refactor(lua): move only runtime lua file in src/ to runtime/lua

reorganize so that initialization is done in lua

4 files changed, 38 insertions, 52 deletions

diff --git a/src/nvim/lua/vim.lua b/runtime/lua/vim/_editor.lua
index f5f293939b..5f3329ef42 100644
--- a/src/nvim/lua/vim.lua
+++ b/runtime/lua/vim/_editor.lua
@@ -34,8 +34,7 @@
 --    - https://github.com/bakpakin/Fennel (pretty print, repl)
 --    - https://github.com/howl-editor/howl/tree/master/lib/howl/util
 
-local vim = vim
-assert(vim)
+local vim = assert(vim)
 assert(vim.inspect)
 
 -- These are for loading runtime modules lazily since they aren't available in
@@ -244,12 +243,6 @@ function vim.schedule_wrap(cb)
   end)
 end
 
---- <Docs described in |vim.empty_dict()| >
----@private
-function vim.empty_dict()
-  return setmetatable({}, vim._empty_dict_mt)
-end
-
 -- vim.fn.{func}(...)
 vim.fn = setmetatable({}, {
   __index = function(t, key)
diff --git a/runtime/lua/vim/_load_package.lua b/runtime/lua/vim/_init_packages.lua
index 59bca9b148..dcb402287c 100644
--- a/runtime/lua/vim/_load_package.lua
+++ b/runtime/lua/vim/_init_packages.lua
@@ -48,5 +48,18 @@ end
 -- Insert vim._load_package after the preloader at position 2
 table.insert(package.loaders, 2, vim._load_package)
 
--- should always be available
+-- builtin functions which always should be available
+require'vim.shared'
 vim.inspect = require'vim.inspect'
+
+--- <Docs described in |vim.empty_dict()| >
+---@private
+--- TODO: should be in vim.shared when vim.shared always uses nvim-lua
+function vim.empty_dict()
+  return setmetatable({}, vim._empty_dict_mt)
+end
+
+-- only on main thread: functions for interacting with editor state
+if not vim.is_thread() then
+  require'vim._editor'
+end
diff --git a/src/nvim/CMakeLists.txt b/src/nvim/CMakeLists.txt
index 21150965f9..9abefbe02a 100644
--- a/src/nvim/CMakeLists.txt
+++ b/src/nvim/CMakeLists.txt
@@ -57,13 +57,13 @@ set(UNICODE_TABLES_GENERATOR ${GENERATOR_DIR}/gen_unicode_tables.lua)
 set(UNICODE_DIR ${PROJECT_SOURCE_DIR}/unicode)
 set(GENERATED_UNICODE_TABLES ${GENERATED_DIR}/unicode_tables.generated.h)
 set(VIM_MODULE_FILE ${GENERATED_DIR}/lua/vim_module.generated.h)
-set(LUA_VIM_MODULE_SOURCE ${PROJECT_SOURCE_DIR}/src/nvim/lua/vim.lua)
+set(LUA_EDITOR_MODULE_SOURCE ${PROJECT_SOURCE_DIR}/runtime/lua/vim/_editor.lua)
 set(LUA_SHARED_MODULE_SOURCE ${PROJECT_SOURCE_DIR}/runtime/lua/vim/shared.lua)
 set(LUA_INSPECT_MODULE_SOURCE ${PROJECT_SOURCE_DIR}/runtime/lua/vim/inspect.lua)
 set(LUA_F_MODULE_SOURCE ${PROJECT_SOURCE_DIR}/runtime/lua/vim/F.lua)
 set(LUA_META_MODULE_SOURCE ${PROJECT_SOURCE_DIR}/runtime/lua/vim/_meta.lua)
 set(LUA_FILETYPE_MODULE_SOURCE ${PROJECT_SOURCE_DIR}/runtime/lua/vim/filetype.lua)
-set(LUA_LOAD_PACKAGE_MODULE_SOURCE ${PROJECT_SOURCE_DIR}/runtime/lua/vim/_load_package.lua)
+set(LUA_INIT_PACKAGES_MODULE_SOURCE ${PROJECT_SOURCE_DIR}/runtime/lua/vim/_init_packages.lua)
 set(LUA_KEYMAP_MODULE_SOURCE ${PROJECT_SOURCE_DIR}/runtime/lua/vim/keymap.lua)
 set(CHAR_BLOB_GENERATOR ${GENERATOR_DIR}/gen_char_blob.lua)
 set(LINT_SUPPRESS_FILE ${PROJECT_BINARY_DIR}/errors.json)
@@ -332,9 +332,9 @@ add_custom_command(
   COMMAND ${CMAKE_COMMAND} -E env
       "LUAC_PRG=${LUAC_PRG}"
       ${LUA_PRG} ${CHAR_BLOB_GENERATOR} -c ${VIM_MODULE_FILE}
-      ${LUA_LOAD_PACKAGE_MODULE_SOURCE} "vim._load_package"
+      ${LUA_INIT_PACKAGES_MODULE_SOURCE} "vim._init_packages"
       ${LUA_INSPECT_MODULE_SOURCE} "vim.inspect"
-      ${LUA_VIM_MODULE_SOURCE} "vim"
+      ${LUA_EDITOR_MODULE_SOURCE} "vim._editor"
       ${LUA_SHARED_MODULE_SOURCE} "vim.shared"
       ${LUA_F_MODULE_SOURCE} "vim.F"
       ${LUA_META_MODULE_SOURCE} "vim._meta"
@@ -342,7 +342,7 @@ add_custom_command(
       ${LUA_KEYMAP_MODULE_SOURCE} "vim.keymap"
   DEPENDS
     ${CHAR_BLOB_GENERATOR}
-    ${LUA_VIM_MODULE_SOURCE}
+    ${LUA_EDITOR_MODULE_SOURCE}
     ${LUA_SHARED_MODULE_SOURCE}
     ${LUA_INSPECT_MODULE_SOURCE}
     ${LUA_F_MODULE_SOURCE}
diff --git a/src/nvim/lua/executor.c b/src/nvim/lua/executor.c
index e233e0e6d0..29a3c515c2 100644
--- a/src/nvim/lua/executor.c
+++ b/src/nvim/lua/executor.c
@@ -525,24 +525,6 @@ static void nlua_common_vim_init(lua_State *lstate, bool is_thread)
   lua_pop(lstate, 3);
 }
 
-static void nlua_preload_modules(lua_State *lstate)
-{
-  lua_getglobal(lstate, "package");  // [package]
-  lua_getfield(lstate, -1, "preload");  // [package, preload]
-  for (size_t i = 0; i < ARRAY_SIZE(builtin_modules); i++) {
-    ModuleDef def = builtin_modules[i];
-    lua_pushinteger(lstate, (long)i);  // [package, preload, i]
-    lua_pushcclosure(lstate, nlua_module_preloader, 1);  // [package, preload, cclosure]
-    lua_setfield(lstate, -2, def.name);  // [package, preload]
-
-    if (nlua_disable_preload && strequal(def.name, "vim")) {
-      break;
-    }
-  }
-
-  lua_pop(lstate, 2);  // []
-}
-
 static int nlua_module_preloader(lua_State *lstate)
 {
   size_t i = (size_t)lua_tointeger(lstate, lua_upvalueindex(1));
@@ -561,24 +543,29 @@ static int nlua_module_preloader(lua_State *lstate)
   return 1;
 }
 
-static bool nlua_common_package_init(lua_State *lstate)
+static bool nlua_init_packages(lua_State *lstate)
   FUNC_ATTR_NONNULL_ALL
 {
-  nlua_preload_modules(lstate);
+  // put builtin packages in preload
+  lua_getglobal(lstate, "package");  // [package]
+  lua_getfield(lstate, -1, "preload");  // [package, preload]
+  for (size_t i = 0; i < ARRAY_SIZE(builtin_modules); i++) {
+    ModuleDef def = builtin_modules[i];
+    lua_pushinteger(lstate, (long)i);  // [package, preload, i]
+    lua_pushcclosure(lstate, nlua_module_preloader, 1);  // [package, preload, cclosure]
+    lua_setfield(lstate, -2, def.name);  // [package, preload]
 
-  lua_getglobal(lstate, "require");
-  lua_pushstring(lstate, "vim._load_package");
-  if (nlua_pcall(lstate, 1, 0)) {
-      nlua_error(lstate, _("E5106: Error while creating _load_package module: %.*s\n"));
-      return false;
+    if (nlua_disable_preload && strequal(def.name, "vim.inspect")) {
+      break;
+    }
   }
 
-  // TODO(bfredl): ideally all initialization should be done as a single require
-  // call.
+  lua_pop(lstate, 2);  // []
+
   lua_getglobal(lstate, "require");
-  lua_pushstring(lstate, "vim.shared");
+  lua_pushstring(lstate, "vim._init_packages");
   if (nlua_pcall(lstate, 1, 0)) {
-      nlua_error(lstate, _("E5106: Error while creating shared module: %.*s\n"));
+      nlua_error(lstate, _("E5106: Error while loading packages: %.*s\n"));
       return false;
   }
 
@@ -654,14 +641,7 @@ static bool nlua_state_init(lua_State *const lstate) FUNC_ATTR_NONNULL_ALL
 
   lua_setglobal(lstate, "vim");
 
-  if (!nlua_common_package_init(lstate)) {
-    return false;
-  }
-
-  lua_getglobal(lstate, "require");
-  lua_pushstring(lstate, "vim");
-  if (nlua_pcall(lstate, 1, 0)) {
-    nlua_error(lstate, _("E5106: Error while creating vim module: %.*s\n"));
+  if (!nlua_init_packages(lstate)) {
     return false;
   }
 
@@ -732,7 +712,7 @@ static lua_State *nlua_thread_acquire_vm(void)
 
   lua_setglobal(lstate, "vim");
 
-  nlua_common_package_init(lstate);
+  nlua_init_packages(lstate);
 
   lua_getglobal(lstate, "package");
   lua_getfield(lstate, -1, "loaded");