Fix compare (#9808)

Co-authored-by: techknowlogick <matti@mdranta.net>

routers/repo/compare.go

@@ -157,12 +157,12 @@ func ParseCompareInfo(ctx *context.Context) (*models.User, *models.Repository, *
 			ctx.ServerError("OpenRepository", err)
 			return nil, nil, nil, nil, "", ""
 		}
+		defer headGitRepo.Close()
 	}
 
 	// user should have permission to read baseRepo's codes and pulls, NOT headRepo's
 	permBase, err := models.GetUserRepoPermission(baseRepo, ctx.User)
 	if err != nil {
-		headGitRepo.Close()
 		ctx.ServerError("GetUserRepoPermission", err)
 		return nil, nil, nil, nil, "", ""
 	}
@@ -173,42 +173,40 @@ func ParseCompareInfo(ctx *context.Context) (*models.User, *models.Repository, *
 				baseRepo,
 				permBase)
 		}
-		headGitRepo.Close()
 		ctx.NotFound("ParseCompareInfo", nil)
 		return nil, nil, nil, nil, "", ""
 	}
 
-	// user should have permission to read headrepo's codes
-	permHead, err := models.GetUserRepoPermission(headRepo, ctx.User)
-	if err != nil {
-		headGitRepo.Close()
-		ctx.ServerError("GetUserRepoPermission", err)
-		return nil, nil, nil, nil, "", ""
-	}
-	if !permHead.CanRead(models.UnitTypeCode) {
-		if log.IsTrace() {
-			log.Trace("Permission Denied: User: %-v cannot read code in Repo: %-v\nUser in headRepo has Permissions: %-+v",
-				ctx.User,
-				headRepo,
-				permHead)
+	if !isSameRepo {
+		// user should have permission to read headrepo's codes
+		permHead, err := models.GetUserRepoPermission(headRepo, ctx.User)
+		if err != nil {
+			ctx.ServerError("GetUserRepoPermission", err)
+			return nil, nil, nil, nil, "", ""
+		}
+		if !permHead.CanRead(models.UnitTypeCode) {
+			if log.IsTrace() {
+				log.Trace("Permission Denied: User: %-v cannot read code in Repo: %-v\nUser in headRepo has Permissions: %-+v",
+					ctx.User,
+					headRepo,
+					permHead)
+			}
+			ctx.NotFound("ParseCompareInfo", nil)
+			return nil, nil, nil, nil, "", ""
 		}
-		headGitRepo.Close()
-		ctx.NotFound("ParseCompareInfo", nil)
-		return nil, nil, nil, nil, "", ""
 	}
 
 	// Check if head branch is valid.
-	headIsCommit := ctx.Repo.GitRepo.IsCommitExist(headBranch)
+	headIsCommit := headGitRepo.IsCommitExist(headBranch)
 	headIsBranch := headGitRepo.IsBranchExist(headBranch)
 	headIsTag := headGitRepo.IsTagExist(headBranch)
 	if !headIsCommit && !headIsBranch && !headIsTag {
 		// Check if headBranch is short sha commit hash
-		if headCommit, _ := ctx.Repo.GitRepo.GetCommit(headBranch); headCommit != nil {
+		if headCommit, _ := headGitRepo.GetCommit(headBranch); headCommit != nil {
 			headBranch = headCommit.ID.String()
 			ctx.Data["HeadBranch"] = headBranch
 			headIsCommit = true
 		} else {
-			headGitRepo.Close()
 			ctx.NotFound("IsRefExist", nil)
 			return nil, nil, nil, nil, "", ""
 		}
@@ -229,14 +227,12 @@ func ParseCompareInfo(ctx *context.Context) (*models.User, *models.Repository, *
 				baseRepo,
 				permBase)
 		}
-		headGitRepo.Close()
 		ctx.NotFound("ParseCompareInfo", nil)
 		return nil, nil, nil, nil, "", ""
 	}
 
-	compareInfo, err := headGitRepo.GetCompareInfo(models.RepoPath(baseRepo.Owner.Name, baseRepo.Name), baseBranch, headBranch)
+	compareInfo, err := headGitRepo.GetCompareInfo(baseRepo.RepoPath(), baseBranch, headBranch)
 	if err != nil {
-		headGitRepo.Close()
 		ctx.ServerError("GetCompareInfo", err)
 		return nil, nil, nil, nil, "", ""
 	}