Allow variable expressions to be stored as variables themselves, do some things to allow setup strings

to more easily contain spaces without being mangled, which is neccessary because of the above.
This commit is contained in:
Michael DeHaan 2012-03-21 20:00:48 -04:00
parent e89131a3a2
commit e6406fa5a7
4 changed files with 51 additions and 13 deletions

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@ -9,17 +9,39 @@
favcolor: "red"
ssn: 8675309
# Below we're going to define some expressions.
#
# Not only can we assign variables for reuse, but we can also assign conditional
# expressions. By keeping these in 'vars', the task section remains
# extraordinarily clean, and not littered with programming language
# constructs -- so it's easily skimmed by humans.
#
# Remember to quote any variables if they are not numbers!
#
# Interesting fact: aside from the $variables, these expressions are actually
# tiny bits of Python. They are evaluated in the context of each host, so different
# steps can be skipped on different hosts! They should evaluate to either True
# or False
is_favcolor_blue: "'$favcolor' == 'blue'"
# is_centos: "'$facter_operatingsystem' == 'CentOS'"
# NOTE:
#
# facter and ohai variables can be used in only_if statements too
# ex: "$facter_operatingsystem == 'CentOS'", which bubble up automatically
# ex: "'$facter_operatingsystem' == 'CentOS'", which bubble up automatically
# from the managed machines
#
# this example won't do that though, as you might not have facter or ohai,
# but you get the idea...
tasks:
- name: "do this if my favcolor is blue"
action: shell /bin/false
only_if: "'$favcolor' == 'blue'"
only_if: '$is_favcolor_blue'
- name: "do this if my favcolor is red"
action: shell /bin/false
only_if: "'$favcolor' == 'red'"
- name: "do this if my favcolor is not blue"
action: shell /bin/true
only_if: 'not ($is_favcolor_blue)'

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@ -27,6 +27,7 @@ import random
import traceback
import tempfile
import subprocess
import urllib
import ansible.constants as C
import ansible.connection
@ -295,16 +296,26 @@ class Runner(object):
args = module_args
if type(args) == list:
args = " ".join([ str(x) for x in module_args ])
if remote_module_path.endswith('setup'):
# briefly converting arguments to strings before file transfer
# causes some translation errors. This is a workaround only
# needed for the setup module
args = " ".join([ "\"%s\"" % str(x) for x in module_args ])
else:
args = " ".join([ str(x) for x in module_args ])
# by default the args to substitute in the action line are those from the setup cache
inject_vars = self.setup_cache.get(conn.host,{})
# see if we really need to run this or not...
conditional = utils.template(self.conditionally_execute_if, inject_vars)
if not eval(conditional):
return utils.smjson(dict(skipped=True))
# doubly templated so we can store a conditional expression in a variable!
conditional = utils.template(
utils.template(self.conditionally_execute_if, inject_vars),
inject_vars
)
if not eval(conditional):
return [ utils.smjson(dict(skipped=True)), 'skipped' ]
# if the host file was an external script, execute it with the hostname
# as a first parameter to get the variables to use for the host
@ -333,7 +344,7 @@ class Runner(object):
if not k.startswith('facter_') and not k.startswith('ohai_'):
if str(v).find(" ") != -1:
v = "\"%s\"" % v
args += " %s=%s" % (k, v)
args += " %s=%s" % (k, str(v).replace(" ","~~~"))
# the metadata location for the setup module is transparently managed
# since it's an 'internals' module, kind of a black box. See playbook

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@ -33,12 +33,18 @@ except ImportError:
if len(sys.argv) == 1:
sys.exit(1)
argfile = sys.argv[1]
if not os.path.exists(argfile):
sys.exit(1)
input_data = shlex.split(open(argfile, 'r').read())
new_options = dict([ x.split('=') for x in input_data ])
# turn urlencoded k=v string (space delimited) to regular k=v directionary
splitted = [x.split('=',1) for x in input_data ]
splitted = [ (x[0], x[1].replace("~~~"," ")) for x in splitted ]
new_options = dict(splitted)
ansible_file = new_options.get('metadata', DEFAULT_ANSIBLE_SETUP)
ansible_dir = os.path.dirname(ansible_file)

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@ -263,4 +263,3 @@
}
}
}