fix: #59 dump config data to file error

export.go

@@ -109,7 +109,7 @@ func (c *Config) DumpTo(out io.Writer, format string) (n int64, err error) {
 	}
 
 	// encode data to string
-	encoded, err := encoder(&c.data)
+	encoded, err := encoder(c.data)
 	if err != nil {
 		return
 	}

issues_test.go

@@ -4,9 +4,11 @@ import (
 	"testing"
 
 	"github.com/gookit/config/v2"
+	"github.com/gookit/config/v2/ini"
 	"github.com/gookit/config/v2/yaml"
 	"github.com/gookit/config/v2/yamlv3"
 	"github.com/gookit/goutil/dump"
+	"github.com/gookit/goutil/fsutil"
 	"github.com/gookit/goutil/testutil"
 	"github.com/stretchr/testify/assert"
 )
@@ -112,5 +114,25 @@ func TestIssues_46(t *testing.T) {
 		dump.Println(h)
 		is.Equal(19090, h.Port)
 	})
+}
+
+// https://github.com/gookit/config/issues/46
+func TestIssues_59(t *testing.T) {
+	is := assert.New(t)
+
+	c := config.NewWithOptions("test", config.ParseEnv)
+	c.AddDriver(ini.Driver)
+
+	err := c.LoadFiles("testdata/ini_base.ini")
+	is.NoError(err)
+	dump.Println(c.Data())
+
+	dumpfile := "testdata/issues59.ini"
+	out := fsutil.MustCreateFile(dumpfile, 0666, 0666)
+	_, err = c.DumpTo(out, config.Ini)
+	is.NoError(err)
 
+	str := string(fsutil.MustReadFile(dumpfile))
+	is.Contains(str, "name = app")
+	is.Contains(str, "key1 = val1")
 }

testdata/ini_base.ini

@@ -4,6 +4,7 @@ baseKey = value
 age = 123
 envKey = ${SHELL}
 envKey1 = ${NotExist|defValue}
+multiWords = hello world
 
 [map1]
 key = val

testdata/issues59.ini

@@ -0,0 +1,12 @@
+age = 123
+baseKey = value
+debug = false
+envKey = ${SHELL}
+envKey1 = ${NotExist|defValue}
+multiWords = hello world
+name = app
+[map1]
+key = val
+key1 = val1
+key2 = val2
+