DockerCLI/cli/command/container/rm_test.go

47 lines
1.2 KiB
Go
Raw Normal View History

Return zero exit-code when force-removing non-existing containers When using `docker rm` / `docker container rm` with the `-f` / `--force` option, attempts to remove non-existing containers should print a warning, but should return a zero exit code ("successful"). Currently, a non-zero exit code is returned, marking the removal as "failed"; $ docker rm -fv 798c9471b695 Error: No such container: 798c9471b695 $ echo $? 1 The command should match the behavior of `rm` / `rm -f`, with the exception that a warning is printed (instead of silently ignored): Running `rm` with `-f` silences output and returns a zero exit code: touch some-file && rm -f no-such-file some-file; echo exit code: $?; ls -la # exit code: 0 # total 0 # drwxr-xr-x 2 sebastiaan staff 64 Aug 14 12:17 . # drwxr-xr-x 199 sebastiaan staff 6368 Aug 14 12:13 .. mkdir some-directory && rm -rf no-such-directory some-directory; echo exit code: $?; ls -la # exit code: 0 # total 0 # drwxr-xr-x 2 sebastiaan staff 64 Aug 14 12:17 . # drwxr-xr-x 199 sebastiaan staff 6368 Aug 14 12:13 .. Note that other reasons for a delete to fail should still result in a non-zero exit code, matching the behavior of `rm`. For instance, in the example below, the `rm` failed because directories can only be removed if the `-r` option is used; touch some-file && mkdir some-directory && rm -f some-directory no-such-file some-file; echo exit code: $?; ls -la # rm: some-directory: is a directory # exit code: 1 # total 0 # drwxr-xr-x 3 sebastiaan staff 96 Aug 14 14:15 . # drwxr-xr-x 199 sebastiaan staff 6368 Aug 14 12:13 .. # drwxr-xr-x 2 sebastiaan staff 64 Aug 14 14:15 some-directory This patch updates the `docker rm` / `docker container rm` command to not produce an error when attempting to remove a missing containers, and instead only print the error, but return a zero (0) exit code. With this patch applied: docker create --name mycontainer busybox \ && docker rm nosuchcontainer mycontainer; \ echo exit code: $?; \ docker ps -a --filter name=mycontainer # df23cc8573f00e97d6e948b48d9ea7d75ce3b4faaab4fe1d3458d3bfa451f39d # mycontainer # Error: No such container: nosuchcontainer # exit code: 0 # CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2020-08-14 10:04:32 -04:00
package container
import (
"context"
"fmt"
"io/ioutil"
"sort"
"testing"
"github.com/docker/cli/internal/test"
"github.com/docker/docker/api/types"
"github.com/docker/docker/errdefs"
"gotest.tools/v3/assert"
)
func TestRemoveForce(t *testing.T) {
var removed []string
cli := test.NewFakeCli(&fakeClient{
containerRemoveFunc: func(ctx context.Context, container string, options types.ContainerRemoveOptions) error {
removed = append(removed, container)
if container == "nosuchcontainer" {
return errdefs.NotFound(fmt.Errorf("Error: No such container: " + container))
}
return nil
},
Version: "1.36",
})
cmd := NewRmCommand(cli)
cmd.SetOut(ioutil.Discard)
t.Run("without force", func(t *testing.T) {
cmd.SetArgs([]string{"nosuchcontainer", "mycontainer"})
removed = []string{}
assert.ErrorContains(t, cmd.Execute(), "No such container")
sort.Strings(removed)
assert.DeepEqual(t, removed, []string{"mycontainer", "nosuchcontainer"})
})
t.Run("with force", func(t *testing.T) {
cmd.SetArgs([]string{"--force", "nosuchcontainer", "mycontainer"})
removed = []string{}
assert.NilError(t, cmd.Execute())
sort.Strings(removed)
assert.DeepEqual(t, removed, []string{"mycontainer", "nosuchcontainer"})
})
}