refactor: plugin code structure

plugin/go/config.go

@@ -0,0 +1,37 @@
+package pluginInternal
+
+import (
+	"os"
+	"strings"
+
+	"github.com/hashicorp/go-plugin"
+)
+
+const PluginName = "debugtalk"
+const RPCPluginName = PluginName + "_rpc"
+const GRPCPluginName = PluginName + "_grpc"
+
+// handshakeConfigs are used to just do a basic handshake between
+// a plugin and host. If the handshake fails, a user friendly error is shown.
+// This prevents users from executing bad plugins or executing a plugin
+// directory. It is a UX feature, not a security feature.
+var HandshakeConfig = plugin.HandshakeConfig{
+	ProtocolVersion:  1,
+	MagicCookieKey:   "HttpRunnerPlus",
+	MagicCookieValue: PluginName,
+}
+
+const hrpPluginTypeEnvName = "HRP_PLUGIN_TYPE"
+
+var hrpPluginType string
+
+func init() {
+	hrpPluginType = strings.ToLower(os.Getenv(hrpPluginTypeEnvName))
+	if hrpPluginType == "" {
+		hrpPluginType = "grpc" // default
+	}
+}
+
+func IsRPCPluginType() bool {
+	return hrpPluginType == "rpc"
+}