fix!: disable traefik linting when DOMAIN isn't present

Also reformats the linting output to be more readable.

Closes coop-cloud/organising#319.

cli/recipe/lint.go

@@ -30,38 +30,62 @@ var recipeLintCommand = cli.Command{
 			logrus.Fatal(err)
 		}
 
-		tableCol := []string{"ref", "rule", "satisfied", "severity", "resolve"}
+		tableCol := []string{"ref", "rule", "severity", "satisfied", "skipped", "resolve"}
 		table := formatter.CreateTable(tableCol)
 
 		hasError := false
 		bar := formatter.CreateProgressbar(-1, "running recipe lint rules...")
 		for level := range lint.LintRules {
 			for _, rule := range lint.LintRules[level] {
-				ok, err := rule.Function(recipe)
-				if err != nil {
-					logrus.Warn(err)
+				if internal.OnlyErrors && rule.Level != "error" {
+					logrus.Debugf("skipping %s, does not have level \"error\"", rule.Ref)
+					continue
 				}
 
-				if !ok && rule.Level == "error" {
-					hasError = true
+				skipped := false
+				if rule.Skip(recipe) {
+					skipped = true
 				}
 
-				var result string
-				if ok {
-					result = "yes"
-				} else {
-					result = "NO"
+				skippedOutput := "-"
+				if skipped {
+					skippedOutput = "yes"
 				}
 
-				if internal.OnlyErrors {
-					if !ok && rule.Level == "error" {
-						table.Append([]string{rule.Ref, rule.Description, result, rule.Level, rule.HowToResolve})
-						bar.Add(1)
+				satisfied := false
+				if !skipped {
+					ok, err := rule.Function(recipe)
+					if err != nil {
+						logrus.Warn(err)
+					}
+
+					if !ok && rule.Level == "error" {
+						hasError = true
+					}
+
+					if ok {
+						satisfied = true
 					}
-				} else {
-					table.Append([]string{rule.Ref, rule.Description, result, rule.Level, rule.HowToResolve})
-					bar.Add(1)
 				}
+
+				satisfiedOutput := "yes"
+				if !satisfied {
+					satisfiedOutput = "NO"
+					if skipped {
+						satisfiedOutput = "-"
+					}
+				}
+
+				table.Append([]string{
+					rule.Ref,
+					rule.Description,
+					rule.Level,
+					satisfiedOutput,
+					skippedOutput,
+					rule.HowToResolve,
+				})
+
+				bar.Add(1)
 			}
 		}