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Go
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import ( "context" "fmt" "log/slog" "time"
"gopkg.in/yaml.v3" "tangled.org/core/api/tangled" "tangled.org/core/spindle/models" "tangled.org/core/spindle/secrets")
// DummyEngine is a no-op engine that logs all lifecycle events via slog and writes// step output to the workflow logger. Useful for testing pipeline plumbing// without a real execution backend.type DummyEngine struct { l *slog.Logger}
func New(l *slog.Logger) *DummyEngine { return &DummyEngine{l: l.With("engine", "dummy")}}
type Step struct { name string kind models.StepKind command string}
func (s Step) Name() string { return s.name }func (s Step) Command() string { return s.command }func (s Step) Kind() models.StepKind { return s.kind }
func (e *DummyEngine) InitWorkflow(twf tangled.Pipeline_Workflow, _ tangled.Pipeline) (*models.Workflow, error) { dwf := &struct { Steps []struct { Name string `yaml:"name"` Command string `yaml:"command"` } `yaml:"steps"` Environment map[string]string `yaml:"environment"` }{}
if err := yaml.Unmarshal([]byte(twf.Raw), dwf); err != nil { return nil, err }
wf := &models.Workflow{ Name: twf.Name, Environment: dwf.Environment, } for _, ds := range dwf.Steps { wf.Steps = append(wf.Steps, Step{ name: ds.Name, kind: models.StepKindUser, command: ds.Command, }) }
e.l.Info("workflow initialised", "name", twf.Name, "steps", len(wf.Steps)) return wf, nil}
func (e *DummyEngine) SetupWorkflow(_ context.Context, wid models.WorkflowId, wf *models.Workflow, wfLogger models.WorkflowLogger) error { e.l.Info("setting up workflow", "wid", wid)
setupStep := Step{name: "dummy setup", kind: models.StepKindSystem} const setupIdx = -1
wfLogger.ControlWriter(setupIdx, setupStep, models.StepStatusStart).Write([]byte{0}) defer wfLogger.ControlWriter(setupIdx, setupStep, models.StepStatusEnd).Write([]byte{0})
fmt.Fprintf(wfLogger.DataWriter(setupIdx, "stdout"), "dummy engine: workflow %q ready", wf.Name) return nil}
func (e *DummyEngine) WorkflowTimeout() time.Duration { return 5 * time.Minute}
func (e *DummyEngine) DestroyWorkflow(_ context.Context, wid models.WorkflowId) error { e.l.Info("destroying workflow", "wid", wid) return nil}
func (e *DummyEngine) RunStep(_ context.Context, wid models.WorkflowId, w *models.Workflow, idx int, _ []secrets.UnlockedSecret, wfLogger models.WorkflowLogger) error { step := w.Steps[idx] e.l.Info("running step", "wid", wid, "step", step.Name(), "command", step.Command()) fmt.Fprintf(wfLogger.DataWriter(idx, "stdout"), "$ %s", step.Command()) return nil}