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package main
import (
"context"
"os"
"github.com/containers/image/copy"
"github.com/containers/image/signature"
"github.com/containers/image/storage"
"github.com/containers/image/transports/alltransports"
"github.com/containers/image/types"
sstorage "github.com/containers/storage"
"github.com/containers/storage/pkg/reexec"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
)
func main() {
if reexec.Init() {
return
}
app := cli.NewApp()
app.Name = "copyimg"
app.Usage = "barebones image copier"
app.Version = "0.0.1"
app.Flags = []cli.Flag{
cli.BoolFlag{
Name: "debug",
Usage: "turn on debug logging",
},
cli.StringFlag{
Name: "root",
Usage: "graph root directory",
},
cli.StringFlag{
Name: "runroot",
Usage: "run root directory",
},
cli.StringFlag{
Name: "storage-driver",
Usage: "storage driver",
},
cli.StringSliceFlag{
Name: "storage-opt",
Usage: "storage option",
},
cli.StringFlag{
Name: "signature-policy",
Usage: "signature policy",
},
cli.StringFlag{
Name: "image-name",
Usage: "set image name",
},
cli.StringFlag{
Name: "add-name",
Usage: "name to add to image",
},
cli.StringFlag{
Name: "import-from",
Usage: "import source",
},
cli.StringFlag{
Name: "export-to",
Usage: "export target",
},
}
app.Action = func(c *cli.Context) error {
var store sstorage.Store
var ref, importRef, exportRef types.ImageReference
var err error
debug := c.GlobalBool("debug")
rootDir := c.GlobalString("root")
runrootDir := c.GlobalString("runroot")
storageDriver := c.GlobalString("storage-driver")
storageOptions := c.GlobalStringSlice("storage-opt")
signaturePolicy := c.GlobalString("signature-policy")
imageName := c.GlobalString("image-name")
addName := c.GlobalString("add-name")
importFrom := c.GlobalString("import-from")
exportTo := c.GlobalString("export-to")
if debug {
logrus.SetLevel(logrus.DebugLevel)
} else {
logrus.SetLevel(logrus.ErrorLevel)
}
if imageName != "" {
if rootDir == "" && runrootDir != "" {
logrus.Errorf("must set --root and --runroot, or neither")
os.Exit(1)
}
if rootDir != "" && runrootDir == "" {
logrus.Errorf("must set --root and --runroot, or neither")
os.Exit(1)
}
storeOptions := sstorage.DefaultStoreOptions
if rootDir != "" && runrootDir != "" {
storeOptions.GraphDriverName = storageDriver
storeOptions.GraphDriverOptions = storageOptions
storeOptions.GraphRoot = rootDir
storeOptions.RunRoot = runrootDir
}
store, err = sstorage.GetStore(storeOptions)
if err != nil {
logrus.Errorf("error opening storage: %v", err)
os.Exit(1)
}
defer func() {
_, _ = store.Shutdown(false)
}()
storage.Transport.SetStore(store)
ref, err = storage.Transport.ParseStoreReference(store, imageName)
if err != nil {
logrus.Errorf("error parsing image name: %v", err)
os.Exit(1)
}
}
systemContext := types.SystemContext{
SignaturePolicyPath: signaturePolicy,
}
policy, err := signature.DefaultPolicy(&systemContext)
if err != nil {
logrus.Errorf("error loading signature policy: %v", err)
os.Exit(1)
}
policyContext, err := signature.NewPolicyContext(policy)
if err != nil {
logrus.Errorf("error loading signature policy: %v", err)
os.Exit(1)
}
defer func() {
_ = policyContext.Destroy()
}()
options := ©.Options{}
if importFrom != "" {
importRef, err = alltransports.ParseImageName(importFrom)
if err != nil {
logrus.Errorf("error parsing image name %v: %v", importFrom, err)
os.Exit(1)
}
}
if exportTo != "" {
exportRef, err = alltransports.ParseImageName(exportTo)
if err != nil {
logrus.Errorf("error parsing image name %v: %v", exportTo, err)
os.Exit(1)
}
}
ctx := context.TODO()
if imageName != "" {
if importFrom != "" {
err = copy.Image(ctx, policyContext, ref, importRef, options)
if err != nil {
logrus.Errorf("error importing %s: %v", importFrom, err)
os.Exit(1)
}
}
if addName != "" {
destImage, err1 := storage.Transport.GetStoreImage(store, ref)
if err1 != nil {
logrus.Errorf("error finding image: %v", err1)
os.Exit(1)
}
names := append(destImage.Names, imageName, addName)
err = store.SetNames(destImage.ID, names)
if err != nil {
logrus.Errorf("error adding name to %s: %v", imageName, err)
os.Exit(1)
}
}
if exportTo != "" {
err = copy.Image(ctx, policyContext, exportRef, ref, options)
if err != nil {
logrus.Errorf("error exporting %s: %v", exportTo, err)
os.Exit(1)
}
}
} else {
if importFrom != "" && exportTo != "" {
err = copy.Image(ctx, policyContext, exportRef, importRef, options)
if err != nil {
logrus.Errorf("error copying %s to %s: %v", importFrom, exportTo, err)
os.Exit(1)
}
}
}
return nil
}
if err := app.Run(os.Args); err != nil {
logrus.Fatal(err)
}
}
|
