Plugins: Transform plugin support (#20036)

currently temporary separate http api

pkg/plugins/backendplugin/log_wrapper.go

@@ -0,0 +1,58 @@
+package backendplugin
+
+import (
+	"io"
+	"io/ioutil"
+	"log"
+
+	glog "github.com/grafana/grafana/pkg/infra/log"
+	hclog "github.com/hashicorp/go-hclog"
+)
+
+type logWrapper struct {
+	Logger glog.Logger
+}
+
+func (lw logWrapper) Trace(msg string, args ...interface{}) {
+	lw.Logger.Debug(msg, args...)
+}
+func (lw logWrapper) Debug(msg string, args ...interface{}) {
+	lw.Logger.Debug(msg, args...)
+}
+func (lw logWrapper) Info(msg string, args ...interface{}) {
+	lw.Logger.Info(msg, args...)
+}
+func (lw logWrapper) Warn(msg string, args ...interface{}) {
+	lw.Logger.Warn(msg, args...)
+}
+func (lw logWrapper) Error(msg string, args ...interface{}) {
+	lw.Logger.Error(msg, args...)
+}
+
+func (lw logWrapper) IsTrace() bool { return true }
+func (lw logWrapper) IsDebug() bool { return true }
+func (lw logWrapper) IsInfo() bool  { return true }
+func (lw logWrapper) IsWarn() bool  { return true }
+func (lw logWrapper) IsError() bool { return true }
+
+func (lw logWrapper) With(args ...interface{}) hclog.Logger {
+	return logWrapper{Logger: lw.Logger.New(args...)}
+}
+func (lw logWrapper) Named(name string) hclog.Logger {
+	return logWrapper{Logger: lw.Logger.New()}
+}
+
+func (lw logWrapper) ResetNamed(name string) hclog.Logger {
+	return logWrapper{Logger: lw.Logger.New()}
+}
+
+func (lw logWrapper) StandardLogger(ops *hclog.StandardLoggerOptions) *log.Logger {
+	return nil
+}
+
+func (lw logWrapper) SetLevel(level hclog.Level) {}
+
+// Return a value that conforms to io.Writer, which can be passed into log.SetOutput()
+func (lw logWrapper) StandardWriter(opts *hclog.StandardLoggerOptions) io.Writer {
+	return ioutil.Discard
+}