cli/command/container: add shell completion for --platform flags

With this patch, completion is provided for `--platform` flags:

    docker run --platform<TAB>
    linux           linux/amd64     linux/arm/v5    linux/arm/v7    linux/arm64/v8  linux/riscv64   wasip1          windows
    linux/386       linux/arm       linux/arm/v6    linux/arm64     linux/ppc64le   linux/s390x     wasip1/wasm     windows/amd64

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

Author: thaJeztah

cli/command/container/create.go

@@ -83,6 +83,7 @@ func NewCreateCommand(dockerCli command.Cli) *cobra.Command {
 	_ = cmd.RegisterFlagCompletionFunc("env", completion.EnvVarNames)
 	_ = cmd.RegisterFlagCompletionFunc("env-file", completion.FileNames)
 	_ = cmd.RegisterFlagCompletionFunc("network", completion.NetworkNames(dockerCli))
+	_ = cmd.RegisterFlagCompletionFunc("platform", completion.Platforms)
 	_ = cmd.RegisterFlagCompletionFunc("pull", completion.FromList(PullImageAlways, PullImageMissing, PullImageNever))
 	_ = cmd.RegisterFlagCompletionFunc("restart", completeRestartPolicies)
 	_ = cmd.RegisterFlagCompletionFunc("stop-signal", completeSignals)

cli/command/container/run.go

@@ -74,6 +74,7 @@ func NewRunCommand(dockerCli command.Cli) *cobra.Command {
 	_ = cmd.RegisterFlagCompletionFunc("env", completion.EnvVarNames)
 	_ = cmd.RegisterFlagCompletionFunc("env-file", completion.FileNames)
 	_ = cmd.RegisterFlagCompletionFunc("network", completion.NetworkNames(dockerCli))
+	_ = cmd.RegisterFlagCompletionFunc("platform", completion.Platforms)
 	_ = cmd.RegisterFlagCompletionFunc("pull", completion.FromList(PullImageAlways, PullImageMissing, PullImageNever))
 	_ = cmd.RegisterFlagCompletionFunc("restart", completeRestartPolicies)
 	_ = cmd.RegisterFlagCompletionFunc("stop-signal", completeSignals)