Add version command

.goreleaser.yml

@@ -13,6 +13,11 @@ builds:
       - linux
       - windows
       - darwin
+    ldflags:
+      - -X github.com/lincolnloop/apppack/version.BuildDate={{ .Date }}
+      - -X github.com/lincolnloop/apppack/version.Version={{ .Version }}
+      - -X github.com/lincolnloop/apppack/version.Commit={{ .ShortCommit }}
+      - -X github.com/lincolnloop/apppack/version.Environment=production
 archives:
   - replacements:
       darwin: Darwin

cmd/version.go

@@ -0,0 +1,41 @@
+/*
+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/lincolnloop/apppack/version"
+	"github.com/spf13/cobra"
+)
+
+// versionCmd represents the version command
+var versionCmd = &cobra.Command{
+	Use:                   "version",
+	Short:                 "show the version of the apppack command",
+	DisableFlagsInUseLine: true,
+	Run: func(cmd *cobra.Command, args []string) {
+		if version.Environment != "production" {
+			fmt.Println(version.Environment)
+		} else {
+			fmt.Println(version.Version)
+		}
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(versionCmd)
+}

version/version.go

@@ -0,0 +1,8 @@
+package version
+
+import "time"
+
+var BuildDate = time.Now().String()
+var Version = "<version>"
+var Commit = "<commit>"
+var Environment = "development"