General questions - git archive a .j2 file with keyword expansion in the header section

Hello Devs,

Got a question on using git keyword expansion on a .j2 template file. Keyword expansion does not seem to work with .j2 file. Please see below a snippet of my attempt to archive test.cfg.j2 containing git keyword expansions in the header. It works if I changes the .j2 file extension to something else, say .yaml. I have not been able to find any information about issue. Can you please review and advise? Thank you.


[root@da ~]# cat Ansible_Playbooks/Day0/roles/hpe-bm-kickstart/templates/test.cfg.j2 
##############################################################################
# Author : $Format: %an <%ae>$
# Commit : $Format: %h$
# Date   : $Format: %cs$
#
##############################################################################

[root@da ~]# git archive --format=tgz HEAD --output=test.tar.gz Ansible_Playbooks/Day0/roles/hpe-bm-kickstart/templates/test.cfg.j2
[root@da ~]# tar -xf test.tar.gz  --directory test
[root@da ~]# cat test
test/        test.tar.gz  
[root@da ~]# cat test
test/        test.tar.gz  
[root@da ~]# cat test/Ansible_Playbooks/Day0/roles/hpe-bm-kickstart/templates/test.cfg.j2 
##############################################################################
# Author : $Format: %an <%ae>$
# Commit : $Format: %h$
# Date   : $Format: %cs$
#
##############################################################################

[root@da ~]#



Regards,
Nathan Lin
Solutions Engineer
Global Sales Engineering (GSE)
https://hpe.com/info/askgse (Internal site)
+1 (281) 204-4077 Office

Houston, TX
hpe.com