Nokogiri is awesome. I can do things like #css('.bla')
which will return the first matching element.
Right now we need to do some parsing of Ruby source code - finding all methods within a class etc. We're using the ruby_parser gem, but all it does is comb your source code and spit out S-expressions. Is there anything like Nokogiri for these S-expressions which can do things like "return S-expression for first method found named 'foo'"?
The only thing I can think of, is Adam Sanderson's SExpPath
library.
Although I am accepting Jörg's answer because it is more complete, I ended up discovering something else which I ended up using. ruby_parser installs a dependent gem named sexp_processor (it is in this gem where the Sexp
class is actually defined). If you view the class docs there are a few methods that will help with basic Ruby finders. Here's an example:
class Sexp
def name # convenience method
self.sexp_body.first
end
end
# Print out all instance methods within classes. Beware - if "code" sexp itself
# is a class, it will NOT be included!
code = RubyParser.new.parse(IO.read('/src/file'))
code.each_of_type(:class){ |klass|
klass.each_of_type(:defn){ |meth|
puts meth.name
}
}
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