自定义构建任务写入文件

import { hspTasks } from '@ohos/hvigor-ohos-plugin'; 
import * as fs from 'fs'; 
  
export function generateColors(modulePath: string) { 
    const res = `src/main/resources/base/element/color.json` 
    const clazz = `src/main/ets/resources/Color.ets` 
    const src = `${modulePath}/${res}` 
    const dst = `${modulePath}/${clazz}` 
    const colors = JSON.parse(fs.readFileSync(src, 'utf-8')).color //读取json文件的内容 
    fs.writeFileSync(dst, ''); 
    const stream = fs.createWriteStream(dst, { flags: 'a' }) 
    stream.write('// This file is generated by GenerateResourcesPlugin\n') 
    stream.write(`// Colors original defined in ${res}\n`) 
    stream.write('class Color {\n') 
    colors.forEach((color) => { 
        stream.write(`  readonly ${color.name} = $r('app.color.${color.name}')\n`) //写入内容 
    }) 
    stream.write('}\n\n') 
    stream.write('const color = new Color()\n\n') 
    stream.write('export default color\n') 
    stream.end() 
} 
  
export function generateResources() { 
    return { 
        pluginId: 'GenerateResourcesPlugin', 
        apply(pluginContext) { 
            pluginContext.registerTask({ 
                name: 'generateResources', 
                run: (taskContext) => { 
                    generateColors(taskContext.modulePath) 
                }, 
                dependencies: [], 
                postDependencies: ['default@PreBuild'] 
            }) 
        } 
    } 
} 
  
export default { 
    system: hspTasks, 
    plugins: [generateResources()] 
}