我正在下载一个非常大的视频文件，它的下载百分比正在通过其他工具存储在DL_PERCENTAGE文件中。现在，我尝试将剧本保留到循环播放，直到完成60％的下载，同时我需要在终端中打印当前的下载百分比。
这是剧本，我尝试在执行过程中打印下载百分比，但始终打印为零。它从未显示过文件DL_PERCENTAGE的升级值？
cat test.yml
---
- hosts: localhost
tasks:
- name: set initial value of progress percentage to zero
set_fact:
percentage: 0
- name: download percentage is {{ percentage | default("0") }}
shell: cat DL_PERCENTAGE
register: percentage
until: percentage.stdout >= 60
retries: 5
delay: 10
当前输出：
>ansible-playbook test.yml
PLAY [localhost] *************************************************************************************************************************************************************************************************************************
TASK [Gathering Facts] *******************************************************************************************************************************************************************************************************************
ok: [localhost]
TASK [set initial value of progress percentage to zero] **********************************************************************************************************************************************************************************
ok: [localhost]
TASK [download percentage is 0] *********************************************************************************************************************************************************************************************************
FAILED - RETRYING: download percentage is 0 (5 retries left).
FAILED - RETRYING: download percentage is 0 (4 retries left).
FAILED - RETRYING: download percentage is 0 (3 retries left).
FAILED - RETRYING: download percentage is 0 (2 retries left).
FAILED - RETRYING: download percentage is 0 (1 retries left).
基于DL_PERCENTAGE文件的更新内容，我试图获得以下输出：
>ansible-playbook test.yml
PLAY [localhost] *************************************************************************************************************************************************************************************************************************
TASK [Gathering Facts] *******************************************************************************************************************************************************************************************************************
ok: [localhost]
TASK [set initial value of progress percentage to zero] **********************************************************************************************************************************************************************************
ok: [localhost]
TASK [download percentage is 0] *********************************************************************************************************************************************************************************************************
FAILED - RETRYING: download percentage is 0 (5 retries left).
FAILED - RETRYING: download percentage is 23 (4 retries left).
FAILED - RETRYING: download percentage is 45 (3 retries left).
FAILED - RETRYING: download percentage is 49 (2 retries left).
FAILED - RETRYING: download percentage is 53(1 retries left).
以下是显示文件内容随时间变化的示例：
cat DL_PERCENTAGE
0
sleep 5;
cat DL_PERCENTAGE
11
sleep 5;
cat DL_PERCENTAGE
21