Move slapos.recipe.download functionality.

slapos.cookbook provided it before, but it is simple functionality, which does
not need so many dependencies.

README.txt

@@ -109,3 +109,36 @@ can be used as::
 
 Which will link ${file:location}/bin/file to ${buildout:bin-directory}/bin/file
 and ${file:location}/bin/file to ${buildout:bin-directory}/bin/anotherfile
+
+Pure download
+-------------
+
+::
+
+  [buildout]
+  parts =
+    download
+
+  [download]
+  recipe = slapos.recipe.build:download
+  url = https://some.url/file
+
+Such profile will download https://some.url/file and put it in
+buildout:parts-directory/download/download
+
+filename parameter can be used to change destination named filename.
+
+destination parameter allows to put explicit destination.
+
+md5sum parameter allows pass md5sum.
+
+mode (octal, so for rw-r--r-- use 0644) allows to set mode
+
+Exposes target attribute which is path to downloaded file.
+
+Notes
+-----
+
+This recipe suffers from buildout download utility issue, which will do not
+try to redownload resource with wrong md5sum.
+

setup.py

@@ -29,6 +29,7 @@ setup(name=name,
       entry_points={
         'zc.buildout': [
           'default = slapos.recipe.build:Script',
-          'cmmi = slapos.recipe.build:Cmmi'
+          'cmmi = slapos.recipe.build:Cmmi',
+          'download = slapos.recipe.download:Recipe'
       ]},
     )

slapos/recipe/download.py

+##############################################################################
+#
+# Copyright (c) 2010 Vifib SARL and Contributors. All Rights Reserved.
+#
+# WARNING: This program as such is intended to be used by professional
+# programmers who take the whole responsibility of assessing all potential
+# consequences resulting from its eventual inadequacies and bugs
+# End users who are looking for a ready-to-use solution with commercial
+# guarantees and support are strongly adviced to contract a Free Software
+# Service Company
+#
+# This program is Free Software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 3
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+##############################################################################
+import os
+import logging
+import shutil
+import zc.buildout
+class Recipe:
+  def __init__(self, buildout, name, options):
+    self.buildout = buildout
+    self.name = name
+    self.options = options
+    self.logger = logging.getLogger(self.name)
+    if 'filename' in self.options and 'destination' in self.options:
+      raise zc.buildout.UserError('Parameters filename and destination are '
+          'exclusive.')
+    self.parts = None
+    self.destination = self.options.get('destination', None)
+    if self.destination is None:
+      self.parts = os.path.join(self.buildout['buildout']['parts-directory'],
+          self.name)
+      self.destination = os.path.join(self.parts, self.options.get('filename',
+        self.name))
+    options['target'] = self.destination
+
+  def install(self):
+    if self.parts is not None:
+      if not os.path.isdir(self.parts):
+        os.mkdir(self.parts)
+    download = zc.buildout.download.Download(self.buildout['buildout'],
+        hash_name=True, cache=self.buildout['buildout'].get('download-cache'))
+    path, is_temp = download(self.options['url'],
+        md5sum=self.options.get('md5sum'))
+    if os.path.exists(self.destination):
+      os.unlink(self.destination)
+    shutil.copy(path, self.destination)
+    mode = self.options.get('mode')
+    if mode is not None:
+      mode = int(mode, 8)
+      os.chmod(self.destination, mode)
+      self.logger.debug('Mode of %r set to 0%o.' % (self.destination, mode))
+    self.logger.debug('Downloaded %r and saved to %r.' % (self.options['url'],
+      self.destination))
+    if self.parts is not None:
+      return [self.parts]
+    else:
+      return []
+
+  update = install