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// Copyright 2016 The Linux Foundation
//
// 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 main
import (
"fmt"
"log"
"os"
"strings"
"github.com/opencontainers/image-spec/image"
"github.com/opencontainers/image-spec/schema"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
// supported validation types
var validateTypes = []string{
typeImageLayout,
typeImage,
typeManifest,
typeManifestList,
typeConfig,
}
type validateCmd struct {
stdout *log.Logger
stderr *log.Logger
typ string // the type to validate, can be empty string
refs []string
}
func newValidateCmd(stdout, stderr *log.Logger) *cobra.Command {
v := &validateCmd{
stdout: stdout,
stderr: stderr,
}
cmd := &cobra.Command{
Use: "validate FILE...",
Short: "Validate one or more image files",
Run: v.Run,
}
cmd.Flags().StringVar(
&v.typ, "type", "",
fmt.Sprintf(
`Type of the file to validate. If unset, oci-image-tool will try to auto-detect the type. One of "%s".`,
strings.Join(validateTypes, ","),
),
)
cmd.Flags().StringSliceVar(
&v.refs, "ref", nil,
`A set of refs pointing to the manifests to be validated. Each reference must be present in the "refs" subdirectory of the image. Only applicable if type is image or imageLayout.`,
)
return cmd
}
func (v *validateCmd) Run(cmd *cobra.Command, args []string) {
if len(args) < 1 {
v.stderr.Printf("no files specified")
if err := cmd.Usage(); err != nil {
v.stderr.Println(err)
}
os.Exit(1)
}
var exitcode int
for _, arg := range args {
err := v.validatePath(arg)
if err == nil {
v.stdout.Printf("%s: OK", arg)
continue
}
var errs []error
if verr, ok := errors.Cause(err).(schema.ValidationError); ok {
errs = verr.Errs
} else if serr, ok := errors.Cause(err).(*schema.SyntaxError); ok {
v.stderr.Printf("%s:%d:%d: validation failed: %v", arg, serr.Line, serr.Col, err)
exitcode = 1
continue
} else {
v.stderr.Printf("%s: validation failed: %v", arg, err)
exitcode = 1
continue
}
for _, err := range errs {
v.stderr.Printf("%s: validation failed: %v", arg, err)
}
exitcode = 1
}
os.Exit(exitcode)
}
func (v *validateCmd) validatePath(name string) error {
var (
err error
typ = v.typ
)
if typ == "" {
if typ, err = autodetect(name); err != nil {
return errors.Wrap(err, "unable to determine type")
}
}
switch typ {
case typeImageLayout:
return image.ValidateLayout(name, v.refs, v.stdout)
case typeImage:
return image.Validate(name, v.refs, v.stdout)
}
f, err := os.Open(name)
if err != nil {
return errors.Wrap(err, "unable to open file")
}
defer f.Close()
switch typ {
case typeManifest:
return schema.MediaTypeManifest.Validate(f)
case typeManifestList:
return schema.MediaTypeManifestList.Validate(f)
case typeConfig:
return schema.MediaTypeImageConfig.Validate(f)
}
return fmt.Errorf("type %q unimplemented", typ)
}
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