Add 'podman restart' command

Signed-off-by: Matthew Heon <matthew.heon@gmail.com>

Closes: #503
Approved by: rhatdan

1 files changed, 110 insertions, 0 deletions

diff --git a/cmd/podman/restart.go b/cmd/podman/restart.go
new file mode 100644
index 000000000..f96959a27
--- /dev/null
+++ b/cmd/podman/restart.go
@@ -0,0 +1,110 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/pkg/errors"
+	"github.com/projectatomic/libpod/libpod"
+	"github.com/urfave/cli"
+)
+
+var (
+	restartFlags = []cli.Flag{
+		cli.UintFlag{
+			Name:  "timeout, time, t",
+			Usage: "Seconds to wait for stop before killing the container",
+			Value: libpod.CtrRemoveTimeout,
+		},
+		LatestFlag,
+	}
+	restartDescription = `Restarts one or more running containers. The container ID or name can be used. A timeout before forcibly stopping can be set, but defaults to 10 seconds`
+
+	restartCommand = cli.Command{
+		Name:                   "restart",
+		Usage:                  "Restart one or more containers",
+		Description:            restartDescription,
+		Flags:                  restartFlags,
+		Action:                 restartCmd,
+		ArgsUsage:              "CONTAINER [CONTAINER ...]",
+		UseShortOptionHandling: true,
+	}
+)
+
+func restartCmd(c *cli.Context) error {
+	args := c.Args()
+	if len(args) < 1 && !c.Bool("latest") {
+		return errors.Wrapf(libpod.ErrInvalidArg, "you must provide at least one container name or ID")
+	}
+
+	if err := validateFlags(c, restartFlags); err != nil {
+		return err
+	}
+
+	runtime, err := getRuntime(c)
+	if err != nil {
+		return errors.Wrapf(err, "error creating libpod runtime")
+	}
+	defer runtime.Shutdown(false)
+
+	var lastError error
+
+	timeout := c.Uint("timeout")
+	useTimeout := c.IsSet("timeout")
+
+	// Handle --latest
+	if c.Bool("latest") {
+		lastCtr, err := runtime.GetLatestContainer()
+		if err != nil {
+			lastError = errors.Wrapf(err, "unable to get latest container")
+		} else {
+			lastError = restartCtr(timeout, useTimeout, lastCtr)
+		}
+	}
+
+	for _, id := range args {
+		ctr, err := runtime.LookupContainer(id)
+		if err != nil {
+			if lastError != nil {
+				fmt.Fprintln(os.Stderr, lastError)
+			}
+			lastError = errors.Wrapf(err, "unable to find container %s", id)
+			continue
+		}
+
+		if err := restartCtr(timeout, useTimeout, ctr); err != nil {
+			if lastError != nil {
+				fmt.Fprintln(os.Stderr, lastError)
+			}
+			lastError = errors.Wrapf(err, "error restarting container %s", ctr.ID())
+		}
+	}
+
+	return lastError
+}
+
+// Restart a single container
+func restartCtr(cliTimeout uint, useTimeout bool, ctr *libpod.Container) error {
+	timeout := ctr.StopTimeout()
+	if useTimeout {
+		timeout = cliTimeout
+	}
+
+	state, err := ctr.State()
+	if err != nil {
+		return err
+	}
+	if state == libpod.ContainerStateRunning {
+		if err := ctr.StopWithTimeout(timeout); err != nil {
+			return err
+		}
+	}
+
+	if err := ctr.Start(); err != nil {
+		return err
+	}
+
+	fmt.Printf("%s\n", ctr.ID())
+
+	return nil
+}