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|
package main
import (
"encoding/json"
"fmt"
"os"
"regexp"
"text/template"
"github.com/containers/buildah"
buildahcli "github.com/containers/buildah/pkg/cli"
"github.com/containers/buildah/pkg/parse"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"golang.org/x/crypto/ssh/terminal"
)
const (
inspectTypeContainer = "container"
inspectTypeImage = "image"
inspectTypeManifest = "manifest"
)
type inspectResults struct {
format string
inspectType string
}
func init() {
var (
opts inspectResults
inspectDescription = "\n Inspects a build container's or built image's configuration."
)
inspectCommand := &cobra.Command{
Use: "inspect",
Short: "Inspect the configuration of a container or image",
Long: inspectDescription,
RunE: func(cmd *cobra.Command, args []string) error {
return inspectCmd(cmd, args, opts)
},
Example: `buildah inspect containerID
buildah inspect --type image imageID
buildah inspect --format '{{.OCIv1.Config.Env}}' alpine`,
}
inspectCommand.SetUsageTemplate(UsageTemplate())
flags := inspectCommand.Flags()
flags.SetInterspersed(false)
flags.StringVarP(&opts.format, "format", "f", "", "use `format` as a Go template to format the output")
flags.StringVarP(&opts.inspectType, "type", "t", inspectTypeContainer, "look at the item of the specified `type` (container or image) and name")
rootCmd.AddCommand(inspectCommand)
}
func inspectCmd(c *cobra.Command, args []string, iopts inspectResults) error {
var builder *buildah.Builder
if len(args) == 0 {
return errors.Errorf("container or image name must be specified")
}
if err := buildahcli.VerifyFlagsArgsOrder(args); err != nil {
return err
}
if len(args) > 1 {
return errors.Errorf("too many arguments specified")
}
systemContext, err := parse.SystemContextFromOptions(c)
if err != nil {
return errors.Wrapf(err, "error building system context")
}
name := args[0]
store, err := getStore(c)
if err != nil {
return err
}
ctx := getContext()
switch iopts.inspectType {
case inspectTypeContainer:
builder, err = openBuilder(ctx, store, name)
if err != nil {
if c.Flag("type").Changed {
return errors.Wrapf(err, "error reading build container")
}
builder, err = openImage(ctx, systemContext, store, name)
if err != nil {
if manifestErr := manifestInspect(ctx, store, systemContext, name); manifestErr == nil {
return nil
}
return err
}
}
case inspectTypeImage:
builder, err = openImage(ctx, systemContext, store, name)
if err != nil {
return err
}
case inspectTypeManifest:
return manifestInspect(ctx, store, systemContext, name)
default:
return errors.Errorf("the only recognized types are %q and %q", inspectTypeContainer, inspectTypeImage)
}
out := buildah.GetBuildInfo(builder)
if iopts.format != "" {
format := iopts.format
if matched, err := regexp.MatchString("{{.*}}", format); err != nil {
return errors.Wrapf(err, "error validating format provided: %s", format)
} else if !matched {
return errors.Errorf("error invalid format provided: %s", format)
}
t, err := template.New("format").Parse(format)
if err != nil {
return errors.Wrapf(err, "Template parsing error")
}
if err = t.Execute(os.Stdout, out); err != nil {
return err
}
if terminal.IsTerminal(int(os.Stdout.Fd())) {
fmt.Println()
}
return nil
}
enc := json.NewEncoder(os.Stdout)
enc.SetIndent("", " ")
if terminal.IsTerminal(int(os.Stdout.Fd())) {
enc.SetEscapeHTML(false)
}
return enc.Encode(out)
}
|
