Version manage all the things

Recently I’ve re-installed Nodejs, python, and Ruby on my work machine.
When installing Ruby via Homebrew I was having trouble using it after
installation, then my collegue figured out that brew info ruby outputs
this message:

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By default, binaries installed by gem will be placed into:
  /usr/local/lib/ruby/gems/2.6.0/bin
You may want to add this to your PATH.
ruby is keg-only, which means it was not symlinked into /usr/local,
because macOS already provides this software and installing another version in
parallel can cause all kinds of trouble.
If you need to have ruby first in your PATH run:
  echo 'export PATH="/usr/local/opt/ruby/bin:$PATH"' >> ~/.zshrc
For compilers to find ruby you may need to set:
  export LDFLAGS="-L/usr/local/opt/ruby/lib"
  export CPPFLAGS="-I/usr/local/opt/ruby/include"

At this point I think it’s probably just better avoid installing Ruby via
homebrew. I searched a bit and decided to go with version managers like nvm.

This article is a quick note on what I ended up using for each language
and how did I installed them.

Ruby

rbenv https://github.com/rbenv/rbenv.git

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$ git clone https://github.com/rbenv/rbenv.git ~/.rbenv
# use a stable release instead of master
$ cd ~/.rbenv
$ git checkout {version_tag}
# install ruby-build which is required for installing anything
$ mkdir -p "$(rbenv root)"/plugins
$ git clone https://github.com/rbenv/ruby-build.git "$(rbenv root)"/plugins/ruby-build
$ cd "$(rbenv root)"/plugins/ruby-build
# use a stable release instead of master
$ git checkout {version_tag}
# update .bashrc, or manually edit your ~/.bashrc, ~/.bash_profile
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile
# install ruby and gem
rbenv install 2.6.3
# use this version globally
rbenv global 2.6.3
# install desired gem packages
gem install sass
gem install compass

I’d like to make my .bashrc more portable so I added some
checks to see if rbenv is installed before executing rbenv init:

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# http://stackoverflow.com/questions/592620/check-if-a-program-exists-from-a-bash-script/3931779#3931779
command_exists () {
    type "$1" &> /dev/null ;
}
if [ -d "$HOME/.rbenv/" ]; then
  export PATH="$HOME/.rbenv/bin:$PATH"
  if command_exists rbenv; then
    eval "$(rbenv init -)"
  fi
fi

python

pyenv https://github.com/pyenv/pyenv

The step is pretty much similar to rbenv in general

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$ git clone https://github.com/pyenv/pyenv.git ~/.pyenv
# use a stable release instead of master
$ cd ~/.pyenv
$ git checkout {version_tag}
# update .bashrc, or manually edit your ~/.bashrc, ~/.bash_profile
echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bash_profile
echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bash_profile
# install ruby and gem
pyenv install 3.7.3
# use this version globally
pyenv global 3.7.3
# install desired pip packages
pip install pipenv

Similarly, I also added some checks before doing pyenv init, so that
it won’t break if I’m in an environment without pyenv:

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if [ -d "$HOME/.pyenv/" ]; then
  export PYENV_ROOT="$HOME/.pyenv"
  export PATH="$PYENV_ROOT/bin:$PATH"
  if command_exists pyenv; then
    eval "$(pyenv init -)"
  fi
fi

Node.js

nvm https://github.com/nvm-sh/nvm

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$ git clone https://github.com/nvm-sh/nvm.git ~/.nvm
# use a stable release instead of master
$ cd ~/.nvm
$ git checkout {version_tag}
# update .bashrc, or manually edit your ~/.bashrc, ~/.bash_profile
export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion
# install latest nodejs v10 stable
$ nvm install 10
$ nvm use 10
# set default version to v10
$ nvm alias default 10
# install npm packages
$ npm install

Again, making .bashrc more general by checking file existence beforehand:

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

  • Note: to use nvm in fish shell, install fisher
    and do fisher add FabioAntunes/fish-nvm

Comments

2019-07-29
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