feat: lint before deploy/upgrade/rollback

See coop-cloud/organising#254.

pkg/recipe/lint.go

@@ -9,6 +9,7 @@ import (
 	"coopcloud.tech/abra/pkg/config"
 	"coopcloud.tech/tagcmp"
 	"github.com/docker/distribution/reference"
+	"github.com/sirupsen/logrus"
 )
 
 var Warn = "warn"
@@ -122,6 +123,29 @@ var LintRules = map[string][]LintRule{
 	},
 }
 
+func LintForErrors(recipe Recipe) error {
+	logrus.Debugf("linting for critical errors in %s configs", recipe.Name)
+
+	for level := range LintRules {
+		if level != "error" {
+			continue
+		}
+		for _, rule := range LintRules[level] {
+			ok, err := rule.Function(recipe)
+			if err != nil {
+				return err
+			}
+			if !ok {
+				return fmt.Errorf("lint error in %s configs: \"%s\" failed lint checks (%s)", recipe.Name, rule.Description, rule.Ref)
+			}
+		}
+	}
+
+	logrus.Debugf("linting successful, %s is well configured", recipe.Name)
+
+	return nil
+}
+
 func LintComposeVersion(recipe Recipe) (bool, error) {
 	if recipe.Config.Version == "3.8" {
 		return true, nil