Summary

The Makefile uses bash-isms but doesn't explicitly ask for bash.

In Ubuntu, you get a POSIX compatible shell that doesn't know about eg [[

Steps to reproduce

1. make setup

Expected behavior:

make setup works.

Actual behavior:

You get an error that says [[: not found.

Is this a regression?

Sorry, I haven't use streamlit in the past. The git history says that [[ was introduced into the Makefile at 62588bf.

Debug info

• Streamlit version: develop
• Python version: Python 3.7.4
• OS version: Latest Ubuntu from docker hub
• Browser version: Didn't install a browser.