跟着小白一起学鸿蒙--写个NAPI子系统（七）

graph LR
创建d.ts --> 执行napi_generator --> 建立子系统 --> 引入子系统 --> 编译生成

import {AsyncCallback} from './basic';
/**
 * Provides interfaces to napitest.
 *
 * @since 7
 */
declare namespace napitest {
  /**
   * Shuts down the system.
   *
   * <p>This method requires the ohos.permission.SHUTDOWN permission.
   *
   * @param reason Indicates the shutdown reason.
   * @systemapi
   * @since 7
   */
  function shutdownDevice(reason: string): void;
  /**
   * Restarts the system.
   *
   * <p>This method requires the ohos.permission.REBOOT permission.
   *
   * @param reason Indicates the restart reason. For example, "updater" indicates entering the updater mode
   * after the restart. If the parameter is not specified, the system enters the normal mode after the restart.
   * @since 7
   */
  function rebootDevice(reason: string): void;
  /**
   * Checks whether the screen of a device is on or off.
   *
   * @return Returns true if the screen is on; returns false otherwise.
   * @since 7
   */
  function isScreenOn(callback: AsyncCallback<boolean>): void;
  function isScreenOn(): Promise<boolean>;
}
export default napitest;

export interface Callback<T> {
    (data: T): void;
}  
export interface ErrorCallback<T extends Error = BusinessError> {
    (err: T): void;
}
export interface AsyncCallback<T> {
    (err: BusinessError, data: T): void;
}
export interface BusinessError extends Error {
    code: number;
}

//准备环境
mkdir napitest
cd napitest
vim @ohos.napitest.d.ts
vim basic.d.ts
//拷贝napi_generator
cp [路径]/napi_generator-linux .
chmod +x napi_generator-linux
//生成napitest代码
./napi_generator-linux -f @ohos.napitest.d.ts -o out
//当看到success则说明烧录成功

//检视out目录
├── binding.gyp     //工具中间文件
├── BUILD.gn      //之后需要用到的gn文件
├── napi_gen.log    //工具log
├── napitest.cpp    //自动生成的接口调用的实际代码
├── napitest.h      //自动生成的接口调用的实际代码
├── napitest_middle.cpp //自动生成的napi适配代码
├── test.sh       //生成js代码的脚本，官方没给说明，试了下不可用
├── tool_utility.cpp  //自动生成的napi适配代码
└── tool_utility.h    //自动生成的napi适配代码

foundation
├── ability
├── ai
├── arkui
├── barrierfree
├── bundlemanager
├── communication
├── deviceprofile
├── distributeddatamgr
├── distributedhardware
├── filemanagement
├── graphic
├── multimedia
├── multimodalinput
├── napitest
│   ├── binding.gyp
│   ├── BUILD.gn
│   ├── bundle.json
│   ├── napi_gen.log
│   ├── napitest.cpp
│   ├── napitest.h
│   ├── napitest_middle.cpp
│   ├── test.sh
│   ├── tool_utility.cpp
│   └── tool_utility.h
├── resourceschedule

{
    "name": "@ohos/napitest",
    "description": "napitest provides atomic capabilities",
    "version": "3.1",
    "license": "Apache License 2.0",
    "publishAs": "code-segment",
    "segment": {
      "destPath": "foundation/napitest"
    },
    "dirs": {},
    "scripts": {},
    "component": {
      //部件名称
      "name": "napitest_interface",
      //子系统名称
      "subsystem": "napitest",
      "features": [],
      "adapted_system_type": [
        "standard"
      ],
      "rom": "10000KB",
      "ram": "10000KB",
      "deps": {
        "components": [
          "ace_napi",
          "ipc_core",
          "libhilog"
        ],
        "third_party": [
          "node"
        ]
      },
      "build": {
        "sub_component": [
          "//foundation/napitest:napitest"
        ],
        "inner_kits": [
          {
            "header": {
              "header_base": "//foundation/napitest",
              "header_files": [
                "tool_utility.h",
                "napitest.h"
              ]
            },
            "name": "//foundation/napitest:napitest"
          }
        ]
      }
    }
  }

import("//build/ohos.gni")
ohos_shared_library("napitest")
{
    sources = [
        "napitest_middle.cpp",
        "napitest.cpp",
        "tool_utility.cpp",
    ]
    include_dirs = [
        ".",
        "//third_party/node/src",
        "//base/hiviewdfx/hilog/interfaces/native/innerkits/include",
    ]
    deps=[
        "//foundation/arkui/napi:ace_napi",
        "//base/hiviewdfx/hilog/interfaces/native/innerkits:libhilog",
    ]
    remove_configs = [ "//build/config/compiler:no_rtti" ]
    cflags=[
    ]
    cflags_cc=[
        "-frtti",
    ]
    ldflags = [
    ]    
    relative_install_dir = "module"
    //部件名称
    part_name = "napitest_interface"
    //子系统名称
    subsystem_name = "napitest"
}

//在文件后增加
{
  //前面省略的内容
  ...
  //新增内容
  "napitest": {
    "path": "foundation/napitest",
    "name": "napitest"
  }
}

//修改 vendor/hihope/[PRODUCT_NAME]/config.json 文件增加如下行
{
  "subsystem": "napitest",
  "components": [
  {
    "component": "napitest_interface",
    "features": []
  }
  ]
},

./build.sh --product-name PRODUCT_NAME
//看到success则为编译成功，可以通过find out/[PRODUCT_NAME] -name *napitest.z.so查看生成文件,比如我的文件路径如下：
./out/rk3568/lib.unstripped/napitest/napitest_interface/libnapitest.z.so
./out/rk3568/napitest/napitest_interface/libnapitest.z.so
./out/rk3568/innerkits/ohos-arm/napitest_interface/napitest/libnapitest.z.so
./out/rk3568/packages/phone/system/lib/module/libnapitest.z.so
//最后一个路径就是系统镜像的路径，所以两种办法
//1,直接copy到板子的/system/lib路径；参考《#跟着小白一起学鸿蒙# [二]第一个OpenHarmony程序》
//2,烧录镜像；参考《#跟着小白一起学鸿蒙# [一]运行OpenHarmony》