fix(core): import pybookwyrm before running plugins

Fixes test plugins/{missing-find,not-importing-pybookwyrm}.py which
recently broke. Triage.

Related to #62.

Author: tmplt

src/core/plugin_handler.cpp

@@ -53,6 +53,12 @@ void plugin_handler::load_plugins()
     log(log_level::debug, fmt::format("coercing CPython to look for pybookwyrm in {}", options_.library_path));
 #endif
 
+    /*
+     * Triage fix for crash in detail::to_py_dict if no loaded plugin imports pybookwyrm.
+     * TODO: do away with this, and link pybookwyrm instead.
+     */
+    std::ignore = py::module::import("pybookwyrm");
+
     for (auto &path : options_.plugin_paths)
         log(log_level::debug, fmt::format("looking for scripts in {}", path.string()));
 

tests/plugins/not-importing-pybookwyrm.py

@@ -1,4 +1,7 @@
+# While there exist no reason to not import pybookwyrm, a module
+# that doesn't actually call back should still work.
+
 def find(wanted, bookwyrm):
     pass
 
-#PASS TypeError: Unregistered type : bookwyrm::core::year_mod
+#PASS exiting plugin 'not-importing-pybookwyrm'