* Link module into app's moudles folder * * @return {Promise}

* Parse output from `git show-ref` * * @api private * @return {Array<ShowRefInfo>}

* Figure out which version the user wishes to be installed.

* Spawn a git process with a logger. Reject non zero exit codes with * appropriate error types. * * @return {Promise}

* Tries to read an integer value out of a string, if it fails to match the * entire string, returns the original string instead

* Tries to read a number value out of a string, if it fails to match the * entire string, returns the original string instead

* @class ApplicationNotFoundError

* @class DestinationExistsError

* @class FatalGitError

* @class FileLockerError

* @class InvalidManifestError

* @class UnknownGitOption

* @class UnknownGitRevision

* @class UsageError

* Handle errors generated by git show-ref * * Promise will resolve with false if exited normally * * @api private * @return Promise<Boolean, Erro