bm_scaffold_async_router/utils/deleteNouseFile.js

本木前端脚手架-异步路由版

// 删除无用的异步路由文件

const fs = require('fs');
const path = require('path');
const asyncRoutersPath = path.resolve(process.cwd(), 'dist/js');

// 循环方法封装
function circulation(arr, fn){
    let result = [];
    for(let i = 0, len = arr.length; i < len; i++){
        let returnVal = fn(arr[i], i);
        if(returnVal){
            result.push(returnVal);
        }
    }
    return result;
}
// 删除无用路由文件
module.exports = function delRouterFile(){
    return new Promise((resolve, reject) => {
        fs.readdir(asyncRoutersPath, function(err, files){
            if(err){
                console.log(err);
                reject(err);
                return;
            }
            let delFiles = [];
            circulation(files, (file) => {
                let result = [file];
                result = result.concat(circulation(files, (router) => {
                    if(file !== router){
                        let name = file.slice(0, file.indexOf('.'));
                        if(name && router.slice(0, router.indexOf('.')) === name){
                            return router;
                        }
                    }
                    return undefined;
                }));
                if(result.length <= 1){
                    return;
                }
                let mtimes = circulation(result, (item) => {
                    let stat = fs.statSync(asyncRoutersPath + '/' + item);
                    return +stat.mtime;
                })
                let max = Math.max.apply(null, mtimes);
                delFiles = delFiles.concat(circulation(mtimes, (mtime, index) => {
                    if(mtime !== max){
                        return asyncRoutersPath + '/' + result[index];
                    }
                    return undefined;
                }))
            })
            delFiles = [...new Set(delFiles)];
            circulation(delFiles, filePath => {
                fs.unlinkSync(filePath);
            })
            resolve();
        })
    })
}