Xcode 9.3 support.

[StarWars]

When trying to use generamba gen, against the projects created using Xcode 9.3 - the following error occurs:

/.rvm/gems/ruby-2.4.0/gems/xcodeproj-1.4.2/lib/xcodeproj/project.rb:217:in `initialize_from_file': [Xcodeproj] Unknown object version. (RuntimeError)

The source code of a project.rb file in line 217 shows that the problem is caused by the following version check:
if object_version.to_i > Constants::LAST_KNOWN_OBJECT_VERSION
where the object_version is a value found within the project.pbxproj, under the key objectVersion.
The Xcode 9.3 sets objectVersion to 50. Anything below is going to work.

[akonakov]

Just change the Project Document -> Project Format to Xcode-8.0-compatible or lower.

[ghost]

@gulzatique
Here it is

[StarWars]

In case you can't get rid of Input/Output files, or the above doesn't help. Try the following:
https://stackoverflow.com/a/37223332/1306884 with the git repository pointing to develop on https://github.com/strongself/Generamba
The develop branch already has an updated xcodeproj, that is capable of handling Xcode 10.0 compatible projects.
NOTE: You will have to edit the gemspec file after you've cloned the develop branch in case your bundler is newer than the 1.x versions.