function getPackageName()

in packages/create-react-kotlin-app/createReactApp.js [406:451]

• 43 lines of code
• 5 McCabe index (conditional complexity)

function getPackageName(installPackage) {
  if (installPackage.indexOf('.tgz') > -1) {
    return getTemporaryDirectory()
      .then((obj) => {
        let stream;
        if (/^http/.test(installPackage)) {
          stream = hyperquest(installPackage);
        } else {
          stream = fs.createReadStream(installPackage);
        }
        return extractStream(stream, obj.tmpdir).then(() => obj);
      })
      .then((obj) => {
        const packageName = require(path.join(obj.tmpdir, 'package.json')).name;
        obj.cleanup();
        return packageName;
      })
      .catch((err) => {
        // The package name could be with or without semver version, e.g. react-scripts-0.2.0-alpha.1.tgz
        // However, this function returns package name only without semver version.
        console.log(
          `Could not extract the package name from the archive: ${err.message}`
        );
        const assumedProjectName = installPackage.match(
          /^.+\/(.+?)(?:-\d+.+)?\.tgz$/
        )[1];
        console.log(
          `Based on the filename, assuming it is "${chalk.cyan(
            assumedProjectName
          )}"`
        );
        return Promise.resolve(assumedProjectName);
      });
  } else if (installPackage.indexOf('git+') === 0) {
    // Pull package name out of git urls e.g:
    // git+https://github.com/mycompany/react-scripts.git
    // git+ssh://github.com/mycompany/react-scripts.git#v1.2.3
    return Promise.resolve(installPackage.match(/([^/]+)\.git(#.*)?$/)[1]);
  } else if (installPackage.indexOf('@') > 0) {
    // Do not match @scope/ when stripping off @version or @tag
    return Promise.resolve(
      installPackage.charAt(0) + installPackage.substr(1).split('@')[0]
    );
  }
  return Promise.resolve(installPackage);
}