mirror of
https://github.com/ansible-collections/community.general.git
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331 lines
11 KiB
Python
331 lines
11 KiB
Python
# (c) 2012, Michael DeHaan <michael.dehaan@gmail.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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import sys
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import os
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import shlex
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import re
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import codecs
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import jinja2
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import yaml
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import optparse
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import operator
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from ansible import errors
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import ansible.constants as C
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try:
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import json
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except ImportError:
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import simplejson as json
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try:
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from hashlib import md5 as _md5
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except ImportError:
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from md5 import md5 as _md5
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###############################################################
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# UTILITY FUNCTIONS FOR COMMAND LINE TOOLS
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###############################################################
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def err(msg):
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''' print an error message to stderr '''
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print >> sys.stderr, msg
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def exit(msg, rc=1):
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''' quit with an error to stdout and a failure code '''
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err(msg)
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sys.exit(rc)
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def jsonify(result, format=False):
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''' format JSON output (uncompressed or uncompressed) '''
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result2 = result.copy()
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if format:
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return json.dumps(result2, sort_keys=True, indent=4)
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else:
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return json.dumps(result2, sort_keys=True)
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def write_tree_file(tree, hostname, buf):
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''' write something into treedir/hostname '''
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# TODO: might be nice to append playbook runs per host in a similar way
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# in which case, we'd want append mode.
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path = os.path.join(tree, hostname)
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fd = open(path, "w+")
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fd.write(buf)
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fd.close()
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def is_failed(result):
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''' is a given JSON result a failed result? '''
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return ((result.get('rc', 0) != 0) or (result.get('failed', False) in [ True, 'True', 'true']))
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def prepare_writeable_dir(tree):
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''' make sure a directory exists and is writeable '''
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if tree != '/':
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tree = os.path.realpath(os.path.expanduser(tree))
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if not os.path.exists(tree):
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try:
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os.makedirs(tree)
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except (IOError, OSError), e:
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exit("Could not make dir %s: %s" % (tree, e))
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if not os.access(tree, os.W_OK):
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exit("Cannot write to path %s" % tree)
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def path_dwim(basedir, given):
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''' make relative paths work like folks expect '''
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if given.startswith("/"):
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return given
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elif given.startswith("~/"):
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return os.path.expanduser(given)
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else:
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return os.path.join(basedir, given)
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def json_loads(data):
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''' parse a JSON string and return a data structure '''
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return json.loads(data)
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def parse_json(data):
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''' this version for module return data only '''
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try:
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return json.loads(data)
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except:
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# not JSON, but try "Baby JSON" which allows many of our modules to not
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# require JSON and makes writing modules in bash much simpler
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results = {}
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try:
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tokens = shlex.split(data)
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except:
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print "failed to parse json: "+ data
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raise
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for t in tokens:
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if t.find("=") == -1:
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raise errors.AnsibleError("failed to parse: %s" % data)
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(key,value) = t.split("=", 1)
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if key == 'changed' or 'failed':
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if value.lower() in [ 'true', '1' ]:
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value = True
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elif value.lower() in [ 'false', '0' ]:
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value = False
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if key == 'rc':
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value = int(value)
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results[key] = value
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if len(results.keys()) == 0:
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return { "failed" : True, "parsed" : False, "msg" : data }
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return results
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_LISTRE = re.compile(r"(\w+)\[(\d+)\]")
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def _varLookup(name, vars):
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''' find the contents of a possibly complex variable in vars. '''
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path = name.split('.')
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space = vars
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for part in path:
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if part in space:
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space = space[part]
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elif "[" in part:
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m = _LISTRE.search(part)
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if not m:
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return
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try:
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space = space[m.group(1)][int(m.group(2))]
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except (KeyError, IndexError):
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return
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else:
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return
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return space
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_KEYCRE = re.compile(r"\$(?P<complex>\{){0,1}((?(complex)[\w\.\[\]]+|\w+))(?(complex)\})")
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def varLookup(varname, vars):
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''' helper function used by varReplace '''
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m = _KEYCRE.search(varname)
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if not m:
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return None
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return _varLookup(m.group(2), vars)
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def varReplace(raw, vars):
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''' Perform variable replacement of $variables in string raw using vars dictionary '''
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# this code originally from yum
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done = [] # Completed chunks to return
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while raw:
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m = _KEYCRE.search(raw)
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if not m:
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done.append(raw)
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break
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# Determine replacement value (if unknown variable then preserve
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# original)
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varname = m.group(2)
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replacement = unicode(_varLookup(varname, vars) or m.group())
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start, end = m.span()
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done.append(raw[:start]) # Keep stuff leading up to token
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done.append(replacement) # Append replacement value
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raw = raw[end:] # Continue with remainder of string
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return ''.join(done)
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def template(text, vars):
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''' run a text buffer through the templating engine until it no longer changes '''
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prev_text = ''
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depth = 0
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while prev_text != text:
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depth = depth + 1
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if (depth > 20):
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raise errors.AnsibleError("template recursion depth exceeded")
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prev_text = text
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text = varReplace(unicode(text), vars)
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return text
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def template_from_file(basedir, path, vars):
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''' run a file through the templating engine '''
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environment = jinja2.Environment(loader=jinja2.FileSystemLoader(basedir), trim_blocks=False)
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data = codecs.open(path_dwim(basedir, path), encoding="utf8").read()
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t = environment.from_string(data)
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vars = vars.copy()
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res = t.render(vars)
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if data.endswith('\n') and not res.endswith('\n'):
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res = res + '\n'
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return template(res, vars)
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def parse_yaml(data):
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''' convert a yaml string to a data structure '''
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return yaml.load(data)
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def parse_yaml_from_file(path):
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''' convert a yaml file to a data structure '''
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try:
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data = file(path).read()
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except IOError:
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raise errors.AnsibleError("file not found: %s" % path)
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return parse_yaml(data)
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def parse_kv(args):
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''' convert a string of key/value items to a dict '''
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options = {}
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if args is not None:
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vargs = shlex.split(args, posix=True)
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for x in vargs:
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if x.find("=") != -1:
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k, v = x.split("=", 1)
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options[k]=v
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return options
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def md5(filename):
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''' Return MD5 hex digest of local file, or None if file is not present. '''
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if not os.path.exists(filename):
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return None
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digest = _md5()
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blocksize = 64 * 1024
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infile = open(filename, 'rb')
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block = infile.read(blocksize)
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while block:
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digest.update(block)
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block = infile.read(blocksize)
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infile.close()
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return digest.hexdigest()
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def default(value, function):
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''' syntactic sugar around lazy evaluation of defaults '''
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if value is None:
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return function()
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return value
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####################################################################
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# option handling code for /usr/bin/ansible and ansible-playbook
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# below this line
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class SortedOptParser(optparse.OptionParser):
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'''Optparser which sorts the options by opt before outputting --help'''
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def format_help(self, formatter=None):
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self.option_list.sort(key=operator.methodcaller('get_opt_string'))
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return optparse.OptionParser.format_help(self, formatter=None)
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def base_parser(constants=C, usage="", output_opts=False, runas_opts=False, async_opts=False, connect_opts=False):
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''' create an options parser for any ansible script '''
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parser = SortedOptParser(usage)
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parser.add_option('-v','--verbose', default=False, action="store_true",
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help='verbose mode')
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parser.add_option('-f','--forks', dest='forks', default=constants.DEFAULT_FORKS, type='int',
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help="specify number of parallel processes to use (default=%s)" % constants.DEFAULT_FORKS)
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parser.add_option('-i', '--inventory-file', dest='inventory',
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help="specify inventory host file (default=%s)" % constants.DEFAULT_HOST_LIST,
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default=constants.DEFAULT_HOST_LIST)
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parser.add_option('-k', '--ask-pass', default=False, dest='ask_pass', action='store_true',
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help='ask for SSH password')
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parser.add_option('--private-key', default=None, dest='private_key_file',
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help='use this file to authenticate the connection')
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parser.add_option('-K', '--ask-sudo-pass', default=False, dest='ask_sudo_pass', action='store_true',
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help='ask for sudo password')
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parser.add_option('-M', '--module-path', dest='module_path',
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help="specify path(s) to module library (default=%s)" % constants.DEFAULT_MODULE_PATH,
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default=constants.DEFAULT_MODULE_PATH)
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parser.add_option('-T', '--timeout', default=constants.DEFAULT_TIMEOUT, type='int',
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dest='timeout',
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help="override the SSH timeout in seconds (default=%s)" % constants.DEFAULT_TIMEOUT)
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if output_opts:
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parser.add_option('-o', '--one-line', dest='one_line', action='store_true',
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help='condense output')
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parser.add_option('-t', '--tree', dest='tree', default=None,
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help='log output to this directory')
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if runas_opts:
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parser.add_option("-s", "--sudo", default=False, action="store_true",
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dest='sudo', help="run operations with sudo (nopasswd)")
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parser.add_option('-U', '--sudo-user', dest='sudo_user', help='desired sudo user (default=root)',
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default=None) # Can't default to root because we need to detect when this option was given
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parser.add_option('-u', '--user', default=constants.DEFAULT_REMOTE_USER,
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dest='remote_user',
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help='connect as this user (default=%s)' % constants.DEFAULT_REMOTE_USER)
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if connect_opts:
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parser.add_option('-c', '--connection', dest='connection',
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choices=C.DEFAULT_TRANSPORT_OPTS,
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default=C.DEFAULT_TRANSPORT,
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help="connection type to use (default=%s)" % C.DEFAULT_TRANSPORT)
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if async_opts:
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parser.add_option('-P', '--poll', default=constants.DEFAULT_POLL_INTERVAL, type='int',
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dest='poll_interval',
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help="set the poll interval if using -B (default=%s)" % constants.DEFAULT_POLL_INTERVAL)
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parser.add_option('-B', '--background', dest='seconds', type='int', default=0,
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help='run asynchronously, failing after X seconds (default=N/A)')
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return parser
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