7 +75,7 @@ const countContributors = (changeset: Changeset) => {
   return 1;
 };
 
-const ContributorColumn = styled.p`
+const ContributorColumn = styled.div`
   flex-grow: 0;
   overflow: hidden;
   text-overflow: ellipsis;
@@ -82,7 +83,7 @@ const ContributorColumn = styled.p`
   min-width: 0;
 `;
 
-const CountColumn = styled.p`
+const CountColumn = styled.div`
   text-align: right;
   white-space: nowrap;
 `;
@@ -97,8 +98,11 @@ const SeparatedParents = styled.div`
 const Contributors: FC<{ changeset: Changeset }> = ({ changeset }) => {
   const [t] = useTranslation("repos");
   const [open, setOpen] = useState(false);
-  const signatureIcon = changeset?.signatures && changeset.signatures.length > 0 && (
+  const signatureIcon =
+    changeset?.signatures && changeset.signatures.length > 0 ? (
       <SignatureIcon className="mx-2" signatures={changeset.signatures} />
+    ) : (
+      <>&nbsp;</>
     );
 
   if (open) {
@@ -116,22 +120,62 @@ const Contributors: FC<{ changeset: Changeset }> = ({ changeset }) => {
   }
 
   return (
-    <>
     <div className="is-flex is-clickable" onClick={(e) => setOpen(!open)}>
       <ContributorColumn className="is-ellipsis-overflow">
-          <Icon name="angle-right" alt={t("changeset.contributors.showList")} />{" "}
-          <ChangesetAuthor changeset={changeset} />
+        <Icon name="angle-right" alt={t("changeset.contributors.showList")} /> <ChangesetAuthor changeset={changeset} />
       </ContributorColumn>
       {signatureIcon}
       <CountColumn className="is-hidden-mobile is-hidden-tablet-only is-hidden-desktop-only">
-          (
-          <span className="has-text-link">
-            {t("changeset.contributors.count", { count: countContributors(changeset) })}
-          </span>
-          )
+        (<span>{t("changeset.contributors.count", { count: countContributors(changeset) })}</span>)
       </CountColumn>
     </div>
-    </>
+  );
+};
+
+const ContainedInTags: FC<{ changeset: Changeset; repository: Repository }> = ({ changeset, repository }) => {
+  const [t] = useTranslation("repos");
+  const [open, setOpen] = useState(false);
+  const { data, isLoading } = useContainedInTags(changeset, repository);
+
+  const tags = data?._embedded?.tags;
+
+  if (!tags || tags.length === 0 || isLoading) {
+    return <div className="mb-5"></div>;
+  }
+
+  if (open) {
+    return (
+      <div className="is-flex is-flex-direction-column mb-4">
+        <div className="is-flex">
+          <p className="is-ellipsis-overflow is-clickable mb-2" onClick={(e) => setOpen(!open)}>
+            <Icon name="angle-down" alt={t("changeset.containedInTags.hideAllTags")} />{" "}
+            {t("changeset.containedInTags.allTags")}
+          </p>
+        </div>
+        <div>
+          {" "}
+          {tags.map((tag) => (
+            <span className="tag is-info is-normal m-1">
+              <Link
+                to={`/repo/${repository.namespace}/${repository.name}/tag/${tag.name}`}
+                className="has-text-inherit"
+              >
+                {tag.name}
+              </Link>
+            </span>
+          ))}
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div className="is-flex is-clickable" onClick={() => setOpen(!open)}>
+      <ContributorColumn className="is-ellipsis-overflow">
+        <Icon name="angle-right" alt={t("changeset.containedInTags.showAllTags")} />{" "}
+        {t("changeset.containedInTags.containedInTag", { count: tags.length })}
+      </ContributorColumn>
+    </div>
   );
 };
 
@@ -177,6 +221,7 @@ const ChangesetDetails: FC<Props> = ({ changeset, repository, fileControlFactory
           </AvatarWrapper>
           <div className="media-content">
             <Contributors changeset={changeset} />
+            <ContainedInTags changeset={changeset} repository={repository} />
             <div className="is-flex is-ellipsis-overflow">
               <p>
                 <Trans i18nKey="repos:changeset.summary" components={[id, date]} />

scm-webapp/src/main/java/sonia/scm/api/v2/resources/ChangesetRootResource.java

@@ -148,7 +148,7 @@ public class ChangesetRootResource {
       mediaType = VndMediaType.ERROR_TYPE,
       schema = @Schema(implementation = ErrorDto.class)
     ))
-  public Response get(@PathParam("namespace") String namespace, @PathParam("name") String name, @PathParam("id") String id) throws IOException {
+  public ChangesetDto get(@PathParam("namespace") String namespace, @PathParam("name") String name, @PathParam("id") String id) throws IOException {
     try (RepositoryService repositoryService = serviceFactory.create(new NamespaceAndName(namespace, name))) {
       Repository repository = repositoryService.getRepository();
       RepositoryPermissions.read(repository).check();
@@ -156,7 +156,7 @@ public class ChangesetRootResource {
       if (changeset == null) {
         throw notFound(entity(Changeset.class, id).in(repository));
       }
-      return Response.ok(changesetToChangesetDtoMapper.map(changeset, repository)).build();
+      return changesetToChangesetDtoMapper.map(changeset, repository);
     }
   }
 }

scm-webapp/src/main/java/sonia/scm/api/v2/resources/DefaultChangesetToChangesetDtoMapper.java

@@ -35,6 +35,7 @@ import org.mapstruct.ObjectFactory;
 import sonia.scm.repository.Branch;
 import sonia.scm.repository.Changeset;
 import sonia.scm.repository.Contributor;
+import sonia.scm.repository.Feature;
 import sonia.scm.repository.Person;
 import sonia.scm.repository.Repository;
 import sonia.scm.repository.RepositoryPermissions;
@@ -125,6 +126,9 @@ public abstract class DefaultChangesetToChangesetDtoMapper extends HalAppenderMa
       if (repositoryService.isSupported(Command.TAG) && RepositoryPermissions.push(repository).isPermitted()) {
         linksBuilder.single(link("tag", resourceLinks.tag().create(namespace, name)));
       }
+      if (repositoryService.isSupported(Command.TAGS) && repositoryService.isSupported(Feature.TAGS_FOR_REVISION)) {
+        linksBuilder.single(link("containedInTags", resourceLinks.tag().getForChangeset(namespace, name, source.getId())));
+      }
       if (repositoryService.isSupported(Command.BRANCHES)) {
         embeddedBuilder.with("branches", branchCollectionToDtoMapper.getBranchDtoList(repository,
           getListOfObjects(source.getBranches(), branchName -> Branch.normalBranch(branchName, source.getId()))));

scm-webapp/src/main/java/sonia/scm/api/v2/resources/ResourceLinks.java

@@ -570,6 +570,10 @@ class ResourceLinks {
     String all(String namespace, String name) {
       return tagLinkBuilder.method("getRepositoryResource").parameters(namespace, name).method("tags").parameters().method("getAll").parameters().href();
     }
+
+    String getForChangeset(String namespace, String name, String changeset) {
+      return tagLinkBuilder.method("getRepositoryResource").parameters(namespace, name).method("tags").parameters().method("getForChangeset").parameters(changeset).href();
+    }
   }
 
   public DiffLinks diff() {

scm-webapp/src/main/java/sonia/scm/api/v2/resources/TagCollectionToDtoMapper.java

@@ -28,6 +28,7 @@ import com.google.inject.Inject;
 import de.otto.edison.hal.Embedded;
 import de.otto.edison.hal.HalRepresentation;
 import de.otto.edison.hal.Links;
+import sonia.scm.repository.Changeset;
 import sonia.scm.repository.Repository;
 import sonia.scm.repository.Tag;
 
@@ -53,6 +54,10 @@ public class TagCollectionToDtoMapper {
     return new HalRepresentation(createLinks(repository.getNamespace(), repository.getName()), embedDtos(getTagDtoList(tags, repository)));
   }
 
+  public HalRepresentation map(Collection<Tag> tags, Repository repository, String changeset) {
+    return new HalRepresentation(createLinks(repository.getNamespace(), repository.getName(), changeset), embedDtos(getTagDtoList(tags, repository)));
+  }
+
   public List<TagDto> getTagDtoList(Collection<Tag> tags, Repository repository) {
     return tags.stream().map(tag -> tagToTagDtoMapper.map(tag, repository)).collect(toList());
   }
@@ -75,6 +80,13 @@ public class TagCollectionToDtoMapper {
         .build();
   }
 
+  private Links createLinks(String namespace, String name, String changeset) {
+    return
+      linkingTo()
+        .self(resourceLinks.tag().getForChangeset(namespace, name, changeset))
+        .build();
+  }
+
   private Embedded embedDtos(List<TagDto> dtos) {
     return embeddedBuilder()
       .with("tags", dtos)

scm-webapp/src/main/java/sonia/scm/api/v2/resources/TagRootResource.java

@@ -24,6 +24,7 @@
 
 package sonia.scm.api.v2.resources;
 
+import de.otto.edison.hal.HalRepresentation;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.headers.Header;
 import io.swagger.v3.oas.annotations.media.Content;
@@ -33,6 +34,7 @@ import io.swagger.v3.oas.annotations.parameters.RequestBody;
 import io.swagger.v3.oas.annotations.responses.ApiResponse;
 import jakarta.inject.Inject;
 import jakarta.validation.Valid;
+import jakarta.ws.rs.Consumes;
 import jakarta.ws.rs.DELETE;
 import jakarta.ws.rs.GET;
 import jakarta.ws.rs.POST;
@@ -49,6 +51,7 @@ import sonia.scm.repository.Tags;
 import sonia.scm.repository.api.RepositoryService;
 import sonia.scm.repository.api.RepositoryServiceFactory;
 import sonia.scm.repository.api.TagCommandBuilder;
+import sonia.scm.repository.api.TagsCommandBuilder;
 import sonia.scm.web.VndMediaType;
 
 import java.io.IOException;
@@ -90,6 +93,13 @@ public class TagRootResource {
   )
   @ApiResponse(responseCode = "401", description = "not authenticated / invalid credentials")
   @ApiResponse(responseCode = "403", description = "not authorized, the current user has no privileges to read the tags")
+  @ApiResponse(
+    responseCode = "404",
+    description = "not found, repository does not exist",
+    content = @Content(
+      mediaType = VndMediaType.ERROR_TYPE,
+      schema = @Schema(implementation = ErrorDto.class)
+    ))
   @ApiResponse(
     responseCode = "500",
     description = "internal server error",
@@ -112,7 +122,7 @@ public class TagRootResource {
 
   @POST
   @Path("")
-  @Produces(VndMediaType.TAG_REQUEST)
+  @Consumes(VndMediaType.TAG_REQUEST)
   @Operation(summary = "Create tag",
     description = "Creates a new tag.",
     tags = "Repository",
@@ -140,11 +150,12 @@ public class TagRootResource {
   @ApiResponse(responseCode = "403", description = "not authorized, the current user has no privileges to read the tags")
   @ApiResponse(
     responseCode = "404",
-    description = "not found, no tag with the specified name available in the repository",
+    description = "not found, repository does not exist",
     content = @Content(
       mediaType = VndMediaType.ERROR_TYPE,
       schema = @Schema(implementation = ErrorDto.class)
     ))
+  @ApiResponse(responseCode = "409", description = "conflict, tag with given id already exists in repository")
   @ApiResponse(
     responseCode = "500",
     description = "internal server error",
@@ -187,7 +198,7 @@ public class TagRootResource {
   @ApiResponse(responseCode = "403", description = "not authorized, the current user has no privileges to read the tags")
   @ApiResponse(
     responseCode = "404",
-    description = "not found, no tag with the specified name available in the repository",
+    description = "not found, no tag with the specified name available in the repository or the repository does not exist",
     content = @Content(
       mediaType = VndMediaType.ERROR_TYPE,
       schema = @Schema(implementation = ErrorDto.class)
@@ -217,9 +228,43 @@ public class TagRootResource {
     }
   }
 
+  @GET
+  @Path("contains/{changeset}")
+  @Produces(VndMediaType.TAG_COLLECTION)
+  @Operation(summary = "Get tags for specific revision", description = "Returns all tags related to a given revision", tags = "Repository")
+  @ApiResponse(
+    responseCode = "200",
+    description = "success",
+    content = @Content(
+      mediaType = VndMediaType.TAG_COLLECTION,
+      schema = @Schema(implementation = CollectionDto.class)
+    )
+  )
+  @ApiResponse(responseCode = "401", description = "not authenticated / invalid credentials")
+  @ApiResponse(responseCode = "403", description = "not authorized, the current user has no privileges to read the tags")
+  @ApiResponse(
+    responseCode = "404",
+    description = "not found, repository does not exist",
+    content = @Content(
+      mediaType = VndMediaType.ERROR_TYPE,
+      schema = @Schema(implementation = ErrorDto.class)
+    ))
+  @ApiResponse(
+    responseCode = "500",
+    description = "internal server error",
+    content = @Content(
+      mediaType = VndMediaType.ERROR_TYPE,
+      schema = @Schema(implementation = ErrorDto.class)
+    ))
+  public HalRepresentation getForChangeset(@PathParam("namespace") String namespace, @PathParam("name") String name, @PathParam("changeset") String changeset) throws IOException {
+    try (RepositoryService repositoryService = serviceFactory.create(new NamespaceAndName(namespace, name))) {
+      TagsCommandBuilder tagsCommandBuilder = repositoryService.getTagsCommand();
+      return tagCollectionToDtoMapper.map(tagsCommandBuilder.forRevision(changeset).getTags().getTags(), repositoryService.getRepository(), changeset);
+  }
+  }
+
   @DELETE
   @Path("{tagName}")
-  @Produces(VndMediaType.TAG)
   @Operation(summary = "Delete tag", description = "Deletes the tag provided in the path", tags = "Repository")
   @ApiResponse(
     responseCode = "200",

scm-webapp/src/test/java/sonia/scm/api/v2/resources/ChangesetRootResourceTest.java

@@ -25,7 +25,6 @@
 package sonia.scm.api.v2.resources;
 
 
-import com.google.inject.util.Providers;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.shiro.subject.Subject;
 import org.apache.shiro.subject.support.SubjectThreadState;
@@ -34,68 +33,80 @@ import org.apache.shiro.util.ThreadState;
 import org.assertj.core.util.Lists;
 import org.jboss.resteasy.mock.MockHttpRequest;
 import org.jboss.resteasy.mock.MockHttpResponse;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
 import org.mockito.InjectMocks;
 import org.mockito.Mock;
-import org.mockito.junit.MockitoJUnitRunner;
+import org.mockito.junit.jupiter.MockitoExtension;
 import sonia.scm.repository.Changeset;
 import sonia.scm.repository.ChangesetPagingResult;
+import sonia.scm.repository.Feature;
 import sonia.scm.repository.NamespaceAndName;
 import sonia.scm.repository.Person;
 import sonia.scm.repository.Repository;
+import sonia.scm.repository.api.Command;
 import sonia.scm.repository.api.LogCommandBuilder;
 import sonia.scm.repository.api.RepositoryService;
 import sonia.scm.repository.api.RepositoryServiceFactory;
+import sonia.scm.web.JsonMockHttpResponse;
 import sonia.scm.web.RestDispatcher;
 import sonia.scm.web.VndMediaType;
 
+import java.io.IOException;
 import java.net.URI;
+import java.net.URISyntaxException;
 import java.time.Instant;
 import java.util.Date;
 import java.util.List;
 
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.Mock.Strictness.LENIENT;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
-@RunWith(MockitoJUnitRunner.Silent.class)
 @Slf4j
-public class ChangesetRootResourceTest extends RepositoryTestBase {
+@ExtendWith(MockitoExtension.class)
+class ChangesetRootResourceTest extends RepositoryTestBase {
 
-  public static final String CHANGESET_PATH = "space/repo/changesets/";
-  public static final String CHANGESET_URL = "/" + RepositoryRootResource.REPOSITORIES_PATH_V2 + CHANGESET_PATH;
+  static final String CHANGESET_PATH = "space/repo/changesets/";
+  static final String CHANGESET_URL = "/" + RepositoryRootResource.REPOSITORIES_PATH_V2 + CHANGESET_PATH;
 
-  private RestDispatcher dispatcher = new RestDispatcher();
+  private final RestDispatcher dispatcher = new RestDispatcher();
 
   private final URI baseUri = URI.create("/");
   private final ResourceLinks resourceLinks = ResourceLinksMock.createMock(baseUri);
 
-  @Mock
+  @Mock(strictness = LENIENT)
   private RepositoryServiceFactory serviceFactory;
 
-  @Mock
+  @Mock(strictness = LENIENT)
   private RepositoryService repositoryService;
 
-  @Mock
+  @Mock(strictness = LENIENT)
   private LogCommandBuilder logCommandBuilder;
 
+  @Mock
+  private TagCollectionToDtoMapper tagCollectionToDtoMapper;
+
   @InjectMocks
   private ChangesetCollectionToDtoMapper changesetCollectionToDtoMapper;
 
+
   @InjectMocks
   private DefaultChangesetToChangesetDtoMapperImpl changesetToChangesetDtoMapper;
 
   private final Subject subject = mock(Subject.class);
   private final ThreadState subjectThreadState = new SubjectThreadState(subject);
 
-  @Before
-  public void prepareEnvironment() {
+  @BeforeEach
+  void prepareEnvironment() {
     changesetCollectionToDtoMapper = new ChangesetCollectionToDtoMapper(changesetToChangesetDtoMapper, resourceLinks);
     changesetRootResource = new ChangesetRootResource(serviceFactory, changesetCollectionToDtoMapper, changesetToChangesetDtoMapper);
     dispatcher.addSingletonResource(getRepositoryRootResource());
@@ -108,13 +119,13 @@ public class ChangesetRootResourceTest extends RepositoryTestBase {
     when(subject.isPermitted(any(String.class))).thenReturn(true);
   }
 
-  @After
-  public void cleanupContext() {
+  @AfterEach
+  void cleanupContext() {
     ThreadContext.unbindSubject();
   }
 
   @Test
-  public void shouldGetChangeSets() throws Exception {
+  void shouldGetChangeSets() throws Exception {
     String id = "revision_123";
     Instant creationDate = Instant.now();
     String authorName = "name";
@@ -142,7 +153,7 @@ public class ChangesetRootResourceTest extends RepositoryTestBase {
   }
 
   @Test
-  public void shouldGetSinglePageOfChangeSets() throws Exception {
+  void shouldGetSinglePageOfChangeSets() throws Exception {
     String id = "revision_123";
     Instant creationDate = Instant.now();
     String authorName = "name";
@@ -169,33 +180,67 @@ public class ChangesetRootResourceTest extends RepositoryTestBase {
     assertTrue(response.getContentAsString().contains(String.format("\"description\":\"%s\"", commit)));
   }
 
-  @Test
-  public void shouldGetChangeSet() throws Exception {
-    String id = "revision_123";
-    Instant creationDate = Instant.now();
-    String authorName = "name";
-    String authorEmail = "em@i.l";
-    String commit = "my branch commit";
+  @Nested
+  class ForExistingChangeset {
 
+    private final String id = "revision_123";
+    private final Instant creationDate = Instant.now();
+    private final String authorName = "name";
+    private final String authorEmail = "em@i.l";
+    private final String commit = "my branch commit";
+
+    private final JsonMockHttpResponse response = new JsonMockHttpResponse();
+
+    @BeforeEach
+    void prepareExistingChangeset() throws URISyntaxException, IOException {
       when(logCommandBuilder.getChangeset(id)).thenReturn(
         new Changeset(id, Date.from(creationDate).getTime(), new Person(authorName, authorEmail), commit)
       );
+    }
 
+    private void executeRequest() throws URISyntaxException {
       MockHttpRequest request = MockHttpRequest
         .get(CHANGESET_URL + id)
         .accept(VndMediaType.CHANGESET);
-    MockHttpResponse response = new MockHttpResponse();
       dispatcher.invoke(request, response);
-
-    assertEquals(200, response.getStatus());
-    assertTrue(response.getContentAsString().contains(String.format("\"id\":\"%s\"", id)));
-    assertTrue(response.getContentAsString().contains(String.format("\"name\":\"%s\"", authorName)));
-    assertTrue(response.getContentAsString().contains(String.format("\"mail\":\"%s\"", authorEmail)));
-    assertTrue(response.getContentAsString().contains(String.format("\"description\":\"%s\"", commit)));
     }
 
     @Test
-  public void shouldReturnNotFoundForNonExistingChangeset() throws Exception {
+    void shouldGetChangeSet() throws URISyntaxException {
+      executeRequest();
+
+      assertThat(response.getStatus()).isEqualTo(200);
+      assertThat(response.getContentAsJson().get("id").asText()).isEqualTo(id);
+      assertThat(response.getContentAsJson().get("author").get("name").asText()).isEqualTo(authorName);
+      assertThat(response.getContentAsJson().get("author").get("mail").asText()).isEqualTo(authorEmail);
+      assertThat(response.getContentAsJson().get("description").asText()).isEqualTo(commit);
+    }
+
+    @Test
+    void shouldContainLinkForTagCreation() throws URISyntaxException {
+      when(subject.isPermitted("repository:push:repoId")).thenReturn(true);
+      when(repositoryService.isSupported(Command.TAG)).thenReturn(true);
+
+      executeRequest();
+
+      assertThat(response.getContentAsJson().get("_links").get("tag").get("href").asText())
+        .isEqualTo("/v2/repositories/space/repo/tags/");
+    }
+
+    @Test
+    void shouldContainLinkForTagsForRevision() throws URISyntaxException {
+      when(repositoryService.isSupported(Command.TAGS)).thenReturn(true);
+      when(repositoryService.isSupported(Feature.TAGS_FOR_REVISION)).thenReturn(true);
+
+      executeRequest();
+
+      assertThat(response.getContentAsJson().get("_links").get("containedInTags").get("href").asText())
+        .isEqualTo("/v2/repositories/space/repo/tags/contains/revision_123");
+    }
+  }
+
+  @Test
+  void shouldReturnNotFoundForNonExistingChangeset() throws Exception {
     MockHttpRequest request = MockHttpRequest
       .get(CHANGESET_URL + "abcd")
       .accept(VndMediaType.CHANGESET);

scm-webapp/src/test/java/sonia/scm/api/v2/resources/TagRootResourceTest.java

@@ -24,7 +24,6 @@
 
 package sonia.scm.api.v2.resources;
 
-import lombok.extern.slf4j.Slf4j;
 import org.apache.shiro.authz.AuthorizationException;
 import org.apache.shiro.subject.Subject;
 import org.apache.shiro.subject.support.SubjectThreadState;
@@ -37,6 +36,7 @@ import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.Answers;
 import org.mockito.InjectMocks;
 import org.mockito.Mock;
 import org.mockito.junit.MockitoJUnitRunner;
@@ -48,6 +48,7 @@ import sonia.scm.repository.api.RepositoryService;
 import sonia.scm.repository.api.RepositoryServiceFactory;
 import sonia.scm.repository.api.TagCommandBuilder;
 import sonia.scm.repository.api.TagsCommandBuilder;
+import sonia.scm.web.JsonMockHttpResponse;
 import sonia.scm.web.RestDispatcher;
 import sonia.scm.web.VndMediaType;
 
@@ -56,7 +57,7 @@ import java.net.URI;
 import java.net.URISyntaxException;
 import java.util.Collections;
 
-import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.ArgumentMatchers.any;
@@ -66,7 +67,6 @@ import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
-@Slf4j
 @RunWith(MockitoJUnitRunner.Silent.class)
 public class TagRootResourceTest extends RepositoryTestBase {
 
@@ -84,7 +84,7 @@ public class TagRootResourceTest extends RepositoryTestBase {
   @Mock
   private RepositoryService repositoryService;
 
-  @Mock
+  @Mock(answer = Answers.RETURNS_SELF)
   private TagsCommandBuilder tagsCommandBuilder;
   @Mock
   private TagCommandBuilder tagCommandBuilder;
@@ -175,6 +175,23 @@ public class TagRootResourceTest extends RepositoryTestBase {
     assertEquals(500, response.getStatus());
   }
 
+  @Test
+  public void shouldGetTagsForRevision() throws Exception {
+    final JsonMockHttpResponse response = new JsonMockHttpResponse();
+    Tags tags = new Tags();
+    String tag1 = "v1.0";
+    String revision1 = "revision_1234";
+    tags.setTags(Lists.newArrayList(new Tag(tag1, revision1)));
+    when(tagsCommandBuilder.forRevision(revision1).getTags()).thenReturn(tags);
+
+    MockHttpRequest request = MockHttpRequest
+      .get(TAG_URL+ "contains/" + revision1)
+      .accept(VndMediaType.TAG_COLLECTION);
+    dispatcher.invoke(request, response);
+
+    assertThat(response.getContentAsJson().get("_embedded").get("tags").get(0).get("name").asText()).isEqualTo(tag1);
+    assertThat(response.getContentAsJson().get("_links").get("self").get("href").asText()).isEqualTo("/v2/repositories/space/repo/tags/contains/revision_1234");
+  }
 
   @Test
   public void shouldGetTags() throws Exception {
@@ -191,8 +208,8 @@ public class TagRootResourceTest extends RepositoryTestBase {
       .accept(VndMediaType.TAG_COLLECTION);
     MockHttpResponse response = new MockHttpResponse();
     dispatcher.invoke(request, response);
+
     assertEquals(200, response.getStatus());
-    log.info("the content: ", response.getContentAsString());
     assertTrue(response.getContentAsString().contains(String.format("\"name\":\"%s\"", tag1)));
     assertTrue(response.getContentAsString().contains(String.format("\"revision\":\"%s\"", revision1)));
     assertTrue(response.getContentAsString().contains(String.format("\"name\":\"%s\"", tag2)));
@@ -224,7 +241,6 @@ public class TagRootResourceTest extends RepositoryTestBase {
     response = new MockHttpResponse();
     dispatcher.invoke(request, response);
     assertEquals(200, response.getStatus());
-    log.info("the content: ", response.getContentAsString());
     assertTrue(response.getContentAsString().contains(String.format("\"name\":\"%s\"", tag2)));
     assertTrue(response.getContentAsString().contains(String.format("\"revision\":\"%s\"", revision2)));
   }