feat: add basic kusiom mod cmd (#905)

pkg/cmd/cmd.go

@@ -12,6 +12,7 @@ import (
 	"kusionstack.io/kusion/pkg/cmd/apply"
 	"kusionstack.io/kusion/pkg/cmd/build"
 	cmdinit "kusionstack.io/kusion/pkg/cmd/init"
+	"kusionstack.io/kusion/pkg/cmd/mod"
 	"kusionstack.io/kusion/pkg/cmd/workspace"
 
 	"kusionstack.io/kusion/pkg/cmd/destroy"
@@ -103,6 +104,12 @@ func NewKusionctlCmd(o KusionctlOptions) *cobra.Command {
 				destroy.NewCmdDestroy(),
 			},
 		},
+		{
+			Message: "Module Management Commands:",
+			Commands: []*cobra.Command{
+				mod.NewCmdMod(o.IOStreams),
+			},
+		},
 	}
 	groups.Add(cmds)
 

pkg/cmd/mod/mod.go

@@ -0,0 +1,31 @@
+package mod
+
+import (
+	"github.com/spf13/cobra"
+	"k8s.io/cli-runtime/pkg/genericclioptions"
+
+	cmdutil "kusionstack.io/kusion/pkg/cmd/util"
+	"kusionstack.io/kusion/pkg/util/i18n"
+)
+
+var modLong = i18n.T(`
+		Commands for managing Kusion modules.
+
+		These commands help you manage the lifecycle of Kusion modules.`)
+
+// NewCmdMod returns an initialized Command instance for 'mod' sub command
+func NewCmdMod(streams genericclioptions.IOStreams) *cobra.Command {
+	cmd := &cobra.Command{
+		Use:                   "mod SUBCOMMAND",
+		DisableFlagsInUseLine: true,
+		Short:                 "Manage Kusion modules",
+		Long:                  modLong,
+		Run:                   cmdutil.DefaultSubCommandRun(streams.ErrOut),
+	}
+
+	// add subcommands
+	cmd.AddCommand(NewCmdInit(streams))
+	cmd.AddCommand(NewCmdPush(streams))
+
+	return cmd
+}

pkg/cmd/mod/mod_init.go

@@ -0,0 +1,28 @@
+package mod
+
+import (
+	"github.com/spf13/cobra"
+	"k8s.io/cli-runtime/pkg/genericclioptions"
+)
+
+type InitModOptions struct{}
+
+var (
+	initLong    = ``
+	initExample = ``
+)
+
+// NewCmdInit returns an initialized Command instance for the 'mod init' sub command
+func NewCmdInit(streams genericclioptions.IOStreams) *cobra.Command {
+	cmd := &cobra.Command{
+		Use:                   "",
+		DisableFlagsInUseLine: true,
+		Short:                 "",
+		Long:                  initLong,
+		Example:               initExample,
+		Run: func(cmd *cobra.Command, args []string) {
+		},
+	}
+
+	return cmd
+}

pkg/cmd/mod/mod_push.go

@@ -0,0 +1,28 @@
+package mod
+
+import (
+	"github.com/spf13/cobra"
+	"k8s.io/cli-runtime/pkg/genericclioptions"
+)
+
+type PushModOptions struct{}
+
+var (
+	pushLong    = ``
+	pushExample = ``
+)
+
+// NewCmdPush returns an initialized Command instance for the 'mod push' sub command
+func NewCmdPush(streams genericclioptions.IOStreams) *cobra.Command {
+	cmd := &cobra.Command{
+		Use:                   "",
+		DisableFlagsInUseLine: true,
+		Short:                 "",
+		Long:                  pushLong,
+		Example:               pushExample,
+		Run: func(cmd *cobra.Command, args []string) {
+		},
+	}
+
+	return cmd
+}

pkg/cmd/util/helpers.go

@@ -2,6 +2,11 @@ package util
 
 import (
 	"errors"
+	"fmt"
+	"io"
+	"strings"
+
+	"github.com/spf13/cobra"
 )
 
 func RecoverErr(err *error) {
@@ -17,8 +22,35 @@ func RecoverErr(err *error) {
 	}
 }
 
+// ErrExit may be passed to CheckError to instruct it to output nothing but exit with
+// status code 1.
+var ErrExit = fmt.Errorf("exit")
+
 func CheckErr(err error) {
 	if err != nil {
 		panic(err)
 	}
 }
+
+func UsageErrorf(cmd *cobra.Command, format string, args ...interface{}) error {
+	msg := fmt.Sprintf(format, args...)
+	return fmt.Errorf("%s\nSee '%s -h' for help and examples", msg, cmd.CommandPath())
+}
+
+// RequireNoArguments exits with a usage error if extra arguments are provided.
+func RequireNoArguments(c *cobra.Command, args []string) {
+	if len(args) > 0 {
+		CheckErr(UsageErrorf(c, "unknown command %q", strings.Join(args, " ")))
+	}
+}
+
+// DefaultSubCommandRun prints a command's help string to the specified output if no
+// arguments (sub-commands) are provided, or a usage error otherwise.
+func DefaultSubCommandRun(out io.Writer) func(c *cobra.Command, args []string) {
+	return func(c *cobra.Command, args []string) {
+		c.SetOut(out)
+		RequireNoArguments(c, args)
+		c.Help()
+		CheckErr(ErrExit)
+	}
+}