refactor(validation): simplify regex and error messages

internal/validation/validation.go

@@ -13,33 +13,26 @@ func ValidateConventionalCommit(commit string) error {
 	// type!: description
 	// or
 	// type: description
-	re := regexp.MustCompile(`^(?P<type>[a-z]+)(?P<scope>\([a-z]+\))?(?P<breaking>!)?: (?P<description>[a-z].+)$`)
+	re := regexp.MustCompile(`^(?P<type>[a-z]+)(?P<scope>\([a-z]+\))?(?P<breaking>!)?: (?P<description>.+)$`)
 	match := re.FindStringSubmatch(commit)
 
 	if len(match) == 0 {
-		return fmt.Errorf("Invalid PR title")
+		return fmt.Errorf("invalid commit format")
 	}
 
 	typeIndex := re.SubexpIndex("type")
 	scopeIndex := re.SubexpIndex("scope")
 	breakingIndex := re.SubexpIndex("breaking")
-	descriptionIndex := re.SubexpIndex("description")
 
 	commitType := match[typeIndex]
 	scope := match[scopeIndex]
 	breaking := match[breakingIndex]
-	description := match[descriptionIndex]
 
 	// Type MUST be lowercase
 	if commitType != strings.ToLower(commitType) {
 		return fmt.Errorf("type must be lowercase")
 	}
 
-	// Description MUST start with lowercase
-	if description != strings.ToLower(description) {
-		return fmt.Errorf("description must start with lowercase")
-	}
-
 	// Scope MUST be lowercase
 	if scope != "" && scope != strings.ToLower(scope) {
 		return fmt.Errorf("scope must be lowercase")