AVN, N, NVM, Pyenv VirtualEnv, Python Setup with macOS 11.1 Big Sur

avn-nvm-setup.md

Setup tips for AVN on Big Sur / macOS 11.1

I found installing AVN, NVM difficult on Big Sur OS 11.1. Here's the steps I took to fix:

1. Install Homebrew

2. Assume you're using zsh. If not, switch to zsh

3. Install nvm

   curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.37.2/install.sh | bash

   1. Make sure the following is added to your ~/.zshrc file

      export NVM_DIR="$HOME/.nvm"
      [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm

   2. Make sure it works:

      exec "$SHELL" # reloads .zshrc, alternatively, restart yout terminal
      nvm --version # should output 0.37.2 or whatever

4. Switch to Node 12 temporarily to finish installation of AVN. For some reason, avn setup fails with Node 14 =(

   nvm install 14.15.0 # you'll need this later
   nvm install 12.13.0
   nvm use 12.13.0
   node -v # should output 12.13.0

5. Install AVN

   npm install -g avn avn-nvm avn-n
   avn setup

   1. Make sure the following is added to your ~.zshrc file

      [[ -s "$HOME/.avn/bin/avn.sh" ]] && source "$HOME/.avn/bin/avn.sh" # load avn

   2. Make sure it works:

      exec "$SHELL" # reloads .zshrc, alternatively, restart yout terminal
      mkdir ./test-avn
      echo "14.15.0" | tee ./test-avn/.nvmrc
      cd ./test-avn
      # expect to see Node 14.15.0 activated by AVN using .nvmrc

Makefile

# change python version as needed 
python_bin = $(wildcard ~/.pyenv/versions/3.6.9/bin/python3.6)
shell_src = $(shell echo *.sh)

.PHONY: shellcheck
shellcheck: ve
	echo $(shell_src) | xargs shellcheck -x

.PHONY: ve
ve:
	virtualenv --python=$(python_bin) .ve
	. .ve/bin/activate && python -m pip install --upgrade pip && pip install -r requirements.txt

.PHONY: run
run: ve	
  # FLASK_APP env variable to auto reload 
	. .ve/bin/activate && IS_TEST=1 IS_DEV=1 FLASK_APP=application.py python3 application.py

pyenv-virtualenv-python-setup.md

Setup tips for Python on Big Sur / macOS 11.1

1. Install Homebrew

2. If you're using mysql, zlib, bzip2...

   brew install bzip2 lbzip2 lzlib zlib
   ## use `brew doctor` if you run into issues
   ## add to .zshrc
   export LDFLAGS="-L/usr/local/opt/zlib/lib -L/usr/local/opt/bzip2/lib"
   export CPPFLAGS="-I/usr/local/opt/zlib/include -I/usr/local/opt/bzip2/include"
   
   brew install mysql     
   brew upgrade openssl
   ## add to .zshrc
   export CPPFLAGS=-I/usr/local/opt/openssl/include
   export LDFLAGS=-L/usr/local/opt/openssl/lib

3. Install pyenv

   brew update
   brew install pyenv
   echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.zshrc # add pyenv to path

4. To Setup Python < 3.8.x

   LDFLAGS="-L/usr/local/opt/bzip2/lib -L/usr/local/opt/zlib/lib -L/usr/local/opt/openssl@1.1/lib" CFLAGS="-I/usr/local/opt/bzip2/include -I/usr/local/opt/zlib/include -I/usr/local/opt/openssl@1.1/include -I$(xcrun --show-sdk-path)/usr/include -Wno-implicit-function-declaration" pyenv install 3.6.9
   
   

5. To Setup Python > 3.8x+

   pyenv virtualenv 3.8.7 my-project
   pyenv activate my-project
   

6. Upgrade pip locally If you are having issues with a specific requirement, you should try this step before installing requirements.

   python -m pip install --upgrade pip # upgrade pip locally
   

7. Unpin any packages in requirements.txt that are causing you problems by removing vesion for the following that likely cause issues:

   grpcio # 1.35+
   grpcio-tools # 1.35+
   pandas
   urllib3
   

8. Try installation again

   pip install -r requirements.txt