Changing version and build number for a specific target Fastlane - swift

Question

I am trying to implement Fastlane into a Xcode project containing over 30 apps.
At this moment I am stuck with the lane that builds the app for the "AppStore" as it has to change the version and the build number for a specific target. The code for my lane is:
desc "Archives and creates the app for the AppStore"
lane :build_appstore do |options|
scheme = options[:scheme]
output_directory = options[:output_directory]
configuration = options[:configuration]
export_method = options[:export_method]
bundle_id = options[:bundle_id]
version = options[:version]
build = options[:build]
# Used for increment_version_number. Does it work?
ENV["APP_IDENTIFIER"] = options[:bundle_id]
increment_version_number(
version_number: version
)
increment_build_number(
build_number: build
)
gym(
scheme: scheme,
output_directory: output_directory,
configuration: configuration,
export_method: export_method
)
end
The lanes works but when I have a look at the project, I see that all targets have the version and build number changed which is a little but of inconvenient.
Any ideas??

Answer 1

I ended up create using xcodeproj ruby and I create the following lane:
# Sets the "VERSION" and "BUILD" number for a target
#
# #param args [Hash] Key value arguments. All the values are Strings. List:
# - target_name: The name of the target (REQUIRED)
# - version: The version number to be used (REQUIRED)
# - build: The build number to be used (REQUIRED)
#
desc "Sets the \"VERSION\" and \"BUILD\" number for a target"
lane :set_version_build_number do |args|
puts("\"set_version_build_number\" lane with ARGUMENTS: #{args}")
target_name = args[:target_name]
version = args[:version]
build = args[:build]
raise(StandardError, "Invalid ARGUMENTS for: \"set_version_build_number\" LANE") unless (
target_name != nil &&
version != nil &&
build != nil
)
puts("Variables:")
puts("\ttarget_name: #{target_name}")
puts("\tversion: #{version}")
puts("\tbuild: #{build}")
project_url = find_xcode_project()
raise(StandardError, "Invalid Xcode project for: \"set_version_build_number\" LANE") unless project_url != nil
project = Xcodeproj::Project.open(project_url)
xc_target = project.targets.find { |target| target.name == target_name }
raise(StandardError, "Invalid target for: \"set_version_build_number\" LANE") unless xc_target != nil
xc_target.build_configurations.each { |build_configuration|
build_configuration.build_settings["MARKETING_VERSION"] = version
build_configuration.build_settings["CURRENT_PROJECT_VERSION"] = build
}
project.save()
end