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/*
* Copyright (c) 2022, Andrew Kaster <akaster@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#define AK_DONT_REPLACE_STD
#include <AK/LexicalPath.h>
#include <AK/Platform.h>
#include <AK/ScopeGuard.h>
#include <AK/String.h>
#include <LibArchive/Tar.h>
#include <LibArchive/TarStream.h>
#include <LibCore/Directory.h>
#include <LibCore/File.h>
#include <LibCore/FileStream.h>
#include <LibCore/Stream.h>
#include <LibCore/System.h>
#include <LibMain/Main.h>
#include <QCoreApplication>
#include <QJniObject>
#include <QSslSocket>
#ifndef AK_OS_ANDROID
# error This file is for Android only, check CMake config!
#endif
// HACK ALERT, we need to include LibMain manually here because the Qt build system doesn't include LibMain.a in the actual executable,
// nor include it in libladybird_<arch>.so
#include <LibMain/Main.cpp> // NOLINT(bugprone-suspicious-include)
extern String s_serenity_resource_root;
void android_platform_init();
static void extract_ladybird_resources();
static ErrorOr<void> extract_tar_archive(String archive_file, String output_directory);
void android_platform_init()
{
qDebug() << "Device supports OpenSSL: " << QSslSocket::supportsSsl();
QJniObject res = QJniObject::callStaticMethod<jstring>("org/serenityos/ladybird/TransferAssets",
"transferAssets",
"(Landroid/content/Context;)Ljava/lang/String;",
QNativeInterface::QAndroidApplication::context());
s_serenity_resource_root = res.toString().toUtf8().data();
extract_ladybird_resources();
}
void extract_ladybird_resources()
{
qDebug() << "serenity resource root is " << s_serenity_resource_root.characters();
auto file_or_error = Core::System::open(String::formatted("{}/res/icons/16x16/app-browser.png", s_serenity_resource_root), O_RDONLY);
if (file_or_error.is_error()) {
qDebug() << "Unable to open test file file as expected, extracting asssets...";
MUST(extract_tar_archive(String::formatted("{}/ladybird-assets.tar", s_serenity_resource_root), s_serenity_resource_root));
} else {
qDebug() << "Opened app-browser.png test file, good to go!";
qDebug() << "Hopefully no developer changed the asset files and expected them to be re-extracted!";
}
}
ErrorOr<void> extract_tar_archive(String archive_file, String output_directory)
{
constexpr size_t buffer_size = 4096;
auto file = TRY(Core::File::open(archive_file, Core::OpenMode::ReadOnly));
String old_pwd = TRY(Core::System::getcwd());
TRY(Core::System::chdir(output_directory));
ScopeGuard go_back = [&old_pwd] { MUST(Core::System::chdir(old_pwd)); };
Core::InputFileStream file_stream(file);
Archive::TarInputStream tar_stream(file_stream);
if (!tar_stream.valid()) {
qDebug() << "the provided file is not a well-formatted ustar file";
return Error::from_errno(EINVAL);
}
HashMap<String, String> global_overrides;
HashMap<String, String> local_overrides;
auto get_override = [&](StringView key) -> Optional<String> {
Optional<String> maybe_local = local_overrides.get(key);
if (maybe_local.has_value())
return maybe_local;
Optional<String> maybe_global = global_overrides.get(key);
if (maybe_global.has_value())
return maybe_global;
return {};
};
for (; !tar_stream.finished(); tar_stream.advance()) {
Archive::TarFileHeader const& header = tar_stream.header();
// Handle meta-entries earlier to avoid consuming the file content stream.
if (header.content_is_like_extended_header()) {
switch (header.type_flag()) {
case Archive::TarFileType::GlobalExtendedHeader: {
TRY(tar_stream.for_each_extended_header([&](StringView key, StringView value) {
if (value.length() == 0)
global_overrides.remove(key);
else
global_overrides.set(key, value);
}));
break;
}
case Archive::TarFileType::ExtendedHeader: {
TRY(tar_stream.for_each_extended_header([&](StringView key, StringView value) {
local_overrides.set(key, value);
}));
break;
}
default:
warnln("Unknown extended header type '{}' of {}", (char)header.type_flag(), header.filename());
VERIFY_NOT_REACHED();
}
continue;
}
Archive::TarFileStream file_stream = tar_stream.file_contents();
// Handle other header types that don't just have an effect on extraction.
switch (header.type_flag()) {
case Archive::TarFileType::LongName: {
StringBuilder long_name;
Array<u8, buffer_size> buffer;
size_t bytes_read;
while ((bytes_read = file_stream.read(buffer)) > 0)
long_name.append(reinterpret_cast<char*>(buffer.data()), bytes_read);
local_overrides.set("path", long_name.to_string());
continue;
}
default:
// None of the relevant headers, so continue as normal.
break;
}
LexicalPath path = LexicalPath(header.filename());
if (!header.prefix().is_empty())
path = path.prepend(header.prefix());
String filename = get_override("path"sv).value_or(path.string());
String absolute_path = Core::File::absolute_path(filename);
auto parent_path = LexicalPath(absolute_path).parent();
switch (header.type_flag()) {
case Archive::TarFileType::NormalFile:
case Archive::TarFileType::AlternateNormalFile: {
MUST(Core::Directory::create(parent_path, Core::Directory::CreateDirectories::Yes));
int fd = TRY(Core::System::open(absolute_path, O_CREAT | O_WRONLY, header.mode()));
Array<u8, buffer_size> buffer;
size_t bytes_read;
while ((bytes_read = file_stream.read(buffer)) > 0)
TRY(Core::System::write(fd, buffer.span().slice(0, bytes_read)));
TRY(Core::System::close(fd));
break;
}
case Archive::TarFileType::SymLink: {
MUST(Core::Directory::create(parent_path, Core::Directory::CreateDirectories::Yes));
TRY(Core::System::symlink(header.link_name(), absolute_path));
break;
}
case Archive::TarFileType::Directory: {
MUST(Core::Directory::create(parent_path, Core::Directory::CreateDirectories::Yes));
auto result_or_error = Core::System::mkdir(absolute_path, header.mode());
if (result_or_error.is_error() && result_or_error.error().code() != EEXIST)
return result_or_error.error();
break;
}
default:
// FIXME: Implement other file types
warnln("file type '{}' of {} is not yet supported", (char)header.type_flag(), header.filename());
VERIFY_NOT_REACHED();
}
// Non-global headers should be cleared after every file.
local_overrides.clear();
}
file_stream.close();
return {};
}
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