gistfile1.txt

# AWX 'setup-synapse' Templating Bug

AWX versions:
- Python 3.6.8
- ansible 2.9.14
- AWX 15.0.1

Here is the vars settings i am using that are related:
```
# Synapse Settings
matrix_synapse_auto_join_rooms: ['#announcements:cheesedomain.xyz', '#main:cheesedomain.xyz']
# Synapse Extension
matrix_synapse_configuration_extension_yaml: |
  autocreate_auto_join_rooms: true
```

When i run the playbook with 'setup-all,start' tags it completes without error. (But also doesn't apply these settings!)

But when i try running it with 'setup-synapse,start' i get this error:
```
TASK [matrix-synapse : Ensure Synapse homeserver config installed] *************
{
    "msg": "An unhandled exception occurred while templating '{{ matrix_synapse_configuration_yaml|from_yaml|combine(matrix_synapse_configuration_extension, recursive=True) }}'. Error was a <class 'yaml.scanner.ScannerError'>, original message: while scanning a simple key\n  in \"<unicode string>\", line 1221, column 1:\n    '#announcements:cheesedomain.xyz ... \n    ^\ncould not find expected ':'\n  in \"<unicode string>\", line 1238, column 1:\n    autocreate_auto_join_rooms: true\n    ^",
    "_ansible_no_log": false
}
```

Strangely I cannot replicate the bug outside of AWX, I tried running it locally using these versions:
- ansible 2.9.14
- Python 3.7.3


The guilty playbook task:
```
- name: Ensure Synapse homeserver config installed
  copy:
    content: "{{ matrix_synapse_configuration|to_nice_yaml }}"
    dest: "{{ matrix_synapse_config_dir_path }}/homeserver.yaml"
    mode: 0644
    owner: "{{ matrix_user_username }}"
    group: "{{ matrix_user_groupname }}"
```

What to try?
- Different version of python3 on the AWX side?
- Double quotes instead of single? No quotes?