license extractor

extract dependency license information

dev-tools/extract_party_license.rb

@@ -0,0 +1,54 @@
+#!/bin/env ruby
+# Licensed to Elasticsearch under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance  with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on 
+# an 'AS IS' BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+# either express or implied. See the License for the specific
+# language governing permissions and limitations under the License
+#
+# The script extract license information out of logstash project
+# First it will use license information out of gem object.  
+# If that is not available, it will try to print out the license file
+#
+require 'rubygems' 
+require 'bundler/setup'
+require 'yaml'
+
+# get all local installed gems
+def all_installed_gems
+   Gem::Specification.all = nil    
+   all = Gem::Specification 
+   Gem::Specification.reset
+   all
+end
+
+all_installed_gems.select {|y| y.gem_dir.include?('vendor') }.each do |x|
+  puts '='*80 #seperator
+  if(x.license) #ah gem has license information
+    puts "%s,%s,%s"%[x.name, x.version, x.license] 
+  else
+    puts "%s,%s"%[x.name, x.version]
+    license_file =  Dir.glob(File.join(x.gem_dir,'LICENSE*')).first #see if there is a license file
+    if(license_file)
+      file = File.open(license_file, 'r')
+      data = file.read
+      file.close
+      puts data
+    else
+      #no license file.. try to print some gem information
+      puts 'No License File'
+      puts x.gem_dir
+      puts x.files.join("\n")
+    end
+  end
+end
+