Add a version command

Adding a version string to the build, and as part of that we need a way
to handle default org values. Set to nil uuid if the default org is not
set.

Signed-off-by: Craig Tracey <craig@arctir.com>

commands/cli.go

@@ -1,20 +1,35 @@
 package commands
 
 import (
+	"fmt"
 	"os"
 	"path"
 
 	"github.com/arctir/flightdeck-cli/commands/common"
 	flightdeckclient "github.com/arctir/go-flightdeck/pkg/client"
 )
 
+var (
+	version = "dev"
+	commit  = "none"
+	date    = "unknown"
+)
+
 type Cli struct {
 	common.Globals
 
-	Auth   AuthCommand   `cmd:"auth"`
-	Create CreateCommand `cmd:"create"`
-	Get    GetCommand    `cmd:"get" predictor:"getPredictor"`
-	Delete DeleteCommand `cmd:"delete"`
+	Auth    AuthCommand    `cmd:"auth"`
+	Create  CreateCommand  `cmd:"create"`
+	Get     GetCommand     `cmd:"get" predictor:"getPredictor"`
+	Delete  DeleteCommand  `cmd:"delete"`
+	Version VersionCommand `cmd:"version"`
+}
+
+type VersionCommand struct{}
+
+func (c VersionCommand) Run(parent *Cli, ctx *Context) error {
+	fmt.Printf("flightdeck %s, commit %s, built at %s", version, commit, date)
+	return nil
 }
 
 func (c *Cli) AfterApply(ctx *Context, globals *common.Globals) error {

commands/common/common.go

@@ -3,7 +3,7 @@ package common
 import "github.com/google/uuid"
 
 type OrgFlags struct {
-	Org uuid.UUID `name:"org" short:"o" default:"${defaultOrg}" help:"ID of the organization."`
+	Org *uuid.UUID `name:"org" short:"o" optional:"" default:"${defaultOrg}" help:"ID of the organization."`
 }
 
 type PortalFlags struct {

main.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/alecthomas/kong"
 	"github.com/arctir/flightdeck-cli/commands"
+	"github.com/google/uuid"
 )
 
 const defaultAPIEndpoint = "https://api.arctir.cloud/v1"
@@ -26,6 +27,9 @@ func main() {
 	}
 
 	defaultOrg := os.Getenv("FLIGHTDECK_ORG")
+	if defaultOrg == "" {
+		defaultOrg = uuid.Nil.String()
+	}
 
 	cli := commands.Cli{}
 	commandContext := commands.Context{}