Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
435 views
in Technique[技术] by (71.8m points)

ruby - Rubygems: How do I add platform-specific dependency?

I've a ruby gem that has different dependencies for each OS. I have to explicitly write all of them down:

On Mac OS X:

gem install livereload

on Linux:

gem install rb-inotify livereload

on Windows:

gem install eventmachine-win32 win32-changenotify win32-event livereload

Can I tweak a gemspec a bit so installation instructions would look like plain gem install livereload for every OS?

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

The proper way to do this is outlined here. Since the gemspec is evaluated at package time, you need to do it in a native extension. Don't worry, it's not that scary since its still just Ruby code (not compiling C or anything).

We are currently using this approach for some client tools for OpenShift (source). Then in your gemspec/Rakefile, instead of adding dependencies, you would add an extension. Note that the file needs to be named ext/mkrf_conf.rb for this to work.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...