281 lines
10 KiB
Rust
281 lines
10 KiB
Rust
use crate::{ShimConfig, Layout};
|
||
use anyhow::{Context, Result, anyhow, bail};
|
||
use mlua::{FromLua, Lua, StdLib, Table, Value};
|
||
use std::ffi::OsStr;
|
||
use std::path::Path;
|
||
use std::{env, fs};
|
||
/// 将 Path 转换为适合 Lua 使用的安全字符串路径
|
||
fn normalize_path_for_lua(path: &Path) -> String {
|
||
// 自动将 Windows UNC 规范路径转回传统路径
|
||
let simplified = dunce::simplified(path);
|
||
simplified.to_string_lossy().replace('\\', "/")
|
||
}
|
||
|
||
pub struct LuaRuntime {
|
||
lua: Lua,
|
||
}
|
||
|
||
impl LuaRuntime {
|
||
/// 初始化限定权限的 Lua 沙箱环境
|
||
pub fn new(layout: &Layout) -> Result<Self> {
|
||
// 只加载安全的标准库，剥离 os / io 等风险模块
|
||
let lua = Lua::new_with(
|
||
StdLib::TABLE | StdLib::STRING | StdLib::MATH | StdLib::PACKAGE,
|
||
mlua::LuaOptions::default(),
|
||
)
|
||
.context("初始化 Lua 失败")?;
|
||
|
||
let globals = lua.globals();
|
||
|
||
// 统一使用 POSIX 风格路径规范化路径字符串
|
||
let base_dir = normalize_path_for_lua(&layout.base_dir);
|
||
let tools_dir = normalize_path_for_lua(&layout.tools_dir);
|
||
|
||
// 1. 注入锚点变量 __SHIM_DIR__（shim 安装根目录）
|
||
globals
|
||
.set("__SHIM_DIR__", base_dir.clone())
|
||
.context("设置 __SHIM_DIR__ 环境变量失败")?;
|
||
|
||
// 2. 安全暴露 get_env 供配置读取环境变量
|
||
// 返回按平台路径分隔符拆分后的段数组（自动剥离引号包裹），
|
||
// 便于 PATH 等列表变量直接嵌入数组：PATH = { prefix, get_env("PATH") }
|
||
let get_env = lua
|
||
.create_function(|lua, key: String| -> mlua::Result<Table> {
|
||
// 缺失变量视为空字符串，拆分后得到空表（不贡献任何路径段）
|
||
let value = env::var_os(key).unwrap_or_default();
|
||
// 空输入返回空表；否则按平台分隔符拆分（split_paths 会剥离引号包裹）
|
||
if value.is_empty() {
|
||
return lua.create_table();
|
||
}
|
||
let table = lua.create_table()?;
|
||
for (i, p) in env::split_paths(&value).enumerate() {
|
||
// 3. 跨平台提取原始字节并转为 LuaString，保证 100% 无损
|
||
#[cfg(unix)]
|
||
let lua_str = {
|
||
use std::os::unix::ffi::OsStrExt;
|
||
lua.create_string(p.as_os_str().as_bytes())?
|
||
};
|
||
|
||
#[cfg(windows)]
|
||
let lua_str = {
|
||
// Windows 路径是 UTF-16，转成字符串或保持其字节表达
|
||
let s = p.to_string_lossy();
|
||
lua.create_string(s.as_bytes())?
|
||
};
|
||
|
||
table.set(i + 1, lua_str)?;
|
||
}
|
||
|
||
Ok(table)
|
||
})
|
||
.context("注册 get_env 函数失败")?;
|
||
|
||
globals
|
||
.set("get_env", get_env)
|
||
.context("挂载 get_env 全局函数失败")?;
|
||
|
||
// 3. 配置 package.path，确保 require 行为正常
|
||
if let Ok(package) = globals.get::<Table>("package") {
|
||
let _ = package.set("cpath", "");
|
||
let _ = package.set("loadlib", Value::Nil);
|
||
|
||
if let Ok(path) = package.get::<String>("path") {
|
||
let new_path = format!(
|
||
"{};{}/?.lua;{}/?/init.lua;{}/?.lua;{}/?/init.lua",
|
||
path, base_dir, base_dir, tools_dir, tools_dir
|
||
);
|
||
let _ = package.set("path", new_path);
|
||
}
|
||
}
|
||
|
||
// 4. 包装 require：配置模块缺失/加载失败时记录日志并跳过该条目，
|
||
// 而不是让整个 mimic.lua 解析失败（排查问题时日志可见）
|
||
let original_require: mlua::Function = globals
|
||
.get("require")
|
||
.context("获取内置 require 函数失败")?;
|
||
globals
|
||
.set("_rshim_original_require", &original_require)
|
||
.context("备份原始 require 函数失败")?;
|
||
|
||
let wrapped_require = lua
|
||
.create_function(|lua, module: String| -> mlua::Result<Value> {
|
||
let original: mlua::Function = lua.globals().get("_rshim_original_require")?;
|
||
match original.call::<Value>(module.clone()) {
|
||
Ok(value) => Ok(value),
|
||
Err(e) => {
|
||
tracing::warn!(
|
||
module = %module,
|
||
error = %e,
|
||
"配置模块加载失败，已跳过该条目（可在独立配置文件中定义）"
|
||
);
|
||
Ok(Value::Nil)
|
||
}
|
||
}
|
||
})
|
||
.context("创建包装版 require 函数失败")?;
|
||
|
||
globals
|
||
.set("require", wrapped_require)
|
||
.context("重载 require 函数失败")?;
|
||
|
||
Ok(Self { lua })
|
||
}
|
||
|
||
/// 执行指定脚本文件，直接返回完整的 Lua Table
|
||
pub fn eval_script<T: FromLua>(&self, path: impl AsRef<Path>) -> Result<T> {
|
||
let path = path.as_ref();
|
||
// println!("path {:?}", path);
|
||
let bytes =
|
||
fs::read(path).with_context(|| format!("无法读取配置文件: {}", path.display()))?;
|
||
|
||
let code = String::from_utf8(bytes).with_context(|| {
|
||
format!(
|
||
"{} 不是有效的 UTF-8 文件（请将 Lua 配置文件保存为 UTF-8 编码）",
|
||
path.display()
|
||
)
|
||
})?;
|
||
println!("code {:?}", code);
|
||
let chunk_name = format!("@{}", path.display());
|
||
|
||
self.lua
|
||
.load(&code)
|
||
.set_name(&chunk_name)
|
||
.eval::<T>()
|
||
// .map_err(|e| anyhow!(e.to_string()))
|
||
.with_context(|| format!("执行 Lua 配置文件失败: {}", path.display()))
|
||
}
|
||
|
||
}
|
||
|
||
#[cfg(test)]
|
||
mod tests {
|
||
use super::*;
|
||
use crate::Layout;
|
||
|
||
fn test_layout() -> Layout {
|
||
let root = std::env::temp_dir().join("rshim-test-layout");
|
||
Layout {
|
||
base_dir: root.clone(),
|
||
bin_dir: root.join("bin"),
|
||
tools_dir: root.join("tools"),
|
||
lua_file: Default::default(),
|
||
}
|
||
}
|
||
|
||
#[test]
|
||
fn missing_module_require_returns_nil() {
|
||
let runtime = LuaRuntime::new(&test_layout()).unwrap();
|
||
let value: Value = runtime
|
||
.lua
|
||
.load(r#"return require("rshim_test_no_such_module")"#)
|
||
.eval()
|
||
.unwrap();
|
||
assert!(matches!(value, Value::Nil));
|
||
}
|
||
|
||
#[test]
|
||
fn builtin_module_require_still_works() {
|
||
let runtime = LuaRuntime::new(&test_layout()).unwrap();
|
||
let value: Value = runtime
|
||
.lua
|
||
.load(r#"return pcall(require, "string")"#)
|
||
.eval()
|
||
.unwrap();
|
||
assert!(matches!(value, Value::Boolean(true)));
|
||
}
|
||
|
||
#[test]
|
||
fn get_env_returns_split_table() {
|
||
let runtime = LuaRuntime::new(&test_layout()).unwrap();
|
||
let value: Value = runtime
|
||
.lua
|
||
.load(r#"return get_env("PATH")"#)
|
||
.eval()
|
||
.unwrap();
|
||
let table = match value {
|
||
Value::Table(t) => t,
|
||
other => panic!("expected table, got {}", other.type_name()),
|
||
};
|
||
assert!(
|
||
table.raw_len() >= 1,
|
||
"PATH should have at least one segment"
|
||
);
|
||
|
||
// split_paths 会剥离引号包裹，拆分段不应再含双引号
|
||
for i in 1..=table.raw_len() {
|
||
let seg: String = table.raw_get(i).unwrap();
|
||
assert!(
|
||
!seg.contains('"'),
|
||
"segment should not contain quote: {seg:?}"
|
||
);
|
||
}
|
||
}
|
||
|
||
#[test]
|
||
fn get_env_missing_returns_empty_table() {
|
||
let runtime = LuaRuntime::new(&test_layout()).unwrap();
|
||
let value: Value = runtime
|
||
.lua
|
||
.load(r#"return get_env("RSHIM_TEST_NO_SUCH_VAR_12345")"#)
|
||
.eval()
|
||
.unwrap();
|
||
match value {
|
||
Value::Table(t) => assert_eq!(t.raw_len(), 0),
|
||
other => panic!("expected table, got {}", other.type_name()),
|
||
}
|
||
}
|
||
|
||
#[test]
|
||
fn path_with_get_env_joins_without_quote_error() {
|
||
// 复现用户场景：PATH = { base_dir .. "/tools/numa", get_env("PATH") }
|
||
// 宿主 PATH 即使含双引号，也应拆分后正常拼接，而不是报错
|
||
let runtime = LuaRuntime::new(&test_layout()).unwrap();
|
||
let cfg: ShimConfig = runtime
|
||
.lua
|
||
.load(
|
||
r#"
|
||
return {
|
||
target = __SHIM_DIR__ .. "/tools/numa/numa.exe",
|
||
args = { "--help" },
|
||
env = {
|
||
PATH = { __SHIM_DIR__ .. "/tools/numa", get_env("PATH") }
|
||
}
|
||
}
|
||
"#,
|
||
)
|
||
.eval()
|
||
.unwrap();
|
||
|
||
let path = cfg.env.get("PATH").unwrap().to_str().unwrap();
|
||
let prefix = std::env::temp_dir()
|
||
.join("rshim-test-layout")
|
||
.to_string_lossy()
|
||
.replace('\\', "/")
|
||
+ "/tools/numa;";
|
||
assert!(path.starts_with(&prefix), "unexpected PATH: {path}");
|
||
|
||
// 宿主 PATH 的段应被附加在配置前缀之后
|
||
let host = std::env::var("PATH").unwrap_or_default();
|
||
if !host.is_empty() {
|
||
let host_first = std::env::split_paths(&host)
|
||
.next()
|
||
.unwrap()
|
||
.to_string_lossy()
|
||
.into_owned();
|
||
assert!(
|
||
path.contains(&host_first),
|
||
"missing host PATH segment: {host_first}"
|
||
);
|
||
}
|
||
|
||
// 宿主 PATH 里引号包裹的畸形段（如 "D:\\...\\bin;"）应被原样保留，
|
||
// 而不是让整个配置加载失败
|
||
if host.contains('"') {
|
||
assert!(
|
||
path.contains('"'),
|
||
"quoted host segments should be preserved"
|
||
);
|
||
}
|
||
}
|
||
}
|