ruby on rails - Conditions on gem requirement -

ruby on rails - Conditions on gem requirement -

i prevent updating of gem on windows (rmagick), sticks 2.12.0 mswin32. still, coworker needs have gem on darwin install...

so, tried in gemfile:

if ruby_platform =~ /darwin/i gem 'rmagick', '~> 2.12.0' else gem 'rmagick', '=2.12.0.mswin32' end

but bundle install complaints.

what right way of handling properly?

you can't utilize conditionals on gemspec because gemspec serialized yaml, doesn't contain executable code.

i faced related problem in gemfile of local rails project (not gem).

currently, gemfile contains:

group :test ... # on mac os x gem 'rb-fsevent' if ruby_platform.include?("x86_64-darwin") gem 'ruby_gntp' if ruby_platform.include?("x86_64-darwin") # on linux gem 'rb-inotify' unless ruby_platform.include?("x86_64-darwin") gem 'libnotify' unless ruby_platform.include?("x86_64-darwin") end

this works (although ugly) developing on mac , linux systems.

but, stopped checking in gemfile.lock since changes every time developer different platform checks in code.

so, solution multi-platform gemfiles should solve problem gemfile.lock.

the other solutions building multiple .gemspec files each target os , alter both platform , dependencies each platform:

gemspec = gem::specification.new |s| s.platform = gem::platform::ruby end # here build normal gem # linux: gemspec.platform = "linux" gemspec.add_dependency ... # build newer gemspec ...

ruby-on-rails gemfile