feat: support cli version

.gitignore

@@ -1,2 +1,3 @@
 .idea/
-dist
+dist
+.DS_Store

.goreleaser.yml

@@ -1,5 +1,6 @@
 # This is an example .goreleaser.yml file with some sane defaults.
 # Make sure to check the documentation at http://goreleaser.com
+project_name: cli
 before:
   hooks:
     # You may remove this if you don't use go modules.
@@ -14,6 +15,8 @@ builds:
       - linux
       - windows
       - darwin
+    ldflags:
+      - -X cmd.version={{.Version}}
 
 archives:
   - replacements:

cmd/upgrade.go

@@ -0,0 +1,45 @@
+/*
+Copyright © 2021 NAME HERE <EMAIL ADDRESS>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+// upgradeCmd represents the upgrade command
+var upgradeCmd = &cobra.Command{
+	Use:   "upgrade",
+	Short: "upgrade cli to latest version",
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println("upgrade called")
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(upgradeCmd)
+
+	// Here you will define your flags and configuration settings.
+
+	// Cobra supports Persistent Flags which will work for this command
+	// and all subcommands, e.g.:
+	// upgradeCmd.PersistentFlags().String("foo", "", "A help for foo")
+
+	// Cobra supports local flags which will only run when this command
+	// is called directly, e.g.:
+	// upgradeCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}

cmd/version.go

@@ -0,0 +1,48 @@
+/*
+Copyright © 2021 NAME HERE <EMAIL ADDRESS>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+var version string
+
+// versionCmd represents the version command
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: "print current cli version",
+	Long:  `usage 'lets version' or 'lets --version'`,
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Printf("current version: %s", version)
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(versionCmd)
+
+	// Here you will define your flags and configuration settings.
+
+	// Cobra supports Persistent Flags which will work for this command
+	// and all subcommands, e.g.:
+	// versionCmd.PersistentFlags().String("foo", "", "A help for foo")
+
+	// Cobra supports local flags which will only run when this command
+	// is called directly, e.g.:
+	// versionCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}