GUIDE for mac OS X yarn nvm node install

[GUIDE] macos yarn nvm install.md

GUIDE to install yarn, nvm (node) on macOS

last update: Dec 4, 2020

Assumptions:

• macOS >= 10.14 (Mojave); tested with 10.15 (Catalina)
• homebrew properly installed

Prepare before setup (cleanup)

brew uninstall --force yarn node npm  # remove previously installed node, npm, yarn
brew cleanup  # clean all broken symlinks and "waste" (not really required as of homebrew 2019)
brew update  # always good to have the latest

Cleanup previously installed node/npm config

If you used the instructions provided in this gist, then you need to do some more cleanup:

1. in ~/.bashrc:

# remove all the lines below:
export NPM_PACKAGES....
export NODE_PATH....
# and remove all references to these variables later in the file

2. delete ".npmrc": rm -f ~/.npmrc

3. delete all existing installed global npm packages (! but make sure to write down if you're using any of them, to reinstall afterwards)

# !!! DESTRUCTIVE COMMAND, PAY ATTENTION !!!
sudo rm -rf /usr/local/npm_packages   #  !!! MAKE SURE YOU COPY THIS LINE WITH FULL ABSOLUTE PATH COMPLETELY !!!

Install yarn via homebrew

this section was updated Apr 2020

# install Yarn (will install node as a dependency, but that's OK)
brew install yarn

Install nvm

Always consult the latest README (Install section)

Install nvm version 0.37.2 (current: Dec 4 2020)

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

Install node latest lts (fermium, v14.x, current on Oct 2020)

nvm install lts/fermium

Set nvm to use latest LTS as default for new bash sessions

echo "lts/fermium" > .nvmrc #  default to the latest LTS version
nvm alias default lts/fermium

RESTART all terminals => you're done ;-)

IMPORTANT NOTES

NEVER use sudo in any of the commands issued with node, yarn, or npm. If you need global packages installed, just follow nvm guidelines, and do yarn global add <package> or npm install -g <package>.

EXTRA: add fancy bash prompt to show ruby and node versions

...TODO... see .git-prompt-colors.sh

file: .git-prompt-colors.sh

# This theme for gitprompt.sh is designed for dark color schemes
# it is clone of oh-my-zsh crunch theme style with exit status

override_git_prompt_colors() {
  GIT_PROMPT_THEME_NAME="CrunchRC"

  if [ -e ~/.rvm/bin/rvm-prompt ]; then
    RUBY_PROMPT='{$(~/.rvm/bin/rvm-prompt v g)}'
  else
    if command -v rbenv > /dev/null; then
      RUBY_PROMPT='{$(rbenv version | sed -e "s/ (set.*$//")}'
    fi
  fi

  NODE_PROMPT='{$(nvm current)}'

  Time12a="\$(date +%H:%M)"

  GIT_PROMPT_STAGED="${Yellow}● "
  GIT_PROMPT_UNTRACKED="${Cyan}… "
  GIT_PROMPT_STASHED="${BoldMagenta}⚑ "
  GIT_PROMPT_CLEAN="${Green}✔ "
  GIT_PROMPT_COMMAND_OK="${Green}✔ "
  GIT_PROMPT_COMMAND_FAIL="${Red}✘ "

  KERNEL_PROMPT='‹$(uname -r)›'

  GIT_PROMPT_START_USER="${Magenta}rvm:${RUBY_PROMPT}; nvm:${NODE_PROMPT}\n_LAST_COMMAND_INDICATOR_${Cyan}${PathShort}${White}:"
  GIT_PROMPT_START_ROOT="${GIT_PROMPT_START_USER}"
  GIT_PROMPT_END_USER="${BoldBlue} ➭ ${ResetColor}"
  GIT_PROMPT_END_ROOT="${BoldRed} # ${ResetColor}"
  GIT_PROMPT_LEADING_SPACE=0
  GIT_PROMPT_PREFIX="${Green}["
  GIT_PROMPT_SUFFIX="${Green}]"
  GIT_PROMPT_SYMBOLS_NO_REMOTE_TRACKING="✭"
}

reload_git_prompt_colors "CrunchCustom"

Hi,
I followed the steps above, but it showed "nvm: command not found" after I reopened the terminal and run "nvm --version"
Do you know what might be going wrong?
Thanks!

I followed the steps above, but it showed "nvm: command not found" after I reopened the terminal and run "nvm --version"

@AlphaZach are you using bash or zsh as your default interpreter? See the comments above about bash and zsh

@AlphaZach I didn't follow all these steps specifically, and I'm using the default zsh in BigSur. I had to create a ~/.zshrc file and add these lines:

export NVM_DIR=~/.nvm
source $(brew --prefix nvm)/nvm.sh

Save and exit the file.

After that, I had to run this in a terminal:

source ~/.zshrc

Restart your terminal and it should now be available. (restart may not be required, I'm new to mac)