cli/command: remove AddPlatformFlag utility

It was only used internally and has no external users. It should not be
used for new uses, because it also adds a minimum API version constraint
and a default from env-var, which must be evaluated for each individual
use of such flags.

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

cli/command/container/create.go

@@ -86,7 +86,10 @@ func NewCreateCommand(dockerCli command.Cli) *cobra.Command {
 	// with hostname
 	flags.Bool("help", false, "Print usage")
 
-	command.AddPlatformFlag(flags, &options.platform)
+	// TODO(thaJeztah): consider adding platform as "image create option" on containerOptions
+	addPlatformFlag(flags, &options.platform)
+	_ = cmd.RegisterFlagCompletionFunc("platform", completion.Platforms)
+
 	flags.BoolVar(&options.untrusted, "disable-content-trust", !dockerCli.ContentTrustEnabled(), "Skip image verification")
 	copts = addFlags(flags)
 

cli/command/container/opts.go

@@ -141,6 +141,16 @@ type containerOptions struct {
 	Args  []string
 }
 
+// addPlatformFlag adds "--platform" to a set of flags for API version 1.32 and
+// later, using the value of "DOCKER_DEFAULT_PLATFORM" (if set) as a default.
+//
+// It should not be used for new uses, which may have a different API version
+// requirement.
+func addPlatformFlag(flags *pflag.FlagSet, target *string) {
+	flags.StringVar(target, "platform", os.Getenv("DOCKER_DEFAULT_PLATFORM"), "Set platform if server is multi-platform capable")
+	_ = flags.SetAnnotation("platform", "version", []string{"1.32"})
+}
+
 // addFlags adds all command line flags that will be used by parse to the FlagSet
 func addFlags(flags *pflag.FlagSet) *containerOptions {
 	copts := &containerOptions{

cli/command/container/run.go

@@ -66,7 +66,8 @@ func NewRunCommand(dockerCli command.Cli) *cobra.Command {
 	// with hostname
 	flags.Bool("help", false, "Print usage")
 
-	command.AddPlatformFlag(flags, &options.platform)
+	// TODO(thaJeztah): consider adding platform as "image create option" on containerOptions
+	addPlatformFlag(flags, &options.platform)
 	flags.BoolVar(&options.untrusted, "disable-content-trust", !dockerCli.ContentTrustEnabled(), "Skip image verification")
 	copts = addFlags(flags)
 

cli/command/image/import.go

@@ -47,7 +47,7 @@ func NewImportCommand(dockerCli command.Cli) *cobra.Command {
 	options.changes = dockeropts.NewListOpts(nil)
 	flags.VarP(&options.changes, "change", "c", "Apply Dockerfile instruction to the created image")
 	flags.StringVarP(&options.message, "message", "m", "", "Set commit message for imported image")
-	command.AddPlatformFlag(flags, &options.platform)
+	addPlatformFlag(flags, &options.platform)
 	_ = cmd.RegisterFlagCompletionFunc("platform", completion.Platforms)
 
 	return cmd

cli/command/image/opts.go

@@ -0,0 +1,17 @@
+package image
+
+import (
+	"os"
+
+	"github.com/spf13/pflag"
+)
+
+// addPlatformFlag adds "--platform" to a set of flags for API version 1.32 and
+// later, using the value of "DOCKER_DEFAULT_PLATFORM" (if set) as a default.
+//
+// It should not be used for new uses, which may have a different API version
+// requirement.
+func addPlatformFlag(flags *pflag.FlagSet, target *string) {
+	flags.StringVar(target, "platform", os.Getenv("DOCKER_DEFAULT_PLATFORM"), "Set platform if server is multi-platform capable")
+	_ = flags.SetAnnotation("platform", "version", []string{"1.32"})
+}

cli/command/image/pull.go

@@ -50,7 +50,7 @@ func NewPullCommand(dockerCli command.Cli) *cobra.Command {
 	flags.BoolVarP(&opts.all, "all-tags", "a", false, "Download all tagged images in the repository")
 	flags.BoolVarP(&opts.quiet, "quiet", "q", false, "Suppress verbose output")
 
-	command.AddPlatformFlag(flags, &opts.platform)
+	addPlatformFlag(flags, &opts.platform)
 	flags.BoolVar(&opts.untrusted, "disable-content-trust", !dockerCli.ContentTrustEnabled(), "Skip image verification")
 
 	_ = cmd.RegisterFlagCompletionFunc("platform", completion.Platforms)

cli/command/utils.go

@@ -11,7 +11,6 @@ import (
 	"github.com/docker/cli/cli/config"
 	"github.com/moby/moby/api/types/filters"
 	"github.com/pkg/errors"
-	"github.com/spf13/pflag"
 )
 
 // PruneFilters merges prune filters specified in config.json with those specified
@@ -55,12 +54,6 @@ func PruneFilters(dockerCLI config.Provider, pruneFilters filters.Args) filters.
 	return pruneFilters
 }
 
-// AddPlatformFlag adds `platform` to a set of flags for API version 1.32 and later.
-func AddPlatformFlag(flags *pflag.FlagSet, target *string) {
-	flags.StringVar(target, "platform", os.Getenv("DOCKER_DEFAULT_PLATFORM"), "Set platform if server is multi-platform capable")
-	_ = flags.SetAnnotation("platform", "version", []string{"1.32"})
-}
-
 // ValidateOutputPath validates the output paths of the "docker cp" command.
 func ValidateOutputPath(path string) error {
 	dir := filepath.Dir(filepath.Clean(path))