pass empty string as variable value from ansible playbook to powershell?

Question

I want to pass an empty string as a variable value from ansible-playbook to PowerShell file.

Ansible Code:

vars:
 name: {{file_name}}

tasks:
  - name: run ps1 
    win_shell: "script.ps1 -database_name {{ name }}"
    no_log: false

Powershell code 

param(

[Parameter(Mandatory = $true)][AllowEmptyString()][string]$database_name 

)

So if there is no name in file_name then I want to send an empty string to PowerShell file! How can I do that?

Please edit your question and fix the formatting. As for your question, what steps have you tried so far that are not working for you? — mdaniel
– mdaniel, Commented Jun 2, 2020 at 4:45
Hi @mdaniel thanks. I want to pass an empty string as a variable ( like name = " ") to PowerShell file if there is no filename declared or not define. I tried with win_shell: "script.ps1 -database_name {{ name | default ( ' ' ) }}. but its not working — Herry
– Herry, Commented Jun 2, 2020 at 12:20

mdaniel · Accepted Answer · 2020-06-02 16:04:03Z

2

Likely you need | quote as in {{ name | default("") | quote }} in order to wrap the result in shell quote variables. Without that, jinja2 does not know that you want the empty string to render as "" instead of blank; you can also side-step that with {{ name | default('""') }} but that's highly unlikely to be what you want since if name is "hello world" then {{ name | default("") }} will render in your command as -database_name hello world which will almost certainly fail

answered Jun 2, 2020 at 16:04

mdaniel

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