Add new recipe : generate output if input is not null

parent b4ff66cb
......@@ -58,6 +58,7 @@ setup(name=name,
'erp5scalabilitytestbed = slapos.recipe.erp5scalabilitytestbed:Recipe',
'equeue = slapos.recipe.equeue:Recipe',
'erp5testnode = slapos.recipe.erp5testnode:Recipe',
'generate_output_if_input_not_null = slapos.recipe.generate_output_if_input_not_null:Recipe',
'generate.mac = slapos.recipe.generatemac:Recipe',
'nbdserver = slapos.recipe.nbdserver:Recipe',
'generic.onetimeupload = slapos.recipe.generic_onetimeupload:Recipe',
......
##############################################################################
#
# 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.
#
##############################################################################
from slapos.recipe.librecipe import GenericBaseRecipe
class Recipe(GenericBaseRecipe):
"""Generate an output from one or several input and a template.
Take "input-list" buildout parameter as input.
Each input of the list is separated by \n
Each input contains :
1/ The parameter to use (like mybuildoutpart:myparameter)
2/ The name of the input to use as key.
If all parameters in input are found, create an "output" parameter from a
"template" parameter. The "template" parameter is just a string containing
python parameters (like %(mykey)s).
Will produce nothing if one element of "input_list" doesn't exist.
Will raise if any input reference non-existent buildout part.
Example :
[get-output]
recipe = slapos.cookbook:generate_output_if_input_not_null
input-list =
firstkey mybuildoutpart:myparameter
otherkey myotherbuildoutpart:myotherparameter
template = I want to get %(key)s and %(otherkey)s
This example will produce an "output" parameter if myparameter and
myotherparameter are defined.
"""
def __init__(self, buildout, name, options):
# Get all inputs
input_dict = {}
for line in options['input-list'].strip().split('\n'):
key, buildout_parameter = line.split(' ')
buildout_part, parameter_name = buildout_parameter.split(':')
parameter_value = buildout[buildout_part].get(parameter_name)
# If any parameter is not defined, don't do anything
if not parameter_value:
return
input_dict[key] = parameter_value
# Generate output
options['output'] = options['template'] % input_dict
def install(self):
return []
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