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Make sure all the lookup plugins are documented.

This commit is contained in:
Michael DeHaan 2013-02-02 11:51:25 -05:00
parent 318e3302fb
commit 0ae7f996f5
2 changed files with 53 additions and 29 deletions

View file

@ -276,17 +276,17 @@ In Ansible 0.8, a few shortcuts are available for testing whether a variable is
There is a matching 'is_unset' that works the same way. Quoting the variable inside the function is mandatory.
When combining `only_if` with `with_items`, be aware that the `only_if` statement is processed for each item.
This is a deliberate design::
When combining `only_if` with `with_items`, be aware that the `only_if` statement is processed seperately for each item.
This is by design::
tasks:
- action: command echo $item
with_item: [ 0, 2, 4, 6, 8, 10 ]
only_if: "$item > 5"
While `only_if` is a pretty good option for advanced users, it exposes more guts of the engine than we'd like, and
we can do better. In 0.9, we will be adding `when`, which will be like a syntactic sugar for `only_if` and hide
this level of complexity -- it will numerous built in operators.
While `only_if` is a pretty good option for advanced users, it exposes more guts than we'd like, and
we can do better. In 1.0, we added 'when', which is like syntactic sugar for `only_if` and hides
this level of complexity. See more on this below.
Conditional Execution (Simplified)
``````````````````````````````````
@ -435,8 +435,8 @@ More Loops
.. versionadded: 0.8
Various 'lookup plugins' allow additional ways to iterate over data. Ansible will have more of these
over time. In 0.8, the only lookup plugins that comes stock are 'with_fileglob' and 'with_sequence', but
you can also write your own.
over time. You can write your own, as is covered in the API section. Each typically takes a list and
can accept more than one parameter.
'with_fileglob' matches all files in a single directory, non-recursively, that match a pattern. It can
be used like this::
@ -451,26 +451,61 @@ be used like this::
# copy each file over that matches the given pattern
- action: copy src=$item dest=/etc/fooapp/ owner=root mode=600
with_fileglob: /playbooks/files/fooapp/*
with_fileglob:
- /playbooks/files/fooapp/*
.. versionadded: 0.9
Many new lookup abilities were added in 0.9. Remeber lookup plugins are run on the "controlling" machine::
---
- hosts: all
tasks:
- action: debug msg="$item is an environment variable"
with_env:
- HOME
- LANG
- action: debug msg="$item is a line from the result of this command"
with_lines:
- cat /etc/motd
- action: debug msg="$item is the raw result of running this command"
with_pipe:
- date
- action: debug msg="$item is value in Redis for somekey"
with_redis_kv:
- redis://localhost:6379,somekey
- action: debug msg="$item is a DNS TXT record for example.com"
with_dnstxt:
- example.com
- action: debug msg="$item is a value from evaluation of this template"
with_template:
- ./some_template.j2
.. versionadded: 1.0
'with_sequence' generates a sequence of items in ascending numerical order. You
can specify a 'start', an 'end' value (inclusive), and a 'stride' value (to skip
some numbers of values), and a printf-style 'format' string. It accepts
arguments both as key-value pairs and in a shortcut of the form
"[start-]end[/stride][:format]". All numerical values can be specified in
hexadecimal (i.e. 0x3f8) or octal (i.e. 0644). Negative numbers are not
supported. Here is an example that leverages most of its features::
can specify a start, end, and an optional step value.
----
Arguments can be either key-value pairs or as a shortcut in the format
"[start-]end[/stride][:format]". The format is a printf style string.
Numerical values can be specified in decimal, hexadecimal (0x3f8) or octal (0600).
Negative numbers are not supported. This works as follows::
---
- hosts: all
tasks:
# create groups
- group: name=evens state=present
- group: name=odds state=present
# create 32 test users
@ -484,17 +519,7 @@ supported. Here is an example that leverages most of its features::
- file: dest=/var/stuff/$item state=directory
with_sequence: start=4 end=16
The key-value form also supports a 'count' option, which always generates
'count' entries regardless of the stride. The count option is mostly useful for
avoiding off-by-one errors and errors calculating the number of entries in a
sequence when a stride is specified. The shortcut form cannot be used to
specify a count. As an example::
----
- hosts: all
tasks:
# a simpler way to use the sequence plugin
# create 4 groups
- group: name=group${item} state=present
with_sequence: count=4

View file

@ -30,8 +30,7 @@ import time
import datetime
import subprocess
import ansible.utils
from ansible.utils import module_docs
import ansible.utils.module_docs as module_docs
# Get parent directory of the directory this script lives in
MODULEDIR=os.path.abspath(os.path.join(