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package main
import (
"fmt"
"os"
"time"
"github.com/containers/libpod/cmd/podman/cliconfig"
"github.com/containers/libpod/cmd/podman/libpodruntime"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
var (
waitCommand cliconfig.WaitValues
waitDescription = `
podman wait
Block until one or more containers stop and then print their exit codes
`
_waitCommand = &cobra.Command{
Use: "wait [flags] CONTAINER [CONTAINER...]",
Short: "Block on one or more containers",
Long: waitDescription,
RunE: func(cmd *cobra.Command, args []string) error {
waitCommand.InputArgs = args
waitCommand.GlobalFlags = MainGlobalOpts
return waitCmd(&waitCommand)
},
Example: `podman wait --latest
podman wait --interval 5000 ctrID
podman wait ctrID1 ctrID2`,
}
)
func init() {
waitCommand.Command = _waitCommand
waitCommand.SetUsageTemplate(UsageTemplate())
flags := waitCommand.Flags()
flags.UintVarP(&waitCommand.Interval, "interval", "i", 250, "Milliseconds to wait before polling for completion")
flags.BoolVarP(&waitCommand.Latest, "latest", "l", false, "Act on the latest container podman is aware of")
markFlagHiddenForRemoteClient("latest", flags)
}
func waitCmd(c *cliconfig.WaitValues) error {
args := c.InputArgs
if len(args) < 1 && !c.Latest {
return errors.Errorf("you must provide at least one container name or id")
}
runtime, err := libpodruntime.GetRuntime(&c.PodmanCommand)
if err != nil {
return errors.Wrapf(err, "error creating libpod runtime")
}
defer runtime.Shutdown(false)
if err != nil {
return errors.Wrapf(err, "could not get config")
}
var lastError error
if c.Latest {
latestCtr, err := runtime.GetLatestContainer()
if err != nil {
return errors.Wrapf(err, "unable to wait on latest container")
}
args = append(args, latestCtr.ID())
}
for _, container := range args {
ctr, err := runtime.LookupContainer(container)
if err != nil {
return errors.Wrapf(err, "unable to find container %s", container)
}
if c.Interval == 0 {
return errors.Errorf("interval must be greater then 0")
}
returnCode, err := ctr.WaitWithInterval(time.Duration(c.Interval) * time.Millisecond)
if err != nil {
if lastError != nil {
fmt.Fprintln(os.Stderr, lastError)
}
lastError = errors.Wrapf(err, "failed to wait for the container %v", container)
} else {
fmt.Println(returnCode)
}
}
return lastError
}
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