Replicate most of drone-helm's config

internal/helm/plan.go

@@ -0,0 +1,62 @@
+package helm
+
+import (
+	"errors"
+	"github.com/pelotech/drone-helm3/internal/run"
+)
+
+type Step interface {
+	Run() error
+}
+
+type Plan struct {
+	steps []Step
+}
+
+func NewPlan(cfg Config) (*Plan, error) {
+	p := Plan{}
+	switch cfg.Command {
+	case "upgrade":
+		steps, err := upgrade(cfg)
+		if err != nil {
+			return nil, err
+		}
+		p.steps = steps
+	case "delete":
+		return nil, errors.New("not implemented")
+	case "lint":
+		return nil, errors.New("not implemented")
+	case "help":
+		return nil, errors.New("not implemented")
+	default:
+		switch cfg.DroneEvent {
+		case "push", "tag", "deployment", "pull_request", "promote", "rollback":
+			steps, err := upgrade(cfg)
+			if err != nil {
+				return nil, err
+			}
+			p.steps = steps
+		default:
+			return nil, errors.New("not implemented")
+		}
+	}
+
+	return &p, nil
+}
+
+func (p *Plan) Execute() error {
+	for _, step := range p.steps {
+		if err := step.Run(); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func upgrade(cfg Config) ([]Step, error) {
+	steps := make([]Step, 0)
+	steps = append(steps, run.NewUpgrade(cfg.Release, cfg.Chart))
+
+	return steps, nil
+}