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package main
import (
"fmt"
"io"
"os"
"strings"
"github.com/pkg/errors"
"github.com/projectatomic/buildah"
"github.com/projectatomic/libpod/cmd/podman/libpodruntime"
"github.com/projectatomic/libpod/libpod"
"github.com/projectatomic/libpod/libpod/image"
"github.com/projectatomic/libpod/pkg/util"
"github.com/urfave/cli"
)
var (
commitFlags = []cli.Flag{
cli.StringSliceFlag{
Name: "change, c",
Usage: "Apply the following possible instructions to the created image (default []): CMD | ENTRYPOINT | ENV | EXPOSE | LABEL | STOPSIGNAL | USER | VOLUME | WORKDIR",
},
cli.StringFlag{
Name: "format, f",
Usage: "`format` of the image manifest and metadata",
Value: "oci",
},
cli.StringFlag{
Name: "message, m",
Usage: "Set commit message for imported image",
},
cli.StringFlag{
Name: "author, a",
Usage: "Set the author for the image comitted",
},
cli.BoolTFlag{
Name: "pause, p",
Usage: "Pause container during commit",
},
cli.BoolFlag{
Name: "quiet, q",
Usage: "Suppress output",
},
}
commitDescription = `Create an image from a container's changes.
Optionally tag the image created, set the author with the --author flag,
set the commit message with the --message flag,
and make changes to the instructions with the --change flag.`
commitCommand = cli.Command{
Name: "commit",
Usage: "Create new image based on the changed container",
Description: commitDescription,
Flags: commitFlags,
Action: commitCmd,
ArgsUsage: "CONTAINER [REPOSITORY[:TAG]]",
}
)
func commitCmd(c *cli.Context) error {
if err := validateFlags(c, commitFlags); err != nil {
return err
}
runtime, err := libpodruntime.GetRuntime(c)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.Shutdown(false)
var (
writer io.Writer
mimeType string
)
args := c.Args()
if len(args) != 2 {
return errors.Errorf("you must provide a container name or ID and a target image name")
}
switch c.String("format") {
case "oci":
mimeType = buildah.OCIv1ImageManifest
if c.IsSet("message") {
return errors.Errorf("messages cannot be added to the OCIv1 image format.")
}
case "docker":
mimeType = buildah.Dockerv2ImageManifest
default:
return errors.Errorf("unrecognized image format %q", c.String("format"))
}
container := args[0]
reference := args[1]
if c.IsSet("change") {
for _, change := range c.StringSlice("change") {
splitChange := strings.Split(strings.ToUpper(change), "=")
if !util.StringInSlice(splitChange[0], []string{"CMD", "ENTRYPOINT", "ENV", "EXPOSE", "LABEL", "STOPSIGNAL", "USER", "VOLUME", "WORKDIR"}) {
return errors.Errorf("invalid syntax for --change ", change)
}
}
}
if !c.Bool("quiet") {
writer = os.Stderr
}
ctr, err := runtime.LookupContainer(container)
if err != nil {
return errors.Wrapf(err, "error looking up container %q", container)
}
sc := image.GetSystemContext(runtime.GetConfig().SignaturePolicyPath, "", false)
coptions := buildah.CommitOptions{
SignaturePolicyPath: runtime.GetConfig().SignaturePolicyPath,
ReportWriter: writer,
SystemContext: sc,
PreferredManifestType: mimeType,
}
options := libpod.ContainerCommitOptions{
CommitOptions: coptions,
Pause: c.Bool("pause"),
Message: c.String("message"),
Changes: c.StringSlice("change"),
Author: c.String("author"),
}
newImage, err := ctr.Commit(getContext(), reference, options)
if err != nil {
return err
}
fmt.Println(newImage.ID())
return nil
}
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