是否有一种更简单的方法来复制文件夹及其所有内容，而无需手动执行一系列的fs。readir, fs。readfile, fs。writefile递归?
我只是想知道我是否错过了一个函数，理想情况下是这样工作的:
fs.copy("/path/to/source/folder", "/path/to/destination/folder");
关于这个历史问题。注意fs。Cp和fs。cpSync可以递归复制文件夹，在Node v16+中可用
当前回答
这在Node.js 10中非常简单:
const Path = require('path');
const FSP = require('fs').promises;
async function copyDir(src,dest) {
const entries = await FSP.readdir(src, {withFileTypes: true});
await FSP.mkdir(dest);
for(let entry of entries) {
const srcPath = Path.join(src, entry.name);
const destPath = Path.join(dest, entry.name);
if(entry.isDirectory()) {
await copyDir(srcPath, destPath);
} else {
await FSP.copyFile(srcPath, destPath);
}
}
}
这里假设dest不存在。
其他回答
这在Node.js 10中非常简单:
const Path = require('path');
const FSP = require('fs').promises;
async function copyDir(src,dest) {
const entries = await FSP.readdir(src, {withFileTypes: true});
await FSP.mkdir(dest);
for(let entry of entries) {
const srcPath = Path.join(src, entry.name);
const destPath = Path.join(dest, entry.name);
if(entry.isDirectory()) {
await copyDir(srcPath, destPath);
} else {
await FSP.copyFile(srcPath, destPath);
}
}
}
这里假设dest不存在。
是的，ncp很酷…
你可能想要/应该承诺它的功能，让它超级酷。当你这样做的时候，把它添加到一个工具文件中以重复使用它。
下面是一个工作版本，它是异步的，并使用承诺。
文件index.js
const {copyFolder} = require('./tools/');
return copyFolder(
yourSourcePath,
yourDestinationPath
)
.then(() => {
console.log('-> Backup completed.')
}) .catch((err) => {
console.log("-> [ERR] Could not copy the folder: ", err);
})
文件tools.js
const ncp = require("ncp");
/**
* Promise Version of ncp.ncp()
*
* This function promisifies ncp.ncp().
* We take the asynchronous function ncp.ncp() with
* callback semantics and derive from it a new function with
* promise semantics.
*/
ncp.ncpAsync = function (sourcePath, destinationPath) {
return new Promise(function (resolve, reject) {
try {
ncp.ncp(sourcePath, destinationPath, function(err){
if (err) reject(err); else resolve();
});
} catch (err) {
reject(err);
}
});
};
/**
* Utility function to copy folders asynchronously using
* the Promise returned by ncp.ncp().
*/
const copyFolder = (sourcePath, destinationPath) => {
return ncp.ncpAsync(sourcePath, destinationPath, function (err) {
if (err) {
return console.error(err);
}
});
}
module.exports.copyFolder = copyFolder;
对于Linux/Unix操作系统，可以使用shell语法
const shell = require('child_process').execSync;
const src = `/path/src`;
const dist = `/path/dist`;
shell(`mkdir -p ${dist}`);
shell(`cp -r ${src}/* ${dist}`);
就是这样!
打印稿版本
async function copyDir(source: string, destination: string): Promise<any> {
const directoryEntries = await readdir(source, { withFileTypes: true });
await mkdir(destination, { recursive: true });
return Promise.all(
directoryEntries.map(async (entry) => {
const sourcePath = path.join(source, entry.name);
const destinationPath = path.join(destination, entry.name);
return entry.isDirectory()
? copyDir(sourcePath, destinationPath)
: copyFile(sourcePath, destinationPath);
})
);
}
Mallikarjun M，谢谢!
fs-extra做了这件事，如果你不提供一个回调，它甚至可以返回一个承诺!:)
const path = require('path')
const fs = require('fs-extra')
let source = path.resolve( __dirname, 'folderA')
let destination = path.resolve( __dirname, 'folderB')
fs.copy(source, destination)
.then(() => console.log('Copy completed!'))
.catch( err => {
console.log('An error occurred while copying the folder.')
return console.error(err)
})
