• I have reviewed the documentation
• I have searched existing issues
• I am using the latest React Native version

When trying to install a project template from other place than published as a npm package (github forks, local filesystem, local tarfile, http server...) I can't be able to do it due to several problems. Debuging them, I get to the conclussion the problem is at

• lack of support to download a git project subpath (seems a problem in npm not supporting mono-repos)
• templateName gets not cleaned, file extension should be removed
• templateName can't be different of the package name at the template package.json file, correct name should be extracted once the template is installed
• when installed from npm, installPackage is just a concatenation of the string react-native-template- and the provided template name, not allowing to use scoped packages as templates. Provided template should be checked and splitted, and the scoped prefixed to the generated templateName

Environment

Environment:
  OS: Linux 4.13
  Node: 9.11.1
  Yarn: Not Found
  npm: 5.6.0
  Watchman: 4.9.0
  Xcode: N/A
  Android Studio: 3.1 AI-173.4697961

Packages: (wanted => installed)
  react: 16.3.1 => 16.3.1
  react-native: 0.55.2 => 0.55.2

Steps to Reproduce

Try to init a React Native project using a template from a git mono-repo, or from a local filesystem folder, or from a tarfile on the local filesystem or a web server, or from a scoped npm package.

Expected Behavior

All the provided methods should be able to correctly install the provided template.

Actual Behavior

All of them fails.