added basic plugin structure

pkg/register/plugin_builder.go

@@ -0,0 +1,48 @@
+package register
+
+import (
+	"context"
+	"os"
+
+	"github.com/hashicorp/go-hclog"
+	"github.com/hashicorp/go-plugin"
+)
+
+type PluginBuilder struct {
+	serveConfig *plugin.ServeConfig
+}
+
+func NewPluginBuilder(name string, p Plugin) *PluginBuilder {
+	logger := hclog.New(&hclog.LoggerOptions{
+		Level:      hclog.Trace,
+		Output:     os.Stderr,
+		JSONFormat: false,
+	})
+
+	var pluginMap = map[string]plugin.Plugin{
+		name: &PluginAPI{
+			Impl: p,
+		},
+	}
+
+	serveConfig := &plugin.ServeConfig{
+		HandshakeConfig: plugin.HandshakeConfig{
+			ProtocolVersion:  1,
+			MagicCookieKey:   "BASIC_PLUGIN",
+			MagicCookieValue: "char",
+		},
+		Plugins: pluginMap,
+		Logger:  logger,
+	}
+
+	return &PluginBuilder{
+		serveConfig: serveConfig,
+	}
+}
+
+func (pr *PluginBuilder) Serve(ctx context.Context) error {
+	plugin.Serve(
+		pr.serveConfig,
+	)
+	return nil
+}