'itamae docker' fails on remote_file resource when the image is created with non-root user about itamae HOT 2 OPEN

I traced step by step and Intermediate file in image looks root owner as follows:

-rw-r--r-- 1 root root 1350 Aug 31 05:16 /tmp/itamae_tmp/1598851010.8555338/group

at Specinfra::Backend::Docker#docker_run!. This is why chmod root file by USER fails.

Next; why this intermediate file is root:root ?

from itamae.

Now I found out that is why.

1. Specinfra::Backend::Docker#send_file uses Docker::Image#insert_local
2. Docker::Image#insert_local generates Dockerfile ADD command in memory as:
   ADD base dest

Dockerfile ADD command supports --chown as mentioned here, but docker gem looks not used this option so that owner:group become root:root.

from itamae.