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package main
import (
"fmt"
"io"
"os"
"strings"
"github.com/containers/image/types"
"github.com/containers/libpod/cmd/podman/libpodruntime"
"github.com/containers/libpod/cmd/podman/shared"
"github.com/containers/libpod/libpod/image"
"github.com/containers/libpod/utils"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
)
var (
runlabelFlags = []cli.Flag{
cli.StringFlag{
Name: "authfile",
Usage: "Path of the authentication file. Default is ${XDG_RUNTIME_DIR}/containers/auth.json. Use REGISTRY_AUTH_FILE environment variable to override. ",
},
cli.BoolFlag{
Name: "display",
Usage: "preview the command that the label would run",
},
cli.StringFlag{
Name: "cert-dir",
Usage: "`pathname` of a directory containing TLS certificates and keys",
},
cli.StringFlag{
Name: "creds",
Usage: "`credentials` (USERNAME:PASSWORD) to use for authenticating to a registry",
},
cli.StringFlag{
Name: "name",
Usage: "Assign a name to the container",
},
cli.StringFlag{
Name: "opt1",
Usage: "Optional parameter to pass for install",
Hidden: true,
},
cli.StringFlag{
Name: "opt2",
Usage: "Optional parameter to pass for install",
Hidden: true,
},
cli.StringFlag{
Name: "opt3",
Usage: "Optional parameter to pass for install",
Hidden: true,
},
cli.BoolFlag{
Name: "quiet, q",
Usage: "Suppress output information when installing images",
},
cli.BoolFlag{
Name: "pull, p",
Usage: "pull the image if it does not exist locally prior to executing the label contents",
},
cli.StringFlag{
Name: "signature-policy",
Usage: "`pathname` of signature policy file (not usually used)",
},
cli.BoolTFlag{
Name: "tls-verify",
Usage: "require HTTPS and verify certificates when contacting registries (default: true)",
},
}
runlabelDescription = `
Executes a command as described by a container image label.
`
runlabelCommand = cli.Command{
Name: "runlabel",
Usage: "Execute the command described by an image label",
Description: runlabelDescription,
Flags: sortFlags(runlabelFlags),
Action: runlabelCmd,
ArgsUsage: "",
SkipArgReorder: true,
OnUsageError: usageErrorHandler,
}
)
// installCmd gets the data from the command line and calls installImage
// to copy an image from a registry to a local machine
func runlabelCmd(c *cli.Context) error {
var (
imageName string
stdErr, stdOut io.Writer
stdIn io.Reader
extraArgs []string
)
// Evil images could trick into recursively executing the runlabel
// command. Avoid this by setting the "PODMAN_RUNLABEL_NESTED" env
// variable when executing a label first.
nested := os.Getenv("PODMAN_RUNLABEL_NESTED")
if nested == "1" {
return fmt.Errorf("nested runlabel calls: runlabels cannot execute the runlabel command")
}
opts := make(map[string]string)
runtime, err := libpodruntime.GetRuntime(c)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.Shutdown(false)
args := c.Args()
if len(args) < 2 {
logrus.Errorf("the runlabel command requires at least 2 arguments: LABEL IMAGE")
return nil
}
if err := validateFlags(c, runlabelFlags); err != nil {
return err
}
if c.Bool("display") && c.Bool("quiet") {
return errors.Errorf("the display and quiet flags cannot be used together.")
}
if len(args) > 2 {
extraArgs = args[2:]
}
pull := c.Bool("pull")
label := args[0]
runlabelImage := args[1]
if c.IsSet("opt1") {
opts["opt1"] = c.String("opt1")
}
if c.IsSet("opt2") {
opts["opt2"] = c.String("opt2")
}
if c.IsSet("opt3") {
opts["opt3"] = c.String("opt3")
}
ctx := getContext()
stdErr = os.Stderr
stdOut = os.Stdout
stdIn = os.Stdin
if c.Bool("quiet") {
stdErr = nil
stdOut = nil
stdIn = nil
}
dockerRegistryOptions := image.DockerRegistryOptions{
DockerCertPath: c.String("cert-dir"),
}
if c.IsSet("tls-verify") {
dockerRegistryOptions.DockerInsecureSkipTLSVerify = types.NewOptionalBool(!c.BoolT("tls-verify"))
}
authfile := getAuthFile(c.String("authfile"))
runLabel, imageName, err := shared.GetRunlabel(label, runlabelImage, ctx, runtime, pull, c.String("creds"), dockerRegistryOptions, authfile, c.String("signature-policy"), stdOut)
if err != nil {
return err
}
if runLabel == "" {
return errors.Errorf("%s does not have a label of %s", runlabelImage, label)
}
cmd, env, err := shared.GenerateRunlabelCommand(runLabel, imageName, c.String("name"), opts, extraArgs)
if err != nil {
return err
}
if !c.Bool("quiet") {
fmt.Printf("Command: %s\n", strings.Join(cmd, " "))
if c.Bool("display") {
return nil
}
}
return utils.ExecCmdWithStdStreams(stdIn, stdOut, stdErr, env, cmd[0], cmd[1:]...)
}
|
