feat: initial CLI framework

Fixes #2

cmd/cardano-up/main.go

@@ -15,15 +15,36 @@
 package main
 
 import (
-	"fmt"
+	"os"
 
-	"github.com/blinklabs-io/cardano-up/internal/version"
+	"github.com/spf13/cobra"
 )
 
 const (
 	programName = "cardano-up"
 )
 
 func main() {
-	fmt.Printf("%s %s\n", programName, version.GetVersionString())
+	rootCmd := &cobra.Command{
+		Use: programName,
+		/*
+			Short: "A brief description of your application",
+			Long: `A longer description that spans multiple lines and likely contains
+			examples and usage of using your application. For example:
+
+			Cobra is a CLI library for Go that empowers applications.
+			This application is a tool to generate the needed files
+			to quickly create a Cobra application.`,
+		*/
+	}
+
+	// Add subcommands
+	rootCmd.AddCommand(
+		versionCommand(),
+	)
+
+	if err := rootCmd.Execute(); err != nil {
+		// NOTE: we purposely don't display the error, since cobra will have already displayed it
+		os.Exit(1)
+	}
 }

cmd/cardano-up/version.go

@@ -0,0 +1,32 @@
+// Copyright 2023 Blink Labs Software
+//
+// 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 main
+
+import (
+	"fmt"
+
+	"github.com/blinklabs-io/cardano-up/internal/version"
+	"github.com/spf13/cobra"
+)
+
+func versionCommand() *cobra.Command {
+	return &cobra.Command{
+		Use:   "version",
+		Short: "Displays the version",
+		Run: func(cmd *cobra.Command, args []string) {
+			fmt.Printf("%s %s\n", programName, version.GetVersionString())
+		},
+	}
+}

go.mod

@@ -1,3 +1,10 @@
 module github.com/blinklabs-io/cardano-up
 
 go 1.20
+
+require github.com/spf13/cobra v1.8.0
+
+require (
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+)

go.sum

@@ -0,0 +1,10 @@
+github.com/cpuguy83/go-md2man/v2 v2.0.3/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
+github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
+github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/spf13/cobra v1.8.0 h1:7aJaZx1B85qltLMc546zn58BxxfZdR/W22ej9CFoEf0=
+github.com/spf13/cobra v1.8.0/go.mod h1:WXLWApfZ71AjXPya3WOlMsY9yMs7YeiHhFVlvLyhcho=
+github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
+github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=