angular-ide/lib/extract.js

Provides a seamless integration with the Angular IDE from the command-line for developers looking for an enhanced development experience with Angular.

const DecompressZip = require('decompress-zip');
const Rx = require('rxjs');

const fs = require('fs');

const zlib = require('zlib');
const tar = require('tar-fs');

const fStat = Rx.Observable.bindNodeCallback(fs.stat);

function zip(compressedFilePath$, destinationPath$) {
  return Rx.Observable.create((observer) => {
    compressedFilePath$.withLatestFrom(destinationPath$)
      .subscribe(([compressedFilePath, destinationPath]) => {
        const unzipper = new DecompressZip(compressedFilePath);

        unzipper.on('progress', (index, count) => {
          observer.next({ current: index, total: count });
        });
        unzipper.on('extract', () => {
          observer.complete();
        });

        unzipper.extract({ path: destinationPath });
      });
  }).share();
};

function tarGZ(compressedFilePath$, destinationPath$) {
  return Rx.Observable.create((observer) => {
    compressedFilePath$.combineLatest(destinationPath$)
      .subscribe(([compressedFilePath, destinationPath]) => {
        const gunzip = zlib.createGunzip();

        fStat(compressedFilePath)
          .subscribe(fileStats => {
            const fileSize = fileStats.size;

            const inp = fs.createReadStream(compressedFilePath);
            const tarExtract = tar.extract(destinationPath);

            tarExtract.on('finish', function() {
              observer.complete();
            });

            inp.pipe(gunzip).pipe(tarExtract);

            let readTotal = 0;

            inp.on('data', (data) => {
              readTotal += data.length;
              observer.next({
                current: readTotal,
                total: fileSize,
              });
            });

          });
      });
  }).share();
}

module.exports = function extract(compressedFilePath$, destinationPath$, osType){
  if (osType === 'Windows_NT') {
    return zip(compressedFilePath$, destinationPath$);
  } else {
    return tarGZ(compressedFilePath$, destinationPath$);
  }
};