xml – Manage bits and pieces of XML files or strings

Note

This module is part of the middleware_automation.common collection.

It is not included in ansible-core. To check whether it is installed, run ansible-galaxy collection list.

To install it, use: ansible-galaxy collection install middleware_automation.common. You need further requirements to be able to use this module, see Requirements for details.

To use it in a playbook, specify: middleware_automation.common.xml.

Synopsis

• A customized version of community.general.xml dedicated to runtimes configuration xpath/xslt.

Requirements

The below requirements are needed on the host that executes this module.

• lxml >= 3.0.0

Parameters

Parameter	Comments
add_children list / elements=any	Add additional child-element(s) to a selected element for a given xpath. Child elements must be given in a list and each item may be either a string (eg. children=ansible to add an empty <ansible/> child element), or a hash where the key is an element name and the value is the element value. This parameter requires xpath to be set.
attribute any	The attribute to select when using parameter value. This is a string, not prepended with @.
backup boolean	Create a backup file including the timestamp information so you can get the original file back if you somehow clobbered it incorrectly. Choices: false ← (default) true
content string	Search for a given xpath and get content. This parameter requires xpath to be set. Choices: "attribute" "text"
count boolean	Search for a given xpath and provide the count of any matches. This parameter requires xpath to be set. Choices: false ← (default) true
input_type string	Type of input for add_children and set_children. Choices: "xml" "yaml" ← (default)
insertafter boolean	Add additional child-element(s) after the last selected element for a given xpath. Child elements must be given in a list and each item may be either a string (eg. children=ansible to add an empty <ansible/> child element), or a hash where the key is an element name and the value is the element value. This parameter requires xpath to be set. Choices: false ← (default) true
insertbefore boolean	Add additional child-element(s) before the first selected element for a given xpath. Child elements must be given in a list and each item may be either a string (eg. children=ansible to add an empty <ansible/> child element), or a hash where the key is an element name and the value is the element value. This parameter requires xpath to be set. Choices: false ← (default) true
namespaces dictionary	The namespace prefix:uri mapping for the XPath expression. Needs to be a dict, not a list of items. Default: {}
path aliases: dest, file path	Path to the file to operate on. This file must exist ahead of time. This parameter is required, unless xmlstring is given.
pretty_print boolean	Pretty print XML output. Choices: false ← (default) true
print_match boolean	Search for a given xpath and print out any matches. This parameter requires xpath to be set. Choices: false ← (default) true
set_children list / elements=any	Set the child-element(s) of a selected element for a given xpath. Removes any existing children. Child elements must be specified as in add_children. This parameter requires xpath to be set.
state aliases: ensure string	Set or remove an xpath selection (node(s), attribute(s)). Choices: "absent" "present" ← (default)
strip_cdata_tags boolean	Remove CDATA tags surrounding text values. Note that this might break your XML file if text values contain characters that could be interpreted as XML. Choices: false ← (default) true
validate boolean	Perform schema validation of the XML input. This parameter requires xsd_path to be set. Choices: false ← (default) true
value any	Desired state of the selected attribute. Either a string, or to unset a value, the Python None keyword (YAML Equivalent, null). Elements default to no value (but present). Attributes default to an empty string.
xmlstring string	A string containing XML on which to operate. This parameter is required, unless path is given.
xpath string	A valid XPath expression describing the item(s) you want to manipulate. Operates on the document root, /, by default.
xsd_path path	Path to the xsd schema file to perform xml validation This file must exist ahead of time. This parameter is required when validate is true.

Notes

Note

• Use the --check and --diff options when testing your expressions.

• The diff output is automatically pretty-printed, so may not reflect the actual file content, only the file structure.

• This module does not handle complicated xpath expressions, so limit xpath selectors to simple expressions.

• Beware that in case your XML elements are namespaced, you need to use the namespaces parameter, see the examples.

• Namespaces prefix should be used for all children of an element where namespace is defined, unless another namespace is defined for them.

See Also

See also

Introduction to XPath

A brief tutorial on XPath (w3schools.com).

XPath Reference document

The reference documentation on XSLT/XPath (developer.mozilla.org).

Examples

# Consider the following XML file:
#
# <business type="bar">
#   <name>Tasty Beverage Co.</name>
#     <beers>
#       <beer>Rochefort 10</beer>
#       <beer>St. Bernardus Abbot 12</beer>
#       <beer>Schlitz</beer>
#    </beers>
#   <rating subjective="true">10</rating>
#   <website>
#     <mobilefriendly/>
#     <address>http://tastybeverageco.com</address>
#   </website>
# </business>

- name: Remove the 'subjective' attribute of the 'rating' element
  middleware_automation.common.xml:
    path: /foo/bar.xml
    xpath: /business/rating/@subjective
    state: absent

- name: Set the rating to '11'
  middleware_automation.common.xml:
    path: /foo/bar.xml
    xpath: /business/rating
    value: 11

# Retrieve and display the number of nodes
- name: Get count of 'beers' nodes
  middleware_automation.common.xml:
    path: /foo/bar.xml
    xpath: /business/beers/beer
    count: true
  register: hits

- ansible.builtin.debug:
    var: hits.count

# Example where parent XML nodes are created automatically
- name: Add a 'phonenumber' element to the 'business' element
  middleware_automation.common.xml:
    path: /foo/bar.xml
    xpath: /business/phonenumber
    value: 555-555-1234

- name: Add several more beers to the 'beers' element
  middleware_automation.common.xml:
    path: /foo/bar.xml
    xpath: /business/beers
    add_children:
    - beer: Old Rasputin
    - beer: Old Motor Oil
    - beer: Old Curmudgeon

- name: Add several more beers to the 'beers' element and add them before the 'Rochefort 10' element
  middleware_automation.common.xml:
    path: /foo/bar.xml
    xpath: '/business/beers/beer[text()="Rochefort 10"]'
    insertbefore: true
    add_children:
    - beer: Old Rasputin
    - beer: Old Motor Oil
    - beer: Old Curmudgeon

# NOTE: The 'state' defaults to 'present' and 'value' defaults to 'null' for elements
- name: Add a 'validxhtml' element to the 'website' element
  middleware_automation.common.xml:
    path: /foo/bar.xml
    xpath: /business/website/validxhtml

- name: Add an empty 'validatedon' attribute to the 'validxhtml' element
  middleware_automation.common.xml:
    path: /foo/bar.xml
    xpath: /business/website/validxhtml/@validatedon

- name: Add or modify an attribute, add element if needed
  middleware_automation.common.xml:
    path: /foo/bar.xml
    xpath: /business/website/validxhtml
    attribute: validatedon
    value: 1976-08-05

# How to read an attribute value and access it in Ansible
- name: Read an element's attribute values
  middleware_automation.common.xml:
    path: /foo/bar.xml
    xpath: /business/website/validxhtml
    content: attribute
  register: xmlresp

- name: Show an attribute value
  ansible.builtin.debug:
    var: xmlresp.matches[0].validxhtml.validatedon

- name: Remove all children from the 'website' element (option 1)
  middleware_automation.common.xml:
    path: /foo/bar.xml
    xpath: /business/website/*
    state: absent

- name: Remove all children from the 'website' element (option 2)
  middleware_automation.common.xml:
    path: /foo/bar.xml
    xpath: /business/website
    set_children: []

# In case of namespaces, like in below XML, they have to be explicitly stated.
#
# <foo xmlns="http://x.test" xmlns:attr="http://z.test">
#   <bar>
#     <baz xmlns="http://y.test" attr:my_namespaced_attribute="true" />
#   </bar>
# </foo>

# NOTE: There is the prefix 'x' in front of the 'bar' element, too.
- name: Set namespaced '/x:foo/x:bar/y:baz/@z:my_namespaced_attribute' to 'false'
  middleware_automation.common.xml:
    path: foo.xml
    xpath: /x:foo/x:bar/y:baz
    namespaces:
      x: http://x.test
      y: http://y.test
      z: http://z.test
    attribute: z:my_namespaced_attribute
    value: 'false'

- name: Adding building nodes with floor subnodes from a YAML variable
  middleware_automation.common.xml:
    path: /foo/bar.xml
    xpath: /business
    add_children:
      - building:
          # Attributes
          name: Scumm bar
          location: Monkey island
          # Subnodes
          _:
            - floor: Pirate hall
            - floor: Grog storage
            - construction_date: "1990"  # Only strings are valid
      - building: Grog factory

# Consider this XML for following example -
#
# <config>
#   <element name="test1">
#     <text>part to remove</text>
#   </element>
#   <element name="test2">
#     <text>part to keep</text>
#   </element>
# </config>

- name: Delete element node based upon attribute
  middleware_automation.common.xml:
    path: bar.xml
    xpath: /config/element[@name='test1']
    state: absent

Return Values

Common return values are documented here, the following are the fields unique to this module:

Key	Description
actions dictionary	A dictionary with the original xpath, namespaces and state. Returned: success Sample: {"namespaces": ["namespace1", "namespace2"], "state=present": null, "xpath": "xpath"}
backup_file string	The name of the backup file that was created Returned: when backup=true Sample: "/path/to/file.xml.1942.2017-08-24@14:16:01~"
count integer	The count of xpath matches. Returned: when parameter 'count' is set Sample: 2
matches list / elements=string	The xpath matches found. Returned: when parameter 'print_match' is set
msg string	A message related to the performed action(s). Returned: always
xmlstring string	An XML string of the resulting output. Returned: when parameter 'xmlstring' is set

Authors

• Tim Bielawa (@tbielawa)

• Magnus Hedemark (@magnus919)

• Dag Wieers (@dagwieers)

• Guido Grazioli (@ggraziol)