Added deploy_chef support for Arch Linux.

Not installing rubygems from source since the arch ruby
package includes rubygems 1.3.7.

README.md

@@ -134,7 +134,7 @@ LittleChef will try to autodetect the distro type and version of that node, and
 You can also install Chef Solo with gems and/or without asking for confirmation:  
 `fix node:MYNODE deploy_chef:gems=yes,ask=no`
 
-Currently supported Linux distributions include Ubuntu, Debian, CentOS, RHEL, Scientific Linux and Gentoo.
+Currently supported Linux distributions include Ubuntu, Debian, CentOS, RHEL, Scientific Linux, Gentoo, and Arch Linux.
 
 When using the Debian repository, you need to take into account that Opscode has separated Chef versions in different repos. Current default is Chef 0.10, but you can install Chef 0.9 by typing:
 `fix node:MYNODE deploy_chef:version=0.9`

littlechef/solo.py

@@ -42,6 +42,8 @@ def install(distro_type, distro, gems, version, stop_client):
                 _rpm_install()
         elif distro_type == "gentoo":
             _emerge_install()
+        elif distro_type == "pacman":
+            _gem_pacman_install()
         else:
             abort('wrong distro type: {0}'.format(distro_type))
 
@@ -122,12 +124,16 @@ def check_distro():
         elif 'This is \\n.\\O (\\s \\m \\r) \\t' in output:
             distro = "Gentoo"
             distro_type = "gentoo"
+        elif 'Arch Linux \\r  (\\n) (\\l)' in output:
+            distro = "Arch Linux"
+            distro_type = "pacman"
         else:
             print "Currently supported distros are:"
             print "  Debian: " + ", ".join(debian_distros)
             print "  Ubuntu: " + ", ".join(ubuntu_distros)
             print "  RHEL: " + ", ".join(rpm_distros)
             print "  Gentoo"
+            print "  Arch Linux"
             abort("Unsupported distro '{0}'".format(output))
     return distro_type, distro
 
@@ -164,6 +170,15 @@ def _gem_rpm_install():
     _gem_install()
 
 
+def _gem_pacman_install():
+    """Install Chef from gems for apt based distros"""
+    with hide('stdout', 'running'):
+        sudo('pacman -Syu --noconfirm')
+    with show('running'):
+        sudo('pacman -S --noconfirm ruby base-devel wget rsync')
+    sudo('gem install --no-rdoc --no-ri chef')
+
+
 def _apt_install(distro, version, stop_client='yes'):
     """Install Chef for debian based distros"""
     with settings(hide('stdout', 'running')):