How could I duplicate/copy file in an automatized way with JavaScript?-CodePudding

I have an gif file that is stored in a directory call assets on my computer. I would like to create X amount of duplicates and they should be stored in the same directory and each of them should have a different file name.

Example:

I in the assets directory is the gif file call 0.gif I would like to duplicate this gif file 10 times and The duplicates should be called 1.gif, 2.gif, 3.R and so on.

CodePudding user response：

const fs = require("fs")
const filename = "index.js".split(".") //filename like 0.gif to gif
const times = 10 // number of times to duplicate

for(var int = 1; int < times; int  ){
    const newFilename = `${(parseInt(filename[0])   init)}.${filename[1]}`  //new filename like 0.gif to 1.gif
    copyFileSync(filename, newfilename)
}

use the write file and read file from the fs module and a simple for loop

CodePudding user response：

The simplest option is to use fs and using copyFile function available

const fs = require("fs");
const path = require("path");

let copyMultiple = (src, count) => {
 let initCount = 0;

 while (initCount < count) {
   initCount  ;// you can put this at bottom too acc to your needs
   const newFileName = `${initCount}_${initCount}${path.extname(src)}`;
   console.log(newFileName, "is new file name");
   fs.copyFile(src, newFileName, (error) => {
     // if errors comes
     if (error) {
       console.log(error);
     }
   });
 }
};
copyMultiple("1.gif", 3);

Another elegant way of doing this is

const util = require("util");
const fs = require("fs");
const path = require("path");
const copyFilePromise = util.promisify(fs.copyFile);

function copyFiles(srcFile, destDir, destFileNames) {
  return Promise.all(
    destFileNames.map((file) => {
      return copyFilePromise(srcFile, path.join(destDir, file));
    })
  );
}

const myDestinationFileNames = ["second.gif", "third.gif"];
const sourceFileName = "1.gif";

copyFiles(sourceFileName, "", myDestinationFileNames)
  .then(() => {
    console.log("Copying is Done");
  })
  .catch((err) => {
    console.log("Got and Error", error);
  });

Using this will also give upperhand of knowing when it is done.

You can read docs here

CodePudding user response：

not sure which framework you're on but fs.copyFile() is the standard way for node.js https://nodejs.org/api/fs.html#fscopyfilesrc-dest-mode-callback