list.go

package main

import (
	"context"
	"flag"
	"fmt"
	"os"
	"text/tabwriter"
	"time"

	"github.com/containerd/containerd/namespaces"
	units "github.com/docker/go-units"
	"github.com/genuinetools/img/client"
	"github.com/moby/buildkit/identity"
	"github.com/moby/buildkit/session"
)

const listHelp = `List images and digests.`

func (cmd *listCommand) Name() string      { return "ls" }
func (cmd *listCommand) Args() string      { return "[OPTIONS]" }
func (cmd *listCommand) ShortHelp() string { return listHelp }
func (cmd *listCommand) LongHelp() string  { return listHelp }
func (cmd *listCommand) Hidden() bool      { return false }

func (cmd *listCommand) Register(fs *flag.FlagSet) {
	fs.Var(&cmd.filters, "f", "Filter output based on conditions provided")
	fs.Var(&cmd.filters, "filter", "Filter output based on conditions provided")
}

type listCommand struct {
	filters stringSlice
}

func (cmd *listCommand) Run(ctx context.Context, args []string) (err error) {
	reexec()

	// Create the context.
	id := identity.NewID()
	ctx = session.NewContext(ctx, id)
	ctx = namespaces.WithNamespace(ctx, "buildkit")

	// Create the client.
	c, err := client.New(stateDir, backend, nil)
	if err != nil {
		return err
	}
	defer c.Close()

	images, err := c.ListImages(ctx, cmd.filters...)
	if err != nil {
		return err
	}

	tw := tabwriter.NewWriter(os.Stdout, 1, 8, 1, '\t', 0)

	fmt.Fprintln(tw, "NAME\tSIZE\tCREATED AT\tUPDATED AT\tDIGEST")

	for _, image := range images {
		fmt.Fprintf(tw, "%s\t%s\t%s\t%s\t%s\n",
			image.Name,
			units.BytesSize(float64(image.ContentSize)),
			units.HumanDuration(time.Now().UTC().Sub(image.CreatedAt))+" ago",
			units.HumanDuration(time.Now().UTC().Sub(image.UpdatedAt))+" ago",
			image.Target.Digest,
		)
	}

	tw.Flush()

	return nil
}