// Copyright 2019 Google LLC All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package crane

import (
	"fmt"

	"github.com/google/go-containerregistry/pkg/name"
	"github.com/google/go-containerregistry/pkg/v1/remote"
)

// Tag adds tag to the remote img.
func Tag(img, tag string, opt ...Option) error {
	o := makeOptions(opt...)
	ref, err := name.ParseReference(img, o.name...)
	if err != nil {
		return fmt.Errorf("parsing reference %q: %v", img, err)
	}
	desc, err := remote.Get(ref, o.remote...)
	if err != nil {
		return fmt.Errorf("fetching %q: %v", img, err)
	}

	dst := ref.Context().Tag(tag)

	return remote.Tag(dst, desc, o.remote...)
}
