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/verify_database.go

@@ -0,0 +1,50 @@
+package initialise
+
+import (
+	"database/sql"
+	_ "embed"
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+	"github.com/zitadel/logging"
+)
+
+var (
+	searchDatabase = "SELECT database_name FROM [show databases] WHERE database_name = $1"
+
+	//go:embed sql/02_database.sql
+	databaseStmt string
+)
+
+func newDatabase() *cobra.Command {
+	return &cobra.Command{
+		Use:   "database",
+		Short: "initialize only the database",
+		Long: `Sets up the ZITADEL database.
+
+Prereqesits:
+- cockroachdb
+
+The user provided by flags needs priviledge 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.New())
+
+			err := initialise(config, VerifyDatabase(config.Database.Database))
+			logging.OnError(err).Fatal("unable to initialize the database")
+		},
+	}
+}
+
+func VerifyDatabase(database string) func(*sql.DB) error {
+	return func(db *sql.DB) error {
+		return verify(db,
+			exists(searchDatabase, database),
+			exec(fmt.Sprintf(databaseStmt, database)),
+		)
+	}
+}