slapos/recipe/symbolic_link.py

   1 ##############################################################################
   2 #
   3 # Copyright (c) 2011 Vifib SARL and Contributors. All Rights Reserved.
   4 #
   5 # WARNING: This program as such is intended to be used by professional
   6 # programmers who take the whole responsibility of assessing all potential
   7 # consequences resulting from its eventual inadequacies and bugs
   8 # End users who are looking for a ready-to-use solution with commercial
   9 # guarantees and support are strongly adviced to contract a Free Software
  10 # Service Company
  11 #
  12 # This program is Free Software; you can redistribute it and/or
  13 # modify it under the terms of the GNU General Public License
  14 # as published by the Free Software Foundation; either version 3
  15 # of the License, or (at your option) any later version.
  16 #
  17 # This program is distributed in the hope that it will be useful,
  18 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 # GNU General Public License for more details.
  21 #
  22 # You should have received a copy of the GNU General Public License
  23 # along with this program; if not, write to the Free Software
  24 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  25 #
  26 ##############################################################################
  27 import os
  28 import logging
  29
  30 import zc.buildout
  31
  32
  33 class Recipe:
  34   def __init__(self, buildout, name, options):
  35     self.buildout = buildout
  36     self.name = name
  37     self.options = options
  38     self.logger = logging.getLogger(self.name)
  39
  40   def install(self):
  41     """
  42     Links binaries to instance's bin directory for easier exposal
  43     """
  44     path_list = []
  45     target_directory = self.options['target-directory']
  46     # XXX: breaks if any path contains spaces.
  47     for linkline in self.options['link-binary'].split():
  48       path, linkname = os.path.split(linkline)
  49
  50       link = os.path.join(target_directory, linkname)
  51       if os.path.lexists(link):
  52         if not os.path.islink(link):
  53           raise zc.buildout.UserError(
  54               'Target link already %r exists but it is not link' % link)
  55         os.unlink(link)
  56       os.symlink(linkline, link)
  57       self.logger.debug('Created link %r -> %r' % (link, linkline))
  58       path_list.append(link)
  59
  60     return path_list
  61
  62   update = install