Update linter and fix errors

* disable linters that are now enabled by default in new version
* fix linter errors

pkg/commands/shell.go

@@ -18,7 +18,7 @@ package commands
 
 import (
 	"github.com/GoogleContainerTools/kaniko/pkg/dockerfile"
-	"github.com/google/go-containerregistry/pkg/v1"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/moby/buildkit/frontend/dockerfile/instructions"
 )
 

pkg/commands/shell_test.go

@@ -19,7 +19,7 @@ import (
 	"testing"
 
 	"github.com/GoogleContainerTools/kaniko/testutil"
-	"github.com/google/go-containerregistry/pkg/v1"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/moby/buildkit/frontend/dockerfile/instructions"
 )
 

pkg/commands/stopsignal.go

@@ -20,7 +20,7 @@ import (
 	"github.com/GoogleContainerTools/kaniko/pkg/dockerfile"
 	"github.com/GoogleContainerTools/kaniko/pkg/util"
 	"github.com/docker/docker/pkg/signal"
-	"github.com/google/go-containerregistry/pkg/v1"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/moby/buildkit/frontend/dockerfile/instructions"
 	"github.com/sirupsen/logrus"
 )

pkg/commands/stopsignal_test.go

@@ -20,7 +20,7 @@ import (
 
 	"github.com/GoogleContainerTools/kaniko/pkg/dockerfile"
 	"github.com/GoogleContainerTools/kaniko/testutil"
-	"github.com/google/go-containerregistry/pkg/v1"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/moby/buildkit/frontend/dockerfile/instructions"
 )
 

pkg/commands/user.go

@@ -21,7 +21,7 @@ import (
 
 	"github.com/GoogleContainerTools/kaniko/pkg/dockerfile"
 	"github.com/GoogleContainerTools/kaniko/pkg/util"
-	"github.com/google/go-containerregistry/pkg/v1"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/moby/buildkit/frontend/dockerfile/instructions"
 	"github.com/sirupsen/logrus"
 )

pkg/commands/user_test.go

@@ -21,7 +21,7 @@ import (
 	"github.com/GoogleContainerTools/kaniko/pkg/dockerfile"
 
 	"github.com/GoogleContainerTools/kaniko/testutil"
-	"github.com/google/go-containerregistry/pkg/v1"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/moby/buildkit/frontend/dockerfile/instructions"
 )
 

pkg/commands/volume.go

@@ -23,7 +23,7 @@ import (
 	"github.com/GoogleContainerTools/kaniko/pkg/dockerfile"
 
 	"github.com/GoogleContainerTools/kaniko/pkg/util"
-	"github.com/google/go-containerregistry/pkg/v1"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/moby/buildkit/frontend/dockerfile/instructions"
 	"github.com/sirupsen/logrus"
 )

pkg/commands/volume_test.go

@@ -21,7 +21,7 @@ import (
 	"github.com/GoogleContainerTools/kaniko/pkg/dockerfile"
 
 	"github.com/GoogleContainerTools/kaniko/testutil"
-	"github.com/google/go-containerregistry/pkg/v1"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/moby/buildkit/frontend/dockerfile/instructions"
 )
 

pkg/commands/workdir.go

@@ -23,7 +23,7 @@ import (
 	"github.com/GoogleContainerTools/kaniko/pkg/dockerfile"
 
 	"github.com/GoogleContainerTools/kaniko/pkg/util"
-	"github.com/google/go-containerregistry/pkg/v1"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/moby/buildkit/frontend/dockerfile/instructions"
 	"github.com/sirupsen/logrus"
 )

pkg/commands/workdir_test.go

@@ -22,7 +22,7 @@ import (
 	"github.com/GoogleContainerTools/kaniko/pkg/dockerfile"
 
 	"github.com/GoogleContainerTools/kaniko/testutil"
-	"github.com/google/go-containerregistry/pkg/v1"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/moby/buildkit/frontend/dockerfile/instructions"
 )
 

pkg/image/image.go

@@ -20,7 +20,7 @@ import (
 	"os"
 	"strings"
 
-	"github.com/google/go-containerregistry/pkg/v1"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
 
 	"github.com/sirupsen/logrus"
 )

pkg/util/image_util_test.go

@@ -22,7 +22,7 @@ import (
 
 	"github.com/GoogleContainerTools/kaniko/pkg/config"
 	"github.com/GoogleContainerTools/kaniko/testutil"
-	"github.com/google/go-containerregistry/pkg/v1"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
 	"github.com/google/go-containerregistry/pkg/v1/empty"
 	"github.com/moby/buildkit/frontend/dockerfile/instructions"
 	"github.com/moby/buildkit/frontend/dockerfile/parser"