fix: enable env vars in setup steps (and deprecate admin subcommand) (#3871)

* fix: enable env vars in setup steps (and deprecate admin subcommand)

* fix tests and error text

cmd/initialise/init.go

@@ -0,0 +1,74 @@
+package initialise
+
+import (
+	"database/sql"
+	_ "embed"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+	"github.com/zitadel/logging"
+
+	"github.com/zitadel/zitadel/internal/database"
+	"github.com/zitadel/zitadel/internal/id"
+)
+
+func New() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "init",
+		Short: "initialize ZITADEL instance",
+		Long: `Sets up the minimum requirements to start ZITADEL.
+
+Prereqesits:
+- cockroachdb
+
+The user provided by flags needs privileges to
+- create the database if it does not exist
+- see other users and create a new one if the user does not exist
+- grant all rights of the ZITADEL database to the user created if not yet set
+`,
+		Run: func(cmd *cobra.Command, args []string) {
+			config := MustNewConfig(viper.GetViper())
+
+			InitAll(config)
+		},
+	}
+
+	cmd.AddCommand(newZitadel(), newDatabase(), newUser(), newGrant())
+	return cmd
+}
+
+func InitAll(config *Config) {
+	id.Configure(config.Machine)
+	err := initialise(config,
+		VerifyUser(config.Database.Username, config.Database.Password),
+		VerifyDatabase(config.Database.Database),
+		VerifyGrant(config.Database.Database, config.Database.Username),
+	)
+	logging.OnError(err).Fatal("unable to initialize the database")
+
+	err = verifyZitadel(config.Database)
+	logging.OnError(err).Fatal("unable to initialize ZITADEL")
+}
+
+func initialise(config *Config, steps ...func(*sql.DB) error) error {
+	logging.Info("initialization started")
+
+	db, err := database.Connect(adminConfig(config))
+	if err != nil {
+		return err
+	}
+	err = Initialise(db, steps...)
+	if err != nil {
+		return err
+	}
+	return db.Close()
+}
+
+func Initialise(db *sql.DB, steps ...func(*sql.DB) error) error {
+	for _, step := range steps {
+		if err := step(db); err != nil {
+			return err
+		}
+	}
+	return nil
+}