unit: try to avoid unit file modification

Author: kayrus

unit/deserialize.go

@@ -173,13 +173,16 @@ func (l *lexer) lexNextSectionOrOptionFunc(section string) lexStep {
 		if err != nil {
 			if err == io.EOF {
 				err = nil
+				l.optchan <- &UnitOption{Section: section, Name: "", Value: ""}
 			}
 			return nil, err
 		}
 
 		if unicode.IsSpace(r) {
+			l.optchan <- &UnitOption{Section: section, Name: "", Value: fmt.Sprintf("%c", r)}
 			return l.lexNextSectionOrOptionFunc(section), nil
 		} else if r == '[' {
+			l.optchan <- &UnitOption{Section: section, Name: "", Value: ""}
 			return l.lexSectionName, nil
 		} else if isComment(r) {
 			return l.ignoreLineFunc(l.lexNextSectionOrOptionFunc(section)), nil
@@ -238,7 +241,6 @@ func (l *lexer) lexOptionValueFunc(section, name string, partial bytes.Buffer) l
 			if !eof {
 				partial.WriteRune('\n')
 			}
-
 			return l.lexOptionValueFunc(section, name, partial), nil
 		}
 

unit/serialize.go

@@ -41,17 +41,19 @@ func Serialize(opts []*UnitOption) io.Reader {
 		idx[sec] = append(idx[sec], opt)
 	}
 
-	for i, sect := range sections {
+	for _, sect := range sections {
 		writeSectionHeader(&buf, sect)
-		writeNewline(&buf)
 
 		opts := idx[sect]
 		for _, opt := range opts {
-			writeOption(&buf, opt)
-			writeNewline(&buf)
-		}
-		if i < len(sections)-1 {
-			writeNewline(&buf)
+			if len(opt.Name) == 0 && len(opt.Value) > 0 {
+				buf.WriteString(opt.Value)
+			} else if len(opt.Name) > 0 && len(opt.Value) > 0 {
+				writeNewline(&buf)
+				writeOption(&buf, opt)
+			} else {
+				writeNewline(&buf)
+			}
 		}
 	}