The `command` module does not return stdout & sterr when calling
a non existing executable or an unknown exception arises. This fix
lets the module return empty byte strings in those cases.
* arg_spec - move type checking lookup method to a function
* Change get_wanted_type name and behavior
Change the name to get_validator to bette describe what it is doing.
Change the interface to always return a value. This lines up with the behavior of get_*
functions always returning something or None and check_* functions raising an
Exception if something went wrong during the check.
* Add param to check_type_str()
Not meant to be a long term fix, but gets tests passing. More work is needed to figure
out how to solve this cleanly.
* Remove private attribute mapping types to validator
Since the function that needs it has moved to parameters.py, there is no need to have it as
a attribute of AnsibleModule.
Update tests that were referencing the private attribute.
* Use private method for 'str' type
To avoid having to put the string conversion warning behavior in the check_type_str() method,
use the private _check_type_str() method for 'str' type.
Import CHECK_ARGUMENT_TYPES_DISPATCHER for backwards compalitibility and store it as
a private attribute.
Revert changes to support plugins that are referencing serf._CHECK_ARGUMENT_TYPES_DISPATCHER.
* Add changelog
* Change function name to better reflect its... function
* Change dict name to better reflect its contents
CHECK_ARGUMENT_TYPES_DISPATCHER --> DEFAULT_TYPE_VALIDATORS
* Fix changelog
* file: add symlink is in a sticky directory tests
* file: handle symlink in a sticky directory
Co-Authored-By: Sviatoslav Sydorenko <wk.cvs.github@sydorenko.org.ua>
* Add changelog and fix unit test
The builtins import was removed since it was unused, but it is now needed.
* Move _syslog_facitily to __init__
No good reason it should not be set for each object
* Move internal property setting to private method
* Create check_arguments() function
* Remove unused import
* Rename function to better match its behavior
Change the behavior to return a set, either empty or populated, with unsupported keys.
Accept legal_inputs as optional which will not required calling handle_aliases before calling
get_unsupported_parameters().
* Add changelog
* Rework function behavior and documentation
I realized I missed the original intent of this method when moving it to a function. It
is meant to compared the parameter keys to legal inputs always, not compare
parameter keys to argument spec keys, even though the argument spec keys should
be a subset of legal inputs.
* Add tests
* Fix typo.
* Set internal properties when handling suboptions
* Let get_file_attributes() work without `lsattr -v`
Change:
- module_utils's get_file_attributes() expects `lsattr -v` to work, but
in some cases, it may not.
- The function now takes an optional include_version bool parameter,
which removes this expectation.
- Places where we call get_file_attributes() without using the 'version'
it returns, we now call it with include_version=False.
Test Plan:
- New unit tests
Signed-off-by: Rick Elrod <rick@elrod.me>
* Revert "Change default file permissions so they are not world readable (#70221)"
This reverts commit 5260527c4a.
* Revert "Fix warning for new default permissions when mode is not specified (#70976)"
This reverts commit dc79528cc6.
Follow up to #70221
Related to #67794
CVE-2020-1736
When set_mode_if_different() is called with mode of 'None', ensure we issue
a warning about the change in default permissions.
Add integration tests to ensure the warning works properly.
* Fix tests
- actually use custom module 🤦♂️
- verify file permission on created files
- use remote_tmp_dir so we're ready for split controller
- improve test module so we can skip the call to set_fs_attributes_if_different()
- fix tests for CentOS 6
* Change default file permissions so they are not world readable
CVE-2020-1736
Set the default permissions for files we create with atomic_move() to 0o0660. Track
which files we create that did not exist and warn if the module supports 'mode'
and it was not specified and the module did not call set_mode_if_different(). This allows the user to take action and specify a mode rather than using the defaults.
A code audit is needed to find all instances of modules that call atomic_move()
but do not call set_mode_if_different(). The findings need to be documented in
a changelog since we are not warning. Warning in those instances would be frustrating
to the user since they have no way to change the module code.
- use a set for storing list of created files
- just check the argument spac and params rather than using another property
- improve the warning message to include the default permissions
Some platform such as ESXi does not implement EpollSelector,
which is selected by DefaultSelector. Use SelectSelector which is
based upon 'select' implementation. This works perfectly with
a platform like VMware ESXi.
Fixes: #70238
Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
Change:
- module_utils.basic.is_special_selinux_path() used a string ==
bytestring comparison which returned False and made Ansible think that
certain filesystems aren't, in fact, special-cased, when they should
be. Ensure both sides of the == are bytestrings.
Test Plan:
- Added `copy` integration tests for this case.
Tickets:
- Fixes#70244
Signed-off-by: Rick Elrod <rick@elrod.me>
Change:
- In certain situations, such as when the input string contains null
bytes (\0), syslog.syslog will throw a TypeError. Handle that and
fail_json instead.
Test Plan:
- New test
- ansible-test --docker centos[68] (for py2 and py3 respectively)
Tickets:
- Refs #70269
Signed-off-by: Rick Elrod <rick@elrod.me>
* Allow to specify collection_name separately for deprecation.
* Use new functionality in Ansible.
* Use new functionality in tests.
* Update tagging/untagging functions.
* Update pylint deprecated sanity test.
* Update validate-modules. Missing are basic checks for version_added (validate semantic version format for collections).
* Improve version validation. Re-add version_added validation.
* Make sure collection names are added to return docs before schema validation.
* Extra checks to avoid crashes on bad data.
* Make C# module utils code work, and update/extend tests.
* Add changelog fragment.
* Stop extracting collection name from potentially tagged versions/dates.
* Simplify C# code.
* Update Windows modules docs.
* Forgot semicolons.
* Allow to deprecate options and aliases by date instead of only by version.
* Update display.deprecate().
* Adjust behavior to conform to tested behavior, extend tests, and improve C# style.
* Parse date and fail on invalid date.
This is mainly to make sure that people start using invalid dates, and we eventually have a mess to clean up.
* C# code: improve validation and update/extend tests.
* Make sure that deprecate() is not called with both date and version.
* Forgot to remove no longer necessary formatting.
* Adjust order of warnings in C# code.
* Adjust unrelated test.
* Fix grammar (and make that test pass).
* Don't parse date, and adjust message to be same as in #67684.
* Sanity tests: disable date in past test.
* Validate-modules: validate ISO 8601 date format.
* Validate-modules: switch schema declaration for deprecated_aliases to improve error messages for invalid dates.
* Use DateTime instead of string for date deprecation.
* Validate that date in deprecated_aliases is actually a DateTime.
* Fix tests.
* Fix rebasing error.
* Adjust error codes for pylint, and add removed_at_date and deprecated_aliases.date checks to validate-modules.
* Make deprecation date in the past error codes optional.
* Make sure not both version and date are specified for AnsibleModule.deprecate() calls.
* Stop using Python 3.7+ API.
* Make sure errors are actually reported. Re-add 'ansible-' prefix.
* Avoid crashing when 'name' isn't there.
* Linting.
* Update lib/ansible/module_utils/csharp/Ansible.Basic.cs
Co-authored-by: Jordan Borean <jborean93@gmail.com>
* Adjust test to latest change.
* Prefer date over version if both end up in Display.deprecated().
Co-authored-by: Jordan Borean <jborean93@gmail.com>
* Fix filedescriptor out of range in select() when running commands
* Simplify the run_command() code
Now that we're using selectors in run_command(), we can simplify some of
the code.
* Use fileobj.read() instead of os.read()
* No longer use get_buffer_size() as we can just slurp all of the data
instead.
Also use a simpler conditional check of whether the selector map is
empty
Co-authored-by: Toshio Kuratomi <a.badger@gmail.com>
fial_json() requires a message be given to it to inform the end user of
why the module failed. Prior to this commit, the message had to be a
keyword argument:
module.fail_json(msg='Failed due to error')
Since this is a required parameter, this commit allows the message to be
given as a positional argument instead:
module.fail_json('Failed due to an error')
* Make validate-modules stop ignore FILE_COMMON_ARGUMENTS.
* Add types to FILE_COMMON_ARGUMENTS and update document fragment to match it.
* Update ignore.txt.
* Add changelog.
* Clean up FILE_COMMON_ARGUMENTS.
* postgresql_pg_hba doesn't declare the backup option.
* uri doesn't declare the remote_src option.
* Add documentation.
* maven_artifact seems to use directory_mode, which it doesn't declare.
* Update changelogs/fragments/66389-file-common-arguments.yml
Update docs/docsite/rst/porting_guides/porting_guide_2.10.rst
ci_complete
Co-Authored-By: Jill R <4121322+jillr@users.noreply.github.com>
This makes it behave in a more idiomatic way
* Fix bug in Darwin facts for free memory
If the vm_stat command is not found, fact gathering would fail with an unhelpful
error message. Handle this gracefully and return a default value for free memory.
* Add unit tests
* Move warn() and deprecate() methods out of basic.py
* Use _global_warnings and _global_deprications and create accessor functions
- This lays the foundation for future functions being moved outside of AnsibleModule
that need an interface to warnings and deprecations without modifying them.
* Add unit tests for new warn and deprecate functions
On Python 2, leave all fds open since there is no mechanism to close specific fds with subprocess.Popen() on Python 2
Add unit tests.
Co-authored-by: Matt Martz <matt@sivel.net>
As AnsibleModule._log_invocation is currently implemented, any parameter
with a name that matches PASSWORD_MATCH triggers the no_log warning as a
precaution against parameters that may contain sensitive data, but have not
been marked as sensitive by the module author.
This patch would allow module authors to explicitly mark the aforementioned
parameters as not sensitive thereby bypassing an erroneous warning message,
while still catching parameters which have not been marked at all by the
author.
Adds tests for various no_log states including True, False, and None (as
extracted by AnsibleModule._log_invocation) when applied to an argument with
a name that matches PASSWORD_MATCH.
Fixes: #49465#64656
* Get no_log parameters from subspec
* Add changelog and unit tests
* Handle list of dicts in suboptions
Add fancy error message (this will probably haunt me)
* Update unit tests to test for list of dicts in suboptions
* Add integration tests
* Validate parameters in dict and list
In case it comes in as a string
* Make changes based on feedback, fix tests
* Simplify validators since we only need to validate dicts
Add test for suboptions passed in as strings to ensure they get validated properly and turned into a dictionary.
ci_complete
* Add a few more integration tests
* Deprecate alias 'thirsty' from all usages
Fixes: #61236
* Now with added version quoting
* Handle deprecated aliases in mod_utils
* Make alias deprecation a subkey of the canonical arg, and not a separate argument
* Add information how to change Python interpreter used by Ansible.
* Update lib/ansible/module_utils/basic.py
Co-Authored-By: Abhijeet Kasurde <akasurde@redhat.com>
* Make test less dependent on exact message.
* Print warning when both an option and its alias is specified.
* Improve output.
* Put warnings into self._warnings directly, resp. use self.warn() when handling subspecs.
* Add changelog.
* Add unit test.
ansible-test only passes files which have the .py suffix for sanity
tests on python files. This change will allow sanity tests to run on
the Python files in hacking/
* Rename test-module to test-module.py
* Symlink test-module for backwards compat since end users may be using
test-module
* Fix test-module sanity errors that are now triggered
* Rename ansible_profile to ansible-profile.py
* Rename build-ansible
* fix missing attribs with dirct module execution
* also make remote tmp handling smarter
update tests
* set default if attrib does not exist
* add simple test
* Move check_type_str() out of basic.py
* Move check_type_list() out of basic.py
* Move safe_eval() out of basic.py
* Move check_type_dict() out of basic.py
* Move json importing code to common location
* Move check_type_bool() out of basic.py
* Move _check_type_int() out of basic.py
* Move _check_type_float() out of basic.py
* Move _check_type_path() out of basic.py
* Move _check_type_raw() out of basic.py
* Move _check_type_bytes() out of basic.py
* Move _check_type_bits() out of basic.py
* Create text.formatters.py
Move human_to_bytes, bytes_to_human, and _lenient_lowercase out of basic.py into text.formatters.py
Change references in modules to point to function at new location
* Move _check_type_jsonarg() out of basic.py
* Rename json related functions and put them in common.text.converters
Move formatters.py to common.text.formatters.py and update references in modules.
* Rework check_type_str()
Add allow_conversion option to make the function more self-contained.
Move the messaging back to basic.py since those error messages are more relevant to using this function in the context of AnsibleModule and not when using the function in isolation.
* Add unit tests for type checking functions
* Change _lenient_lowercase to lenient_lowercase per feedback
* Rename method and make private
* Use is_iterable, combine transformations
* Remove unused return_values from network modules
* Improve docstrings in new functions
* Add new PASS_VAR
* Add unit tests for list_no_log_values
* Fix unit tests for Python 2.6
Refinements:
- return legal_inputs and update class properties
- remove redundant arguments from method and handle in caller
- add better exception types to method
* Add unit tests for handle_aliases
* Revert "use list instead of tuple and remove md5 on ValueError (#51357)" c459f040da.
* Modify the correct variable when determining available hashing algorithms
Leave it up to the module to return the state in the results.
I went through all the modules in files/ and only found one case where the module needed to return this. No other modules return paths that do not exists.
Signed-off-by: Sam Doran <sdoran@redhat.com>
* Add new module property to Windows modules
* Add brief pause to file tests to ensure the stat times are not equal, which was happening sometimes.
* Raise TypeError on error rather than fail_json()
* Rework error message to be less verbose
* Add porting guide entry
* Add support for elements validation in argspec
Fixes#48473
* Add support to validate the elements value in argspec
when type is `list`
* Fix unit test failures
* Add unit test for elements validation
* Fix CI failures
* Fix review comments
* Fix unit test and CI failures after rebase
* Introduce new "required_by' argument_spec option
This PR introduces a new **required_by** argument_spec option which allows you to say *"if parameter A is set, parameter B and C are required as well"*.
- The difference with **required_if** is that it can only add dependencies if a parameter is set to a specific value, not when it is just defined.
- The difference with **required_together** is that it has a commutative property, so: *"Parameter A and B are required together, if one of them has been defined"*.
As an example, we need this for the complex options that the xml module provides. One of the issues we often see is that users are not using the correct combination of options, and then are surprised that the module does not perform the requested action(s).
This would be solved by adding the correct dependencies, and mutual exclusives. For us this is important to get this shipped together with the new xml module in Ansible v2.4. (This is related to bugfix https://github.com/ansible/ansible/pull/28657)
```python
module = AnsibleModule(
argument_spec=dict(
path=dict(type='path', aliases=['dest', 'file']),
xmlstring=dict(type='str'),
xpath=dict(type='str'),
namespaces=dict(type='dict', default={}),
state=dict(type='str', default='present', choices=['absent',
'present'], aliases=['ensure']),
value=dict(type='raw'),
attribute=dict(type='raw'),
add_children=dict(type='list'),
set_children=dict(type='list'),
count=dict(type='bool', default=False),
print_match=dict(type='bool', default=False),
pretty_print=dict(type='bool', default=False),
content=dict(type='str', choices=['attribute', 'text']),
input_type=dict(type='str', default='yaml', choices=['xml',
'yaml']),
backup=dict(type='bool', default=False),
),
supports_check_mode=True,
required_by=dict(
add_children=['xpath'],
attribute=['value', 'xpath'],
content=['xpath'],
set_children=['xpath'],
value=['xpath'],
),
required_if=[
['count', True, ['xpath']],
['print_match', True, ['xpath']],
],
required_one_of=[
['path', 'xmlstring'],
['add_children', 'content', 'count', 'pretty_print', 'print_match', 'set_children', 'value'],
],
mutually_exclusive=[
['add_children', 'content', 'count', 'print_match','set_children', 'value'],
['path', 'xmlstring'],
],
)
```
* Rebase and fix conflict
* Add modules that use required_by functionality
* Update required_by schema
* Fix rebase issue
* use list instead of tuple and remove md5 on ValueError
Signed-off-by: michael.sgarbossa <msgarbossa@cvs.com>
* convert algorithms to list and add comment
Signed-off-by: michael.sgarbossa <msgarbossa@cvs.com>
* only convert to list if algorithms is not None
Signed-off-by: michael.sgarbossa <msgarbossa@cvs.com>
* new fragment for PR 51357
Signed-off-by: michael.sgarbossa <msgarbossa@cvs.com>
* fix lint: remove blank line
* added timestamps to nxos_command module
nxos_command module now returns timestamps field, which shows command execution time
* fixed unit test failure for /lib/ansible/module_utils/basic
* cosmetic changes to align with PEP 8
* Move get_all_subclasses out of sys_info as it is unrelated to system
information.
* get_all_subclasses now returns a set() instead of a list.
* Don't port get_platform to sys_info as it is deprecated. Code using
the common API should just use platform.system() directly.
* Rename load_platform_subclass() to get_platform_subclass and do not
instantiate the rturned class.
* Test the compat shims in module_utils/basic.py separately from the new
API in module_utils/common/sys_info.py and module_utils/common/_utils.py
* Revert "allow caller to deal with timeout (#49449)"
This reverts commit 63279823a7.
Flawed on many levels
* Adds poor API to a public function
* Papers over the fact that the public function is doing something bad
by catching exceptions it cannot handle in the first place
* Papers over the real cause of the issue which is a bug in the timeout
decorator
* Doesn't reraise properly
* Catches the wrong exception
Fixes#49824Fixes#49817
* Make the timeout decorator properly raise an exception outside of the function's scope
signal handlers which raise exceptions will never work well because the
exception can be raised anywhere in the called code. This leads to
exception race conditions where the exceptions could end up being
hanlded by unintended pieces of the called code.
The timeout decorator was using just that idiom. It was especially bad
because the decorator syntactically occurs outside of the called code
but because of the signal handler, the exception was being raised inside
of the called code.
This change uses a thread instead of a signal to manage the timeout in
parallel to the execution of the decorated function. Since raising of
the exception happens inside of the decorator, now, instead of inside of
a signal handler, the timeout exception is raised from outside of the
called code as expected which makes reasoning about where exceptions are
to be expected intuitive again.
Fixes#43884
* Add a common case test.
Adding an integration test driven from our unittests. Most of the time
we'll timeout in run_command which is running things in a subprocess.
Create a test for that specific case in case anything funky comes up
between threading and execve.
* Don't use OSError-based TimeoutError as a base class
Unlike most standard exceptions, OSError has a specific parameter list
with specific meanings. Instead follow the example of other stdlib
functions, concurrent.futures and multiprocessing and define a separate
TimeoutException.
* Add comment and docstring to point out that this is not hte Python3 TimeoutError
When there are spaces in command args passed as a list,
then run_command and underlying subprocess fails.
This can be overcome by passing command as string rather than list.
Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>
* fix(tasks: synchronize): wrap in sshpass if ssh password was provided
Closes#16616
* fix(tasks: synchronize): pass rsync password to sshpass via fd
* fix(tasks: synchronize): use fail_json instead of AnsibleError
* fixup! fix(tasks: synchronize): use fail_json instead of AnsibleError
fix python2 handling
* feat(module_utils: basic: run_command): add optional arguments `pass_fds` and `before_communicate_callback`
* fix(tasks: synchronize): use module.run_command instead of subprocess.Popen
* fixup! fix(tasks: synchronize): use module.run_command instead of subprocess.Popen
remove unused import
* fixup! fixup! fix(tasks: synchronize): use module.run_command instead of subprocess.Popen
pass_fds only if they passed to run_command()
Python sets the SIGPIPE handler to SIG_IGN. On execv() signal handlers are
reset to their defaults, EXCEPT those that are SIG_IGN which are left ignored.
In Python 3 subprocess.popen explicitly resets the SIGPIPE handler to SIG_DFL,
but unfortunately in Python 2.7 it does not. This leads to subprocesses being
executed with SIGPIPE ignored. This is often a problem with bash scripts which
rely on SIGPIPE to terminate commands in a pipe, but can easily be a problem
with other applications.
This implements the Python 3 behaviour for Python 2.7 by using a preexec_fn.
* Remove use of simplejson throughout code base. Fixes#42761
* Address failing tests
* Remove simplejson from contrib and other outlying files
* Add changelog fragment for simplejson removal
* actually check we can run scm command for roles
* a better error message than file not found
* more narrow exception hanlding
* refactor common functions for more extended use and further 'basic.py' separation
Now that we don't need to worry about python-2.4 and 2.5, we can make
some improvements to the way AnsiballZ handles modules.
* Change AnsiballZ wrapper to use import to invoke the module
We need the module to think of itself as a script because it could be
coded as:
main()
or as:
if __name__ == '__main__':
main()
Or even as:
if __name__ == '__main__':
random_function_name()
A script will invoke all of those. Prior to this change, we invoked
a second Python interpreter on the module so that it really was
a script. However, this means that we have to run python twice (once
for the AnsiballZ wrapper and once for the module). This change makes
the module think that it is a script (because __name__ in the module ==
'__main__') but it's actually being invoked by us importing the module
code.
There's three ways we've come up to do this.
* The most elegant is to use zipimporter and tell the import mechanism
that the module being loaded is __main__:
* 5959f11c9d/lib/ansible/executor/module_common.py (L175)
* zipimporter is nice because we do not have to extract the module from
the zip file and save it to the disk when we do that. The import
machinery does it all for us.
* The drawback is that modules do not have a __file__ which points
to a real file when they do this. Modules could be using __file__
to for a variety of reasons, most of those probably have
replacements (the most common one is to find a writable directory
for temporary files. AnsibleModule.tmpdir should be used instead)
We can monkeypatch __file__ in fom AnsibleModule initialization
but that's kind of gross. There's no way I can see to do this
from the wrapper.
* Next, there's imp.load_module():
* https://github.com/abadger/ansible/blob/340edf7489/lib/ansible/executor/module_common.py#L151
* imp has the nice property of allowing us to set __name__ to
__main__ without changing the name of the file itself
* We also don't have to do anything special to set __file__ for
backwards compatibility (although the reason for that is the
drawback):
* Its drawback is that it requires the file to exist on disk so we
have to explicitly extract it from the zipfile and save it to
a temporary file
* The last choice is to use exec to execute the module:
* https://github.com/abadger/ansible/blob/f47a4ccc76/lib/ansible/executor/module_common.py#L175
* The code we would have to maintain for this looks pretty clean.
In the wrapper we create a ModuleType, set __file__ on it, read
the module's contents in from the zip file and then exec it.
* Drawbacks: We still have to explicitly extract the file's contents
from the zip archive instead of letting python's import mechanism
handle it.
* Exec also has hidden performance issues and breaks certain
assumptions that modules could be making about their own code:
http://lucumr.pocoo.org/2011/2/1/exec-in-python/
Our plan is to use imp.load_module() for now, deprecate the use of
__file__ in modules, and switch to zipimport once the deprecation
period for __file__ is over (without monkeypatching a fake __file__ in
via AnsibleModule).
* Rename the name of the AnsiBallZ wrapped module
This makes it obvious that the wrapped module isn't the module file that
we distribute. It's part of trying to mitigate the fact that the module
is now named __main)).py in tracebacks.
* Shield all wrapper symbols inside of a function
With the new import code, all symbols in the wrapper become visible in
the module. To mitigate the chance of collisions, move most symbols
into a toplevel function. The only symbols left in the global namespace
are now _ANSIBALLZ_WRAPPER and _ansiballz_main.
revised porting guide entry
Integrate code coverage collection into AnsiballZ.
ci_coverage
ci_complete
* Only add exception/traceback on Python 3
On Python 2 the traceback could be any exception from the stack frame
and likely unrelated to the fail_json call.
On Python 3 the traceback is cleared outside any exception frame, so the
call always returns the most inner traceback (if any), and therefor is
most likely related to the fail_json call.
* Add uncertainty to traceback on Python 2
On Python 2 the last exception in the stack frame is being returned,
this could be unrelated to the actual error, especially if fail_json()
is called outside an except: block.
* Fix tmpdir on non root become
- also avoid exception if tmpdir and remote_tmp are None
- give 'None' on deescalation so tempfile will fallback to it's default behaviour
and use system dirs
- fix issue with bad tempdir (not existing/not createable/not writeable)
i.e nobody and ~/.ansible/tmp
- added tests for blockfile case
* Revert "Temporarily revert c119d54"
This reverts commit 5c614a59a6.
* changes based on PR feedback and changelog fragment
* changes based on the review
* Fix tmpdir when makedirs failed so we just use the system tmp
* Let missing remote_tmp fail
If remote_tmp is missing then there's something more basic wrong in the
communication from the controller to the module-side. It's better to
be alerted in this case than to silently ignore it.
jborean and I have independently checked what happens if the user sets
ansible_remote_tmp to empty string and !!null and both cases work fine.
(null is turned into a default value controller-side. empty string
triggers the warning because it is probably not a directory that the
become user is able to use).
* create module tmpdir based on remote_tmp
* Source remote_tmp from controller if possible
* Fixed sanity test and not use lambda
* Added expansion of env vars to the remote tmp
* Fixed sanity issues
* Added note around shell remote_tmp option
* Changed fallback tmp dir to ~/.ansible/tmp to make shell defaults
* Remove use of six.b as Python-2.6+ have byte literals.
* Make AnsibleModule a global object so we'll have access to it in all
the functions we're going to break this up into.
* Rework the parameters so things that are in file_common_args are used
from file_common_args or the reason for deviation is documented.
* Remove validate as a parameter: this should be taken care of by
removing it from params before the copy and template action plugin
invoke file.
* Rename diff_peek to _diff_peek as it is an internal parameter.
* add module_name execute_module call to assemble so that it is more greppable
Jordan Borean