1 files changed, 66 insertions, 0 deletions
diff --git a/internal/rpc/includes.go b/internal/rpc/includes.go
new file mode 100644
index 00000000..87b00001
--- /dev/null
+++ b/internal/rpc/includes.go
@@ -0,0 +1,66 @@
+package rpc
+
+import (
+	"github.com/roadrunner-server/errors"
+	"github.com/spf13/viper"
+)
+
+const (
+	versionKey           string = "version"
+	includeKey           string = "include"
+	defaultConfigVersion string = "3"
+	prevConfigVersion    string = "2.7"
+)
+
+func getConfiguration(path string) (map[string]any, string, error) {
+	v := viper.New()
+	v.SetConfigFile(path)
+	err := v.ReadInConfig()
+	if err != nil {
+		return nil, "", err
+	}
+
+	// get configuration version
+	ver := v.Get(versionKey)
+	if ver == nil {
+		return nil, "", errors.Str("rr configuration file should contain a version e.g: version: 2.7")
+	}
+
+	if _, ok := ver.(string); !ok {
+		return nil, "", errors.Errorf("type of version should be string, actual: %T", ver)
+	}
+
+	// automatically inject ENV variables using ${ENV} pattern
+	expandEnvViper(v)
+
+	return v.AllSettings(), ver.(string), nil
+}
+
+func handleInclude(rootVersion string, v *viper.Viper) error {
+	// automatically inject ENV variables using ${ENV} pattern
+	// root config
+	expandEnvViper(v)
+
+	ifiles := v.GetStringSlice(includeKey)
+	if ifiles == nil {
+		return nil
+	}
+
+	for _, file := range ifiles {
+		config, version, err := getConfiguration(file)
+		if err != nil {
+			return err
+		}
+
+		if version != rootVersion {
+			return errors.Str("version in included file must be the same as in root")
+		}
+
+		// overriding configuration
+		for key, val := range config {
+			v.Set(key, val)
+		}
+	}
+
+	return nil
+}