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Merge pull request #3559 from sergevanginderachter/flat_list
Introduce flat_list lookup plugin
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commit
9dec701728
1 changed files with 78 additions and 0 deletions
78
lib/ansible/runner/lookup_plugins/flat_list.py
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78
lib/ansible/runner/lookup_plugins/flat_list.py
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# (c) 2013, Serge van Ginderachter <serge@vanginderachter.be>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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import ansible.utils as utils
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import ansible.errors as errors
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def check_list_of_one_list(term):
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# make sure term is not a list of one (list of one..) item
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# return the final non list item if so
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if isinstance(term,list) and len(term) == 1:
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term = term[0]
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if isinstance(term,list):
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term = check_list_of_one_list(term)
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return term
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class LookupModule(object):
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def __init__(self, basedir=None, **kwargs):
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self.basedir = basedir
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def flatten(self, terms, inject):
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ret = []
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for term in terms:
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term = check_list_of_one_list(term)
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if term == 'None' or term == 'null':
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# ignore undefined items
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break
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if isinstance(term, basestring):
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# convert a variable to a list
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term2 = utils.listify_lookup_plugin_terms(term, self.basedir, inject)
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# but avoid converting a plain string to a list of one string
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if term2 != [ term ]:
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term = term2
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if isinstance(term, list):
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# if it's a list, check recursively for items that are a list
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term = self.flatten(term, inject)
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ret.extend(term)
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else:
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ret.append(term)
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return ret
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def run(self, terms, inject=None, **kwargs):
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# see if the string represents a list and convert to list if so
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terms = utils.listify_lookup_plugin_terms(terms, self.basedir, inject)
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if not isinstance(terms, list):
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raise errors.AnsibleError("with_flat_list expects a list")
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ret = self.flatten(terms, inject)
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return ret
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