ladybird/Ladybird/Utilities.cpp

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/*
* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2023, Andrew Kaster <akaster@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "Utilities.h"
#include <AK/LexicalPath.h>
#include <AK/Platform.h>
#include <LibCore/Environment.h>
#include <LibCore/ResourceImplementationFile.h>
#include <LibCore/System.h>
#include <LibFileSystem/FileSystem.h>
#define TOKENCAT(x, y) x##y
#define STRINGIFY(x) TOKENCAT(x, sv)
// This is expected to be set from the build scripts, if a packager desires
#if defined(LADYBIRD_LIBEXECDIR)
constexpr auto libexec_path = STRINGIFY(LADYBIRD_LIBEXECDIR);
#else
constexpr auto libexec_path = "libexec"sv;
#endif
ByteString s_serenity_resource_root;
ErrorOr<ByteString> application_directory()
{
auto current_executable_path = TRY(Core::System::current_executable_path());
return LexicalPath::dirname(current_executable_path);
}
[[gnu::used]] static LexicalPath find_prefix(LexicalPath const& application_directory);
static LexicalPath find_prefix(LexicalPath const& application_directory)
{
if (application_directory.string().ends_with(libexec_path)) {
// Strip libexec_path if it's there
return LexicalPath(application_directory.string().substring_view(0, application_directory.string().length() - libexec_path.length()));
}
// Otherwise, we are in $prefix/bin
return application_directory.parent();
}
void platform_init()
{
s_serenity_resource_root = [] {
auto home = Core::Environment::get("XDG_CONFIG_HOME"sv)
.value_or_lazy_evaluated_optional([]() { return Core::Environment::get("HOME"sv); });
if (home.has_value()) {
auto home_lagom = ByteString::formatted("{}/.lagom", home);
if (FileSystem::is_directory(home_lagom))
return home_lagom;
}
auto app_dir = MUST(application_directory());
#ifdef AK_OS_MACOS
return LexicalPath(app_dir).parent().append("Resources"sv).string();
#else
return find_prefix(LexicalPath(app_dir)).append("share/Lagom"sv).string();
#endif
}();
Core::ResourceImplementation::install(make<Core::ResourceImplementationFile>(MUST(String::from_byte_string(s_serenity_resource_root))));
}
ErrorOr<Vector<ByteString>> get_paths_for_helper_process(StringView process_name)
{
auto application_path = TRY(application_directory());
Vector<ByteString> paths;
#if !defined(AK_OS_MACOS)
auto prefix = find_prefix(LexicalPath(application_path));
TRY(paths.try_append(LexicalPath::join(prefix.string(), libexec_path, process_name).string()));
TRY(paths.try_append(LexicalPath::join(prefix.string(), "bin"sv, process_name).string()));
#endif
TRY(paths.try_append(ByteString::formatted("{}/{}", application_path, process_name)));
TRY(paths.try_append(ByteString::formatted("./{}", process_name)));
// NOTE: Add platform-specific paths here
return paths;
}