fix(config): 优化配置解析
- 完善 `FromLua` 转换与边界校验,拦截空洞 (`nil`) 及非整数键
This commit is contained in:
@@ -11,9 +11,9 @@ opt-level = "z"
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panic = "abort"
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[dependencies]
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thiserror = "2.0.20"
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anyhow = "1.0.104"
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mlua = { version = "0.12.0", features = ["lua54", "vendored"] }
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mlua = { version = "0.12.0", features = ["lua54", "vendored","send"] }
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windows-sys = { version = "0.61.2", features = [
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"Win32_Foundation",
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"Win32_System_Com",
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201
src/config.rs
201
src/config.rs
@@ -1,9 +1,10 @@
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use mlua::{FromLua, Lua, LuaString, ObjectLike, Table, Value};
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use mlua::{FromLua, Lua, LuaString, Table, Value};
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use std::collections::HashMap;
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use std::ffi::OsString;
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use std::fmt;
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use std::fmt::Display;
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use std::path::PathBuf;
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use std::process::Command;
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/// 构造一个带上下文的 FromLua 转换错误,便于定位配置问题
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fn conversion_error(message: impl Into<String>) -> mlua::Error {
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mlua::Error::FromLuaConversionError {
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@@ -13,8 +14,8 @@ fn conversion_error(message: impl Into<String>) -> mlua::Error {
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}
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}
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/// 将 Lua 字符串转为 Rust 字符串;非 UTF-8 字节替换为 U+FFFD 并告警
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fn lua_string_to_os_string(s: LuaString) -> Result<OsString, mlua::Error> {
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/// 将 Lua 字符串转为 Rust 字符串;非 UTF-8 按系统默认的 ANSI/OEM (如 GBK) 进行安全解码
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fn lua_string_2_os_string(s: LuaString) -> mlua::Result<OsString> {
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let raw_bytes = &s.as_bytes().to_vec();
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// 1. Unix 平台:直接零拷贝透传原始字节(无损支持任意编码)
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#[cfg(unix)]
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@@ -42,7 +43,7 @@ fn lua_string_to_os_string(s: LuaString) -> Result<OsString, mlua::Error> {
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}
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/// 按连续整数下标遍历表的序列部分;存在空洞或非序列键时返回错误,避免静默截断
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fn for_each_sequence_item(
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fn validate_each_sequence_item(
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tbl: &Table,
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mut f: impl FnMut(Value) -> mlua::Result<()>,
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) -> mlua::Result<()> {
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@@ -70,9 +71,63 @@ fn for_each_sequence_item(
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}
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Ok(())
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}
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/// 值分流与上下文分发枚举
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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pub enum ValueShunt {
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/// 命令行参数元素:仅支持一维基础标量,禁止嵌套 Table
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Args,
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/// 环境变量值:支持基础标量及多维嵌套 Table(递归展平)
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Env,
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}
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impl Display for ValueShunt {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match self {
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Self::Args => write!(f, "命令行参数 (args)"),
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Self::Env => write!(f, "环境变量 (env)"),
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}
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}
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}
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impl ValueShunt {
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fn expected_types_desc(&self) -> &str {
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match self {
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Self::Args => "string/number/boolean(不支持嵌套数组)",
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Self::Env => "string/number/boolean 或包含这些类型的数组/嵌套数组",
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}
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}
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/// 递归/标量收集实现
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pub fn collect_into(&self, value: Value, out: &mut Vec<OsString>) -> mlua::Result<()> {
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match value {
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Value::Nil => {}
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Value::String(s) => out.push(lua_string_2_os_string(s)?),
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Value::Integer(i) => out.push(OsString::from(i.to_string())),
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Value::Number(n) => {
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tracing::warn!(context = %self, value = %n, "浮点数将按十进制格式转换为字符串");
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out.push(OsString::from(n.to_string()));
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}
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Value::Boolean(b) => {
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tracing::warn!(context = %self, value = %b, "布尔值将转换为字符串");
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out.push(OsString::from(b.to_string()));
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}
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// 嵌套 Table 仅在 EnvValue 下允许递归展开(支持 get_env("PATH") 等返回的子表)
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Value::Table(tbl) if *self == Self::Env => {
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validate_each_sequence_item(&tbl, |item| self.collect_into(item, out))?;
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}
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other => {
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return Err(conversion_error(format!(
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"{} 不支持类型 {}(仅支持 {})",
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self,
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other.type_name(),
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self.expected_types_desc()
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)));
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}
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}
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Ok(())
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}
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}
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/// 校验环境变量名的合法性(Windows 约束:非空、不含 '='、不含 NUL)
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fn validate_env_key(key: &str) -> mlua::Result<()> {
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fn validate_env_var_name(key: &str) -> mlua::Result<()> {
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if key.is_empty() {
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return Err(conversion_error("环境变量名不能为空"));
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}
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@@ -92,10 +147,10 @@ fn validate_env_key(key: &str) -> mlua::Result<()> {
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}
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/// 递归将任意 Lua Value 展开为扁平的字符串片段列表
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fn collect_env_strings(value: Value, out: &mut Vec<OsString>) -> mlua::Result<()> {
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fn collect_env_segments(value: Value, out: &mut Vec<OsString>) -> mlua::Result<()> {
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match value {
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// 1. 字符串
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Value::String(s) => out.push(lua_string_to_os_string(s)?),
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Value::String(s) => out.push(lua_string_2_os_string(s)?),
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// 2. 整数与浮点数
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Value::Integer(i) => out.push(OsString::from(i.to_string())),
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Value::Number(n) => {
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@@ -108,7 +163,9 @@ fn collect_env_strings(value: Value, out: &mut Vec<OsString>) -> mlua::Result<()
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out.push(OsString::from(b.to_string()));
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}
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// 4. 表/数组:必须是连续整数下标的纯序列,递归解包(支持任意深度的嵌套数组)
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Value::Table(tbl) => for_each_sequence_item(&tbl, |item| collect_env_strings(item, out))?,
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Value::Table(tbl) => {
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validate_each_sequence_item(&tbl, |item| collect_env_segments(item, out))?
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}
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// 5. 安全忽
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// 略 nil
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Value::Nil => {}
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@@ -170,7 +227,7 @@ impl FromLua for ShimConfig {
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// 必填字段: target(严格限定为字符串,避免数字被 mlua 宽松转为字符串后掩盖错误)
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let target = match table.get::<Value>("target")? {
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Value::String(s) => lua_string_to_os_string(s)?,
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Value::String(s) => lua_string_2_os_string(s)?,
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Value::Nil => {
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return Err(conversion_error("缺少必填字段 target(应为字符串路径)"));
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}
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@@ -181,90 +238,76 @@ impl FromLua for ShimConfig {
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)));
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}
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};
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let mut args = Vec::new();
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// 可选字段: args(缺失或 nil 时默认空列表;保留空字符串参数,与提权路径的 "" 语义一致)
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// let args = match table.get::<Option<Value>>("args")? {
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// None => Vec::new(),
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// Some(Value::Table(tbl)) => {
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// let mut args = Vec::new();
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// for_each_sequence_item(&tbl, |item| match item {
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// Value::String(s) => {
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// args.push(lua_string_to_string(s));
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// Ok(())
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// }
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// other => Err(conversion_error(format!(
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// "args 数组元素必须是字符串,实际是 {}",
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// other.type_name()
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// ))),
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// })?;
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// args
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// }
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let args = match table.get::<Option<Value>>("args")? {
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None => Vec::new(),
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match table.get::<Option<Value>>("args")? {
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None | Some(Value::Nil) => {}
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Some(Value::Table(tbl)) => {
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let mut args = Vec::new();
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for_each_sequence_item(&tbl, |item| match item {
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Value::String(s) => {
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args.push(lua_string_to_os_string(s)?);
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Ok(())
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}
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other => Err(conversion_error(format!(
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"args 数组元素必须是字符串,实际是 {}",
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other.type_name()
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))),
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validate_each_sequence_item(&tbl, |item| {
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ValueShunt::Args.collect_into(item, &mut args)
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})?;
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args
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}
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Some(other) => {
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return Err(conversion_error(format!(
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"args 必须是字符串数组,实际是 {}",
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"args 必须是数组列表,实际类型是 {}",
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other.type_name()
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)));
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}
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};
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// 可选字段: env(只允许缺失/nil,其他类型由 Option<Table> 转换报错,不再静默忽略)
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let env_table = table.get::<Option<Table>>("env")?;
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let env_table = table.get::<Option<Value>>("env")?;
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println!("env_table:{:?}", env_table);
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let mut env = HashMap::new();
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if let Some(env_table) = env_table {
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for pair in env_table.pairs::<String, Value>() {
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let (key, value) = pair?;
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validate_env_key(&key)?;
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match env_table {
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None | Some(Value::Nil) => {}
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Some(Value::Table(tbl)) => {
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for pair in tbl.pairs::<String, Value>() {
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let (name, value) = pair?;
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validate_env_var_name(&name)?;
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let mut parts = Vec::new();
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collect_env_strings(value, &mut parts)?;
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let mut parts = Vec::new();
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ValueShunt::Env.collect_into(value, &mut parts)?;
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// 空数组/空串也显式设置(空值表示清空该变量),
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// 与“未配置该变量(继承宿主环境)”相区分
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let joined_os_str = std::env::join_paths(parts).map_err(|e| {
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conversion_error(format!(
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"环境变量 [{}] 的值无法用系统路径分隔符拼接: {}",
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key, e
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))
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})?;
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println!("环境变量拼接结果:{:?}", joined_os_str);
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// 检查是否包含非法 NUL 字符
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#[cfg(unix)]
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{
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use std::os::unix::ffi::OsStrExt;
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if joined_os_str.as_bytes().contains(&0) {
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return Err(conversion_error(format!(
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"环境变量 [{}] 的值不能包含 NUL 字符",
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key
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)));
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// 空数组/空串也显式设置(空值表示清空该变量),
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// 与“未配置该变量(继承宿主环境)”相区分
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let joined_os_str = std::env::join_paths(parts).map_err(|e| {
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conversion_error(format!(
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"环境变量 [{}] 的值无法用系统路径分隔符拼接: {}",
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name, e
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))
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})?;
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println!("环境变量拼接结果:{:?}", joined_os_str);
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// 检查是否包含非法 NUL 字符
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#[cfg(unix)]
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{
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use std::os::unix::ffi::OsStrExt;
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if joined_os_str.as_bytes().contains(&0) {
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return Err(conversion_error(format!(
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"环境变量 [{}] 的值不能包含 NUL 字符",
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key
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)));
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}
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}
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}
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#[cfg(windows)]
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{
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use std::os::windows::ffi::OsStrExt;
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if joined_os_str.encode_wide().any(|c| c == 0) {
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return Err(conversion_error(format!(
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"环境变量 [{}] 的值不能包含 NUL 字符",
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key
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)));
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#[cfg(windows)]
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{
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use std::os::windows::ffi::OsStrExt;
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if joined_os_str.encode_wide().any(|c| c == 0) {
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return Err(conversion_error(format!(
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"环境变量 [{}] 的值不能包含 NUL 字符",
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name
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)));
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}
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}
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}
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env.insert(key, joined_os_str);
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env.insert(name, joined_os_str);
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}
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}
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Some(other) => {
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return Err(conversion_error(format!(
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"env 必须是键值表 (table),实际类型是 {}",
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other.type_name()
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)));
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}
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}
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println!("环境变量结果:{:?}", env);
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@@ -315,7 +358,11 @@ mod tests {
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PATH = { "C:/tools/git/bin", "C:/Windows",get_env("PATH") },
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HOME = "C:/tools/home",
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CONST = 3,
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BOOL = true
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BOOL = true,
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MUT ={
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A=3,
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B=true
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}
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}
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}
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"#,
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26
src/error.rs
26
src/error.rs
@@ -1,26 +0,0 @@
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use thiserror::Error; // 推荐引入 thiserror 库,若不使用可手动实现 std::fmt::Display
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#[derive(Debug, Error)]
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pub enum ShimError {
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#[error("路径解析失败: {0}")]
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PathResolution(String),
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#[error("获取环境信息失败: {0}")]
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Environment(String),
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#[error("配置文件未找到: {0}")]
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ConfigMissing(String),
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#[error("Lua 运行时/语法错误 [{file}]: {source}")]
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LuaExecution {
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file: String,
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#[source]
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source: mlua::Error,
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},
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#[error("配置格式非法: {0}")]
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InvalidConfig(String),
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#[error("IO 错误: {0}")]
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Io(#[from] std::io::Error),
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}
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@@ -1,4 +1,4 @@
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use crate::error::ShimError;
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use anyhow::{Context, Result, bail};
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use std::path::{Path, PathBuf};
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pub struct ShimLayout {
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@@ -9,27 +9,18 @@ pub struct ShimLayout {
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impl ShimLayout {
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/// 从当前可执行文件解析 shim 安装目录布局
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pub fn from_executable(exe_path: impl AsRef<Path>) -> Result<Self, ShimError> {
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pub fn from_executable(exe_path: impl AsRef<Path>) -> Result<Self> {
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let exe_path = exe_path.as_ref();
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let bin_dir = exe_path
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.parent()
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.ok_or_else(|| {
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ShimError::PathResolution(format!(
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"无法获取程序 [{}] 的父级 bin 目录",
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exe_path.display()
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))
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})?
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.with_context(|| format!("无法获取程序 [{}] 的父级 bin 目录", exe_path.display()))?
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.to_path_buf();
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eprintln!("bin_dir目录 {}", bin_dir.display());
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let root_dir = bin_dir
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.parent()
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.ok_or_else(|| {
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ShimError::PathResolution(format!(
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"无法获取 bin 目录 [{}] 的父级 root 目录",
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bin_dir.display()
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))
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})?
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.with_context(|| format!("无法获取 bin 目录 [{}] 的父级 root 目录", bin_dir.display()))?
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.to_path_buf();
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eprintln!("root_dir 目录 {}", root_dir.display());
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@@ -1,12 +1,10 @@
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mod config;
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mod error;
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mod layout;
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mod logger;
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mod runtime;
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mod shim;
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pub use config::ShimConfig;
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pub use error::ShimError;
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pub use layout::ShimLayout;
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pub use runtime::LuaRuntime;
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pub use shim::Shim;
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@@ -1,5 +1,5 @@
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use crate::error::ShimError;
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use crate::{ShimConfig, ShimLayout};
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use anyhow::{Context, Result, anyhow, bail};
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use mlua::{FromLua, Lua, StdLib, Table, Value};
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use std::ffi::OsStr;
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use std::path::Path;
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@@ -17,13 +17,13 @@ pub struct LuaRuntime {
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impl LuaRuntime {
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/// 初始化限定权限的 Lua 沙箱环境
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pub fn new(layout: &ShimLayout) -> Result<Self, ShimError> {
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pub fn new(layout: &ShimLayout) -> Result<Self> {
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// 只加载安全的标准库,剥离 os / io 等风险模块
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let lua = Lua::new_with(
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StdLib::TABLE | StdLib::STRING | StdLib::MATH | StdLib::PACKAGE,
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mlua::LuaOptions::default(),
|
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)
|
||||
.map_err(|e| ShimError::Environment(format!("初始化 Lua 失败: {}", e)))?;
|
||||
.context("初始化 Lua 失败")?;
|
||||
|
||||
let globals = lua.globals();
|
||||
|
||||
@@ -34,7 +34,7 @@ impl LuaRuntime {
|
||||
// 1. 注入锚点变量 __SHIM_DIR__(shim 安装根目录)
|
||||
globals
|
||||
.set("__SHIM_DIR__", root_dir.clone())
|
||||
.map_err(|e| ShimError::Environment(e.to_string()))?;
|
||||
.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),
|
||||
@@ -68,11 +68,11 @@ impl LuaRuntime {
|
||||
|
||||
Ok(table)
|
||||
})
|
||||
.map_err(|e| ShimError::Environment(e.to_string()))?;
|
||||
.context("注册 get_env 函数失败")?;
|
||||
|
||||
globals
|
||||
.set("get_env", get_env)
|
||||
.map_err(|e| ShimError::Environment(e.to_string()))?;
|
||||
.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") {
|
||||
@@ -92,10 +92,10 @@ impl LuaRuntime {
|
||||
// 而不是让整个 shims.lua 解析失败(排查问题时日志可见)
|
||||
let original_require: mlua::Function = globals
|
||||
.get("require")
|
||||
.map_err(|e| ShimError::Environment(format!("获取 require 失败: {}", e)))?;
|
||||
.context("获取内置 require 函数失败")?;
|
||||
globals
|
||||
.set("_rshim_original_require", &original_require)
|
||||
.map_err(|e| ShimError::Environment(e.to_string()))?;
|
||||
.context("备份原始 require 函数失败")?;
|
||||
|
||||
let wrapped_require = lua
|
||||
.create_function(|lua, module: String| -> mlua::Result<Value> {
|
||||
@@ -112,26 +112,27 @@ impl LuaRuntime {
|
||||
}
|
||||
}
|
||||
})
|
||||
.map_err(|e| ShimError::Environment(e.to_string()))?;
|
||||
.context("创建包装版 require 函数失败")?;
|
||||
|
||||
globals
|
||||
.set("require", wrapped_require)
|
||||
.map_err(|e| ShimError::Environment(e.to_string()))?;
|
||||
.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, ShimError> {
|
||||
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)?;
|
||||
let code = String::from_utf8(bytes).map_err(|e| {
|
||||
ShimError::InvalidConfig(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(),
|
||||
e.utf8_error()
|
||||
))
|
||||
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());
|
||||
@@ -140,15 +141,13 @@ impl LuaRuntime {
|
||||
.load(&code)
|
||||
.set_name(&chunk_name)
|
||||
.eval::<T>()
|
||||
.map_err(|e| ShimError::LuaExecution {
|
||||
file: path.display().to_string(),
|
||||
source: e,
|
||||
})
|
||||
// .map_err(|e| anyhow!(e.to_string()))
|
||||
.with_context(|| format!("执行 Lua 配置文件失败: {}", path.display()))
|
||||
}
|
||||
|
||||
// /// 将 Lua Value 解析转化为 ShimConfig 数据对象
|
||||
// pub fn parse_config(&self, value: Value) -> Result<ShimConfig, ShimError> {
|
||||
// ShimConfig::from_lua(value, &self.lua).map_err(|e| ShimError::InvalidConfig(e.to_string()))
|
||||
// pub fn parse_config(&self, value: Value) -> Result<ShimConfig, Error> {
|
||||
// ShimConfig::from_lua(value, &self.lua).map_err(|e| Error::InvalidConfig(e.to_string()))
|
||||
// }
|
||||
}
|
||||
|
||||
|
||||
36
src/shim.rs
36
src/shim.rs
@@ -1,28 +1,19 @@
|
||||
use crate::ShimError;
|
||||
use crate::{LuaRuntime, ShimConfig, ShimLayout};
|
||||
use anyhow::{Context, Result, bail};
|
||||
use mlua::{Table, Value};
|
||||
use std::{
|
||||
env,
|
||||
io::{Error, ErrorKind},
|
||||
};
|
||||
use std::env;
|
||||
use tracing::{debug, trace, warn};
|
||||
pub struct Shim;
|
||||
|
||||
impl Shim {
|
||||
pub fn load() -> Result<ShimConfig, ShimError> {
|
||||
let current_exe = env::current_exe()
|
||||
.map_err(|e| Error::new(ErrorKind::Other, format!("获取代理程序路径失败: {}", e)))?;
|
||||
pub fn load() -> Result<ShimConfig> {
|
||||
let current_exe = env::current_exe().context("获取代理程序路径失败: {}")?;
|
||||
debug!("当前目录 {}", current_exe.display());
|
||||
|
||||
let target_name = current_exe
|
||||
.file_stem()
|
||||
.and_then(|s| s.to_str())
|
||||
.ok_or_else(|| {
|
||||
ShimError::PathResolution(format!(
|
||||
"无法从路径 [{}] 提取有效的程序名称",
|
||||
current_exe.display()
|
||||
))
|
||||
})?
|
||||
.with_context(|| format!("无法从路径 [{}] 提取有效的程序名称", current_exe.display()))?
|
||||
.to_lowercase();
|
||||
debug!(
|
||||
target_name = %target_name,
|
||||
@@ -47,7 +38,7 @@ impl Shim {
|
||||
runtime: &LuaRuntime,
|
||||
paths: &ShimLayout,
|
||||
target_name: &str,
|
||||
) -> Result<ShimConfig, ShimError> {
|
||||
) -> Result<ShimConfig> {
|
||||
// 策略 1: 尝试加载全局配置文件 shims.lua
|
||||
let global_config = paths.root_dir.join("rshim.lua");
|
||||
if global_config.is_file() {
|
||||
@@ -57,11 +48,11 @@ impl Shim {
|
||||
// 检查 shims.lua 中是否存在以 target_name 命名的 Table 节点
|
||||
if root_table
|
||||
.contains_key(target_name)
|
||||
.map_err(|e| ShimError::InvalidConfig(format!("检查全局配置失败: {}", e)))?
|
||||
.context("检查全局配置失败")?
|
||||
{
|
||||
let target_val: ShimConfig = root_table.get(target_name).map_err(|e| {
|
||||
ShimError::InvalidConfig(format!("解析配置 [{}] 失败: {}", target_name, e))
|
||||
})?;
|
||||
let target_val: ShimConfig = root_table
|
||||
.get(target_name)
|
||||
.with_context(|| format!("解析配置 [{}] 失败: ", target_name))?;
|
||||
debug!(
|
||||
target = %target_name,
|
||||
source = %global_config.display(),
|
||||
@@ -92,9 +83,10 @@ impl Shim {
|
||||
|
||||
// 策略 3: 所有查找失败,抛出错误
|
||||
warn!(target = %target_name, "未找到任何匹配的配置文件");
|
||||
Err(ShimError::ConfigMissing(format!(
|
||||
bail!(
|
||||
"未找到关于 '{}' 的配置。请检查 shims.lua 或特定的 {}.lua 文件",
|
||||
target_name, target_name
|
||||
)))
|
||||
target_name,
|
||||
target_name
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user