JRuby versus Camping: Round 2

As undoubtedly some of you have discovered while trying, JRuby doesn't run Camping anymore. The culprit is a small feature in Ruby that we don't support yet. For some reason this feature is the preferred idiom for option parsing and Camping 1.5 introduced it, which means that Camping 1.5 will fail miserably in JRuby right now. There are more or less two ways around it, though. The first one is easy; just use a Camping version that is

opts.on("-p", "--port NUM", "Port for web server (defaults to #{conf.port})")
     { |conf.port| }

To fix this particular instance, just change it into this:

opts.on("-p", "--port NUM", "Port for web server (defaults to #{conf.port})")
     { |v| conf.port=v }

Not much of a difference, really. On all places where assignment to a non-obvious node is done in the manner above, just replace it with a regular assignment, and Camping will run.

Now, we are planning on fixing this syntax, but there is much development going down right now, and this change requires some changes in the parser, which is always interesting. But it will be there.