Package installation using apt forces file remove/skip in /usr/share/doc/ wich often contains essential files

[ThatOne]

For example
In Dockerfile:
FROM ubuntu:focal
...
RUN apt-get install -y -q apt-utils imx-code-signing-tool
...
In the result container:
# dpkg -L apt-utils
...
/usr/share/doc/apt-utils/examples
/usr/share/doc/apt-utils/examples/apt-ftparchive.conf
/usr/share/doc/apt-utils/examples/ftp-archive.conf
...
But
# ls -lha /usr/share/doc/apt-utils/examples/
total 8.0K
drwxr-xr-x 2 root root 4.0K Jun 15 2021 .
drwxr-xr-x 3 root root 4.0K Dec 24 14:25 ..

# dpkg -L imx-code-signing-tool
...
/usr/share/doc/imx-code-signing-tool
/usr/share/doc/imx-code-signing-tool/CST_UG.pdf.gz
/usr/share/doc/imx-code-signing-tool/HAB4_API.pdf.gz
/usr/share/doc/imx-code-signing-tool/README.csf_parser
/usr/share/doc/imx-code-signing-tool/ahab_signature_block_parser
/usr/share/doc/imx-code-signing-tool/ahab_signature_block_parser/README
/usr/share/doc/imx-code-signing-tool/ahab_signature_block_parser/common.py
/usr/share/doc/imx-code-signing-tool/ahab_signature_block_parser/parse_sig_blk.py
/usr/share/doc/imx-code-signing-tool/changelog.Debian.gz
/usr/share/doc/imx-code-signing-tool/copyright
/usr/share/doc/imx-code-signing-tool/hab_srktool_scripts
/usr/share/doc/imx-code-signing-tool/hab_srktool_scripts/README
/usr/share/doc/imx-code-signing-tool/hab_srktool_scripts/createSRKFuses
/usr/share/doc/imx-code-signing-tool/hab_srktool_scripts/createSRKTable
/usr/share/doc/imx-code-signing-tool/pki_scripts
/usr/share/doc/imx-code-signing-tool/pki_scripts/add_key.sh
/usr/share/doc/imx-code-signing-tool/pki_scripts/ahab_pki_tree.sh
/usr/share/doc/imx-code-signing-tool/pki_scripts/hab4_pki_tree.sh

But
# ls -lha /usr/share/doc/imx-code-signing-tool/pki_scripts/
total 8.0K
drwxr-xr-x 2 root root 4.0K Feb 4 2020 .
drwxr-xr-x 5 root root 4.0K Dec 24 14:25 ..

# ls -lha /usr/share/doc/imx-code-signing-tool/ahab_signature_block_parser/
total 8.0K
drwxr-xr-x 2 root root 4.0K Feb 4 2020 .
drwxr-xr-x 5 root root 4.0K Dec 24 14:25 ..

Reinstallation gives nothing.
How to turn files back???

[Thomas Bechtold (toabctl)]

We try to minimize the content of the container and exclude most of /usr/share/doc . Imo it's a bug in the imx-code-signing-tool package that it installs scripts into /usr/share/doc .

As a workaround, you can remove the exclude and reinstall the package:

# sed -i 's|^path-exclude=/usr/share/doc/*|#path-exclude=/usr/share/doc/*|' /etc/dpkg/dpkg.cfg.d/excludes
# apt install --reinstall imx-code-signing-tool