Support for detecting Alpine Linux

library/setup

@@ -99,7 +99,8 @@ class Facts(object):
     OSDIST_DICT = { '/etc/redhat-release': 'RedHat',
                     '/etc/vmware-release': 'VMwareESX',
                     '/etc/openwrt_release': 'OpenWrt',
-                    '/etc/system-release': 'OtherLinux' }
+                    '/etc/system-release': 'OtherLinux',
+                    '/etc/alpine-release': 'Alpine' }
     SELINUX_MODE_DICT = { 1: 'enforcing', 0: 'permissive', -1: 'disabled' }
 
     # A list of dicts.  If there is a platform with more than one
@@ -110,7 +111,8 @@ class Facts(object):
                  { 'path' : '/usr/bin/zypper',      'name' : 'zypper' },
                  { 'path' : '/usr/bin/pacman',      'name' : 'pacman' },
                  { 'path' : '/bin/opkg',            'name' : 'opkg' },
-                 { 'path' : '/opt/local/bin/pkgin', 'name' : 'pkgin' } ]
+                 { 'path' : '/opt/local/bin/pkgin', 'name' : 'pkgin' },
+                 { 'path' : '/sbin/apk',            'name' : 'apk' } ]
 
     def __init__(self):
         self.facts = {}
@@ -164,7 +166,7 @@ class Facts(object):
             SLED = 'Suse', OpenSuSE = 'Suse', SuSE = 'Suse', Gentoo = 'Gentoo',
             Archlinux = 'Archlinux', Mandriva = 'Mandrake', Mandrake = 'Mandrake',
             Solaris = 'Solaris', Nexenta = 'Solaris', OmniOS = 'Solaris', OpenIndiana = 'Solaris',
-            SmartOS = 'Solaris', AIX = 'AIX'
+            SmartOS = 'Solaris', AIX = 'AIX', Alpine = 'Alpine'
         )
 
         if self.facts['system'] == 'AIX':
@@ -204,6 +206,10 @@ class Facts(object):
                         release = re.search('DISTRIB_CODENAME="(.*)"', data)
                         if release:
                             self.facts['distribution_release'] = release.groups()[0]
+                    elif name == 'Alpine':
+                        data = get_file_content(path)
+                        self.facts['distribution'] = 'Alpine'
+                        self.facts['distribution_version'] = data
                     else:
                         self.facts['distribution'] = name