cli/command/container: don't depend on result.OSType

This field is set for the request as a whole, so can be obtained
from the server-info instead. Docker v29 will provide per-stats
information.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/command/container/stats.go

@@ -108,6 +108,9 @@ var acceptedStatsFilters = map[string]bool{
 func RunStats(ctx context.Context, dockerCLI command.Cli, options *StatsOptions) error {
 	apiClient := dockerCLI.Client()
 
+	// Get the daemonOSType to handle platform-specific stats fields.
+	daemonOSType = dockerCLI.ServerInfo().OSType
+
 	// waitFirst is a WaitGroup to wait first stat data's reach for each container
 	waitFirst := &sync.WaitGroup{}
 	// closeChan is a non-buffered channel used to collect errors from goroutines.
@@ -261,12 +264,6 @@ func RunStats(ctx context.Context, dockerCLI command.Cli, options *StatsOptions)
 			format = formatter.TableFormatKey
 		}
 	}
-	if daemonOSType == "" {
-		// Get the daemonOSType if not set already. The daemonOSType variable
-		// should already be set when collecting stats as part of "collect()",
-		// so we unlikely hit this code in practice.
-		daemonOSType = dockerCLI.ServerInfo().OSType
-	}
 
 	// Buffer to store formatted stats text.
 	// Once formatted, it will be printed in one write to avoid screen flickering.

cli/command/container/stats_helpers.go

@@ -95,8 +95,6 @@ func collect(ctx context.Context, s *Stats, cli client.ContainerAPIClient, strea
 				continue
 			}
 
-			daemonOSType = response.OSType
-
 			if daemonOSType != "windows" {
 				previousCPU = v.PreCPUStats.CPUUsage.TotalUsage
 				previousSystem = v.PreCPUStats.SystemUsage