docker-compose build failed on git-nbdiffdriver

[rpranata]

Reproduction Step

1. A clean environment
2. Follow the steps to prepare the handson-ml2 image from the docker setup readme

Expected

The handson-ml2 docker image is created

Actual

Failed when building due to an attempt to import from gitdb.util.compat module.

Step 15/18 : RUN git-nbdiffdriver config --enable --global
 ---> Running in d15cbb46ac68
Traceback (most recent call last):
  File "/opt/conda/envs/tf2/bin/git-nbdiffdriver", line 7, in <module>
    from nbdime.vcs.git.diffdriver import main
  File "/opt/conda/envs/tf2/lib/python3.7/site-packages/nbdime/vcs/git/diffdriver.py", line 26, in <module>
    from nbdime.args import (
  File "/opt/conda/envs/tf2/lib/python3.7/site-packages/nbdime/args.py", line 18, in <module>
    from .gitfiles import is_gitref
  File "/opt/conda/envs/tf2/lib/python3.7/site-packages/nbdime/gitfiles.py", line 11, in <module>
    from git import (
  File "/opt/conda/envs/tf2/lib/python3.7/site-packages/git/__init__.py", line 38, in <module>
    from git.exc import *                       # @NoMove @IgnorePep8
  File "/opt/conda/envs/tf2/lib/python3.7/site-packages/git/exc.py", line 9, in <module>
    from git.compat import UnicodeMixin, safe_decode, string_types
  File "/opt/conda/envs/tf2/lib/python3.7/site-packages/git/compat.py", line 16, in <module>
    from gitdb.utils.compat import (
ModuleNotFoundError: No module named 'gitdb.utils.compat'
ERROR: Service 'handson-ml2' failed to build: The command '/bin/sh -c git-nbdiffdriver config --enable --global' returned a non-zero code: 1

Further investigation led me to believe that the compat module has been removed in gitdb version 3.0.2.

The gitdb is a resolved dependency chain as below

• handson-ml2
• nbdime
• GitPython

[Harmon758]

See gitpython-developers/GitPython#983.

[rpranata]

Thank you @Harmon758.

It works after I explicitly added GitPython dependency with the latest version into the environment.yml