Remove cobra

Cobra is pretty opnionated and its complexity isnt required
currently.

cmd/rdpgw/main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"context"
 	"crypto/tls"
+	"github.com/thought-machine/go-flags"
 	"github.com/bolkedebruin/rdpgw/cmd/rdpgw/api"
 	"github.com/bolkedebruin/rdpgw/cmd/rdpgw/common"
 	"github.com/bolkedebruin/rdpgw/cmd/rdpgw/config"
@@ -10,7 +11,6 @@ import (
 	"github.com/bolkedebruin/rdpgw/cmd/rdpgw/security"
 	"github.com/coreos/go-oidc/v3/oidc"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
-	"github.com/spf13/cobra"
 	"golang.org/x/oauth2"
 	"log"
 	"net/http"
@@ -18,21 +18,19 @@ import (
 	"strconv"
 )
 
-var cmd = &cobra.Command{
-	Use:	"rdpgw",
-	Long:	"Remote Desktop Gateway",
+var opts struct {
+	configFile string `short:"c" long:"conf" description:"config file (yaml)" default:"rdpgw.yaml"`
 }
 
-var (
-	configFile	string
-)
-
 var conf config.Configuration
 
 func main() {
 	// get config
-	cmd.PersistentFlags().StringVarP(&configFile, "conf", "c", "rdpgw.yaml",  "config file (json, yaml, ini)")
-	conf = config.Load(configFile)
+	_, err := flags.Parse(&opts)
+	if err != nil {
+		panic(err)
+	}
+	conf = config.Load(opts.configFile)
 
 	security.VerifyClientIP = conf.Security.VerifyClientIp
 

go.mod

@@ -10,7 +10,7 @@ require (
 	github.com/knadh/koanf v1.4.2
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/prometheus/client_golang v1.12.1
-	github.com/spf13/cobra v1.5.0
+	github.com/thought-machine/go-flags v1.6.1
 	golang.org/x/oauth2 v0.0.0-20220722155238-128564f6959c
 )
 
@@ -20,7 +20,6 @@ require (
 	github.com/fsnotify/fsnotify v1.5.4 // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/gorilla/securecookie v1.1.1 // indirect
-	github.com/inconshreveable/mousetrap v1.0.0 // indirect
 	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
 	github.com/mitchellh/copystructure v1.2.0 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
@@ -29,7 +28,6 @@ require (
 	github.com/prometheus/client_model v0.2.0 // indirect
 	github.com/prometheus/common v0.32.1 // indirect
 	github.com/prometheus/procfs v0.7.3 // indirect
-	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/stretchr/testify v1.7.1 // indirect
 	golang.org/x/crypto v0.0.0-20220411220226-7b82a4e95df4 // indirect
 	golang.org/x/net v0.0.0-20220624214902-1bab6f366d9e // indirect
@@ -37,4 +35,5 @@ require (
 	google.golang.org/appengine v1.6.7 // indirect
 	google.golang.org/protobuf v1.28.0 // indirect
 	gopkg.in/square/go-jose.v2 v2.6.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0 // indirect
 )