Move some errors to their own sub packages (#32880)

10 files changed, 57 insertions, 61 deletions

diff --git a/routers/api/v1/admin/user.go b/routers/api/v1/admin/user.go
index b0f40084da..3f4a73dcad 100644
--- a/routers/api/v1/admin/user.go
+++ b/routers/api/v1/admin/user.go
@@ -9,10 +9,12 @@ import (
 	"fmt"
 	"net/http"
 
-	"code.gitea.io/gitea/models"
 	asymkey_model "code.gitea.io/gitea/models/asymkey"
 	"code.gitea.io/gitea/models/auth"
 	"code.gitea.io/gitea/models/db"
+	org_model "code.gitea.io/gitea/models/organization"
+	packages_model "code.gitea.io/gitea/models/packages"
+	repo_model "code.gitea.io/gitea/models/repo"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/auth/password"
 	"code.gitea.io/gitea/modules/log"
@@ -247,7 +249,7 @@ func EditUser(ctx *context.APIContext) {
 	}
 
 	if err := user_service.UpdateUser(ctx, ctx.ContextUser, opts); err != nil {
-		if models.IsErrDeleteLastAdminUser(err) {
+		if user_model.IsErrDeleteLastAdminUser(err) {
 			ctx.Error(http.StatusBadRequest, "LastAdmin", err)
 		} else {
 			ctx.Error(http.StatusInternalServerError, "UpdateUser", err)
@@ -299,10 +301,10 @@ func DeleteUser(ctx *context.APIContext) {
 	}
 
 	if err := user_service.DeleteUser(ctx, ctx.ContextUser, ctx.FormBool("purge")); err != nil {
-		if models.IsErrUserOwnRepos(err) ||
-			models.IsErrUserHasOrgs(err) ||
-			models.IsErrUserOwnPackages(err) ||
-			models.IsErrDeleteLastAdminUser(err) {
+		if repo_model.IsErrUserOwnRepos(err) ||
+			org_model.IsErrUserHasOrgs(err) ||
+			packages_model.IsErrUserOwnPackages(err) ||
+			user_model.IsErrDeleteLastAdminUser(err) {
 			ctx.Error(http.StatusUnprocessableEntity, "", err)
 		} else {
 			ctx.Error(http.StatusInternalServerError, "DeleteUser", err)
diff --git a/routers/api/v1/repo/branch.go b/routers/api/v1/repo/branch.go
index 946203e97e..9a31aec314 100644
--- a/routers/api/v1/repo/branch.go
+++ b/routers/api/v1/repo/branch.go
@@ -9,7 +9,6 @@ import (
 	"fmt"
 	"net/http"
 
-	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/models/db"
 	git_model "code.gitea.io/gitea/models/git"
 	"code.gitea.io/gitea/models/organization"
@@ -24,6 +23,7 @@ import (
 	"code.gitea.io/gitea/services/context"
 	"code.gitea.io/gitea/services/convert"
 	pull_service "code.gitea.io/gitea/services/pull"
+	release_service "code.gitea.io/gitea/services/release"
 	repo_service "code.gitea.io/gitea/services/repository"
 )
 
@@ -247,7 +247,7 @@ func CreateBranch(ctx *context.APIContext) {
 	if err != nil {
 		if git_model.IsErrBranchNotExist(err) {
 			ctx.Error(http.StatusNotFound, "", "The old branch does not exist")
-		} else if models.IsErrTagAlreadyExists(err) {
+		} else if release_service.IsErrTagAlreadyExists(err) {
 			ctx.Error(http.StatusConflict, "", "The branch with the same tag already exists.")
 		} else if git_model.IsErrBranchAlreadyExists(err) || git.IsErrPushOutOfDate(err) {
 			ctx.Error(http.StatusConflict, "", "The branch already exists.")
diff --git a/routers/api/v1/repo/file.go b/routers/api/v1/repo/file.go
index 959a4b952a..83848b7add 100644
--- a/routers/api/v1/repo/file.go
+++ b/routers/api/v1/repo/file.go
@@ -15,7 +15,6 @@ import (
 	"strings"
 	"time"
 
-	"code.gitea.io/gitea/models"
 	git_model "code.gitea.io/gitea/models/git"
 	repo_model "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/models/unit"
@@ -30,6 +29,7 @@ import (
 	"code.gitea.io/gitea/modules/web"
 	"code.gitea.io/gitea/routers/common"
 	"code.gitea.io/gitea/services/context"
+	pull_service "code.gitea.io/gitea/services/pull"
 	archiver_service "code.gitea.io/gitea/services/repository/archiver"
 	files_service "code.gitea.io/gitea/services/repository/files"
 )
@@ -736,12 +736,12 @@ func UpdateFile(ctx *context.APIContext) {
 }
 
 func handleCreateOrUpdateFileError(ctx *context.APIContext, err error) {
-	if models.IsErrUserCannotCommit(err) || models.IsErrFilePathProtected(err) {
+	if files_service.IsErrUserCannotCommit(err) || pull_service.IsErrFilePathProtected(err) {
 		ctx.Error(http.StatusForbidden, "Access", err)
 		return
 	}
-	if git_model.IsErrBranchAlreadyExists(err) || models.IsErrFilenameInvalid(err) || models.IsErrSHADoesNotMatch(err) ||
-		models.IsErrFilePathInvalid(err) || models.IsErrRepoFileAlreadyExists(err) {
+	if git_model.IsErrBranchAlreadyExists(err) || files_service.IsErrFilenameInvalid(err) || pull_service.IsErrSHADoesNotMatch(err) ||
+		files_service.IsErrFilePathInvalid(err) || files_service.IsErrRepoFileAlreadyExists(err) {
 		ctx.Error(http.StatusUnprocessableEntity, "Invalid", err)
 		return
 	}
@@ -887,17 +887,17 @@ func DeleteFile(ctx *context.APIContext) {
 	}
 
 	if filesResponse, err := files_service.ChangeRepoFiles(ctx, ctx.Repo.Repository, ctx.Doer, opts); err != nil {
-		if git.IsErrBranchNotExist(err) || models.IsErrRepoFileDoesNotExist(err) || git.IsErrNotExist(err) {
+		if git.IsErrBranchNotExist(err) || files_service.IsErrRepoFileDoesNotExist(err) || git.IsErrNotExist(err) {
 			ctx.Error(http.StatusNotFound, "DeleteFile", err)
 			return
 		} else if git_model.IsErrBranchAlreadyExists(err) ||
-			models.IsErrFilenameInvalid(err) ||
-			models.IsErrSHADoesNotMatch(err) ||
-			models.IsErrCommitIDDoesNotMatch(err) ||
-			models.IsErrSHAOrCommitIDNotProvided(err) {
+			files_service.IsErrFilenameInvalid(err) ||
+			pull_service.IsErrSHADoesNotMatch(err) ||
+			files_service.IsErrCommitIDDoesNotMatch(err) ||
+			files_service.IsErrSHAOrCommitIDNotProvided(err) {
 			ctx.Error(http.StatusBadRequest, "DeleteFile", err)
 			return
-		} else if models.IsErrUserCannotCommit(err) {
+		} else if files_service.IsErrUserCannotCommit(err) {
 			ctx.Error(http.StatusForbidden, "DeleteFile", err)
 			return
 		}
diff --git a/routers/api/v1/repo/migrate.go b/routers/api/v1/repo/migrate.go
index dcbd8f3dd5..452825c0a3 100644
--- a/routers/api/v1/repo/migrate.go
+++ b/routers/api/v1/repo/migrate.go
@@ -10,13 +10,13 @@ import (
 	"net/http"
 	"strings"
 
-	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/models/db"
 	"code.gitea.io/gitea/models/organization"
 	"code.gitea.io/gitea/models/perm"
 	access_model "code.gitea.io/gitea/models/perm/access"
 	repo_model "code.gitea.io/gitea/models/repo"
 	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/graceful"
 	"code.gitea.io/gitea/modules/lfs"
 	"code.gitea.io/gitea/modules/log"
@@ -27,7 +27,6 @@ import (
 	"code.gitea.io/gitea/modules/web"
 	"code.gitea.io/gitea/services/context"
 	"code.gitea.io/gitea/services/convert"
-	"code.gitea.io/gitea/services/forms"
 	"code.gitea.io/gitea/services/migrations"
 	notify_service "code.gitea.io/gitea/services/notify"
 	repo_service "code.gitea.io/gitea/services/repository"
@@ -104,7 +103,7 @@ func Migrate(ctx *context.APIContext) {
 		}
 	}
 
-	remoteAddr, err := forms.ParseRemoteAddr(form.CloneAddr, form.AuthUsername, form.AuthPassword)
+	remoteAddr, err := git.ParseRemoteAddr(form.CloneAddr, form.AuthUsername, form.AuthPassword)
 	if err == nil {
 		err = migrations.IsMigrateURLAllowed(remoteAddr, ctx.Doer)
 	}
@@ -237,7 +236,7 @@ func handleMigrateError(ctx *context.APIContext, repoOwner *user_model.User, err
 		ctx.Error(http.StatusUnprocessableEntity, "", fmt.Sprintf("The username '%s' contains invalid characters.", err.(db.ErrNameCharsNotAllowed).Name))
 	case db.IsErrNamePatternNotAllowed(err):
 		ctx.Error(http.StatusUnprocessableEntity, "", fmt.Sprintf("The pattern '%s' is not allowed in a username.", err.(db.ErrNamePatternNotAllowed).Pattern))
-	case models.IsErrInvalidCloneAddr(err):
+	case git.IsErrInvalidCloneAddr(err):
 		ctx.Error(http.StatusUnprocessableEntity, "", err)
 	case base.IsErrNotSupported(err):
 		ctx.Error(http.StatusUnprocessableEntity, "", err)
@@ -256,8 +255,8 @@ func handleMigrateError(ctx *context.APIContext, repoOwner *user_model.User, err
 }
 
 func handleRemoteAddrError(ctx *context.APIContext, err error) {
-	if models.IsErrInvalidCloneAddr(err) {
-		addrErr := err.(*models.ErrInvalidCloneAddr)
+	if git.IsErrInvalidCloneAddr(err) {
+		addrErr := err.(*git.ErrInvalidCloneAddr)
 		switch {
 		case addrErr.IsURLError:
 			ctx.Error(http.StatusUnprocessableEntity, "", err)
diff --git a/routers/api/v1/repo/mirror.go b/routers/api/v1/repo/mirror.go
index 310b82881e..047203501e 100644
--- a/routers/api/v1/repo/mirror.go
+++ b/routers/api/v1/repo/mirror.go
@@ -9,10 +9,10 @@ import (
 	"net/http"
 	"time"
 
-	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/models/db"
 	repo_model "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/models/unit"
+	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/setting"
 	api "code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/util"
@@ -20,7 +20,6 @@ import (
 	"code.gitea.io/gitea/routers/api/v1/utils"
 	"code.gitea.io/gitea/services/context"
 	"code.gitea.io/gitea/services/convert"
-	"code.gitea.io/gitea/services/forms"
 	"code.gitea.io/gitea/services/migrations"
 	mirror_service "code.gitea.io/gitea/services/mirror"
 )
@@ -344,7 +343,7 @@ func CreatePushMirror(ctx *context.APIContext, mirrorOption *api.CreatePushMirro
 		return
 	}
 
-	address, err := forms.ParseRemoteAddr(mirrorOption.RemoteAddress, mirrorOption.RemoteUsername, mirrorOption.RemotePassword)
+	address, err := git.ParseRemoteAddr(mirrorOption.RemoteAddress, mirrorOption.RemoteUsername, mirrorOption.RemotePassword)
 	if err == nil {
 		err = migrations.IsMigrateURLAllowed(address, ctx.ContextUser)
 	}
@@ -397,8 +396,8 @@ func CreatePushMirror(ctx *context.APIContext, mirrorOption *api.CreatePushMirro
 }
 
 func HandleRemoteAddressError(ctx *context.APIContext, err error) {
-	if models.IsErrInvalidCloneAddr(err) {
-		addrErr := err.(*models.ErrInvalidCloneAddr)
+	if git.IsErrInvalidCloneAddr(err) {
+		addrErr := err.(*git.ErrInvalidCloneAddr)
 		switch {
 		case addrErr.IsProtocolInvalid:
 			ctx.Error(http.StatusBadRequest, "CreatePushMirror", "Invalid mirror protocol")
diff --git a/routers/api/v1/repo/patch.go b/routers/api/v1/repo/patch.go
index 0e0601b7d9..5e24dcf891 100644
--- a/routers/api/v1/repo/patch.go
+++ b/routers/api/v1/repo/patch.go
@@ -7,13 +7,13 @@ import (
 	"net/http"
 	"time"
 
-	"code.gitea.io/gitea/models"
 	git_model "code.gitea.io/gitea/models/git"
 	repo_model "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/modules/git"
 	api "code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/web"
 	"code.gitea.io/gitea/services/context"
+	pull_service "code.gitea.io/gitea/services/pull"
 	"code.gitea.io/gitea/services/repository/files"
 )
 
@@ -92,12 +92,12 @@ func ApplyDiffPatch(ctx *context.APIContext) {
 
 	fileResponse, err := files.ApplyDiffPatch(ctx, ctx.Repo.Repository, ctx.Doer, opts)
 	if err != nil {
-		if models.IsErrUserCannotCommit(err) || models.IsErrFilePathProtected(err) {
+		if files.IsErrUserCannotCommit(err) || pull_service.IsErrFilePathProtected(err) {
 			ctx.Error(http.StatusForbidden, "Access", err)
 			return
 		}
-		if git_model.IsErrBranchAlreadyExists(err) || models.IsErrFilenameInvalid(err) || models.IsErrSHADoesNotMatch(err) ||
-			models.IsErrFilePathInvalid(err) || models.IsErrRepoFileAlreadyExists(err) {
+		if git_model.IsErrBranchAlreadyExists(err) || files.IsErrFilenameInvalid(err) || pull_service.IsErrSHADoesNotMatch(err) ||
+			files.IsErrFilePathInvalid(err) || files.IsErrRepoFileAlreadyExists(err) {
 			ctx.Error(http.StatusUnprocessableEntity, "Invalid", err)
 			return
 		}
diff --git a/routers/api/v1/repo/pull.go b/routers/api/v1/repo/pull.go
index 6f4f3efaa1..71c4c81b67 100644
--- a/routers/api/v1/repo/pull.go
+++ b/routers/api/v1/repo/pull.go
@@ -12,7 +12,6 @@ import (
 	"strings"
 	"time"
 
-	"code.gitea.io/gitea/models"
 	activities_model "code.gitea.io/gitea/models/activities"
 	git_model "code.gitea.io/gitea/models/git"
 	issues_model "code.gitea.io/gitea/models/issues"
@@ -765,7 +764,7 @@ func EditPullRequest(ctx *context.APIContext) {
 			} else if issues_model.IsErrIssueIsClosed(err) {
 				ctx.Error(http.StatusUnprocessableEntity, "IsErrIssueIsClosed", err)
 				return
-			} else if models.IsErrPullRequestHasMerged(err) {
+			} else if pull_service.IsErrPullRequestHasMerged(err) {
 				ctx.Error(http.StatusConflict, "IsErrPullRequestHasMerged", err)
 				return
 			}
@@ -941,7 +940,7 @@ func MergePullRequest(ctx *context.APIContext) {
 			ctx.Error(http.StatusMethodNotAllowed, "PR is a work in progress", "Work in progress PRs cannot be merged")
 		} else if errors.Is(err, pull_service.ErrNotMergeableState) {
 			ctx.Error(http.StatusMethodNotAllowed, "PR not in mergeable state", "Please try again later")
-		} else if models.IsErrDisallowedToMerge(err) {
+		} else if pull_service.IsErrDisallowedToMerge(err) {
 			ctx.Error(http.StatusMethodNotAllowed, "PR is not ready to be merged", err)
 		} else if asymkey_service.IsErrWontSign(err) {
 			ctx.Error(http.StatusMethodNotAllowed, fmt.Sprintf("Protected branch %s requires signed commits but this merge would not be signed", pr.BaseBranch), err)
@@ -954,7 +953,7 @@ func MergePullRequest(ctx *context.APIContext) {
 	// handle manually-merged mark
 	if manuallyMerged {
 		if err := pull_service.MergedManually(ctx, pr, ctx.Doer, ctx.Repo.GitRepo, form.MergeCommitID); err != nil {
-			if models.IsErrInvalidMergeStyle(err) {
+			if pull_service.IsErrInvalidMergeStyle(err) {
 				ctx.Error(http.StatusMethodNotAllowed, "Invalid merge style", fmt.Errorf("%s is not allowed an allowed merge style for this repository", repo_model.MergeStyle(form.Do)))
 				return
 			}
@@ -1004,20 +1003,20 @@ func MergePullRequest(ctx *context.APIContext) {
 	}
 
 	if err := pull_service.Merge(ctx, pr, ctx.Doer, ctx.Repo.GitRepo, repo_model.MergeStyle(form.Do), form.HeadCommitID, message, false); err != nil {
-		if models.IsErrInvalidMergeStyle(err) {
+		if pull_service.IsErrInvalidMergeStyle(err) {
 			ctx.Error(http.StatusMethodNotAllowed, "Invalid merge style", fmt.Errorf("%s is not allowed an allowed merge style for this repository", repo_model.MergeStyle(form.Do)))
-		} else if models.IsErrMergeConflicts(err) {
-			conflictError := err.(models.ErrMergeConflicts)
+		} else if pull_service.IsErrMergeConflicts(err) {
+			conflictError := err.(pull_service.ErrMergeConflicts)
 			ctx.JSON(http.StatusConflict, conflictError)
-		} else if models.IsErrRebaseConflicts(err) {
-			conflictError := err.(models.ErrRebaseConflicts)
+		} else if pull_service.IsErrRebaseConflicts(err) {
+			conflictError := err.(pull_service.ErrRebaseConflicts)
 			ctx.JSON(http.StatusConflict, conflictError)
-		} else if models.IsErrMergeUnrelatedHistories(err) {
-			conflictError := err.(models.ErrMergeUnrelatedHistories)
+		} else if pull_service.IsErrMergeUnrelatedHistories(err) {
+			conflictError := err.(pull_service.ErrMergeUnrelatedHistories)
 			ctx.JSON(http.StatusConflict, conflictError)
 		} else if git.IsErrPushOutOfDate(err) {
 			ctx.Error(http.StatusConflict, "Merge", "merge push out of date")
-		} else if models.IsErrSHADoesNotMatch(err) {
+		} else if pull_service.IsErrSHADoesNotMatch(err) {
 			ctx.Error(http.StatusConflict, "Merge", "head out of date")
 		} else if git.IsErrPushRejected(err) {
 			errPushRej := err.(*git.ErrPushRejected)
@@ -1308,10 +1307,10 @@ func UpdatePullRequest(ctx *context.APIContext) {
 	message := fmt.Sprintf("Merge branch '%s' into %s", pr.BaseBranch, pr.HeadBranch)
 
 	if err = pull_service.Update(ctx, pr, ctx.Doer, message, rebase); err != nil {
-		if models.IsErrMergeConflicts(err) {
+		if pull_service.IsErrMergeConflicts(err) {
 			ctx.Error(http.StatusConflict, "Update", "merge failed because of conflict")
 			return
-		} else if models.IsErrRebaseConflicts(err) {
+		} else if pull_service.IsErrRebaseConflicts(err) {
 			ctx.Error(http.StatusConflict, "Update", "rebase failed because of conflict")
 			return
 		}
diff --git a/routers/api/v1/repo/release.go b/routers/api/v1/repo/release.go
index 478bdbd797..141f812172 100644
--- a/routers/api/v1/repo/release.go
+++ b/routers/api/v1/repo/release.go
@@ -7,7 +7,6 @@ import (
 	"fmt"
 	"net/http"
 
-	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/models/db"
 	"code.gitea.io/gitea/models/perm"
 	repo_model "code.gitea.io/gitea/models/repo"
@@ -250,7 +249,7 @@ func CreateRelease(ctx *context.APIContext) {
 		if err := release_service.CreateRelease(ctx.Repo.GitRepo, rel, nil, ""); err != nil {
 			if repo_model.IsErrReleaseAlreadyExist(err) {
 				ctx.Error(http.StatusConflict, "ReleaseAlreadyExist", err)
-			} else if models.IsErrProtectedTagName(err) {
+			} else if release_service.IsErrProtectedTagName(err) {
 				ctx.Error(http.StatusUnprocessableEntity, "ProtectedTagName", err)
 			} else if git.IsErrNotExist(err) {
 				ctx.Error(http.StatusNotFound, "ErrNotExist", fmt.Errorf("target \"%v\" not found: %w", rel.Target, err))
@@ -408,7 +407,7 @@ func DeleteRelease(ctx *context.APIContext) {
 		return
 	}
 	if err := release_service.DeleteReleaseByID(ctx, ctx.Repo.Repository, rel, ctx.Doer, false); err != nil {
-		if models.IsErrProtectedTagName(err) {
+		if release_service.IsErrProtectedTagName(err) {
 			ctx.Error(http.StatusUnprocessableEntity, "delTag", "user not allowed to delete protected tag")
 			return
 		}
diff --git a/routers/api/v1/repo/release_tags.go b/routers/api/v1/repo/release_tags.go
index 6df47af8d9..99f7a8cbf2 100644
--- a/routers/api/v1/repo/release_tags.go
+++ b/routers/api/v1/repo/release_tags.go
@@ -6,11 +6,10 @@ package repo
 import (
 	"net/http"
 
-	"code.gitea.io/gitea/models"
 	repo_model "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/services/context"
 	"code.gitea.io/gitea/services/convert"
-	releaseservice "code.gitea.io/gitea/services/release"
+	release_service "code.gitea.io/gitea/services/release"
 )
 
 // GetReleaseByTag get a single release of a repository by tag name
@@ -112,8 +111,8 @@ func DeleteReleaseByTag(ctx *context.APIContext) {
 		return
 	}
 
-	if err = releaseservice.DeleteReleaseByID(ctx, ctx.Repo.Repository, release, ctx.Doer, false); err != nil {
-		if models.IsErrProtectedTagName(err) {
+	if err = release_service.DeleteReleaseByID(ctx, ctx.Repo.Repository, release, ctx.Doer, false); err != nil {
+		if release_service.IsErrProtectedTagName(err) {
 			ctx.Error(http.StatusUnprocessableEntity, "delTag", "user not allowed to delete protected tag")
 			return
 		}
diff --git a/routers/api/v1/repo/tag.go b/routers/api/v1/repo/tag.go
index a72df78666..fe0910c735 100644
--- a/routers/api/v1/repo/tag.go
+++ b/routers/api/v1/repo/tag.go
@@ -9,7 +9,6 @@ import (
 	"net/http"
 	"strings"
 
-	"code.gitea.io/gitea/models"
 	git_model "code.gitea.io/gitea/models/git"
 	"code.gitea.io/gitea/models/organization"
 	repo_model "code.gitea.io/gitea/models/repo"
@@ -19,7 +18,7 @@ import (
 	"code.gitea.io/gitea/routers/api/v1/utils"
 	"code.gitea.io/gitea/services/context"
 	"code.gitea.io/gitea/services/convert"
-	releaseservice "code.gitea.io/gitea/services/release"
+	release_service "code.gitea.io/gitea/services/release"
 )
 
 // ListTags list all the tags of a repository
@@ -205,12 +204,12 @@ func CreateTag(ctx *context.APIContext) {
 		return
 	}
 
-	if err := releaseservice.CreateNewTag(ctx, ctx.Doer, ctx.Repo.Repository, commit.ID.String(), form.TagName, form.Message); err != nil {
-		if models.IsErrTagAlreadyExists(err) {
+	if err := release_service.CreateNewTag(ctx, ctx.Doer, ctx.Repo.Repository, commit.ID.String(), form.TagName, form.Message); err != nil {
+		if release_service.IsErrTagAlreadyExists(err) {
 			ctx.Error(http.StatusConflict, "tag exist", err)
 			return
 		}
-		if models.IsErrProtectedTagName(err) {
+		if release_service.IsErrProtectedTagName(err) {
 			ctx.Error(http.StatusUnprocessableEntity, "CreateNewTag", "user not allowed to create protected tag")
 			return
 		}
@@ -280,8 +279,8 @@ func DeleteTag(ctx *context.APIContext) {
 		return
 	}
 
-	if err = releaseservice.DeleteReleaseByID(ctx, ctx.Repo.Repository, tag, ctx.Doer, true); err != nil {
-		if models.IsErrProtectedTagName(err) {
+	if err = release_service.DeleteReleaseByID(ctx, ctx.Repo.Repository, tag, ctx.Doer, true); err != nil {
+		if release_service.IsErrProtectedTagName(err) {
 			ctx.Error(http.StatusUnprocessableEntity, "delTag", "user not allowed to delete protected tag")
 			return
 		}