runtime: Allow to accept runtime config as a flag.

framework/runtime/parsing.go

@@ -6,18 +6,30 @@ package runtime
 
 import (
  "encoding/json"
+ "flag"
  "fmt"
  "os"
 
  "namespacelabs.dev/foundation/schema/runtime"
 )
 
+var (
+ runtimeConfigJSON = flag.String("foundation_runtime_config_json", "", "runtime config to use instead of /namespace/config/runtime.json.")
+)
+
 type Server = runtime.Server
 
 func LoadRuntimeConfig() (*runtime.RuntimeConfig, error) {
- configBytes, err := os.ReadFile("/namespace/config/runtime.json")
- if err != nil {
- return nil, fmt.Errorf("failed to unwrap runtime configuration: %w", err)
+ var configBytes []byte
+
+ if *runtimeConfigJSON != "" {
+ configBytes = []byte(*runtimeConfigJSON)
+ } else {
+ bs, err := os.ReadFile("/namespace/config/runtime.json")
+ if err != nil {
+ return nil, fmt.Errorf("failed to unwrap runtime configuration: %w", err)
+ }
+ configBytes = bs
  }
 
  rt := &runtime.RuntimeConfig{}