feat(cli): init cli (#3186)

* feat(cli): initilize cli

* fix(config): allow multiple files

* refactor(cli): constructor naming

* go mod tidy

* refactor: move code out of v2 package

* chore: logging v0.1

* chore: remove old gitignore

* fix func

Co-authored-by: Livio Amstutz <livio.a@gmail.com>

cmd/zitadel.go

@@ -0,0 +1,50 @@
+package cmd
+
+import (
+	"bytes"
+	_ "embed"
+	"io"
+
+	"github.com/caos/logging"
+	"github.com/caos/zitadel/cmd/admin"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+var (
+	configFiles []string
+
+	//go:embed defaults.yaml
+	defaultConfig []byte
+)
+
+func New(out io.Writer, in io.Reader, args []string) *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "zitadel",
+		Short: "The ZITADEL CLI let's you interact with ZITADEL",
+		Long:  `The ZITADEL CLI let's you interact with ZITADEL`,
+		Run: func(cmd *cobra.Command, args []string) {
+			logging.New().Info("hello world")
+		},
+	}
+
+	viper.AutomaticEnv()
+	viper.SetConfigType("yaml")
+	err := viper.ReadConfig(bytes.NewBuffer(defaultConfig))
+	logging.New().OnError(err).Fatal("unable to read default config")
+
+	cobra.OnInitialize(initConfig)
+	cmd.PersistentFlags().StringArrayVar(&configFiles, "config", nil, "path to config file to overwrite system defaults")
+
+	cmd.AddCommand(admin.New())
+
+	return cmd
+}
+
+func initConfig() {
+	for _, file := range configFiles {
+		viper.SetConfigFile(file)
+		err := viper.MergeInConfig()
+		logging.WithFields("file", file).OnError(err).Warn("unable to read config file")
+	}
+}