chore: added interface changes to the server

app/server/appsmith-git/src/main/java/com/appsmith/git/handler/ce/FSGitHandlerCEImpl.java

@@ -5,9 +5,11 @@
 import com.appsmith.external.constants.ErrorReferenceDocUrl;
 import com.appsmith.external.dtos.GitBranchDTO;
 import com.appsmith.external.dtos.GitLogDTO;
+import com.appsmith.external.dtos.GitRefDTO;
 import com.appsmith.external.dtos.GitStatusDTO;
 import com.appsmith.external.dtos.MergeStatusDTO;
 import com.appsmith.external.git.constants.GitSpan;
+import com.appsmith.external.git.constants.ce.RefType;
 import com.appsmith.external.git.handler.FSGitHandler;
 import com.appsmith.external.helpers.Stopwatch;
 import com.appsmith.git.configurations.GitServiceConfig;
@@ -344,6 +346,52 @@ public Mono<String> createAndCheckoutToBranch(Path repoSuffix, String branchName
                 .subscribeOn(scheduler);
     }
 
+    private String createAndCheckoutBranch(Git git, GitRefDTO gitRefDTO) throws GitAPIException, IOException {
+        String branchName = gitRefDTO.getRefName();
+        git.checkout()
+                .setCreateBranch(TRUE)
+                .setName(branchName)
+                .setUpstreamMode(CreateBranchCommand.SetupUpstreamMode.TRACK)
+                .call();
+
+        repositoryHelper.updateRemoteBranchTrackingConfig(branchName, git);
+        return git.getRepository().getBranch();
+    }
+
+    private String createTag(Git git, GitRefDTO gitRefDTO) throws GitAPIException {
+        String tagName = gitRefDTO.getRefName();
+        String message = gitRefDTO.getMessage();
+        return git.tag().setName(tagName).setMessage(message).call().getName();
+    }
+
+    @Override
+    public Mono<String> createAndCheckoutReference(Path repoSuffix, GitRefDTO gitRefDTO) {
+        RefType refType = gitRefDTO.getRefType();
+        String refName = gitRefDTO.getRefName();
+
+        return Mono.using(
+                        () -> Git.open(createRepoPath(repoSuffix).toFile()),
+                        git -> Mono.fromCallable(() -> {
+                                    log.info(
+                                            "{} : Creating reference of type {} and name {} for the repo {}",
+                                            Thread.currentThread().getName(),
+                                            refType.name(),
+                                            refName,
+                                            repoSuffix);
+
+                                    if (RefType.TAG.equals(refType)) {
+                                        return createTag(git, gitRefDTO);
+                                    }
+
+                                    return createAndCheckoutBranch(git, gitRefDTO);
+                                })
+                                .timeout(Duration.ofMillis(Constraint.TIMEOUT_MILLIS))
+                                .name(GitSpan.FS_CREATE_BRANCH)
+                                .tap(Micrometer.observation(observationRegistry)),
+                        Git::close)
+                .subscribeOn(scheduler);
+    }
+
     @Override
     public Mono<Boolean> deleteBranch(Path repoSuffix, String branchName) {
         // We can safely assume that repo has been already initialised either in commit or clone flow and can directly

app/server/appsmith-interfaces/src/main/java/com/appsmith/external/dtos/GitRefDTO.java

@@ -14,6 +14,11 @@ public class GitRefDTO {
 
     RefType refType;
 
+    /**
+     * for tags, while tagging we require messages.
+     */
+    String message;
+
     boolean isDefault;
 
     boolean createdFromLocal;

app/server/appsmith-interfaces/src/main/java/com/appsmith/external/git/handler/FSGitHandler.java

@@ -2,6 +2,7 @@
 
 import com.appsmith.external.dtos.GitBranchDTO;
 import com.appsmith.external.dtos.GitLogDTO;
+import com.appsmith.external.dtos.GitRefDTO;
 import com.appsmith.external.dtos.GitStatusDTO;
 import com.appsmith.external.dtos.MergeStatusDTO;
 import org.eclipse.jgit.api.errors.GitAPIException;
@@ -80,6 +81,8 @@ Mono<String> pushApplication(
      */
     Mono<String> createAndCheckoutToBranch(Path repoSuffix, String branchName);
 
+    Mono<String> createAndCheckoutReference(Path repoSuffix, GitRefDTO gitRefDTO);
+
     /**
      * Delete a branch in the local repo
      *

app/server/appsmith-server/src/main/java/com/appsmith/server/applications/git/GitApplicationHelperCEImpl.java

@@ -1,5 +1,6 @@
 package com.appsmith.server.applications.git;
 
+import com.appsmith.external.git.constants.ce.RefType;
 import com.appsmith.server.acl.AclPermission;
 import com.appsmith.server.actioncollections.base.ActionCollectionService;
 import com.appsmith.server.applications.base.ApplicationService;
@@ -327,4 +328,16 @@ public Mono<Application> publishArtifactPostCommit(Artifact committedArtifact) {
     public Mono<? extends Artifact> validateAndPublishArtifact(Artifact artifact, boolean publish) {
         return publishArtifact(artifact, publish);
     }
+
+    @Override
+    public Mono<Application> publishArtifactPostRefCreation(
+            Artifact artifact, RefType refType, Boolean isPublishedManually) {
+        // TODO: create publish for ref type creation.
+        Application application = (Application) artifact;
+        if (RefType.TAG.equals(refType)) {
+            return Mono.just(application);
+        }
+
+        return Mono.just(application);
+    }
 }