|
| 1 | +# Plugify C++ Header Generator |
| 2 | + |
| 3 | +A Python tool that automatically generates C++ header files with type-safe bindings for Plugify plugins from JSON manifest files. |
| 4 | + |
| 5 | +## Overview |
| 6 | + |
| 7 | +This generator reads `.pplugin` JSON manifest files and produces corresponding C++ header files (`.hpp`) that provide: |
| 8 | +- Type-safe function wrappers |
| 9 | +- Enum definitions |
| 10 | +- Delegate (function pointer) type definitions |
| 11 | +- Automatic method pointer resolution |
| 12 | +- Doxygen-compatible documentation comments |
| 13 | + |
| 14 | +## Requirements |
| 15 | + |
| 16 | +- Python 3.10 or higher |
| 17 | +- Input: `.pplugin` JSON manifest file |
| 18 | +- Output: A directory for generated headers |
| 19 | + |
| 20 | +## Installation |
| 21 | + |
| 22 | +No installation required. Simply download the `generator.py` script and ensure it's executable: |
| 23 | + |
| 24 | +```bash |
| 25 | +chmod +x generator.py |
| 26 | +``` |
| 27 | + |
| 28 | +## Usage |
| 29 | + |
| 30 | +### Basic Syntax |
| 31 | + |
| 32 | +```bash |
| 33 | +python3 generator.py <manifest_path> <output_directory> [--override] |
| 34 | +``` |
| 35 | + |
| 36 | +### Arguments |
| 37 | + |
| 38 | +| Argument | Required | Description | |
| 39 | +|----------|----------|-------------| |
| 40 | +| `manifest_path` | Yes | Path to the `.pplugin` JSON manifest file | |
| 41 | +| `output_directory` | Yes | Directory where the generated header will be saved | |
| 42 | +| `--override` | No | Overwrite existing files (otherwise, script exits if file exists) | |
| 43 | + |
| 44 | +### Examples |
| 45 | + |
| 46 | +**Generate a header file:** |
| 47 | +```bash |
| 48 | +python3 generator.py my_plugin.pplugin ./output |
| 49 | +``` |
| 50 | + |
| 51 | +**Override existing files:** |
| 52 | +```bash |
| 53 | +python3 generator.py my_plugin.pplugin ./output --override |
| 54 | +``` |
| 55 | + |
| 56 | +**Result:** |
| 57 | +``` |
| 58 | +Header generated at: ./output/pps/my_plugin.hpp |
| 59 | +``` |
| 60 | + |
| 61 | +## Input Format |
| 62 | + |
| 63 | +The script expects a JSON manifest file with the following structure: |
| 64 | + |
| 65 | +```json |
| 66 | +{ |
| 67 | + "name": "my_plugin", |
| 68 | + "methods": [ |
| 69 | + { |
| 70 | + "name": "MyFunction", |
| 71 | + "description": "Does something useful", |
| 72 | + "retType": { |
| 73 | + "type": "int32", |
| 74 | + "description": "Return value description" |
| 75 | + }, |
| 76 | + "paramTypes": [ |
| 77 | + { |
| 78 | + "name": "value", |
| 79 | + "type": "float", |
| 80 | + "description": "Parameter description" |
| 81 | + } |
| 82 | + ] |
| 83 | + } |
| 84 | + ] |
| 85 | +} |
| 86 | +``` |
| 87 | + |
| 88 | +### Supported Types |
| 89 | + |
| 90 | +**Basic types:** `void`, `bool`, `char8`, `char16`, `int8`, `int16`, `int32`, `int64`, `uint8`, `uint16`, `uint32`, `uint64`, `ptr64`, `float`, `double`, `string`, `any`, `function` |
| 91 | + |
| 92 | +**Vector types:** `vec2`, `vec3`, `vec4`, `mat4x4` |
| 93 | + |
| 94 | +**Array types:** Add `[]` suffix (e.g., `int32[]`, `string[]`, `vec2[]`) |
| 95 | + |
| 96 | +**Special features:** |
| 97 | +- Enums with custom types |
| 98 | +- Delegates (function pointers) |
| 99 | +- Reference parameters (`"ref": true`) |
| 100 | +- Default parameter values |
| 101 | + |
| 102 | +## Output Format |
| 103 | + |
| 104 | +The generated header includes: |
| 105 | + |
| 106 | +```cpp |
| 107 | +#pragma once |
| 108 | + |
| 109 | +#include <plg/plugin.hpp> |
| 110 | +#include <plg/any.hpp> |
| 111 | +#include <cstdint> |
| 112 | + |
| 113 | +namespace my_plugin { |
| 114 | + // Enums |
| 115 | + enum class MyEnum : int32_t { /* ... */ }; |
| 116 | + |
| 117 | + // Delegates |
| 118 | + using MyCallback = void (*)(int32_t); |
| 119 | + |
| 120 | + // Function wrappers |
| 121 | + /** |
| 122 | + * @brief Does something useful |
| 123 | + * @function MyFunction |
| 124 | + * @param value (float): Parameter description |
| 125 | + * @return int32: Return value description |
| 126 | + */ |
| 127 | + inline int32_t MyFunction(float value) { |
| 128 | + using MyFunctionFn = int32_t (*)(float); |
| 129 | + static MyFunctionFn __func = nullptr; |
| 130 | + if (__func == nullptr) |
| 131 | + plg::GetMethodPtr2("my_plugin.MyFunction", |
| 132 | + reinterpret_cast<void**>(&__func)); |
| 133 | + return __func(value); |
| 134 | + } |
| 135 | +} |
| 136 | +``` |
| 137 | +
|
| 138 | +## Features |
| 139 | +
|
| 140 | +### Automatic Type Conversion |
| 141 | +- Converts JSON types to appropriate C++ types |
| 142 | +- Handles value types, references, and return types differently |
| 143 | +- Supports vectors with `plg::vector<T>` |
| 144 | +
|
| 145 | +### Name Sanitization |
| 146 | +- Automatically appends `_` to C++ reserved keywords |
| 147 | +- Prevents naming conflicts |
| 148 | +
|
| 149 | +### Documentation Generation |
| 150 | +- Creates Doxygen-style comments from JSON descriptions |
| 151 | +- Documents parameters and return types |
| 152 | +
|
| 153 | +### Duplicate Prevention |
| 154 | +- Tracks generated enums and delegates |
| 155 | +- Avoids duplicate definitions |
| 156 | +
|
| 157 | +## Error Handling |
| 158 | +
|
| 159 | +The script will exit with an error if: |
| 160 | +- Manifest file doesn't exist |
| 161 | +- Output directory doesn't exist |
| 162 | +- Output file already exists (without `--override`) |
| 163 | +- JSON parsing fails |
| 164 | +- Unsupported type is encountered |
| 165 | +
|
| 166 | +## Integration |
| 167 | +
|
| 168 | +Include the generated header in your C++ project: |
| 169 | +
|
| 170 | +```cpp |
| 171 | +#include "pps/my_plugin.hpp" |
| 172 | +
|
| 173 | +int main() { |
| 174 | + float result = my_plugin::MyFunction(3.14f); |
| 175 | + return 0; |
| 176 | +} |
| 177 | +``` |
| 178 | + |
| 179 | +## Troubleshooting |
| 180 | + |
| 181 | +**"Manifest file does not exist"** |
| 182 | +- Check the path to your `.pplugin` file |
| 183 | + |
| 184 | +**"Output directory does not exist"** |
| 185 | +- Create the output directory first: `mkdir -p output` |
| 186 | + |
| 187 | +**"Output file already exists"** |
| 188 | +- Use `--override` flag or delete existing file |
| 189 | + |
| 190 | +**"Unsupported type"** |
| 191 | +- Check that all types in your manifest are in the supported types list |
| 192 | + |
| 193 | +## Download Generator Script |
| 194 | + |
| 195 | +The generator script is available at: |
| 196 | +- **GitHub Repository:** https://github.com/untrustedmodders/plugify-module-cpp |
| 197 | +- **Direct Link:** https://raw.githubusercontent.com/untrustedmodders/plugify-module-cpp/main/generator/generator.py |
| 198 | + |
| 199 | +### Quick Download |
| 200 | + |
| 201 | +```bash |
| 202 | +# Using wget |
| 203 | +wget https://raw.githubusercontent.com/untrustedmodders/plugify-module-cpp/main/generator/generator.py |
| 204 | + |
| 205 | +# Using curl |
| 206 | +curl -O https://raw.githubusercontent.com/untrustedmodders/plugify-module-cpp/main/generator/generator.py |
| 207 | + |
| 208 | +# Make it executable |
| 209 | +chmod +x generator.py |
| 210 | +``` |
| 211 | + |
| 212 | +## License |
| 213 | + |
| 214 | +[Add license information] |
| 215 | + |
| 216 | +## Contributing |
| 217 | + |
| 218 | +For issues, feature requests, or contributions, please visit the GitHub repository. |
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