NW.js使用nw-builder构建打包报错：Could not find a package.json in your src folder

错误描述：
NW.js应用使用nw-builder构建打包时，报错：The promise rejected with the reason "Could not find a package.json in your src folder".] {code: 'ERR_UNHANDLED_REJECTION'}

具体报错日志如下：

D:\whw\study\nwjs\test2>npm run build

> firstapp@1.0.0 build
> nwbuild src/ --platforms win32,win64,osx64,linux32,linux64 --buildDir dist/

node:internal/process/promises:246
          triggerUncaughtException(err, true /* fromPromise */);
          ^

[UnhandledPromiseRejection: This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). The promise rejected with the reason "Could not find a package.json in your src folder".] {
  code: 'ERR_UNHANDLED_REJECTION'
}

D:\whw\study\nwjs\test2>

解决方法：

从报错上看，是nwbuild找不到package.json文件，根据nw-builder文档修改package.json配置中build命令src目录参数后OK。

nwbuild src/ --platforms win32,win64 --buildDir dist/
修改为：
nwbuild ./src/**/* --platforms win32,win64 --buildDir dist/ --mode=build

完整的package.json内容如下：

{
    "name": "helloworld",
    "main": "index.html",
    "version": "0.0.1",
    "description": "first Nw.js Demo",
    "scripts": {
        "dev": "nw .",
        "build": "nwbuild ./src/**/* --platforms win32,win64 --buildDir dist/ --mode=build"
    },
    "devDependencies": {
        "nw": "^0.18.3",
        "nw-builder": "^3.1.2"
    },
    "author": "",
    "license": "ISC"
}

修改后即可正常构建打包：

D:\whw\study\nwjs\test2>npm run build

> firstapp@1.0.0 build
> nwbuild ./src/**/* --platforms win32,win64 --buildDir dist/ --mode=build

 ■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■ 100% | ETA: 0s | 148164619/14816461
 ■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■ 100% | ETA: 0s | 172396170/17239617
 
D:\whw\study\nwjs\test2>

参考文档：
nw-builder
https://nwutils.io/nw-builder/getting-started

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