Enable global ENV variable to detect environment

db/db.go

@@ -16,6 +16,7 @@ package db
 
 import (
 	"io"
+	"os"
 
 	"context"
 
@@ -160,6 +161,12 @@ func Process(fib *fibre.Context, ast *sql.Query, vars map[string]interface{}) (o
 
 	vars[varKeyOrigin] = fib.Origin()
 
+	// Ensure that the specified environment
+	// variable 'ENV' is available to the
+	// request, to detect the environment.
+
+	vars[varKeyEnv] = os.Getenv(varKeyEnv)
+
 	// Ensure that the current authentication
 	// data is made available as a runtime
 	// variable to the query layer.

db/vars.go

@@ -60,6 +60,7 @@ const (
 const (
 	varKeyId     = "id"
 	varKeyIp     = "ip"
+	varKeyEnv    = "ENV"
 	varKeyAuth   = "auth"
 	varKeyKeep   = "keep"
 	varKeyThis   = "this"