parser: add option to preserve surrounded quote (#182)

ini.go

@@ -170,6 +170,8 @@ type LoadOptions struct {
 	UnparseableSections []string
 	// KeyValueDelimiters is the sequence of delimiters that are used to separate key and value. By default, it is "=:".
 	KeyValueDelimiters string
+	// PreserveSurroundedQuote indicates whether to preserve surrounded quote
+	PreserveSurroundedQuote bool
 }
 
 func LoadSources(opts LoadOptions, source interface{}, others ...interface{}) (_ *File, err error) {

ini_test.go

@@ -1248,3 +1248,35 @@ key2!value2
 		So(f.Section("section").Key("key2").String(), ShouldEqual, "value2")
 	})
 }
+
+func Test_PreserveSurroundedQuote(t *testing.T) {
+	Convey("Preserve surrounded quote test", t, func() {
+		f, err := ini.LoadSources(ini.LoadOptions{
+			PreserveSurroundedQuote: true,
+		}, []byte(`
+[section]
+key1 = "value1"
+key2 = value2
+`))
+		So(err, ShouldBeNil)
+		So(f, ShouldNotBeNil)
+
+		So(f.Section("section").Key("key1").String(), ShouldEqual, "\"value1\"")
+		So(f.Section("section").Key("key2").String(), ShouldEqual, "value2")
+	})
+
+	Convey("Preserve surrounded quote test inverse test", t, func() {
+		f, err := ini.LoadSources(ini.LoadOptions{
+			PreserveSurroundedQuote: false,
+		}, []byte(`
+[section]
+key1 = "value1"
+key2 = value2
+`))
+		So(err, ShouldBeNil)
+		So(f, ShouldNotBeNil)
+
+		So(f.Section("section").Key("key1").String(), ShouldEqual, "value1")
+		So(f.Section("section").Key("key2").String(), ShouldEqual, "value2")
+	})
+}

parser.go

@@ -198,7 +198,7 @@ func hasSurroundedQuote(in string, quote byte) bool {
 
 func (p *parser) readValue(in []byte,
 	parserBufferSize int,
-	ignoreContinuation, ignoreInlineComment, unescapeValueDoubleQuotes, unescapeValueCommentSymbols, allowPythonMultilines, spaceBeforeInlineComment bool) (string, error) {
+	ignoreContinuation, ignoreInlineComment, unescapeValueDoubleQuotes, unescapeValueCommentSymbols, allowPythonMultilines, spaceBeforeInlineComment, preserveSurroundedQuote bool) (string, error) {
 
 	line := strings.TrimLeftFunc(string(in), unicode.IsSpace)
 	if len(line) == 0 {
@@ -259,8 +259,8 @@ func (p *parser) readValue(in []byte,
 	}
 
 	// Trim single and double quotes
-	if hasSurroundedQuote(line, '\'') ||
-		hasSurroundedQuote(line, '"') {
+	if (hasSurroundedQuote(line, '\'') ||
+		hasSurroundedQuote(line, '"')) && !preserveSurroundedQuote {
 		line = line[1 : len(line)-1]
 	} else if len(valQuote) == 0 && unescapeValueCommentSymbols {
 		if strings.Contains(line, `\;`) {
@@ -433,7 +433,8 @@ func (f *File) parse(reader io.Reader) (err error) {
 						f.options.UnescapeValueDoubleQuotes,
 						f.options.UnescapeValueCommentSymbols,
 						f.options.AllowPythonMultilineValues,
-						f.options.SpaceBeforeInlineComment)
+						f.options.SpaceBeforeInlineComment,
+						f.options.PreserveSurroundedQuote)
 					if err != nil {
 						return err
 					}
@@ -467,7 +468,8 @@ func (f *File) parse(reader io.Reader) (err error) {
 			f.options.UnescapeValueDoubleQuotes,
 			f.options.UnescapeValueCommentSymbols,
 			f.options.AllowPythonMultilineValues,
-			f.options.SpaceBeforeInlineComment)
+			f.options.SpaceBeforeInlineComment,
+			f.options.PreserveSurroundedQuote)
 		if err != nil {
 			return err
 		}