Add projects.xml generation script

bin/projects-xml.rb

@@ -0,0 +1,70 @@
+#!/usr/bin/env ruby
+# Generates projects.xml as per GLEP-67 from projects.json via semantic-data-toolkit.
+# The file is only touched if contents change.
+#
+# Usage: projects-xml.rb <file>
+#
+# Alex Legler <[email protected]>
+
+require 'net/http'
+require 'json'
+require 'nokogiri'
+
+PROJECTS_JSON = URI('https://wiki.gentoo.org/rdf/projects.json')
+
+projects = begin
+  JSON.parse(Net::HTTP.get(PROJECTS_JSON))
+rescue JSON::ParserError
+  abort 'Cannot load projects.json.'
+end
+
+parent_map = Hash.new { |h, k| h[k] = [] }
+
+projects.each_pair do |id, project|
+  parent_map[project['parent']] << id if project.key? 'parent'
+end
+
+projects_xml = Nokogiri::XML::Builder.new(encoding: 'UTF-8') do |xml|
+  xml.doc.create_internal_subset('projects', nil, 'http://www.gentoo.org/dtd/projects.dtd')
+  xml.projects do
+    projects.each_pair do |id, project|
+      xml.project do
+        xml.email project['email']
+        xml.name project['name']
+        xml.url project['href']
+        xml.description project['description']
+
+        if parent_map.key? id
+          parent_map[id].each do |subproject_id|
+            attributes = { ref: projects[subproject_id]['email'] }
+            attributes['inherit-members'] = '1' if projects[subproject_id]['propagates_members']
+
+            xml.subproject nil, attributes
+          end
+        end
+
+        project['members'].sort { |a, b| a['nickname'].casecmp(b['nickname']) }.each do |member|
+          attributes = {}
+          attributes['is-lead'] = '1' if member['is_lead']
+
+          xml.member nil, attributes do
+            xml.email member['email']
+            xml.name member['name']
+            xml.role member['role'] if member.key?('role') && !member['role'].empty?
+          end
+        end
+      end
+    end
+  end
+end
+
+output_file = ARGV[0]
+
+generated_xml = projects_xml.to_xml
+current_xml = begin
+  File.read(output_file)
+rescue Errno::ENOENT
+  ''
+end
+
+File.write(output_file, projects_xml.to_xml) unless generated_xml == current_xml