Error while readin split part for updating Ubuntu packages - Should I include the path of splitpath,py in playbook ?

[Work-Hard]

Hello, Please see below

ansible.cfg

[defaults]

inventory = ./hosts

splitpart.py = /etc/ansible/splitpart.py/

splitpart.py

def splitpart (value, index, char = ','):

    if isinstance(value, (list, tuple)):

        ret = []

        for v in value:

            ret.append(v.split(char)[index])

        return ret

    else:

        return value.split(char)[index]

class FilterModule(object):

    def filters(self):

        return {'splitpart': splitpart

playbook

  tasks:

    # do an "apt-get update", to ensure latest package lists

    - name: apt-get update

      apt:

        update-cache: yes

      changed_when: 0

    # get a list of packages that have updates

    - name: get list of pending upgrades

      command: apt-get --simulate dist-upgrade

      args:

        warn: false # don't warn us about apt having its own plugin

      register: apt_simulate

      changed_when: 0

    # pick out list of pending updates from command output. This essentially

    # takes the above output from "apt-get --simulate dist-upgrade", and

    # pipes it through "cut -f2 -d' ' | sort"

    - name: parse apt-get output to get list of changed packages

      set_fact:

        updates: '{{ apt_simulate.stdout_lines | select("match", "^Inst ") | list | splitpart(1, " ") | list | sort }}'

      changed_when: 0

    # tell user about packages being updated

    - name: show pending updates

      debug:

        var: updates

      when: updates.0 is defined

playbook output

PLAY [myotherserver] *****************************************************************************************************************************

TASK [Gathering Facts] ***************************************************************************************************************************

ok: [10.0.2.236]

TASK [apt-get update] ****************************************************************************************************************************

ok: [10.0.2.236]

TASK [get list of pending upgrades] **************************************************************************************************************

ok: [10.0.2.236]

TASK [parse apt-get output to get list of changed packages] **************************************************************************************

fatal: [10.0.2.236]: FAILED! => {"msg": "template error while templating string: no filter named 'splitpart'. String: {{ apt_simulate.stdout_lines | select(\"match\", \"^Inst \") | list | splitpart(1, \" \") | list | sort }}"}

PLAY RECAP ***************************************************************************************************************************************

10.0.2.236                 : ok=3    changed=0    unreachable=0    failed=1    skipped=0    rescued=0    ignored=0

[Dick Visser]

Hii

"splitpath.py" isn't a valid key for the config file. The correct one
is "filter_plugins", see:
https://docs.ansible.com/ansible/latest/reference_appendices/config.html#default-filter-plugin-path

But I don't see why you would need such heavy weapons if all you want
is a list of package names that have pending updates.
This should roughly do the same, without the complexity of custom filters:


- name: Check for pending updates
become: true
hosts: all

tasks:
- name: Update cache
apt:
update-cache: yes
changed_when: false

- name: Fetch package list of updates
command: apt list --upgradable
register: aptlist

- set_fact:
updates: "{{ aptlist.stdout_lines | difference(['Listing...'])
| map('regex_replace', '^(.*?)\/(.*)', '\\1') | list }}"

- debug: var=updates

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--
Dick Visser
Trust & Identity Service Operations Manager
GÉANT

[Work-Hard]

Great! Thanks that worked but I had to modify the syntax in the set fact to make it work. 

- name: Check for pending updates
  become: true
  hosts: all

  tasks:
    - name: Update cache
      apt:
        update-cache: yes
      changed_when: false

    - name: Fetch package list of updates
      command: apt list --upgradable
      register: aptlist

    - set_fact:
        updates: "{{ aptlist.stdout_lines | difference(['Listing...'])

| map('regex_replace', '^(.*?)/(.*)', '\\1') | list }}"

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