git.oblomov.eu Git - ohcount/blob - ruby/gestalt/rules/maven_parser.rb

   1 #!/usr/bin/env ruby
   2 require 'rexml/document'
   3 require 'rexml/streamlistener'
   4
   5 class MavenListener
   6         include REXML::StreamListener
   7
   8         attr_accessor :group_id, :artifact_id, :text
   9
  10         attr_accessor :callback
  11         def initialize(callback)
  12                 @callback = callback
  13                 @is_pom_file = false
  14         end
  15
  16         def tag_start(name, attrs)
  17                 case name
  18                 when 'project'
  19                         @is_pom_file = true
  20                         if attrs['xmlns'] and attrs['xmlns'] !~ /^http:\/\/maven\.apache\.org\/POM\//
  21                                 # False alarm -- it contains a project element, but of another namespace
  22                                 @is_pom_file = false
  23                         end
  24                 when 'plugin', 'dependency'
  25                         @group_id = nil
  26                         @artifact_id = nil
  27                 end
  28         end
  29
  30         def tag_end(name)
  31                 case name
  32                 when 'groupId'
  33                         @group_id = clean(@text)
  34                 when 'artifactId'
  35                         @artifact_id = clean(@text)
  36                 when /^(plugin|dependency)$/
  37                         if @is_pom_file && @group_id && @artifact_id
  38                                 @callback.call($1, @group_id, @artifact_id)
  39                         end
  40                 end
  41         end
  42
  43         # Remove whitespace from text values.
  44         # Also, clear out variable substitutions, which we are incapable of performing correctly
  45         def clean(s)
  46                 s.strip.gsub(/\$\{.*\}/, '')
  47         end
  48
  49         def text(text)
  50                 @text = text
  51         end
  52 end