Prepare CLI for move into mainline

packages/cli/src/plugin/interface/log.rs

@@ -0,0 +1,28 @@
+use log;
+use mlua::UserData;
+
+pub struct PluginLogger;
+impl UserData for PluginLogger {
+    fn add_methods<'lua, M: mlua::UserDataMethods<'lua, Self>>(methods: &mut M) {
+        methods.add_function("trace", |_, info: String| {
+            log::trace!("{}", info);
+            Ok(())
+        });
+        methods.add_function("info", |_, info: String| {
+            log::info!("{}", info);
+            Ok(())
+        });
+        methods.add_function("debug", |_, info: String| {
+            log::debug!("{}", info);
+            Ok(())
+        });
+        methods.add_function("warn", |_, info: String| {
+            log::warn!("{}", info);
+            Ok(())
+        });
+        methods.add_function("error", |_, info: String| {
+            log::error!("{}", info);
+            Ok(())
+        });
+    }
+}