function getTemplateInstallPackage()

in packages/create-react-app/createReactApp.js [597:642]

• 32 lines of code
• 12 McCabe index (conditional complexity)

function getTemplateInstallPackage(template, originalDirectory) {
  let templateToInstall = 'cra-template';
  if (template) {
    if (template.match(/^file:/)) {
      templateToInstall = `file:${path.resolve(
        originalDirectory,
        template.match(/^file:(.*)?$/)[1]
      )}`;
    } else if (
      template.includes('://') ||
      template.match(/^.+\.(tgz|tar\.gz)$/)
    ) {
      // for tar.gz or alternative paths
      templateToInstall = template;
    } else {
      // Add prefix 'cra-template-' to non-prefixed templates, leaving any
      // @scope/ and @version intact.
      const packageMatch = template.match(/^(@[^/]+\/)?([^@]+)?(@.+)?$/);
      const scope = packageMatch[1] || '';
      const templateName = packageMatch[2] || '';
      const version = packageMatch[3] || '';

      if (
        templateName === templateToInstall ||
        templateName.startsWith(`${templateToInstall}-`)
      ) {
        // Covers:
        // - cra-template
        // - @SCOPE/cra-template
        // - cra-template-NAME
        // - @SCOPE/cra-template-NAME
        templateToInstall = `${scope}${templateName}${version}`;
      } else if (version && !scope && !templateName) {
        // Covers using @SCOPE only
        templateToInstall = `${version}/${templateToInstall}`;
      } else {
        // Covers templates without the `cra-template` prefix:
        // - NAME
        // - @SCOPE/NAME
        templateToInstall = `${scope}${templateToInstall}-${templateName}${version}`;
      }
    }
  }

  return Promise.resolve(templateToInstall);
}