mirror of
https://github.com/thegeeklab/ansible-later.git
synced 2024-11-16 10:00:39 +00:00
257 lines
8.6 KiB
Python
257 lines
8.6 KiB
Python
# (c) 2013, Jayson Vantuyl <jayson@aggressive.ly>
|
|
# (c) 2012-17 Ansible Project
|
|
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
|
|
from __future__ import (absolute_import, division, print_function)
|
|
__metaclass__ = type
|
|
|
|
DOCUMENTATION = """
|
|
lookup: sequence
|
|
author: Jayson Vantuyl <jayson@aggressive.ly>
|
|
version_added: "1.0"
|
|
short_description: generate a list based on a number sequence
|
|
description:
|
|
- generates a sequence of items. You can specify a start value, an end value, an optional "stride" value that specifies the number of steps
|
|
to increment the sequence, and an optional printf-style format string.
|
|
- 'Arguments can be specified as key=value pair strings or as a shortcut form of the arguments string is also accepted: [start-]end[/stride][:format].'
|
|
- 'Numerical values can be specified in decimal, hexadecimal (0x3f8) or octal (0600).'
|
|
- Starting at version 1.9.2, negative strides are allowed.
|
|
options:
|
|
start:
|
|
description: number at which to start the sequence
|
|
default: 0
|
|
type: number
|
|
end:
|
|
description: number at which to end the sequence, dont use this with count
|
|
type: number
|
|
default: 0
|
|
count:
|
|
description: number of elements in the sequence, this is not to be used with end
|
|
type: number
|
|
default: 0
|
|
stride:
|
|
description: increments between sequence numbers, the default is 1 unless the end is less than the start, then it is -1.
|
|
type: number
|
|
format:
|
|
description: return a string with the generated number formatted in
|
|
"""
|
|
|
|
EXAMPLES = """
|
|
- name: create some test users
|
|
user:
|
|
name: "{{ item }}"
|
|
state: present
|
|
groups: "evens"
|
|
with_sequence: start=0 end=32 format=testuser%02x
|
|
|
|
- name: create a series of directories with even numbers for some reason
|
|
file:
|
|
dest: "/var/stuff/{{ item }}"
|
|
state: directory
|
|
with_sequence: start=4 end=16 stride=2
|
|
|
|
- name: a simpler way to use the sequence plugin create 4 groups
|
|
group:
|
|
name: "group{{ item }}"
|
|
state: present
|
|
with_sequence: count=4
|
|
|
|
- name: the final countdown
|
|
debug: msg={{item}} seconds to detonation
|
|
with_sequence: end=0 start=10
|
|
"""
|
|
|
|
RETURN = """
|
|
_list:
|
|
description: generated sequence of numbers or strings
|
|
"""
|
|
|
|
from re import compile as re_compile, IGNORECASE
|
|
|
|
from ansible.errors import AnsibleError
|
|
from ansible.module_utils.six.moves import xrange
|
|
from ansible.parsing.splitter import parse_kv
|
|
from ansible.plugins.lookup import LookupBase
|
|
|
|
|
|
# shortcut format
|
|
NUM = "(0?x?[0-9a-f]+)"
|
|
SHORTCUT = re_compile(
|
|
"^(" + # Group 0
|
|
NUM + # Group 1: Start
|
|
"-)?" +
|
|
NUM + # Group 2: End
|
|
"(/" + # Group 3
|
|
NUM + # Group 4: Stride
|
|
")?" +
|
|
"(:(.+))?$", # Group 5, Group 6: Format String
|
|
IGNORECASE
|
|
)
|
|
|
|
|
|
class LookupModule(LookupBase):
|
|
"""
|
|
sequence lookup module
|
|
|
|
Used to generate some sequence of items. Takes arguments in two forms.
|
|
|
|
The simple / shortcut form is:
|
|
|
|
[start-]end[/stride][:format]
|
|
|
|
As indicated by the brackets: start, stride, and format string are all
|
|
optional. The format string is in the style of printf. This can be used
|
|
to pad with zeros, format in hexadecimal, etc. All of the numerical values
|
|
can be specified in octal (i.e. 0664) or hexadecimal (i.e. 0x3f8).
|
|
Negative numbers are not supported.
|
|
|
|
Some examples:
|
|
|
|
5 -> ["1","2","3","4","5"]
|
|
5-8 -> ["5", "6", "7", "8"]
|
|
2-10/2 -> ["2", "4", "6", "8", "10"]
|
|
4:host%02d -> ["host01","host02","host03","host04"]
|
|
|
|
The standard Ansible key-value form is accepted as well. For example:
|
|
|
|
start=5 end=11 stride=2 format=0x%02x -> ["0x05","0x07","0x09","0x0a"]
|
|
|
|
This format takes an alternate form of "end" called "count", which counts
|
|
some number from the starting value. For example:
|
|
|
|
count=5 -> ["1", "2", "3", "4", "5"]
|
|
start=0x0f00 count=4 format=%04x -> ["0f00", "0f01", "0f02", "0f03"]
|
|
start=0 count=5 stride=2 -> ["0", "2", "4", "6", "8"]
|
|
start=1 count=5 stride=2 -> ["1", "3", "5", "7", "9"]
|
|
|
|
The count option is mostly useful for avoiding off-by-one errors and errors
|
|
calculating the number of entries in a sequence when a stride is specified.
|
|
"""
|
|
|
|
def reset(self):
|
|
"""set sensible defaults"""
|
|
self.start = 1
|
|
self.count = None
|
|
self.end = None
|
|
self.stride = 1
|
|
self.format = "%d"
|
|
|
|
def parse_kv_args(self, args):
|
|
"""parse key-value style arguments"""
|
|
for arg in ["start", "end", "count", "stride"]:
|
|
try:
|
|
arg_raw = args.pop(arg, None)
|
|
if arg_raw is None:
|
|
continue
|
|
arg_cooked = int(arg_raw, 0)
|
|
setattr(self, arg, arg_cooked)
|
|
except ValueError:
|
|
raise AnsibleError(
|
|
"can't parse arg %s=%r as integer"
|
|
% (arg, arg_raw)
|
|
)
|
|
if 'format' in args:
|
|
self.format = args.pop("format")
|
|
if args:
|
|
raise AnsibleError(
|
|
"unrecognized arguments to with_sequence: %r"
|
|
% args.keys()
|
|
)
|
|
|
|
def parse_simple_args(self, term):
|
|
"""parse the shortcut forms, return True/False"""
|
|
match = SHORTCUT.match(term)
|
|
if not match:
|
|
return False
|
|
|
|
_, start, end, _, stride, _, format = match.groups()
|
|
|
|
if start is not None:
|
|
try:
|
|
start = int(start, 0)
|
|
except ValueError:
|
|
raise AnsibleError("can't parse start=%s as integer" % start)
|
|
if end is not None:
|
|
try:
|
|
end = int(end, 0)
|
|
except ValueError:
|
|
raise AnsibleError("can't parse end=%s as integer" % end)
|
|
if stride is not None:
|
|
try:
|
|
stride = int(stride, 0)
|
|
except ValueError:
|
|
raise AnsibleError("can't parse stride=%s as integer" % stride)
|
|
|
|
if start is not None:
|
|
self.start = start
|
|
if end is not None:
|
|
self.end = end
|
|
if stride is not None:
|
|
self.stride = stride
|
|
if format is not None:
|
|
self.format = format
|
|
|
|
return True
|
|
|
|
def sanity_check(self):
|
|
if self.count is None and self.end is None:
|
|
raise AnsibleError("must specify count or end in with_sequence")
|
|
elif self.count is not None and self.end is not None:
|
|
raise AnsibleError("can't specify both count and end in with_sequence")
|
|
elif self.count is not None:
|
|
# convert count to end
|
|
if self.count != 0:
|
|
self.end = self.start + self.count * self.stride - 1
|
|
else:
|
|
self.start = 0
|
|
self.end = 0
|
|
self.stride = 0
|
|
del self.count
|
|
if self.stride > 0 and self.end < self.start:
|
|
raise AnsibleError("to count backwards make stride negative")
|
|
if self.stride < 0 and self.end > self.start:
|
|
raise AnsibleError("to count forward don't make stride negative")
|
|
if self.format.count('%') != 1:
|
|
raise AnsibleError("bad formatting string: %s" % self.format)
|
|
|
|
def generate_sequence(self):
|
|
if self.stride >= 0:
|
|
adjust = 1
|
|
else:
|
|
adjust = -1
|
|
numbers = xrange(self.start, self.end + adjust, self.stride)
|
|
|
|
for i in numbers:
|
|
try:
|
|
formatted = self.format % i
|
|
yield formatted
|
|
except (ValueError, TypeError):
|
|
raise AnsibleError(
|
|
"problem formatting %r with %r" % (i, self.format)
|
|
)
|
|
|
|
def run(self, terms, variables, **kwargs):
|
|
results = []
|
|
|
|
for term in terms:
|
|
try:
|
|
self.reset() # clear out things for this iteration
|
|
try:
|
|
if not self.parse_simple_args(term):
|
|
self.parse_kv_args(parse_kv(term))
|
|
except AnsibleError:
|
|
raise
|
|
except Exception as e:
|
|
raise AnsibleError("unknown error parsing with_sequence arguments: %r. Error was: %s" % (term, e))
|
|
|
|
self.sanity_check()
|
|
if self.stride != 0:
|
|
results.extend(self.generate_sequence())
|
|
except AnsibleError:
|
|
raise
|
|
except Exception as e:
|
|
raise AnsibleError(
|
|
"unknown error generating sequence: %s" % e
|
|
)
|
|
|
|
return results
|