mirror of
https://github.com/containers/skopeo.git
synced 2025-08-26 01:59:15 +00:00
c399909f04
Dependabot was apparently not picking these up (and several haven't had a release for a long time anyway). Also move from github.com/go-check/check to its newly declared (and go.mod-enforced) name gopkg.in/check.v1. Signed-off-by: Miloslav Trmač <mitr@redhat.com>
105 lines
2.5 KiB
Go
105 lines
2.5 KiB
Go
// Copyright 2016 The Linux Foundation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package image
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"path/filepath"
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"strings"
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"github.com/opencontainers/image-spec/schema"
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"github.com/opencontainers/image-spec/specs-go/v1"
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"github.com/pkg/errors"
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)
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func layoutValidate(w walker) error {
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var blobsExist, indexExist, layoutExist bool
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if err := w.walk(func(path string, info os.FileInfo, r io.Reader) error {
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if strings.EqualFold(filepath.Base(path), "blobs") {
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blobsExist = true
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if !info.IsDir() {
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return fmt.Errorf("blobs is not a directory")
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}
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return nil
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}
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if strings.EqualFold(filepath.Base(path), "index.json") {
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indexExist = true
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if info.IsDir() {
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return fmt.Errorf("index.json is a directory")
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}
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buf, err := ioutil.ReadAll(r)
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if err != nil {
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return errors.Wrap(err, "error reading index.json")
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}
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if err := schema.ValidatorMediaTypeImageIndex.Validate(bytes.NewReader(buf)); err != nil {
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return errors.Wrap(err, "index.json validation failed")
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}
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return nil
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}
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if strings.EqualFold(filepath.Base(path), "oci-layout") {
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layoutExist = true
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if info.IsDir() {
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return fmt.Errorf("oci-layout is a directory")
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}
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var imageLayout v1.ImageLayout
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buf, err := ioutil.ReadAll(r)
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if err != nil {
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return errors.Wrap(err, "error reading oci-layout")
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}
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if err := schema.ValidatorMediaTypeLayoutHeader.Validate(bytes.NewReader(buf)); err != nil {
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return errors.Wrap(err, "oci-layout validation failed")
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}
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if err := json.Unmarshal(buf, &imageLayout); err != nil {
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return errors.Wrap(err, "oci-layout format mismatch")
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}
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return nil
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}
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return nil
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}); err != nil {
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return err
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}
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if !blobsExist {
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return fmt.Errorf("image layout must contain blobs directory")
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}
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if !indexExist {
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return fmt.Errorf("image layout must contain index.json file")
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}
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if !layoutExist {
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return fmt.Errorf("image layout must contain oci-layout file")
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}
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return nil
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}
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