Merge pull request #12165 from amenonsen/address-parsing
Hi @amenonsen - thanks for fixing up the hunting down the unicode bug and expanding test_addresses. The code looks good, merging!-- Be systematic about parsing and validating hostnames and addresses
This commit is contained in:
Chrrrles Paul
commit
ba7734b78b
8 changed files with 309 additions and 145 deletions
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@ -33,6 +33,7 @@ from ansible.inventory.group import Group
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from ansible.inventory.host import Host
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from ansible.plugins import vars_loader
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from ansible.utils.vars import combine_vars
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from ansible.parsing.utils.addresses import parse_address
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try:
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from __main__ import display
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@ -83,27 +84,16 @@ class Inventory(object):
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host_list = host_list.split(",")
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host_list = [ h for h in host_list if h and h.strip() ]
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self.parser = None
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if host_list is None:
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self.parser = None
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pass
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elif isinstance(host_list, list):
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self.parser = None
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all = Group('all')
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self.groups = [ all ]
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ipv6_re = re.compile('\[([a-f:A-F0-9]*[%[0-z]+]?)\](?::(\d+))?')
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for x in host_list:
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m = ipv6_re.match(x)
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if m:
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all.add_host(Host(m.groups()[0], m.groups()[1]))
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else:
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if ":" in x:
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tokens = x.rsplit(":", 1)
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# if there is ':' in the address, then this is an ipv6
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if ':' in tokens[0]:
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all.add_host(Host(x))
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else:
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all.add_host(Host(tokens[0], tokens[1]))
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else:
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all.add_host(Host(x))
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for h in host_list:
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(host, port) = parse_address(h, allow_ranges=False)
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all.add_host(Host(host, port))
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elif self._loader.path_exists(host_list):
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#TODO: switch this to a plugin loader and a 'condition' per plugin on which it should be tried, restoring 'inventory pllugins'
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if self._loader.is_directory(host_list):
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@ -44,7 +44,7 @@ def detect_range(line = None):
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Returnes True if the given line contains a pattern, else False.
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'''
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if 0 <= line.find("[") < line.find(":") < line.find("]"):
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if '[' in line:
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return True
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else:
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return False
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@ -29,6 +29,7 @@ from ansible.inventory.host import Host
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from ansible.inventory.group import Group
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from ansible.inventory.expand_hosts import detect_range
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from ansible.inventory.expand_hosts import expand_hostname_range
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from ansible.parsing.utils.addresses import parse_address
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from ansible.utils.unicode import to_unicode, to_bytes
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class InventoryParser(object):
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@ -265,30 +266,20 @@ class InventoryParser(object):
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optional port number that applies to all of them.
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'''
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# Is a port number specified?
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#
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# This may be a mandatory :NN suffix on any square-bracketed expression
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# (IPv6 address, IPv4 address, host name, host pattern), or an optional
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# :NN suffix on an IPv4 address, host name, or pattern. IPv6 addresses
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# must be in square brackets if a port is specified.
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# Can the given hostpattern be parsed as a host with an optional port
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# specification?
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port = None
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(pattern, port) = parse_address(hostpattern, allow_ranges=True)
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if not pattern:
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self._raise_error("Can't parse '%s' as host[:port]" % hostpattern)
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for type in ['bracketed_hostport', 'hostport']:
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m = self.patterns[type].match(hostpattern)
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if m:
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(hostpattern, port) = m.groups()
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continue
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# Once we have separated the pattern, we expand it into list of one or
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# more hostnames, depending on whether it contains any [x:y] ranges.
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# Now we're left with just the pattern, which results in a list of one
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# or more hostnames, depending on whether it contains any [x:y] ranges.
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#
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# FIXME: We could be more strict here about validation.
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if detect_range(hostpattern):
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hostnames = expand_hostname_range(hostpattern)
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if detect_range(pattern):
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hostnames = expand_hostname_range(pattern)
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else:
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hostnames = [hostpattern]
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hostnames = [pattern]
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return (hostnames, port)
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@ -374,29 +365,3 @@ class InventoryParser(object):
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$ # end of the line
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''', re.X
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)
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# The following patterns match the various ways in which a port number
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# may be specified on an IPv6 address, IPv4 address, hostname, or host
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# pattern. All of the above may be enclosed in square brackets with a
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# mandatory :NN suffix; or all but the first may be given without any
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# brackets but with an :NN suffix.
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self.patterns['bracketed_hostport'] = re.compile(
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r'''^
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\[(.+)\] # [host identifier]
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:([0-9]+) # :port number
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$
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''', re.X
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)
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self.patterns['hostport'] = re.compile(
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r'''^
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((?: # We want to match:
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[^:\[\]] # (a non-range character
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| # ...or...
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\[[^\]]*\] # a complete bracketed expression)
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)*) # repeated as many times as possible
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:([0-9]+) # followed by a port number
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$
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''', re.X
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)
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208
lib/ansible/parsing/utils/addresses.py
Normal file
208
lib/ansible/parsing/utils/addresses.py
Normal file
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@ -0,0 +1,208 @@
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# Copyright 2015 Abhijit Menon-Sen <ams@2ndQuadrant.com>
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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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# Make coding more python3-ish
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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import re
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# Components that match a numeric or alphanumeric begin:end or begin:end:step
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# range expression inside square brackets.
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numeric_range = r'''
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\[
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(?:[0-9]+:[0-9]+) # numeric begin:end
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(?::[0-9]+)? # numeric :step (optional)
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\]
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'''
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alphanumeric_range = r'''
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\[
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(?:
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[a-z]:[a-z]| # one-char alphabetic range
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[0-9]+:[0-9]+ # ...or a numeric one
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)
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(?::[0-9]+)? # numeric :step (optional)
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\]
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'''
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# Components that match a 16-bit portion of an IPv6 address in hexadecimal
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# notation (0..ffff) or an 8-bit portion of an IPv4 address in decimal notation
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# (0..255) or an [x:y(:z)] numeric range.
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ipv6_component = r'''
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(?:
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[0-9a-f]{{1,4}}| # 0..ffff
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{range} # or a numeric range
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)
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'''.format(range=numeric_range)
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ipv4_component = r'''
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(?:
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[01]?[0-9]{{1,2}}| # 0..199
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2[0-4][0-9]| # 200..249
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25[0-5]| # 250..255
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{range} # or a numeric range
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)
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'''.format(range=numeric_range)
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# A hostname label, e.g. 'foo' in 'foo.example.com'. Consists of alphanumeric
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# characters plus dashes (and underscores) or valid ranges. The label may not
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# start or end with a hyphen or an underscore. This is interpolated into the
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# hostname pattern below. We don't try to enforce the 63-char length limit.
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label = r'''
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(?:[\w]|{range}) # Starts with an alphanumeric or a range
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(?:[\w_-]|{range})* # Then zero or more of the same or [_-]
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(?<![_-]) # ...as long as it didn't end with [_-]
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'''.format(range=alphanumeric_range)
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patterns = {
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# This matches a square-bracketed expression with a port specification. What
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# is inside the square brackets is validated later.
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'bracketed_hostport': re.compile(
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r'''^
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\[(.+)\] # [host identifier]
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:([0-9]+) # :port number
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$
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''', re.X
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),
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# This matches a bare IPv4 address or hostname (or host pattern including
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# [x:y(:z)] ranges) with a port specification.
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'hostport': re.compile(
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r'''^
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((?: # We want to match:
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[^:\[\]] # (a non-range character
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| # ...or...
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\[[^\]]*\] # a complete bracketed expression)
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)*) # repeated as many times as possible
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:([0-9]+) # followed by a port number
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$
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''', re.X
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),
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# This matches an IPv4 address, but also permits range expressions.
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'ipv4': re.compile(
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r'''^
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(?:{i4}\.){{3}}{i4} # Three parts followed by dots plus one
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$
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'''.format(i4=ipv4_component), re.X|re.I
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),
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# This matches an IPv6 address, but also permits range expressions.
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#
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# This expression looks complex, but it really only spells out the various
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# combinations in which the basic unit of an IPv6 address (0..ffff) can be
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# written, from :: to 1:2:3:4:5:6:7:8, plus the IPv4-in-IPv6 variants such
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# as ::ffff:192.0.2.3.
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#
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# Note that we can't just use ipaddress.ip_address() because we also have to
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# accept ranges in place of each component.
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'ipv6': re.compile(
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r'''^
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(?:{0}:){{7}}{0}| # uncompressed: 1:2:3:4:5:6:7:8
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(?:{0}:){{1,6}}:| # compressed variants, which are all
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(?:{0}:)(?:{0}){{1,6}}| # a::b for various lengths of a,b
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(?:{0}:){{2}}(?::{0}){{1,5}}|
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(?:{0}:){{3}}(?::{0}){{1,4}}|
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(?:{0}:){{4}}(?::{0}){{1,3}}|
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(?:{0}:){{5}}(?::{0}){{1,2}}|
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(?:{0}:){{6}}(?::{0})| # ...all with 2 <= a+b <= 7
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:(?::{0}){{1,6}}| # ::ffff(:ffff...)
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{0}?::| # ffff::, ::
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# ipv4-in-ipv6 variants
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(?:0:){{6}}(?:{0}\.){{3}}{0}|
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::(?:ffff:)?(?:{0}\.){{3}}{0}|
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(?:0:){{5}}ffff:(?:{0}\.){{3}}{0}
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$
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'''.format(ipv6_component), re.X|re.I
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),
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# This matches a hostname or host pattern including [x:y(:z)] ranges.
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#
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# We roughly follow DNS rules here, but also allow ranges (and underscores).
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# In the past, no systematic rules were enforced about inventory hostnames,
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# but the parsing context (e.g. shlex.split(), fnmatch.fnmatch()) excluded
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# various metacharacters anyway.
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#
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# We don't enforce DNS length restrictions here (63 characters per label,
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# 253 characters total) or make any attempt to process IDNs.
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'hostname': re.compile(
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r'''^
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{label} # We must have at least one label
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(?:\.{label})* # Followed by zero or more .labels
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$
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'''.format(label=label), re.X|re.I|re.UNICODE
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),
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}
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def parse_address(address, allow_ranges=False):
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"""
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Takes a string and returns a (host, port) tuple. If the host is None, then
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the string could not be parsed as a host identifier with an optional port
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specification. If the port is None, then no port was specified.
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The host identifier may be a hostname (qualified or not), an IPv4 address,
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or an IPv6 address. If allow_ranges is True, then any of those may contain
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[x:y] range specifications, e.g. foo[1:3] or foo[0:5]-bar[x-z].
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The port number is an optional :NN suffix on an IPv4 address or host name,
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or a mandatory :NN suffix on any square-bracketed expression: IPv6 address,
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IPv4 address, or host name. (This means the only way to specify a port for
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an IPv6 address is to enclose it in square brackets.)
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"""
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# First, we extract the port number if one is specified.
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port = None
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for type in ['bracketed_hostport', 'hostport']:
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m = patterns[type].match(address)
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if m:
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(address, port) = m.groups()
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port = int(port)
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continue
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# What we're left with now must be an IPv4 or IPv6 address, possibly with
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# numeric ranges, or a hostname with alphanumeric ranges.
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host = None
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for type in ['ipv4', 'ipv6', 'hostname']:
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m = patterns[type].match(address)
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if m:
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host = address
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continue
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# If it isn't any of the above, we don't understand it.
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if not host:
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return (None, None)
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# If we get to this point, we know that any included ranges are valid. If
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# the caller is prepared to handle them, all is well. Otherwise we treat
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# it as a parse failure.
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if not allow_ranges and '[' in host:
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return (None, None)
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return (host, port)
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@ -23,6 +23,8 @@ __metaclass__ = type
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import re
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from ansible.plugins.action import ActionBase
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from ansible.parsing.utils.addresses import parse_address
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from ansible.errors import AnsibleError, AnsibleParserError
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class ActionModule(ActionBase):
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''' Create inventory hosts and groups in the memory inventory'''
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@ -40,9 +42,11 @@ class ActionModule(ActionBase):
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new_name = self._task.args.get('name', self._task.args.get('hostname', None))
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#vv("creating host via 'add_host': hostname=%s" % new_name)
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new_name, new_port = _parse_ip_host_and_port(new_name)
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if new_port:
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self._task.args['ansible_ssh_port'] = new_port
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name, port = parse_address(new_name, allow_ranges=False)
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if not name:
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raise AnsibleError("Invalid inventory hostname: %s" % new_name)
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if port:
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self._task.args['ansible_ssh_port'] = port
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groups = self._task.args.get('groupname', self._task.args.get('groups', self._task.args.get('group', '')))
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# add it to the group if that was specified
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@ -58,28 +62,4 @@ class ActionModule(ActionBase):
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if not k in [ 'name', 'hostname', 'groupname', 'groups' ]:
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host_vars[k] = self._task.args[k]
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return dict(changed=True, add_host=dict(host_name=new_name, groups=new_groups, host_vars=host_vars))
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def _parse_ip_host_and_port(hostname):
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"""
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Attempt to parse the hostname and port from a hostname, e.g.,
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some-host-name
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some-host-name:80
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8.8.8.8
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8.8.8.8:80
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2001:db8:0:1
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[2001:db8:0:1]:80
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"""
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if hostname.count(':') > 1:
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match = re.match(
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'\[(?P<ip>[^\]]+)\](:(?P<port>[0-9]+))?',
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hostname
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)
|
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if match:
|
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return match.group('ip'), match.group('port')
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else:
|
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return hostname, None
|
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elif ':' in hostname:
|
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return hostname.rsplit(':', 1)
|
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return hostname, None
|
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return dict(changed=True, add_host=dict(host_name=name, groups=new_groups, host_vars=host_vars))
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|
|
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@ -4,10 +4,9 @@
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connection: local
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vars:
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test_var: 'Ī ī Ĭ ĭ Į į İ ı IJ ij Ĵ ĵ Ķ ķ ĸ Ĺ ĺ Ļ ļ Ľ ľ Ŀ ŀ Ł ł Ń ń Ņ ņ Ň ň ʼn Ŋ ŋ Ō ō Ŏ ŏ Ő ő Œ'
|
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num_hosts: 5
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hostnames:
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- 'host-#ϬϭϮϯϰ'
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- 'host-ͰͱͲͳʹ͵'
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- 'host-ϬϭϮϯϰ'
|
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- 'host-fóöbär'
|
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- 'host-ΙΚΛΜΝΞ'
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- 'host-στυφχψ'
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- 'host-ϬϭϮϯϰϱ'
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@ -29,11 +28,11 @@
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- 'ā Ă ă Ą ą Ć ć Ĉ ĉ Ċ ċ Č č Ď ď Đ đ Ē ē Ĕ ĕ Ė ė Ę ę Ě ě Ĝ ĝ Ğ ğ Ġ ġ Ģ ģ Ĥ ĥ Ħ ħ Ĩ ĩ'
|
||||
|
||||
- add_host:
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||||
name: '{{hostnames}}.{{item}}'
|
||||
name: '{{item}}'
|
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groups: 'ĪīĬĭ'
|
||||
ansible_ssh_host: 127.0.0.1
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||||
ansible_connection: local
|
||||
host_id: '{{item}}'
|
||||
with_sequence: start=1 end={{num_hosts}} format=%d
|
||||
with_items: hostnames
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||||
|
||||
- name: 'A task with unicode extra vars'
|
||||
debug: var=extra_var
|
||||
|
|
|
|||
69
test/units/parsing/test_addresses.py
Normal file
69
test/units/parsing/test_addresses.py
Normal file
|
|
@ -0,0 +1,69 @@
|
|||
# -*- coding: utf-8 -*-
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||||
|
||||
import unittest
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||||
|
||||
from ansible.parsing.utils.addresses import parse_address
|
||||
|
||||
class TestParseAddress(unittest.TestCase):
|
||||
|
||||
tests = {
|
||||
# IPv4 addresses
|
||||
'192.0.2.3': ['192.0.2.3', None],
|
||||
'192.0.2.3:23': ['192.0.2.3', 23],
|
||||
|
||||
# IPv6 addresses
|
||||
'::': ['::', None],
|
||||
'::1': ['::1', None],
|
||||
'[::1]:442': ['::1', 442],
|
||||
'abcd:ef98:7654:3210:abcd:ef98:7654:3210': ['abcd:ef98:7654:3210:abcd:ef98:7654:3210', None],
|
||||
'[abcd:ef98:7654:3210:abcd:ef98:7654:3210]:42': ['abcd:ef98:7654:3210:abcd:ef98:7654:3210', 42],
|
||||
|
||||
# Hostnames
|
||||
'some-host': ['some-host', None],
|
||||
'some-host:80': ['some-host', 80],
|
||||
'some.host.com:492': ['some.host.com', 492],
|
||||
'[some.host.com]:493': ['some.host.com', 493],
|
||||
'a-b.3foo_bar.com:23': ['a-b.3foo_bar.com', 23],
|
||||
u'fóöbär': [u'fóöbär', None],
|
||||
u'fóöbär:32': [u'fóöbär', 32],
|
||||
u'fóöbär.éxàmplê.com:632': [u'fóöbär.éxàmplê.com', 632],
|
||||
|
||||
# Various errors
|
||||
'': [None, None],
|
||||
'some..host': [None, None],
|
||||
'some.': [None, None],
|
||||
'[example.com]': [None, None],
|
||||
'some-': [None, None],
|
||||
'some-.foo.com': [None, None],
|
||||
'some.-foo.com': [None, None],
|
||||
}
|
||||
|
||||
range_tests = {
|
||||
'192.0.2.[3:10]': ['192.0.2.[3:10]', None],
|
||||
'192.0.2.[3:10]:23': ['192.0.2.[3:10]', 23],
|
||||
'abcd:ef98::7654:[1:9]': ['abcd:ef98::7654:[1:9]', None],
|
||||
'[abcd:ef98::7654:[6:32]]:2222': ['abcd:ef98::7654:[6:32]', 2222],
|
||||
u'fóöb[a:c]r.éxàmplê.com:632': [u'fóöb[a:c]r.éxàmplê.com', 632],
|
||||
'[a:b]foo.com': ['[a:b]foo.com', None],
|
||||
'foo[a:b].com': ['foo[a:b].com', None],
|
||||
'foo[a:b]:42': ['foo[a:b]', 42],
|
||||
'foo[a-b]-.com': [None, None],
|
||||
'foo[a-b]:32': [None, None],
|
||||
'foo[x-y]': [None, None],
|
||||
}
|
||||
|
||||
def test_without_ranges(self):
|
||||
for t in self.tests:
|
||||
test = self.tests[t]
|
||||
|
||||
(host, port) = parse_address(t)
|
||||
assert host == test[0]
|
||||
assert port == test[1]
|
||||
|
||||
def test_with_ranges(self):
|
||||
for t in self.range_tests:
|
||||
test = self.range_tests[t]
|
||||
|
||||
(host, port) = parse_address(t, allow_ranges=True)
|
||||
assert host == test[0]
|
||||
assert port == test[1]
|
||||
|
|
@ -1,47 +0,0 @@
|
|||
import unittest
|
||||
|
||||
from ansible.plugins.action import add_host
|
||||
|
||||
|
||||
class TestAddHost(unittest.TestCase):
|
||||
|
||||
def test_hostname(self):
|
||||
host, port = add_host._parse_ip_host_and_port('some-remote-host')
|
||||
assert host == 'some-remote-host'
|
||||
assert port is None
|
||||
|
||||
def test_hostname_with_port(self):
|
||||
host, port = add_host._parse_ip_host_and_port('some-remote-host:80')
|
||||
assert host == 'some-remote-host'
|
||||
assert port == '80'
|
||||
|
||||
def test_parse_ip_host_and_port_v4(self):
|
||||
host, port = add_host._parse_ip_host_and_port('8.8.8.8')
|
||||
assert host == '8.8.8.8'
|
||||
assert port is None
|
||||
|
||||
def test_parse_ip_host_and_port_v4_and_port(self):
|
||||
host, port = add_host._parse_ip_host_and_port('8.8.8.8:80')
|
||||
assert host == '8.8.8.8'
|
||||
assert port == '80'
|
||||
|
||||
def test_parse_ip_host_and_port_v6(self):
|
||||
host, port = add_host._parse_ip_host_and_port(
|
||||
'dead:beef:dead:beef:dead:beef:dead:beef'
|
||||
)
|
||||
assert host == 'dead:beef:dead:beef:dead:beef:dead:beef'
|
||||
assert port is None
|
||||
|
||||
def test_parse_ip_host_and_port_v6_with_brackets(self):
|
||||
host, port = add_host._parse_ip_host_and_port(
|
||||
'[dead:beef:dead:beef:dead:beef:dead:beef]'
|
||||
)
|
||||
assert host == 'dead:beef:dead:beef:dead:beef:dead:beef'
|
||||
assert port is None
|
||||
|
||||
def test_parse_ip_host_and_port_v6_with_brackets_and_port(self):
|
||||
host, port = add_host._parse_ip_host_and_port(
|
||||
'[dead:beef:dead:beef:dead:beef:dead:beef]:80'
|
||||
)
|
||||
assert host == 'dead:beef:dead:beef:dead:beef:dead:beef'
|
||||
assert port == '80'
|
||||
Loading…
Reference in a new issue