dmikester1 – 03-42 May 1

I have some code that I think I need to promisify.

await compressFolder(PNGFolder, PNGFolder + '/slides.zip');
    while (!fs.existsSync(PNGFolder + '/slides.zip')) {
      console.log('Zip file does not exist');
    }

await compressFolder(PNGFolder, PNGFolder + '/slides.zip');
    while (!fs.existsSync(PNGFolder + '/slides.zip')) {
      console.log('Zip file does not exist');
    }

The compressFolder function is supposed to create that zip file. But when I run my code, it just sits and continuously outputs 'Zip file does not exist' in what looks like a forever loop.

2 Replies

dmikester1OP•2y ago

I think the issue is that I need to promisify the compressFolder function. compressFolder looks like this:

export const compressFolder = async (srcDir, destFile) => {
  const start = Date.now();
  try {
    fs.readdir(srcDir, async function (error, files) {
      var totalFiles = files.length; // return the number of files
      const zip = await createZipFromFolder(srcDir);
      return zip
        .generateNodeStream({ streamFiles: true, compression: 'DEFLATE' })
        .pipe(fs.createWriteStream(destFile))
        .on('error', (err) => console.error('Error writing file', err.stack))
        .on('finish', () => {
          console.log('Zip written successfully:', Date.now() - start, 'ms');
          return { message: `Zip written successfully: ${Date.now() - start} ms`};
        }
        );
    });
  } catch (ex) {
    console.error('Error creating zip', ex);
  }
};

export const compressFolder = async (srcDir, destFile) => {
  const start = Date.now();
  try {
    fs.readdir(srcDir, async function (error, files) {
      var totalFiles = files.length; // return the number of files
      const zip = await createZipFromFolder(srcDir);
      return zip
        .generateNodeStream({ streamFiles: true, compression: 'DEFLATE' })
        .pipe(fs.createWriteStream(destFile))
        .on('error', (err) => console.error('Error writing file', err.stack))
        .on('finish', () => {
          console.log('Zip written successfully:', Date.now() - start, 'ms');
          return { message: `Zip written successfully: ${Date.now() - start} ms`};
        }
        );
    });
  } catch (ex) {
    console.error('Error creating zip', ex);
  }
};

reactibot•2y ago

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