Feat/more version info (#224)

cli/internal/cmd/version.go

@@ -1,6 +1,8 @@
 package cmd
 
 import (
+	"runtime/debug"
+
 	"github.com/edgelesssys/constellation/internal/constants"
 	"github.com/spf13/cobra"
 )
@@ -12,9 +14,56 @@ func NewVersionCmd() *cobra.Command {
 		Short: "Display version of this CLI",
 		Long:  "Display version of this CLI.",
 		Args:  cobra.NoArgs,
-		Run: func(cmd *cobra.Command, args []string) {
-			cmd.Printf("CLI Version: v%s \n", constants.VersionInfo)
-		},
+		Run:   runVersion,
 	}
 	return cmd
 }
+
+func runVersion(cmd *cobra.Command, args []string) {
+	buildInfo, ok := debug.ReadBuildInfo()
+	if !ok {
+		cmd.Printf("Unable to retrieve build info. Is buildvcs enabled?")
+		return
+	}
+
+	commit, state, date, goVersion, compiler, platform := parseBuildInfo(buildInfo)
+
+	cmd.Printf("Version:\t%s\n", constants.VersionInfo)
+	cmd.Printf("GitCommit:\t%s\n", commit)
+	cmd.Printf("GitTreeState:\t%s\n", state)
+	cmd.Printf("BuildDate:\t%s\n", date)
+	cmd.Printf("GoVersion:\t%s\n", goVersion)
+	cmd.Printf("Compiler:\t%s\n", compiler)
+	cmd.Printf("Platform:\t%s\n", platform)
+}
+
+func parseBuildInfo(info *debug.BuildInfo) (commit, state, date, goVersion, compiler, platform string) {
+	var arch, os string
+	for idx := range info.Settings {
+		key := info.Settings[idx].Key
+		value := info.Settings[idx].Value
+
+		switch key {
+		case "-compiler":
+			compiler = value
+		case "GOARCH":
+			arch = value
+		case "GOOS":
+			os = value
+		case "vcs.time":
+			date = value
+		case "vcs.modified":
+			if value == "true" {
+				state = "dirty"
+			} else {
+				state = "clean"
+			}
+		case "vcs.revision":
+			commit = value
+		}
+	}
+
+	platform = os + "/" + arch
+	goVersion = info.GoVersion
+	return commit, state, date, goVersion, compiler, platform
+}