add rubygem(...) dependency extractor (disabled for now)

1 files changed, 84 insertions, 0 deletions

diff --git a/rubygems.rb b/rubygems.rb
new file mode 100755
index 0000000..51044b3
--- /dev/null
+++ b/rubygems.rb
@@ -0,0 +1,84 @@
+#!/usr/bin/env ruby
+#--
+# Copyright 2010 Per Øyvind Karlsen <peroyvind@mandriva.org>
+# This program is free software. It may be redistributed and/or modified under
+# the terms of the LGPL version 2.1 (or later).
+#++
+
+require 'optparse'
+require 'rubygems'
+
+provides = false
+requires = false
+
+opts = OptionParser.new("#{$0} <--provides|--requires>")
+opts.on("-P", "--provides", "Print provides") do |val|
+    provides = true
+end
+opts.on("-R", "--requires", "Print requires") do |val|
+    requires= true
+end
+
+rest = opts.permute(ARGV)
+
+if rest.size != 0 or (!provides and !requires) or (provides and requires)
+    $stderr.puts "Use either --provides OR --requires"
+    $stderr.puts opts
+    exit(1)
+end
+
+specpath = "%s/specifications/.*\.gemspec$" % Gem::dir
+gems = []
+for gemspec in $stdin.readlines
+  if gemspec.match(specpath)
+    gems.push(gemspec.chomp)
+  end
+end
+if gems.length > 0
+  if requires
+    require 'rbconfig'
+
+    module Gem
+      class Requirement
+        def rpm_dependency_transform(name, version)
+          pessimistic = ""
+          if version == "> 0.0.0" or version == ">= 0"
+            version = ""
+          else
+            if version[0..1] == "~>"
+              pessimistic = "rubygem(%s) < %s\n" % [name, Gem::Version.create(version[3..-1]).bump]
+              version = version.gsub(/\~>/, '=>')
+            end
+            version = version.gsub(/^/, ' ')
+          end
+          version = "rubygem(%s)%s\n%s" % [name, version, pessimistic]
+        end
+
+        def to_rpm(name)
+          result = as_list
+          return result.map { |version| rpm_dependency_transform(name, version) }
+        end
+
+      end
+    end
+    # TODO: Should we add a strict dependency on ruby version here?
+    #print "ruby < %s%s\n" % [Config::CONFIG["ruby_version"][0..-2], Config::CONFIG["ruby_version"][-1..-1].to_i + 1]
+    print "ruby >= %s\n" % Config::CONFIG["ruby_version"]
+  end
+
+  for gem in gems
+    data = File.read(gem)
+    spec = eval(data)
+    if provides
+      print "rubygem(%s) = %s\n" % [spec.name, spec.version]
+    end
+    if requires
+      for d in spec.dependencies
+        print d.version_requirements.to_rpm(d.name)
+      end
+      for d in spec.required_rubygems_version.to_rpm("rubygems")
+        print d.gsub(/(rubygem\()|(\))/, "")
+      end
+    end
+  end
+end