[23.0 backport] docker ps: always use --quiet, also combined with --format

cli/command/container/list.go

@@ -120,6 +120,8 @@ func runPs(dockerCli command.Cli, options *psOptions) error {
 	if len(options.format) == 0 {
 		// load custom psFormat from CLI config (if any)
 		options.format = dockerCli.ConfigFile().PsFormat
+	} else if options.quiet {
+		_, _ = dockerCli.Err().Write([]byte("WARNING: Ignoring custom format, because both --format and --quiet are set.\n"))
 	}
 
 	listOptions, err := buildContainerListOptions(options)

cli/command/container/list_test.go

@@ -309,8 +309,22 @@ func TestContainerListWithFormat(t *testing.T) {
 			}, nil
 		},
 	})
-	cmd := newListCommand(cli)
-	cmd.Flags().Set("format", "{{ .Names }} {{ .Image }} {{ .Labels }}")
-	assert.NilError(t, cmd.Execute())
-	golden.Assert(t, cli.OutBuffer().String(), "container-list-with-format.golden")
+
+	t.Run("with format", func(t *testing.T) {
+		cli.OutBuffer().Reset()
+		cmd := newListCommand(cli)
+		assert.Check(t, cmd.Flags().Set("format", "{{ .Names }} {{ .Image }} {{ .Labels }}"))
+		assert.NilError(t, cmd.Execute())
+		golden.Assert(t, cli.OutBuffer().String(), "container-list-with-format.golden")
+	})
+
+	t.Run("with format and quiet", func(t *testing.T) {
+		cli.OutBuffer().Reset()
+		cmd := newListCommand(cli)
+		assert.Check(t, cmd.Flags().Set("format", "{{ .Names }} {{ .Image }} {{ .Labels }}"))
+		assert.Check(t, cmd.Flags().Set("quiet", "true"))
+		assert.NilError(t, cmd.Execute())
+		assert.Equal(t, cli.ErrBuffer().String(), "WARNING: Ignoring custom format, because both --format and --quiet are set.\n")
+		golden.Assert(t, cli.OutBuffer().String(), "container-list-quiet.golden")
+	})
 }

cli/command/container/testdata/container-list-quiet.golden

@@ -0,0 +1,2 @@
+container_id
+container_id

cli/command/formatter/container.go

@@ -55,6 +55,9 @@ ports: {{- pad .Ports 1 0}}
 		}
 		return Format(format)
 	default: // custom format
+		if quiet {
+			return DefaultQuietFormat
+		}
 		return Format(source)
 	}
 }

cli/command/formatter/container_test.go

@@ -163,7 +163,7 @@ containerID2   ubuntu    ""        24 hours ago                       foobar_bar
 		},
 		{
 			Context{Format: NewContainerFormat("table {{.Image}}", true, false)},
-			"IMAGE\nubuntu\nubuntu\n",
+			"containerID1\ncontainerID2\n",
 		},
 		{
 			Context{Format: NewContainerFormat("table", true, false)},