swap 'pkg push' for 'pkg build --push', keeping 'pkg push' as deprecated but still working (#4141)

Signed-off-by: Avi Deitcher <avi@deitcher.net>

src/cmd/linuxkit/pkg.go

@@ -75,9 +75,11 @@ func pkgCmd() *cobra.Command {
 		},
 	}
 
-	cmd.AddCommand(pkgBuildCmd())
+	// because there is an alias 'pkg push' for 'pkg build --push', we need to add the build command first
+	buildCmd := pkgBuildCmd()
+	cmd.AddCommand(buildCmd)
 	cmd.AddCommand(pkgBuilderCmd())
-	cmd.AddCommand(pkgPushCmd())
+	cmd.AddCommand(pkgPushCmd(buildCmd))
 	cmd.AddCommand(pkgShowTagCmd())
 	cmd.AddCommand(pkgManifestCmd())
 	cmd.AddCommand(pkgRemoteTagCmd())

src/cmd/linuxkit/pkg_build.go

@@ -24,17 +24,17 @@ const (
 // pkg build --pull                    - builds unless is in cache or published in registry; pulls from registry if not in cache
 // pkg build --force                   - always builds even if is in cache or published in registry
 // pkg build --force --pull            - always builds even if is in cache or published in registry; --pull ignored
-// pkg push                    - always builds unless is in cache
+// pkg build --push 		           - always builds unless is in cache or published in registry; pushes to registry
-// pkg push --force            - always builds even if is in cache
+// pkg build --push --force            - always builds even if is in cache
-// pkg push --nobuild          - skips build; if not in cache, fails
+// pkg build --push --nobuild          - skips build; if not in cache, fails
-// pkg push --nobuild --force  - nonsensical
+// pkg build --push --nobuild --force  - nonsensical
+// pkg push                            - equivalent to pkg build --push
 
-// addCmdRunPkgBuildPush adds the RunE function and flags to a cobra.Command
+func pkgBuildCmd() *cobra.Command {
-// for "pkg build" or "pkg push".
-func addCmdRunPkgBuildPush(cmd *cobra.Command, withPush bool) *cobra.Command {
 	var (
 		force          bool
 		pull           bool
+		push           bool
 		ignoreCache    bool
 		docker         bool
 		platforms      string
@@ -53,8 +53,15 @@ func addCmdRunPkgBuildPush(cmd *cobra.Command, withPush bool) *cobra.Command {
 		progress       string
 		ssh            []string
 	)
-
+	cmd := &cobra.Command{
-	cmd.RunE = func(cmd *cobra.Command, args []string) error {
+		Use:   "build",
+		Short: "build an OCI package from a directory with a yaml configuration file",
+		Long: `Build an OCI package from a directory with a yaml configuration file.
+		'path' specifies the path to the package source directory.
+`,
+		Example: `  linuxkit pkg build [options] pkg/dir/`,
+		Args:    cobra.MinimumNArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
 			pkgs, err := pkglib.NewFromConfig(pkglibConfig, args...)
 			if err != nil {
 				return err
@@ -80,7 +87,7 @@ func addCmdRunPkgBuildPush(cmd *cobra.Command, withPush bool) *cobra.Command {
 
 			opts = append(opts, pkglib.WithBuildCacheDir(cacheDir.String()))
 
-		if withPush {
+			if push {
 				opts = append(opts, pkglib.WithBuildPush())
 				if nobuild {
 					opts = append(opts, pkglib.WithBuildSkip())
@@ -245,7 +252,7 @@ func addCmdRunPkgBuildPush(cmd *cobra.Command, withPush bool) *cobra.Command {
 
 				var msg, action string
 				switch {
-			case !withPush:
+				case !push:
 					msg = fmt.Sprintf("Building %q", p.Tag())
 					action = "building"
 				case nobuild:
@@ -263,10 +270,11 @@ func addCmdRunPkgBuildPush(cmd *cobra.Command, withPush bool) *cobra.Command {
 				}
 			}
 			return nil
+		},
 	}
-
 	cmd.Flags().BoolVar(&force, "force", false, "Force rebuild even if image is in local cache")
 	cmd.Flags().BoolVar(&pull, "pull", false, "Pull image if in registry but not in local cache; conflicts with --force")
+	cmd.Flags().BoolVar(&push, "push", false, "After building, if successful, push the image to the registry; if --nobuild is set, just push")
 	cmd.Flags().BoolVar(&ignoreCache, "ignore-cached", false, "Ignore cached intermediate images, always pulling from registry")
 	cmd.Flags().BoolVar(&docker, "docker", false, "Store the built image in the docker image cache instead of the default linuxkit cache")
 	cmd.Flags().StringVar(&platforms, "platforms", "", "Which platforms to build for, defaults to all of those for which the package can be built")
@@ -287,18 +295,6 @@ func addCmdRunPkgBuildPush(cmd *cobra.Command, withPush bool) *cobra.Command {
 
 	return cmd
 }
-func pkgBuildCmd() *cobra.Command {
-	cmd := &cobra.Command{
-		Use:   "build",
-		Short: "build an OCI package from a directory with a yaml configuration file",
-		Long: `Build an OCI package from a directory with a yaml configuration file.
-		'path' specifies the path to the package source directory.
-`,
-		Example: `  linuxkit pkg build [options] pkg/dir/`,
-		Args:    cobra.MinimumNArgs(1),
-	}
-	return addCmdRunPkgBuildPush(cmd, false)
-}
 
 func buildPlatformBuildersMap(inputs string, existing map[string]string) (map[string]string, error) {
 	if inputs == "" {

src/cmd/linuxkit/pkg_push.go

@@ -1,18 +1,35 @@
 package main
 
-import "github.com/spf13/cobra"
+import (
+	"fmt"
 
-func pkgPushCmd() *cobra.Command {
+	"github.com/spf13/cobra"
+)
+
+func pkgPushCmd(buildCmd *cobra.Command) *cobra.Command {
 	cmd := &cobra.Command{
 		Use:   "push",
-		Short: "build and push an OCI package from a directory with a yaml configuration file",
+		Short: "Alias for 'pkg build --push'",
 		Long: `Build and push an OCI package from a directory with a yaml configuration file.
 		'path' specifies the path to the package source directory.
 
 		The package may or may not be built first, depending on options
 `,
 		Example:    `  linuxkit pkg push [options] pkg/dir/`,
+		SuggestFor: []string{"build"},
 		Args:       cobra.MinimumNArgs(1),
+		Deprecated: "use 'pkg build --push' instead",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			// Create a copy of buildCmd with push=true
+			if err := buildCmd.Flags().Set("push", "true"); err != nil {
+				return fmt.Errorf("'pkg push' unable to set 'pkg build --push': %w", err)
 			}
-	return addCmdRunPkgBuildPush(cmd, true)
+
+			// Pass the args to the build command
+			buildCmd.SetArgs(args)
+			return buildCmd.RunE(buildCmd, args)
+		},
+	}
+	cmd.Flags().AddFlagSet(buildCmd.Flags())
+	return cmd
 }