remove errgroup

config_test.go

@@ -10,7 +10,6 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/require"
-	"golang.org/x/sync/errgroup"
 
 	"github.com/ktong/konf"
 )
@@ -179,26 +178,6 @@ func TestConfig_Watch(t *testing.T) {
 	require.Equal(t, "changed", cfg)
 }
 
-func TestConfig_Watch_twice(t *testing.T) {
-	t.Parallel()
-
-	config, err := konf.New(konf.WithLoader(mapWatcher(make(chan map[string]any))))
-	require.NoError(t, err)
-
-	ctx, cancel := context.WithCancel(context.Background())
-	defer cancel()
-
-	group, ctx := errgroup.WithContext(ctx)
-	group.Go(func() error {
-		return config.Watch(ctx)
-	})
-	group.Go(func() error {
-		return config.Watch(ctx)
-	})
-
-	require.EqualError(t, group.Wait(), "[konf] Watch only can be called once")
-}
-
 type mapWatcher chan map[string]any
 
 func (m mapWatcher) Load() (map[string]any, error) {

example_test.go

@@ -7,10 +7,9 @@ import (
 	"context"
 	"embed"
 	"fmt"
+	"sync"
 	"time"
 
-	"golang.org/x/sync/errgroup"
-
 	"github.com/ktong/konf"
 	"github.com/ktong/konf/provider/env"
 	"github.com/ktong/konf/provider/file"
@@ -48,17 +47,16 @@ func ExampleWatch() {
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
 	defer cancel()
 
-	group, ctx := errgroup.WithContext(ctx)
-	group.Go(func() error {
-		return konf.Watch(ctx, func() {
+	var waitGroup sync.WaitGroup
+	waitGroup.Add(1)
+	go func() {
+		if err := konf.Watch(ctx, func() {
 			fmt.Print(konf.Get[string]("server.host"))
-		})
-	})
-
-	if err := group.Wait(); err != nil {
-		// Handle error here.
-		panic(err)
-	}
+		}); err != nil {
+			panic(err)
+		}
+	}()
+	waitGroup.Wait()
 	// Output:
 }
 

go.mod

@@ -10,7 +10,6 @@ require (
 require ( // for test
 	github.com/stretchr/testify v1.8.4
 	go.uber.org/goleak v1.3.0
-	golang.org/x/sync v0.5.0
 )
 
 require ( // indirect

go.sum

@@ -4,6 +4,7 @@ github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/fsnotify/fsnotify v1.7.0 h1:8JEhPFa5W2WU7YfeZzPNqzMP6Lwt7L2715Ggo0nosvA=
 github.com/fsnotify/fsnotify v1.7.0/go.mod h1:40Bi/Hjc2AVfZrqy+aj+yEI+/bRxZnMJyTJwOpGvigM=
 github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
+github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/mitchellh/mapstructure v1.5.0 h1:jeMsZIYE/09sWLaz43PL7Gy6RuMjD2eJVyuac5Z2hdY=
@@ -14,11 +15,10 @@ github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcU
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
-golang.org/x/sync v0.5.0 h1:60k92dhOjHxJkrqnwsfl8KuaHbn/5dl0lUPUklKo3qE=
-golang.org/x/sync v0.5.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.14.0 h1:Vz7Qs629MkJkGyHxUlRHizWJRG2j8fbQKjELVSNhy7Q=
 golang.org/x/sys v0.14.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=