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#!/usr/bin/env ruby
require 'rexml/document'
require 'rexml/streamlistener'
class MavenListener
include REXML::StreamListener
attr_accessor :group_id, :artifact_id, :text
attr_accessor :callback
def initialize(callback)
@callback = callback
@is_pom_file = false
end
def tag_start(name, attrs)
case name
when 'project'
@is_pom_file = true
if attrs['xmlns'] and attrs['xmlns'] !~ /^http:\/\/maven\.apache\.org\/POM\//
# False alarm -- it contains a project element, but of another namespace
@is_pom_file = false
end
when 'plugin', 'dependency'
@group_id = nil
@artifact_id = nil
end
end
def tag_end(name)
case name
when 'groupId'
@group_id = clean(@text)
when 'artifactId'
@artifact_id = clean(@text)
when /^(plugin|dependency)$/
if @is_pom_file && @group_id && @artifact_id
@callback.call($1, @group_id, @artifact_id)
end
end
end
# Remove whitespace from text values.
# Also, clear out variable substitutions, which we are incapable of performing correctly
def clean(s)
s.strip.gsub(/\$\{.*\}/, '')
end
def text(text)
@text = text
end
end
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