From 9b6e7da47e8a648ea39281a2f7b037c69f1befbc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Per=20=C3=98yvind=20Karlsen?= <peroyvind@mandriva.org>
Date: Sun, 21 Mar 2010 03:41:53 +0000
Subject: add rubygem(...) dependency extractor (disabled for now)

---
 Makefile.am      |  3 +-
 find-provides.in |  6 ++++
 find-requires.in |  6 ++++
 rubygems.rb      | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 98 insertions(+), 1 deletion(-)
 create mode 100755 rubygems.rb

diff --git a/Makefile.am b/Makefile.am
index 4ea55e1..f89860d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -39,7 +39,8 @@ pkg_scripts = \
 		   perl.req-from-meta \
 		   php.prov \
 		   php.req \
-		   pkgconfigdeps.sh
+		   pkgconfigdeps.sh \
+		   rubygems.rb
 
 pkg_gscripts = \
 		   find-provides \
diff --git a/find-provides.in b/find-provides.in
index 23c9296..90d7d7e 100755
--- a/find-provides.in
+++ b/find-provides.in
@@ -9,6 +9,7 @@ solist=$(echo "$filelist" | egrep -v "^/lib/ld\.so|/usr/lib(64)?/gcj/" | egrep '
 	xargs file -L 2>/dev/null | grep "ELF.*shared object" | cut -d: -f1)
 pythonlist=
 tcllist=
+rubygemlist=$(echo "$filelist"| egrep "\.gemspec$")                                                                                                         
 
 #
 # --- Alpha does not mark 64bit dependencies
@@ -81,6 +82,11 @@ if [ -n "$LIBTOOLDEP" ]; then
 
 fi
 
+#
+# --- Ruby gems
+#[ -x @RPMVENDORDIR@/rubygems.rb -a -n "$rubygemlist" ] &&
+#    echo $rubygemlist | tr '[:blank:]' \\n | @RPMVENDORDIR@/rubygems.rb --provides | sort -u
+
 #
 # --- .so files.
 for i in `echo $filelist | tr '[:blank:]' "\n" | egrep '(/usr(/X11R6)?)?/lib(|64)(/gcc(-lib)?/.+)?/[^/]+\.so$'`; do
diff --git a/find-requires.in b/find-requires.in
index 9d5e841..dbadb0b 100755
--- a/find-requires.in
+++ b/find-requires.in
@@ -52,6 +52,7 @@ interplist=
 perllist=
 pythonlist=
 tcllist=
+rubygemlist=`echo "$filelist"| egrep "\.gemspec$"`
 
 uniqdeplist=
 
@@ -233,6 +234,11 @@ if [ -n "$LIBTOOLDEP" ]; then
 
 fi
 
+#
+# --- Ruby gems
+#[ -x @RPMVENDORDIR@/rubygems.rb -a -n "$rubygemlist" ] &&
+#    echo $rubygemlist | tr '[:blank:]' \\n | @RPMVENDORDIR@/rubygems.rb --requires | sort -u
+
 #
 # --- .so files.
 for i in `echo $filelist | tr '[:blank:]' "\n" | egrep "(/usr(/X11R6)?)?/lib(|64)/[^/]+\.so$"`; do
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
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