On Thu, Aug 30, 2007 at 05:32:19PM +0800, Meng Kuan wrote:
Hi,
I am exploring the possibility of creating ruby bindings for libvirt. The only attempt I found after some searching is this:
http://www.cs.ucsb.edu/~ckrintz/racelab/jisha/
Following the SWIG method as described in the above URL, I have gotten to the following point:
[root@dell1 libvirt_ruby]# irb irb(main):001:0> require 'libvirt_ruby' => true irb(main):002:0> conn = Libvirt_ruby.virConnectOpenReadOnly("") => #<SWIG::TYPE_p__virConnect:0x2aaaaabc46c8> irb(main):003:0> dom = Libvirt_ruby.virDomainLookupByID(conn, 0) => #<SWIG::TYPE_p__virDomain:0x2aaaaabb5df8> irb(main):004:0> ret = Libvirt_ruby.virDomainGetInfo(dom, info) NameError: undefined local variable or method `info' for main:Object from (irb):4 irb(main):005:0>
I am not sure how to create and pass in a ptr to a virDomainInfo struct object into the virDomainGetInfo call within ruby.
Honnestly, I don't know ruby so no idea.
Note that I was trying to following the info1.c example on the libvirt website:
http://libvirt.org/examples/info1.c
As you can tell, this is the first time I am trying to create any sort of language bindings for a C library.
Some questions:
1. Is there a better way of creating ruby bindings for libvirt besides SWIG? If so, any pointers on what should be done?
There is a formal XML definition of the libvirt API http://libvirt.org/libvirt-api.xml The waythe python bindings are built is that a python script parses this XML and then generate the C and python modules needed for the bindings. I'm not sure this really helps you but at least this mean you don't have parse the C header files if you want to automate the process.
2. Alternatively I can try to make my ruby code use libvirt-python bindings as a python library. Has anyone done so? Any problems with this approach?
No idea. But I would be a bit worried about piling up layers like that, might work for you though.. Daniel -- Red Hat Virtualization group http://redhat.com/virtualization/ Daniel Veillard | virtualization library http://libvirt.org/ veillard@redhat.com | libxml GNOME XML XSLT toolkit http://xmlsoft.org/ http://veillard.com/ | Rpmfind RPM search engine http://rpmfind.net/