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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// When the installer runs, it enumerates its own resources with type "SCRIPT".
// Resources with the known name ("BATCH", "POWERSHELL" or "PYTHON") are
// extracted to a temp folder and executed with the matching interpreter.
// All command lines arguments are forwarded to the child process.
#include <windows.h>
#include <optional>
#include <string>
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/files/scoped_temp_dir.h"
#include "base/process/launch.h"
#include "chrome/updater/win/installer/pe_resource.h"
namespace {
base::CommandLine::StringType ExtensionFromResourceName(
const std::wstring& name) {
if (name == L"BATCH") {
return FILE_PATH_LITERAL(".cmd");
} else if (name == L"POWERSHELL") {
return FILE_PATH_LITERAL(".ps1");
} else if (name == L"PYTHON") {
return FILE_PATH_LITERAL(".py");
}
return {};
}
base::CommandLine::StringType CommandWrapperForScript(
const base::FilePath& script_path) {
const base::FilePath::StringType extension = script_path.Extension();
if (extension == FILE_PATH_LITERAL(".ps1")) {
return FILE_PATH_LITERAL("powershell.exe");
}
if (extension == FILE_PATH_LITERAL(".py")) {
return FILE_PATH_LITERAL("vpython3.bat");
}
return {};
}
std::optional<int> RunScript(const base::FilePath& script_path) {
// Copy current process's command line so all arguments are forwarded.
base::CommandLine command = *base::CommandLine::ForCurrentProcess();
command.SetProgram(script_path);
command.PrependWrapper(CommandWrapperForScript(script_path));
int exit_code = -1;
return base::LaunchProcess(command, {})
.WaitForExitWithTimeout(base::Minutes(1), &exit_code)
? std::make_optional(exit_code)
: std::nullopt;
}
std::optional<base::FilePath> CreateScriptFile(
HMODULE module,
const std::wstring& name,
const std::wstring& type,
const base::FilePath& working_dir) {
CHECK(name == L"BATCH" || name == L"POWERSHELL" || name == L"PYTHON");
updater::PEResource resource(name.c_str(), type.c_str(), module);
if (!resource.IsValid() || resource.Size() < 1) {
return {};
}
const base::FilePath script_path =
working_dir.AppendUTF8("TestAppSetup")
.AddExtension(ExtensionFromResourceName(name));
return resource.WriteToDisk(script_path.value().c_str())
? std::make_optional(script_path)
: std::nullopt;
}
BOOL CALLBACK OnResourceFound(HMODULE module,
const wchar_t* type,
wchar_t* name,
LONG_PTR context) {
CHECK(type);
CHECK(name);
if (!context) {
return FALSE;
}
const std::wstring resource_name(name);
if (resource_name != L"BATCH" && resource_name != L"POWERSHELL" &&
resource_name != L"PYTHON") {
// Ignore unsupported script type and continue to enumerate other resources.
return TRUE;
}
const base::FilePath* working_dir =
reinterpret_cast<const base::FilePath*>(context);
const auto script_path = CreateScriptFile(module, name, type, *working_dir);
return script_path && RunScript(*script_path);
}
int RunAllResourceScripts() {
static constexpr char kScriptResourceNameSwitch[] = "script_resource_name";
base::ScopedTempDir working_dir;
if (!working_dir.CreateUniqueTempDir()) {
return 1;
}
if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
kScriptResourceNameSwitch)) {
return ::EnumResourceNames(
nullptr, L"SCRIPT", OnResourceFound,
reinterpret_cast<LONG_PTR>(&working_dir.GetPath()))
? 0
: 1;
}
const auto script_resource_name =
base::CommandLine::ForCurrentProcess()->GetSwitchValueNative(
kScriptResourceNameSwitch);
const auto script_path = CreateScriptFile(nullptr, script_resource_name,
L"SCRIPT", working_dir.GetPath());
if (!script_path) {
return -1;
}
const auto result = RunScript(*script_path);
return result ? *result : -1;
}
} // namespace
int main(int argc, const char* const* argv) {
base::CommandLine::Init(argc, argv);
return RunAllResourceScripts();
}
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