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

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package client
import (
"golang.org/x/net/context"
"io/ioutil"
"github.com/docker/docker/api/client/formatter"
Cli "github.com/docker/docker/cli"
"github.com/docker/docker/opts"
flag "github.com/docker/docker/pkg/mflag"
"github.com/docker/docker/utils/templates"
"github.com/docker/engine-api/types"
"github.com/docker/engine-api/types/filters"
)
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
}
// CmdPs outputs a list of Docker containers.
//
// Usage: docker ps [OPTIONS]
func (cli *DockerCli) CmdPs(args ...string) error {
var (
err error
psFilterArgs = filters.NewArgs()
cmd = Cli.Subcmd("ps", nil, Cli.DockerCommands["ps"].Description, true)
quiet = cmd.Bool([]string{"q", "-quiet"}, false, "Only display numeric IDs")
size = cmd.Bool([]string{"s", "-size"}, false, "Display total file sizes")
all = cmd.Bool([]string{"a", "-all"}, false, "Show all containers (default shows just running)")
noTrunc = cmd.Bool([]string{"-no-trunc"}, false, "Don't truncate output")
nLatest = cmd.Bool([]string{"l", "-latest"}, false, "Show the latest created container (includes all states)")
last = cmd.Int([]string{"n"}, -1, "Show n last created containers (includes all states)")
format = cmd.String([]string{"-format"}, "", "Pretty-print containers using a Go template")
flFilter = opts.NewListOpts(nil)
)
cmd.Require(flag.Exact, 0)
cmd.Var(&flFilter, []string{"f", "-filter"}, "Filter output based on conditions provided")
cmd.ParseFlags(args, true)
if *last == -1 && *nLatest {
*last = 1
}
// Consolidate all filter flags, and sanity check them.
// They'll get processed in the daemon/server.
for _, f := range flFilter.GetAll() {
if psFilterArgs, err = filters.ParseFlag(f, psFilterArgs); err != nil {
return err
}
}
options := types.ContainerListOptions{
All: *all,
Limit: *last,
Size: *size,
Filter: psFilterArgs,
}
pre := &preProcessor{opts: &options}
tmpl, err := templates.Parse(*format)
if err != nil {
return err
}
_ = tmpl.Execute(ioutil.Discard, pre)
containers, err := cli.client.ContainerList(context.Background(), options)
if err != nil {
return err
}
f := *format
if len(f) == 0 {
if len(cli.PsFormat()) > 0 && !*quiet {
f = cli.PsFormat()
} else {
f = "table"
}
}
psCtx := formatter.ContainerContext{
Context: formatter.Context{
Output: cli.out,
Format: f,
Quiet: *quiet,
Trunc: !*noTrunc,
},
Size: *size,
Containers: containers,
}
psCtx.Write()
return nil
}