Using the Xcodeproj Ruby Gem - open exising Xcode project, add a file to the project in the main group, add the file to the main target, and save the Xcode project file.

gistfile1.rb

# Open the existing Xcode project
project_file = product_name + '.xcodeproj'
project = Xcodeproj::Project.new(project_file)

# Add a file to the project in the main group
file_name = 'Message.m'
group_name = product_name
file = project.new_file(file_name, group_name)

# Add the file to the main target
main_target = project.targets.first
main_target.add_file_references([file])

# Save the project file
project.save_as(project_file)

Hi! How can I list all files/frameworks that were added to existed project?