Add mechanism to lookup specific package information

lib/linux_admin.rb

@@ -6,7 +6,9 @@
 require 'linux_admin/common'
 require 'linux_admin/exceptions'
 require 'linux_admin/command_result'
+require 'linux_admin/package'
 require 'linux_admin/rpm'
+require 'linux_admin/deb'
 require 'linux_admin/version'
 require 'linux_admin/yum'
 

lib/linux_admin/deb.rb

@@ -0,0 +1,39 @@
+# LinuxAdmin Deb Representation
+#
+# Copyright (C) 2013 Red Hat Inc.
+# Licensed under the MIT License
+
+class LinuxAdmin
+  class Deb < Package
+    APT_CACHE_CMD = '/usr/bin/apt-cache'
+
+    def self.from_line(apt_cache_line, in_description=false)
+      tag,value = apt_cache_line.split(':')
+      tag = tag.strip.downcase
+      [tag, value]
+    end
+
+    def self.from_string(apt_cache_string)
+      in_description = false
+      apt_cache_string.split("\n").each.with_object({}) do |line,deb|
+        tag,value = self.from_line(line)
+        if tag == 'description-en'
+          in_description = true
+        elsif tag == 'homepage'
+          in_description = false
+        end
+
+        if in_description && tag != 'description-en'
+          deb['description-en'] << line
+        else
+          deb[tag] = value.strip
+        end
+      end
+    end
+
+    def self.info(pkg)
+      self.from_string(run!(APT_CACHE_CMD, :params => ["show", pkg]).output)
+    end
+
+  end
+end

lib/linux_admin/package.rb

@@ -0,0 +1,18 @@
+# LinuxAdmin Abstract Package Representation
+#
+# Copyright (C) 2013 Red Hat Inc.
+# Licensed under the MIT License
+
+class LinuxAdmin
+  class Package < LinuxAdmin
+    def self.info(pkg)
+      if Distro.local == Distros.redhat
+        return Rpm.info(pkg)
+      elsif Distro.local == Distros.ubuntu
+        return Deb.info(pkg)
+      end
+
+      nil
+    end
+  end
+end

lib/linux_admin/rpm.rb

@@ -1,5 +1,7 @@
 class LinuxAdmin
-  class Rpm < LinuxAdmin
+  class Rpm < Package
+    RPM_CMD = '/usr/bin/rpm'
+
     def self.list_installed
       out = run!("rpm -qa --qf \"%{NAME} %{VERSION}-%{RELEASE}\n\"").output
       out.split("\n").each_with_object({}) do |line, pkg_hash|
@@ -8,6 +10,25 @@ def self.list_installed
       end
     end
 
+    def self.info(pkg)
+      params = { "-qi" => pkg}
+      in_description = false
+      out = run!(RPM_CMD, :params => params).output
+      out.split("\n").each.with_object({}) do |line, rpm|
+        tag,value = line.split(':')
+        tag = tag.strip
+        if tag == 'Description'
+          in_description = true
+        elsif in_description
+          rpm['description'] ||= ""
+          rpm['description'] << line + " "
+        else
+          tag = tag.downcase.gsub(/\s/, '_')
+          rpm[tag] = value.strip
+        end
+      end
+    end
+
     def self.upgrade(pkg)
       cmd     = "rpm -U"
       params  = { nil => pkg }

spec/deb_spec.rb

@@ -0,0 +1,54 @@
+require 'spec_helper'
+
+describe LinuxAdmin::Deb do
+  describe "#info" do
+    it "returns package metadata" do
+      # as output w/ apt-cache show ruby on ubuntu 13.04
+      data = <<EOS
+Package: ruby
+Priority: optional
+Section: interpreters
+Installed-Size: 31
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+Original-Maintainer: akira yamada <akira@debian.org>
+Architecture: all
+Source: ruby-defaults
+Version: 4.9
+Replaces: irb, rdoc
+Provides: irb, rdoc
+Depends: ruby1.9.1 (>= 1.9.3.194-1)
+Suggests: ri, ruby-dev
+Conflicts: irb, rdoc
+Filename: pool/main/r/ruby-defaults/ruby_4.9_all.deb
+Size: 4896
+MD5sum: b1991f2e0eafb04f5930ed242cfe1476
+SHA1: a7c55fbb83dd8382631ea771b5555d989351f840
+SHA256: 84d042e0273bd2f0082dd9e7dda0246267791fd09607041a35485bfff92f38d9
+Description-en: Interpreter of object-oriented scripting language Ruby (default version)
+ Ruby is the interpreted scripting language for quick and easy
+ object-oriented programming.  It has many features to process text
+ files and to do system management tasks (as in perl).  It is simple,
+ straight-forward, and extensible.
+ .
+ This package is a dependency package, which depends on Debian's default Ruby
+ version (currently v1.9.3).
+Homepage: http://www.ruby-lang.org/
+Description-md5: da2991b37e3991230d79ba70f9c01682
+Bugs: https://bugs.launchpad.net/ubuntu/+filebug
+Origin: Ubuntu
+Supported: 9m
+Task: kubuntu-desktop, kubuntu-full, kubuntu-active, kubuntu-active-desktop, kubuntu-active-full, kubuntu-active, edubuntu-desktop-gnome, ubuntustudio-font-meta
+EOS
+      described_class.should_receive(:run).
+                      with(described_class::APT_CACHE_CMD, :params => ["show", "ruby"]).
+                      and_return(CommandResult.new(data, "", 0))
+      metadata = described_class.info("ruby")
+      metadata['package'].should == 'ruby'
+      metadata['priority'].should == 'optional'
+      metadata['section'].should == 'interpreters'
+      metadata['architecture'].should == 'all'
+      metadata['version'].should == '4.9'
+      metadata['origin'].should == 'Ubuntu'
+    end
+  end
+end

spec/package_spec.rb

@@ -0,0 +1,17 @@
+require 'spec_helper'
+
+describe LinuxAdmin::Package do
+  describe "#info" do
+    it "dispatches to redhat lookup mechanism" do
+      LinuxAdmin::Distro.should_receive(:local).and_return(LinuxAdmin::Distros.redhat)
+      LinuxAdmin::Rpm.should_receive(:info).with('ruby')
+      described_class.info 'ruby'
+    end
+
+    it "dispatches to ubuntu lookup mechanism" do
+      LinuxAdmin::Distro.should_receive(:local).twice.and_return(LinuxAdmin::Distros.ubuntu)
+      LinuxAdmin::Deb.should_receive(:info).with('ruby')
+      described_class.info 'ruby'
+    end
+  end
+end

spec/rpm_spec.rb

@@ -27,8 +27,54 @@
       })
   end
 
+  describe "#info" do
+    it "returns package metadata" do
+      # as output w/ rpm -qi ruby on F19
+      data = <<EOS
+Name        : ruby
+Version     : 2.0.0.247
+Release     : 15.fc19
+Architecture: x86_64
+Install Date: Sat 19 Oct 2013 08:17:20 PM EDT
+Group       : Development/Languages
+Size        : 64473
+License     : (Ruby or BSD) and Public Domain
+Signature   : RSA/SHA256, Thu 01 Aug 2013 02:07:03 PM EDT, Key ID 07477e65fb4b18e6
+Source RPM  : ruby-2.0.0.247-15.fc19.src.rpm
+Build Date  : Wed 31 Jul 2013 08:26:49 AM EDT
+Build Host  : buildvm-16.phx2.fedoraproject.org
+Relocations : (not relocatable)
+Packager    : Fedora Project
+Vendor      : Fedora Project
+URL         : http://ruby-lang.org/
+Summary     : An interpreter of object-oriented scripting language
+Description :
+Ruby is the interpreted scripting language for quick and easy
+object-oriented programming.  It has many features to process text
+files and to do system management tasks (as in Perl).  It is simple,
+straight-forward, and extensible.
+EOS
+      described_class.should_receive(:run).
+                      with(described_class::RPM_CMD, :params => {"-qi" => "ruby"}).
+                      and_return(CommandResult.new(data, "", 0))
+      metadata = described_class.info("ruby")
+      metadata['name'].should == 'ruby'
+      metadata['version'].should == '2.0.0.247'
+      metadata['release'].should == '15.fc19'
+      metadata['architecture'].should == 'x86_64'
+      metadata['group'].should == 'Development/Languages'
+      metadata['size'].should == '64473'
+      metadata['license'].should == '(Ruby or BSD) and Public Domain'
+      metadata['source_rpm'].should == 'ruby-2.0.0.247-15.fc19.src.rpm'
+      metadata['build_host'].should == 'buildvm-16.phx2.fedoraproject.org'
+      metadata['packager'].should == 'Fedora Project'
+      metadata['vendor'].should == 'Fedora Project'
+      metadata['summary'].should == 'An interpreter of object-oriented scripting language'
+    end
+  end
+
   it ".upgrade" do
     described_class.should_receive(:run).with("rpm -U", {:params=>{nil=>"abc"}}).and_return(CommandResult.new("", "", 0))
     expect(described_class.upgrade("abc")).to be_true
   end
-end
+end