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154 lines
4.9 KiB
Python
154 lines
4.9 KiB
Python
# (c) 2013, Jan-Piet Mens <jpmens(at)gmail.com>
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# (c) 2017 Ansible Project
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# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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DOCUMENTATION = """
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lookup: csvfile
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author: Jan-Piet Mens (@jpmens) <jpmens(at)gmail.com>
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version_added: "1.5"
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short_description: read data from a TSV or CSV file
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description:
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- The csvfile lookup reads the contents of a file in CSV (comma-separated value) format.
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The lookup looks for the row where the first column matches keyname, and returns the value in the second column, unless a different column is specified.
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options:
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col:
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description: column to return (0 index).
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default: "1"
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default:
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description: what to return if the value is not found in the file.
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default: ''
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delimiter:
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description: field separator in the file, for a tab you can specify "TAB" or "t".
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default: TAB
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file:
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description: name of the CSV/TSV file to open.
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default: ansible.csv
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encoding:
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description: Encoding (character set) of the used CSV file.
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default: utf-8
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version_added: "2.1"
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notes:
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- The default is for TSV files (tab delimited) not CSV (comma delimited) ... yes the name is misleading.
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"""
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EXAMPLES = """
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- name: Match 'Li' on the first column, return the second column (0 based index)
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debug: msg="The atomic number of Lithium is {{ lookup('csvfile', 'Li file=elements.csv delimiter=,') }}"
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- name: msg="Match 'Li' on the first column, but return the 3rd column (columns start counting after the match)"
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debug: msg="The atomic mass of Lithium is {{ lookup('csvfile', 'Li file=elements.csv delimiter=, col=2') }}"
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"""
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RETURN = """
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_raw:
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description:
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- value(s) stored in file column
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"""
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import codecs
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import csv
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from collections import MutableSequence
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from ansible.errors import AnsibleError, AnsibleAssertionError
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from ansible.plugins.lookup import LookupBase
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from ansible.module_utils.six import PY2
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from ansible.module_utils._text import to_bytes, to_native, to_text
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class CSVRecoder:
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"""
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Iterator that reads an encoded stream and reencodes the input to UTF-8
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"""
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def __init__(self, f, encoding='utf-8'):
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self.reader = codecs.getreader(encoding)(f)
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def __iter__(self):
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return self
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def __next__(self):
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return next(self.reader).encode("utf-8")
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next = __next__ # For Python 2
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class CSVReader:
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"""
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A CSV reader which will iterate over lines in the CSV file "f",
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which is encoded in the given encoding.
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"""
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def __init__(self, f, dialect=csv.excel, encoding='utf-8', **kwds):
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if PY2:
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f = CSVRecoder(f, encoding)
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else:
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f = codecs.getreader(encoding)(f)
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self.reader = csv.reader(f, dialect=dialect, **kwds)
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def __next__(self):
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row = next(self.reader)
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return [to_text(s) for s in row]
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next = __next__ # For Python 2
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def __iter__(self):
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return self
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class LookupModule(LookupBase):
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def read_csv(self, filename, key, delimiter, encoding='utf-8', dflt=None, col=1):
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try:
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f = open(filename, 'rb')
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creader = CSVReader(f, delimiter=to_native(delimiter), encoding=encoding)
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for row in creader:
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if len(row) and row[0] == key:
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return row[int(col)]
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except Exception as e:
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raise AnsibleError("csvfile: %s" % to_native(e))
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return dflt
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def run(self, terms, variables=None, **kwargs):
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ret = []
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for term in terms:
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params = term.split()
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key = params[0]
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paramvals = {
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'col': "1", # column to return
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'default': None,
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'delimiter': "TAB",
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'file': 'ansible.csv',
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'encoding': 'utf-8',
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}
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# parameters specified?
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try:
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for param in params[1:]:
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name, value = param.split('=')
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if name not in paramvals:
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raise AnsibleAssertionError('%s not in paramvals' % name)
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paramvals[name] = value
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except (ValueError, AssertionError) as e:
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raise AnsibleError(e)
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if paramvals['delimiter'] == 'TAB':
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paramvals['delimiter'] = "\t"
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lookupfile = self.find_file_in_search_path(variables, 'files', paramvals['file'])
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var = self.read_csv(lookupfile, key, paramvals['delimiter'], paramvals['encoding'], paramvals['default'], paramvals['col'])
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if var is not None:
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if isinstance(var, MutableSequence):
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for v in var:
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ret.append(v)
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else:
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ret.append(var)
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return ret
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