refactor command package to remove globals and add dependency injection

cmd/syft/cli/version.go

@@ -0,0 +1,71 @@
+package cli
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/anchore/syft/cmd/syft/cli/options"
+	"github.com/anchore/syft/internal"
+	"github.com/anchore/syft/internal/config"
+	"github.com/anchore/syft/internal/version"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+func Version(v *viper.Viper, app *config.Application) *cobra.Command {
+	o := &options.VersionOptions{}
+	cmd := &cobra.Command{
+		Use:   "version",
+		Short: "show the version",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return printVersion(o.Output)
+		},
+	}
+
+	err := o.AddFlags(cmd, v)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	return cmd
+}
+
+func printVersion(output string) error {
+	versionInfo := version.FromBuild()
+
+	switch output {
+	case "text":
+		fmt.Println("Application:       ", internal.ApplicationName)
+		fmt.Println("Version:           ", versionInfo.Version)
+		fmt.Println("JsonSchemaVersion: ", internal.JSONSchemaVersion)
+		fmt.Println("BuildDate:         ", versionInfo.BuildDate)
+		fmt.Println("GitCommit:         ", versionInfo.GitCommit)
+		fmt.Println("GitDescription:    ", versionInfo.GitDescription)
+		fmt.Println("Platform:          ", versionInfo.Platform)
+		fmt.Println("GoVersion:         ", versionInfo.GoVersion)
+		fmt.Println("Compiler:          ", versionInfo.Compiler)
+
+	case "json":
+		enc := json.NewEncoder(os.Stdout)
+		enc.SetEscapeHTML(false)
+		enc.SetIndent("", " ")
+		err := enc.Encode(&struct {
+			version.Version
+			Application string `json:"application"`
+		}{
+			Version:     versionInfo,
+			Application: internal.ApplicationName,
+		})
+		if err != nil {
+			fmt.Printf("failed to show version information: %+v\n", err)
+			os.Exit(1)
+		}
+	default:
+		fmt.Printf("unsupported output format: %s\n", output)
+		os.Exit(1)
+	}
+
+	return nil
+}