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128 lines
3.1 KiB
128 lines
3.1 KiB
5 months ago
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# RT-Thread package.json 构建支持
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## 概述
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RT-Thread支持使用package.json来定义组件的构建配置，作为传统SConscript的简化替代方案。
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## 现有支持
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### package.json格式
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```json
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{
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"name": "hello",
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"description": "Hello World component for RT-Thread",
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"type": "rt-thread-component",
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"dependencies": ["RT_USING_HELLO"],
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"defines": [],
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"sources": [{
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"name": "src",
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"dependencies": [],
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"includes": ["."],
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"files": ["hello.c"]
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}]
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}
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```
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### 字段说明
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- **name**: 组件名称（必需）
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- **type**: 必须为"rt-thread-component"（必需）
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- **description**: 组件描述
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- **dependencies**: 全局依赖，数组形式的宏定义
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- **defines**: 全局宏定义
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- **sources**: 源文件组数组，每组可包含：
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- **name**: 源组名称
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- **dependencies**: 源组特定依赖
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- **includes**: 头文件搜索路径
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- **files**: 源文件列表（支持通配符）
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## 使用方式
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### 1. 在SConscript中使用
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方式一：使用PackageSConscript（推荐）
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```python
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from building import *
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objs = PackageSConscript('package.json')
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Return('objs')
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```
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方式二：直接调用BuildPackage
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```python
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Import('env')
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from package import BuildPackage
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objs = BuildPackage('package.json')
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Return('objs')
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```
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### 2. 目录结构示例
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```
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mycomponent/
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├── SConscript
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├── package.json
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├── mycomponent.c
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├── mycomponent.h
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└── src/
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└── helper.c
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```
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### 3. 完整示例
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package.json:
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```json
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{
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"name": "mycomponent",
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"description": "My RT-Thread component",
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"type": "rt-thread-component",
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"dependencies": ["RT_USING_MYCOMPONENT"],
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"defines": ["MY_VERSION=1"],
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"sources": [
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{
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"name": "main",
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"dependencies": [],
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"includes": ["."],
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"files": ["mycomponent.c"]
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},
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{
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"name": "helper",
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"dependencies": ["RT_USING_MYCOMPONENT_HELPER"],
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"includes": ["src"],
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"files": ["src/*.c"]
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}
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]
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}
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```
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## 工作原理
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1. **依赖检查**：首先检查全局dependencies，如果不满足则跳过整个组件
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2. **源组处理**：遍历sources数组，每个源组独立检查dependencies
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3. **路径处理**：includes相对路径基于package.json所在目录
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4. **文件匹配**：使用SCons的Glob函数处理文件通配符
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5. **构建调用**：最终调用DefineGroup创建构建组
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## 与DefineGroup的对比
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| 特性 | package.json | DefineGroup |
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|------|--------------|-------------|
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| 配置方式 | JSON文件 | Python代码 |
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| 依赖管理 | 结构化 | 函数参数 |
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| 源文件组织 | 分组管理 | 单一列表 |
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| 条件编译 | 源组级别 | 整体级别 |
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| 灵活性 | 中等 | 高 |
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| 易用性 | 高 | 中等 |
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## 最佳实践
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1. **简单组件优先使用package.json**：配置清晰，易于维护
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2. **复杂逻辑使用SConscript**：需要动态逻辑时使用传统方式
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3. **混合使用**：可以在同一项目中混用两种方式
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## 注意事项
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1. package.json必须是有效的JSON格式
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2. type字段必须为"rt-thread-component"
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3. 文件路径相对于package.json所在目录
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4. 依赖不满足时会静默跳过，不会报错
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5. 与RT-Thread构建系统完全集成，不支持独立构建
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