I have a Dockerfile to run errbot, looking for a way to script plugin installation. The documentation only seems to list the manual !repos install ... method.
Is there any way for automatic plugin installation from git repo?
Yes, you can simply use the BOT_EXTRA_PLUGIN_DIR config parameter and put any plugins you want to preload there. https://github.com/errbotio/errbot/blob/master/errbot/config-template.py#L85