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godot/core/extension/gdextension_library_loader.cpp

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/**************************************************************************/
/* gdextension_library_loader.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#include "gdextension_library_loader.h"
#include "core/config/project_settings.h"
#include "core/io/dir_access.h"
#include "core/version.h"
#include "gdextension.h"
Vector<SharedObject> GDExtensionLibraryLoader::find_extension_dependencies(const String &p_path, Ref<ConfigFile> p_config, std::function<bool(String)> p_has_feature) {
Vector<SharedObject> dependencies_shared_objects;
if (p_config->has_section("dependencies")) {
List<String> config_dependencies;
p_config->get_section_keys("dependencies", &config_dependencies);
for (const String &dependency : config_dependencies) {
Vector<String> dependency_tags = dependency.split(".");
bool all_tags_met = true;
for (int i = 0; i < dependency_tags.size(); i++) {
String tag = dependency_tags[i].strip_edges();
if (!p_has_feature(tag)) {
all_tags_met = false;
break;
}
}
if (all_tags_met) {
Dictionary dependency_value = p_config->get_value("dependencies", dependency);
for (const Variant *key = dependency_value.next(nullptr); key; key = dependency_value.next(key)) {
String dependency_path = *key;
String target_path = dependency_value[*key];
if (dependency_path.is_relative_path()) {
dependency_path = p_path.get_base_dir().path_join(dependency_path);
}
dependencies_shared_objects.push_back(SharedObject(dependency_path, dependency_tags, target_path));
}
break;
}
}
}
return dependencies_shared_objects;
}
String GDExtensionLibraryLoader::find_extension_library(const String &p_path, Ref<ConfigFile> p_config, std::function<bool(String)> p_has_feature, PackedStringArray *r_tags) {
// First, check the explicit libraries.
if (p_config->has_section("libraries")) {
List<String> libraries;
p_config->get_section_keys("libraries", &libraries);
// Iterate the libraries, finding the best matching tags.
String best_library_path;
Vector<String> best_library_tags;
for (const String &E : libraries) {
Vector<String> tags = E.split(".");
bool all_tags_met = true;
for (int i = 0; i < tags.size(); i++) {
String tag = tags[i].strip_edges();
if (!p_has_feature(tag)) {
all_tags_met = false;
break;
}
}
if (all_tags_met && tags.size() > best_library_tags.size()) {
best_library_path = p_config->get_value("libraries", E);
best_library_tags = tags;
}
}
if (!best_library_path.is_empty()) {
if (best_library_path.is_relative_path()) {
best_library_path = p_path.get_base_dir().path_join(best_library_path);
}
if (r_tags != nullptr) {
r_tags->append_array(best_library_tags);
}
return best_library_path;
}
}
// Second, try to autodetect.
String autodetect_library_prefix;
if (p_config->has_section_key("configuration", "autodetect_library_prefix")) {
autodetect_library_prefix = p_config->get_value("configuration", "autodetect_library_prefix");
}
if (!autodetect_library_prefix.is_empty()) {
String autodetect_path = autodetect_library_prefix;
if (autodetect_path.is_relative_path()) {
autodetect_path = p_path.get_base_dir().path_join(autodetect_path);
}
// Find the folder and file parts of the prefix.
String folder;
String file_prefix;
if (DirAccess::dir_exists_absolute(autodetect_path)) {
folder = autodetect_path;
} else if (DirAccess::dir_exists_absolute(autodetect_path.get_base_dir())) {
folder = autodetect_path.get_base_dir();
file_prefix = autodetect_path.get_file();
} else {
ERR_FAIL_V_MSG(String(), vformat("Error in extension: %s. Could not find folder for automatic detection of libraries files. autodetect_library_prefix=\"%s\"", p_path, autodetect_library_prefix));
}
// Open the folder.
Ref<DirAccess> dir = DirAccess::open(folder);
ERR_FAIL_COND_V_MSG(dir.is_null(), String(), vformat("Error in extension: %s. Could not open folder for automatic detection of libraries files. autodetect_library_prefix=\"%s\"", p_path, autodetect_library_prefix));
// Iterate the files and check the prefixes, finding the best matching file.
String best_file;
Vector<String> best_file_tags;
dir->list_dir_begin();
String file_name = dir->_get_next();
while (file_name != "") {
if (!dir->current_is_dir() && file_name.begins_with(file_prefix)) {
// Check if the files matches all requested feature tags.
String tags_str = file_name.trim_prefix(file_prefix);
tags_str = tags_str.trim_suffix(tags_str.get_extension());
Vector<String> tags = tags_str.split(".", false);
bool all_tags_met = true;
for (int i = 0; i < tags.size(); i++) {
String tag = tags[i].strip_edges();
if (!p_has_feature(tag)) {
all_tags_met = false;
break;
}
}
// If all tags are found in the feature list, and we found more tags than before, use this file.
if (all_tags_met && tags.size() > best_file_tags.size()) {
best_file_tags = tags;
best_file = file_name;
}
}
file_name = dir->_get_next();
}
if (!best_file.is_empty()) {
String library_path = folder.path_join(best_file);
if (r_tags != nullptr) {
r_tags->append_array(best_file_tags);
}
return library_path;
}
}
return String();
}
Error GDExtensionLibraryLoader::open_library(const String &p_path) {
Error err = parse_gdextension_file(p_path);
if (err != OK) {
return err;
}
String abs_path = ProjectSettings::get_singleton()->globalize_path(library_path);
Vector<String> abs_dependencies_paths;
if (!library_dependencies.is_empty()) {
for (const SharedObject &dependency : library_dependencies) {
abs_dependencies_paths.push_back(ProjectSettings::get_singleton()->globalize_path(dependency.path));
}
}
OS::GDExtensionData data = {
true, // also_set_library_path
&library_path, // r_resolved_path
Engine::get_singleton()->is_editor_hint(), // generate_temp_files
&abs_dependencies_paths, // library_dependencies
};
err = OS::get_singleton()->open_dynamic_library(is_static_library ? String() : abs_path, library, &data);
if (err != OK) {
return err;
}
return OK;
}
Error GDExtensionLibraryLoader::initialize(GDExtensionInterfaceGetProcAddress p_get_proc_address, const Ref<GDExtension> &p_extension, GDExtensionInitialization *r_initialization) {
#ifdef TOOLS_ENABLED
p_extension->set_reloadable(is_reloadable && Engine::get_singleton()->is_extension_reloading_enabled());
#endif
for (const KeyValue<String, String> &icon : class_icon_paths) {
p_extension->class_icon_paths[icon.key] = icon.value;
}
void *entry_funcptr = nullptr;
Error err = OS::get_singleton()->get_dynamic_library_symbol_handle(library, entry_symbol, entry_funcptr, false);
if (err != OK) {
ERR_PRINT("GDExtension entry point '" + entry_symbol + "' not found in library " + library_path);
return err;
}
GDExtensionInitializationFunction initialization_function = (GDExtensionInitializationFunction)entry_funcptr;
GDExtensionBool ret = initialization_function(p_get_proc_address, p_extension.ptr(), r_initialization);
if (ret) {
return OK;
} else {
ERR_PRINT("GDExtension initialization function '" + entry_symbol + "' returned an error.");
return FAILED;
}
}
void GDExtensionLibraryLoader::close_library() {
OS::get_singleton()->close_dynamic_library(library);
library = nullptr;
}
bool GDExtensionLibraryLoader::is_library_open() const {
return library != nullptr;
}
bool GDExtensionLibraryLoader::has_library_changed() const {
#ifdef TOOLS_ENABLED
// Check only that the last modified time is different (rather than checking
// that it's newer) since some OS's (namely Windows) will preserve the modified
// time by default when copying files.
if (FileAccess::get_modified_time(resource_path) != resource_last_modified_time) {
return true;
}
if (FileAccess::get_modified_time(library_path) != library_last_modified_time) {
return true;
}
#endif
return false;
}
Error GDExtensionLibraryLoader::parse_gdextension_file(const String &p_path) {
resource_path = p_path;
Ref<ConfigFile> config;
config.instantiate();
Error err = config->load(p_path);
if (err != OK) {
ERR_PRINT("Error loading GDExtension configuration file: " + p_path);
return err;
}
if (!config->has_section_key("configuration", "entry_symbol")) {
ERR_PRINT("GDExtension configuration file must contain a \"configuration/entry_symbol\" key: " + p_path);
return ERR_INVALID_DATA;
}
entry_symbol = config->get_value("configuration", "entry_symbol");
uint32_t compatibility_minimum[3] = { 0, 0, 0 };
if (config->has_section_key("configuration", "compatibility_minimum")) {
String compat_string = config->get_value("configuration", "compatibility_minimum");
Vector<int> parts = compat_string.split_ints(".");
for (int i = 0; i < parts.size(); i++) {
if (i >= 3) {
break;
}
if (parts[i] >= 0) {
compatibility_minimum[i] = parts[i];
}
}
} else {
ERR_PRINT("GDExtension configuration file must contain a \"configuration/compatibility_minimum\" key: " + p_path);
return ERR_INVALID_DATA;
}
if (compatibility_minimum[0] < 4 || (compatibility_minimum[0] == 4 && compatibility_minimum[1] == 0)) {
ERR_PRINT(vformat("GDExtension's compatibility_minimum (%d.%d.%d) must be at least 4.1.0: %s", compatibility_minimum[0], compatibility_minimum[1], compatibility_minimum[2], p_path));
return ERR_INVALID_DATA;
}
bool compatible = true;
// Check version lexicographically.
if (VERSION_MAJOR != compatibility_minimum[0]) {
compatible = VERSION_MAJOR > compatibility_minimum[0];
} else if (VERSION_MINOR != compatibility_minimum[1]) {
compatible = VERSION_MINOR > compatibility_minimum[1];
} else {
compatible = VERSION_PATCH >= compatibility_minimum[2];
}
if (!compatible) {
ERR_PRINT(vformat("GDExtension only compatible with Godot version %d.%d.%d or later: %s", compatibility_minimum[0], compatibility_minimum[1], compatibility_minimum[2], p_path));
return ERR_INVALID_DATA;
}
// Optionally check maximum compatibility.
if (config->has_section_key("configuration", "compatibility_maximum")) {
uint32_t compatibility_maximum[3] = { 0, 0, 0 };
String compat_string = config->get_value("configuration", "compatibility_maximum");
Vector<int> parts = compat_string.split_ints(".");
for (int i = 0; i < 3; i++) {
if (i < parts.size() && parts[i] >= 0) {
compatibility_maximum[i] = parts[i];
} else {
// If a version part is missing, set the maximum to an arbitrary high value.
compatibility_maximum[i] = 9999;
}
}
compatible = true;
if (VERSION_MAJOR != compatibility_maximum[0]) {
compatible = VERSION_MAJOR < compatibility_maximum[0];
} else if (VERSION_MINOR != compatibility_maximum[1]) {
compatible = VERSION_MINOR < compatibility_maximum[1];
}
#if VERSION_PATCH
// #if check to avoid -Wtype-limits warning when 0.
else {
compatible = VERSION_PATCH <= compatibility_maximum[2];
}
#endif
if (!compatible) {
ERR_PRINT(vformat("GDExtension only compatible with Godot version %s or earlier: %s", compat_string, p_path));
return ERR_INVALID_DATA;
}
}
library_path = find_extension_library(p_path, config, [](const String &p_feature) { return OS::get_singleton()->has_feature(p_feature); });
if (library_path.is_empty()) {
const String os_arch = OS::get_singleton()->get_name().to_lower() + "." + Engine::get_singleton()->get_architecture_name();
ERR_PRINT(vformat("No GDExtension library found for current OS and architecture (%s) in configuration file: %s", os_arch, p_path));
return ERR_FILE_NOT_FOUND;
}
is_static_library = library_path.ends_with(".a") || library_path.ends_with(".xcframework");
if (!library_path.is_resource_file() && !library_path.is_absolute_path()) {
library_path = p_path.get_base_dir().path_join(library_path);
}
#ifdef TOOLS_ENABLED
is_reloadable = config->get_value("configuration", "reloadable", false);
update_last_modified_time(
FileAccess::get_modified_time(resource_path),
FileAccess::get_modified_time(library_path));
#endif
library_dependencies = find_extension_dependencies(p_path, config, [](const String &p_feature) { return OS::get_singleton()->has_feature(p_feature); });
// Handle icons if any are specified.
if (config->has_section("icons")) {
List<String> keys;
config->get_section_keys("icons", &keys);
for (const String &key : keys) {
String icon_path = config->get_value("icons", key);
if (icon_path.is_relative_path()) {
icon_path = p_path.get_base_dir().path_join(icon_path);
}
class_icon_paths[key] = icon_path;
}
}
return OK;
}
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