Add actions.WORKFLOW_DIRS setting (#36619)

Fixes: https://github.com/go-gitea/gitea/issues/36612

This new setting controls which workflow directories are searched. The
default value matches the previous hardcoded behaviour.

This allows users for example to exclude `.github/workflows` from being
picked up by Actions in mirrored repositories by setting `WORKFLOW_DIRS
= .gitea/workflows`.

Signed-off-by: silverwind <me@silverwind.io>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

modules/setting/actions.go

@@ -4,6 +4,7 @@
 package setting
 
 import (
+	"errors"
 	"fmt"
 	"strings"
 	"time"
@@ -25,10 +26,12 @@ var (
 		EndlessTaskTimeout    time.Duration     `ini:"ENDLESS_TASK_TIMEOUT"`
 		AbandonedJobTimeout   time.Duration     `ini:"ABANDONED_JOB_TIMEOUT"`
 		SkipWorkflowStrings   []string          `ini:"SKIP_WORKFLOW_STRINGS"`
+		WorkflowDirs          []string          `ini:"WORKFLOW_DIRS"`
 	}{
 		Enabled:             true,
 		DefaultActionsURL:   defaultActionsURLGitHub,
 		SkipWorkflowStrings: []string{"[skip ci]", "[ci skip]", "[no ci]", "[skip actions]", "[actions skip]"},
+		WorkflowDirs:        []string{".gitea/workflows", ".github/workflows"},
 	}
 )
 
@@ -119,5 +122,20 @@ func loadActionsFrom(rootCfg ConfigProvider) error {
 		return fmt.Errorf("invalid [actions] LOG_COMPRESSION: %q", Actions.LogCompression)
 	}
 
+	workflowDirs := make([]string, 0, len(Actions.WorkflowDirs))
+	for _, dir := range Actions.WorkflowDirs {
+		dir = strings.TrimSpace(dir)
+		if dir == "" {
+			continue
+		}
+		dir = strings.ReplaceAll(dir, `\`, `/`)
+		dir = strings.TrimRight(dir, "/")
+		workflowDirs = append(workflowDirs, dir)
+	}
+	if len(workflowDirs) == 0 {
+		return errors.New("[actions] WORKFLOW_DIRS must contain at least one entry")
+	}
+	Actions.WorkflowDirs = workflowDirs
+
 	return nil
 }

modules/setting/actions_test.go

@@ -97,6 +97,65 @@ STORAGE_TYPE = minio
 	assert.Equal(t, "actions_artifacts", filepath.Base(Actions.ArtifactStorage.Path))
 }
 
+func Test_WorkflowDirs(t *testing.T) {
+	oldActions := Actions
+	defer func() {
+		Actions = oldActions
+	}()
+
+	tests := []struct {
+		name     string
+		iniStr   string
+		wantDirs []string
+		wantErr  bool
+	}{
+		{
+			name:     "default",
+			iniStr:   `[actions]`,
+			wantDirs: []string{".gitea/workflows", ".github/workflows"},
+		},
+		{
+			name:     "single dir",
+			iniStr:   "[actions]\nWORKFLOW_DIRS = .github/workflows",
+			wantDirs: []string{".github/workflows"},
+		},
+		{
+			name:     "custom order",
+			iniStr:   "[actions]\nWORKFLOW_DIRS = .github/workflows,.gitea/workflows",
+			wantDirs: []string{".github/workflows", ".gitea/workflows"},
+		},
+		{
+			name:     "whitespace trimming",
+			iniStr:   "[actions]\nWORKFLOW_DIRS = .gitea/workflows , .github/workflows ",
+			wantDirs: []string{".gitea/workflows", ".github/workflows"},
+		},
+		{
+			name:     "trailing slash normalization",
+			iniStr:   "[actions]\nWORKFLOW_DIRS = .gitea/workflows/,.github/workflows/",
+			wantDirs: []string{".gitea/workflows", ".github/workflows"},
+		},
+		{
+			name:    "only commas and whitespace",
+			iniStr:  "[actions]\nWORKFLOW_DIRS = , , ,",
+			wantErr: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			cfg, err := NewConfigProviderFromData(tt.iniStr)
+			require.NoError(t, err)
+			err = loadActionsFrom(cfg)
+			if tt.wantErr {
+				require.Error(t, err)
+				return
+			}
+			require.NoError(t, err)
+			assert.Equal(t, tt.wantDirs, Actions.WorkflowDirs)
+		})
+	}
+}
+
 func Test_getDefaultActionsURLForActions(t *testing.T) {
 	oldActions := Actions
 	oldAppURL := AppURL