1 files changed, 49 insertions, 30 deletions

diff --git a/routers/repo/pull.go b/routers/repo/pull.go
index 418c2e9438..1a5c4a036f 100644
--- a/routers/repo/pull.go
+++ b/routers/repo/pull.go
@@ -330,25 +330,37 @@ func PrepareViewPullInfo(ctx *context.Context, issue *models.Issue) *git.Compare
 	repo := ctx.Repo.Repository
 	pull := issue.PullRequest
 
-	var err error
-	if err = pull.GetHeadRepo(); err != nil {
+	if err := pull.GetHeadRepo(); err != nil {
 		ctx.ServerError("GetHeadRepo", err)
 		return nil
 	}
 
+	if err := pull.GetBaseRepo(); err != nil {
+		ctx.ServerError("GetBaseRepo", err)
+		return nil
+	}
+
 	setMergeTarget(ctx, pull)
 
-	if err = pull.LoadProtectedBranch(); err != nil {
+	if err := pull.LoadProtectedBranch(); err != nil {
 		ctx.ServerError("GetLatestCommitStatus", err)
 		return nil
 	}
 	ctx.Data["EnableStatusCheck"] = pull.ProtectedBranch != nil && pull.ProtectedBranch.EnableStatusCheck
 
-	var headGitRepo *git.Repository
+	baseGitRepo, err := git.OpenRepository(pull.BaseRepo.RepoPath())
+	if err != nil {
+		ctx.ServerError("OpenRepository", err)
+		return nil
+	}
+	defer baseGitRepo.Close()
 	var headBranchExist bool
+	var headBranchSha string
 	// HeadRepo may be missing
 	if pull.HeadRepo != nil {
-		headGitRepo, err = git.OpenRepository(pull.HeadRepo.RepoPath())
+		var err error
+
+		headGitRepo, err := git.OpenRepository(pull.HeadRepo.RepoPath())
 		if err != nil {
 			ctx.ServerError("OpenRepository", err)
 			return nil
@@ -358,46 +370,53 @@ func PrepareViewPullInfo(ctx *context.Context, issue *models.Issue) *git.Compare
 		headBranchExist = headGitRepo.IsBranchExist(pull.HeadBranch)
 
 		if headBranchExist {
-			sha, err := headGitRepo.GetBranchCommitID(pull.HeadBranch)
+			headBranchSha, err = headGitRepo.GetBranchCommitID(pull.HeadBranch)
 			if err != nil {
 				ctx.ServerError("GetBranchCommitID", err)
 				return nil
 			}
+		}
+	}
 
-			commitStatuses, err := models.GetLatestCommitStatus(repo, sha, 0)
-			if err != nil {
-				ctx.ServerError("GetLatestCommitStatus", err)
-				return nil
-			}
-			if len(commitStatuses) > 0 {
-				ctx.Data["LatestCommitStatuses"] = commitStatuses
-				ctx.Data["LatestCommitStatus"] = models.CalcCommitStatus(commitStatuses)
-			}
+	sha, err := baseGitRepo.GetRefCommitID(pull.GetGitRefName())
+	if err != nil {
+		ctx.ServerError(fmt.Sprintf("GetRefCommitID(%s)", pull.GetGitRefName()), err)
+		return nil
+	}
 
-			if pull.ProtectedBranch != nil && pull.ProtectedBranch.EnableStatusCheck {
-				ctx.Data["is_context_required"] = func(context string) bool {
-					for _, c := range pull.ProtectedBranch.StatusCheckContexts {
-						if c == context {
-							return true
-						}
-					}
-					return false
+	commitStatuses, err := models.GetLatestCommitStatus(repo, sha, 0)
+	if err != nil {
+		ctx.ServerError("GetLatestCommitStatus", err)
+		return nil
+	}
+	if len(commitStatuses) > 0 {
+		ctx.Data["LatestCommitStatuses"] = commitStatuses
+		ctx.Data["LatestCommitStatus"] = models.CalcCommitStatus(commitStatuses)
+	}
+
+	if pull.ProtectedBranch != nil && pull.ProtectedBranch.EnableStatusCheck {
+		ctx.Data["is_context_required"] = func(context string) bool {
+			for _, c := range pull.ProtectedBranch.StatusCheckContexts {
+				if c == context {
+					return true
 				}
-				ctx.Data["IsRequiredStatusCheckSuccess"] = pull_service.IsCommitStatusContextSuccess(commitStatuses, pull.ProtectedBranch.StatusCheckContexts)
 			}
+			return false
 		}
+		ctx.Data["IsRequiredStatusCheckSuccess"] = pull_service.IsCommitStatusContextSuccess(commitStatuses, pull.ProtectedBranch.StatusCheckContexts)
 	}
 
-	if pull.HeadRepo == nil || !headBranchExist {
+	ctx.Data["HeadBranchMovedOn"] = headBranchSha != sha
+	ctx.Data["HeadBranchCommitID"] = headBranchSha
+	ctx.Data["PullHeadCommitID"] = sha
+
+	if pull.HeadRepo == nil || !headBranchExist || headBranchSha != sha {
 		ctx.Data["IsPullRequestBroken"] = true
 		ctx.Data["HeadTarget"] = "deleted"
-		ctx.Data["NumCommits"] = 0
-		ctx.Data["NumFiles"] = 0
-		return nil
 	}
 
-	compareInfo, err := headGitRepo.GetCompareInfo(models.RepoPath(repo.Owner.Name, repo.Name),
-		pull.BaseBranch, pull.HeadBranch)
+	compareInfo, err := baseGitRepo.GetCompareInfo(pull.BaseRepo.RepoPath(),
+		pull.BaseBranch, pull.GetGitRefName())
 	if err != nil {
 		if strings.Contains(err.Error(), "fatal: Not a valid object name") {
 			ctx.Data["IsPullRequestBroken"] = true