fix #36463: preserve sort order of exclusive labels from template repo (#36931)

When creating a new repository and copying issue labels from a template,
the explicit sort order of exclusive labels was previously being lost
(resetting to 0). This fix ensures that the original sort order for
exclusive labels (e.g., 1, 2) is properly copied and retained in the
newly created repository.

Fixes #36463

---------

Signed-off-by: Paulo Chen <paulochen@tecnico.ulisboa.pt>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

services/repository/template.go

@@ -36,6 +36,7 @@ func GenerateIssueLabels(ctx context.Context, templateRepo, generateRepo *repo_m
 			RepoID:         generateRepo.ID,
 			Name:           templateLabel.Name,
 			Exclusive:      templateLabel.Exclusive,
+			ExclusiveOrder: templateLabel.ExclusiveOrder,
 			Description:    templateLabel.Description,
 			Color:          templateLabel.Color,
 		})

tests/integration/repo_test.go

@@ -13,6 +13,8 @@ import (
 	"testing"
 	"time"
 
+	"code.gitea.io/gitea/models/db"
+	issues_model "code.gitea.io/gitea/models/issues"
 	repo_model "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/models/unit"
 	"code.gitea.io/gitea/models/unittest"
@@ -525,19 +527,39 @@ func TestGenerateRepository(t *testing.T) {
 	user2 := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
 	repo44 := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 44})
 
+	tmplRepoLabels := []*issues_model.Label{
+		{RepoID: 44, Name: "priority/high", Exclusive: true, ExclusiveOrder: 2, Color: "#ee0000", Description: "desc-high"},
+		{RepoID: 44, Name: "priority/low", Exclusive: true, ExclusiveOrder: 1, Color: "#0000ee", Description: "desc-low"},
+	}
+
+	require.NoError(t, issues_model.NewLabels(t.Context(), tmplRepoLabels...))
+
 	generatedRepo, err := repo_service.GenerateRepository(t.Context(), user2, user2, repo44, repo_service.GenerateRepoOptions{
 		Name:        "generated-from-template-44",
 		GitContent:  true,
+		IssueLabels: true,
 	})
-	assert.NoError(t, err)
+	require.NoError(t, err)
-	assert.NotNil(t, generatedRepo)
+	require.NotNil(t, generatedRepo)
 
 	exist, err := util.IsExist(repo_model.RepoPath(user2.Name, generatedRepo.Name))
-	assert.NoError(t, err)
+	require.NoError(t, err)
-	assert.True(t, exist)
+	require.True(t, exist)
 
 	unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: user2.Name, Name: generatedRepo.Name})
 
+	generatedLabels, err := issues_model.GetLabelsByRepoID(t.Context(), generatedRepo.ID, "", db.ListOptions{})
+	require.NoError(t, err)
+	require.Len(t, generatedLabels, len(tmplRepoLabels))
+	for i, tmplLabel := range tmplRepoLabels {
+		genLabel := generatedLabels[i]
+		assert.Equal(t, tmplLabel.Name, genLabel.Name)
+		assert.Equal(t, tmplLabel.Exclusive, genLabel.Exclusive)
+		assert.Equal(t, tmplLabel.ExclusiveOrder, genLabel.ExclusiveOrder)
+		assert.Equal(t, tmplLabel.Color, genLabel.Color)
+		assert.Equal(t, tmplLabel.Description, genLabel.Description)
+	}
+
 	err = repo_service.DeleteRepositoryDirectly(t.Context(), generatedRepo.ID)
 	assert.NoError(t, err)