Ansible:将命令参数作为列表传递 [英] Ansible: Pass command arguments as a list
问题描述
我想将多个参数作为列表存储在一个变量中.
I want to store multiple arguments in a variable as a list.
vars:
my_args:
- --verbose
- --quiet
- --verify
然后将列表作为带引号的参数传递给命令.最明显的join
过滤器没有按我预期的那样工作.它生成一个包含所有列表元素的单词,而不是每个列表元素一个单词:
Then pass the list as quoted arguments to a command. The most obvious join
filter doesn't work as I expected. It produces a single word containing all list elements as opposed to one word per list element:
tasks:
- command: printf '%s\n' "{{ my_args | join(' ') }}"
...
changed: [localhost] => {
"changed": true,
"cmd": [
"printf",
"%s\\n",
" --quiet --verbose --verify "
],
STDOUT:
--quiet --verbose --verify
如何将它们传递给命令?
How to pass them to a command?
推荐答案
要将列表元素作为参数传递给模块,请使用 map('quote') |join(' ')
过滤器或 for
循环:
To pass a list elements as arguments to a module use either map('quote') | join(' ')
filters or the for
loop:
tasks:
- name: Pass a list as arguments to a command using filters
command: executable {{ my_args | map('quote') | join(' ') }}
- name: Pass a list as arguments to a command using for loop
command: executable {% for arg in my_args %} "{{ arg }}" {% endfor %}
不要将引号与过滤器一起使用,而要将它们与循环一起使用.尽管略长,for
循环提供了更多的输出整形可能性.例如,为列表项添加前缀或后缀,如 "prefix {{ item }} suffix"
,或对项目应用过滤器,甚至使用 loop.*
变量.
Do not use quotes with filter, but do use them with a loop. Although being slightly longer, the for
loop gives more possibilities of shaping the output. For example prefixing or suffixing the list item like "prefix {{ item }} suffix"
, or applying filters to the item or even selectively processing items using loop.*
variables.
有问题的例子是:
tasks:
- command: printf '%s\n' {{ my_args | map('quote') | join(' ') }}
- command: printf '%s\n' {% for arg in my_args %} "{{ arg }}" {% endfor %}
...
changed: [localhost] => {
"changed": true,
"cmd": [
"printf",
"%s\\n",
"--quiet",
"--verbose",
"--verify"
],
STDOUT:
--quiet
--verbose
--verify
列表元素不限于简单的字符串,还可以包含一些逻辑:
List elements are not limited to simple strings and can contain some logic:
vars:
my_args:
- --dir={{ my_dir }}
- {% if my_option is defined %} --option={{ my_option }} {% endif %}
这篇关于Ansible:将命令参数作为列表传递的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!