feat(格式配置): 支持格式化配置

internal.go

@@ -36,14 +36,14 @@ type parsedKeyValue struct {
 	separator string
 }
 
-func (ini *GoINI) parse() {
+func (ini *GoINI) parse(data string) {
 	ini.fileLines = nil
 	currentSection := ini.rootSection
-	if len(ini.data) == 0 {
+	if data == "" {
 		ini.rebuildIndexes()
 		return
 	}
-	for _, rawLine := range strings.Split(string(ini.data), "\n") {
+	for _, rawLine := range strings.Split(data, "\n") {
 		line, section := parseRawLine(rawLine, currentSection)
 		currentSection = section
 		ini.fileLines = append(ini.fileLines, line)
@@ -187,7 +187,7 @@ func (ini *GoINI) addSectionKey(sectionName string, keyName string, keyValue str
 
 func (ini *GoINI) ensureParsed() {
 	if ini.sectionValues == nil {
-		ini.parse()
+		ini.parse("")
 	}
 }
 
@@ -358,6 +358,41 @@ func renderLine(line iniLine) string {
 	}
 }
 
+func (ini *GoINI) formatString() string {
+	formattedLines := make([]string, 0, len(ini.fileLines))
+	pendingComments := make([]string, 0)
+	for _, line := range ini.fileLines {
+		switch line.kind {
+		case lineSection:
+			if len(formattedLines) > 0 {
+				formattedLines = append(formattedLines, "")
+			}
+			formattedLines = append(formattedLines, pendingComments...)
+			pendingComments = pendingComments[:0]
+			formattedLines = append(formattedLines, "["+line.sectionName+"]")
+		case lineKeyValue:
+			formattedLines = append(formattedLines, pendingComments...)
+			pendingComments = pendingComments[:0]
+			formattedLines = append(formattedLines, line.keyName+defaultSeparator+formatValue(line.keyValue))
+		case lineComment:
+			pendingComments = append(pendingComments, formatINIComment(line.text))
+		}
+	}
+	formattedLines = append(formattedLines, pendingComments...)
+	if len(formattedLines) == 0 {
+		return ""
+	}
+	return strings.Join(formattedLines, "\n") + "\n"
+}
+
+func formatINIComment(comment string) string {
+	comment = stripComment(comment)
+	if comment == "" {
+		return "#"
+	}
+	return "# " + comment
+}
+
 func renderKeyValue(line iniLine) string {
 	separator := line.separator
 	if separator == "" {