Add apiVersion to plugin models (#87510)

pkg/plugins/manager/pipeline/validation/steps.go

@@ -3,6 +3,8 @@ package validation
 import (
 	"context"
 	"errors"
+	"fmt"
+	"regexp"
 	"slices"
 	"time"
 
@@ -115,3 +117,36 @@ func (a *AngularDetector) Validate(ctx context.Context, p *plugins.Plugin) error
 	p.Angular.HideDeprecation = slices.Contains(a.cfg.HideAngularDeprecation, p.ID)
 	return nil
 }
+
+// APIVersionValidation implements a ValidateFunc for validating plugin API versions.
+type APIVersionValidation struct {
+}
+
+// APIVersionValidationStep returns a new ValidateFunc for validating plugin signatures.
+func APIVersionValidationStep() ValidateFunc {
+	sv := &APIVersionValidation{}
+	return sv.Validate
+}
+
+// Validate validates the plugin signature. If a signature error is encountered, the error is recorded with the
+// pluginerrs.ErrorTracker.
+func (v *APIVersionValidation) Validate(ctx context.Context, p *plugins.Plugin) error {
+	if p.APIVersion != "" {
+		if !p.Backend {
+			return fmt.Errorf("plugin %s has an API version but is not a backend plugin", p.ID)
+		}
+		// Eventually, all backend plugins will be supported
+		if p.Type != plugins.TypeDataSource {
+			return fmt.Errorf("plugin %s has an API version but is not a datasource plugin", p.ID)
+		}
+		m, err := regexp.MatchString(`^v([\d]+)(?:(alpha|beta)([\d]+))?$`, p.APIVersion)
+		if err != nil {
+			return fmt.Errorf("failed to verify apiVersion %s: %v", p.APIVersion, err)
+		}
+		if !m {
+			return fmt.Errorf("plugin %s has an invalid API version %s", p.ID, p.APIVersion)
+		}
+	}
+
+	return nil
+}