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moby--moby/api/client/container/ps.go

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package container
import (
"golang.org/x/net/context"
"github.com/docker/docker/api/client"
"github.com/docker/docker/api/client/formatter"
"github.com/docker/docker/cli"
"github.com/docker/engine-api/types"
"github.com/docker/engine-api/types/filters"
"github.com/docker/docker/utils/templates"
"github.com/spf13/cobra"
"io/ioutil"
)
type psOptions struct {
quiet bool
size bool
all bool
noTrunc bool
nLatest bool
last int
format string
filter []string
}
type preProcessor struct {
opts *types.ContainerListOptions
}
// Size sets the size option when called by a template execution.
func (p *preProcessor) Size() bool {
p.opts.Size = true
return true
}
// NewPsCommand creates a new cobra.Command for `docker ps`
func NewPsCommand(dockerCli *client.DockerCli) *cobra.Command {
var opts psOptions
cmd := &cobra.Command{
Use: "ps [OPTIONS]",
Short: "List containers",
Args: cli.ExactArgs(0),
RunE: func(cmd *cobra.Command, args []string) error {
return runPs(dockerCli, &opts)
},
}
flags := cmd.Flags()
flags.BoolVarP(&opts.quiet, "quiet", "q", false, "Only display numeric IDs")
flags.BoolVarP(&opts.size, "size", "s", false, "Display total file sizes")
flags.BoolVarP(&opts.all, "all", "a", false, "Show all containers (default shows just running)")
flags.BoolVar(&opts.noTrunc, "no-trunc", false, "Don't truncate output")
flags.BoolVarP(&opts.nLatest, "latest", "l", false, "Show the latest created container (includes all states)")
flags.IntVarP(&opts.last, "last", "n", -1, "Show n last created containers (includes all states)")
flags.StringVarP(&opts.format, "format", "", "", "Pretty-print containers using a Go template")
flags.StringSliceVarP(&opts.filter, "filter", "f", []string{}, "Filter output based on conditions provided")
return cmd
}
func runPs(dockerCli *client.DockerCli, opts *psOptions) error {
ctx := context.Background()
if opts.nLatest && opts.last == -1 {
opts.last = 1
}
containerFilterArgs := filters.NewArgs()
for _, f := range opts.filter {
var err error
containerFilterArgs, err = filters.ParseFlag(f, containerFilterArgs)
if err != nil {
return err
}
}
options := types.ContainerListOptions{
All: opts.all,
Limit: opts.last,
Size: opts.size,
Filter: containerFilterArgs,
}
pre := &preProcessor{opts: &options}
tmpl, err := templates.Parse(opts.format)
if err != nil {
return err
}
_ = tmpl.Execute(ioutil.Discard, pre)
containers, err := dockerCli.Client().ContainerList(ctx, options)
if err != nil {
return err
}
f := opts.format
if len(f) == 0 {
if len(dockerCli.PsFormat()) > 0 && !opts.quiet {
f = dockerCli.PsFormat()
} else {
f = "table"
}
}
psCtx := formatter.ContainerContext{
Context: formatter.Context{
Output: dockerCli.Out(),
Format: f,
Quiet: opts.quiet,
Trunc: !opts.noTrunc,
},
Size: opts.size,
Containers: containers,
}
psCtx.Write()
return nil
}