Get output of command that includes many quotes?

Archives Ansible Project
1

I want to register a variable with my java version. I can get that with:

java -version 2>&1 | head -1 | awk ‘BEGIN { FS = “"” } ; { print $2 }’

That gives me the result I want: 1.8.0_45

But I cannot make this happen in ansible :frowning: I’m going crazy with quotes and escapes. I’ve tried:

  • name: Get java version
    shell: >

java -version 2>&1 | head -1 | awk ‘BEGIN { FS = “"” } ; { print $2 }’
register: java_ver

and:

  • name: Get java version
    command: “{{ item }}”
    with_items:
  • java -version 2>&1 | head -1 | awk ‘BEGIN { FS = “"” } ; { print $2 }’
    register: java_ver

as well as trying various combinations of quotes and escape characters. I just can’t get the right recipe.

2

Because I would rather use jinja2 than piping through a bunch of shell commands:

  • name: Run java -version
    command: java -version
    register: java_version_out
    changed_when: false

  • name: Set java_version var
    set_fact: java_version=“{{ java_version_out.stderr.splitlines()[0]|regex_replace(‘[^\d.]+’, ‘’) }}”

  • debug: var=java_version

3

Nice! However, your regex is also killing the underscore, and I need that. I’m starting to monkey around with this, but I just don’t know jinja, and I bet you’ll have the right magic sauce before I can puzzle it out :slight_smile:

Thanks!

4

You can add the underscore to the list of allowed characters in the regex_replace:

regex_replace(‘[^\d_.]+’, ‘’)