install.sh

#!/bin/sh

find_latest_ruby_version() {
  help_find_latest_version "rbenv"
}

find_latest_python_version() {
  help_find_latest_version "pyenv"
}

help_find_latest_version() {
  $1 install -l | sed -e 's/^ *//' | grep '^\d\.\d\.\d$' | tail -1
}

append_to_zshrc() {
  local text="$1" zshrc
  local skip_new_line="${2:-0}"

  if [ -w "$HOME/.zshrc.local" ]; then
    zshrc="$HOME/.zshrc.local"
  else
    zshrc="$HOME/.zshrc"
  fi

  if ! grep -Fqs "$text" "$zshrc"; then
    if [ "$skip_new_line" -eq 1 ]; then
      printf "%s\n" "$text" >> "$zshrc"
    else
      printf "\n%s\n" "$text" >> "$zshrc"
    fi
  fi
}

gem_install_or_update() {
  if gem list "$1" --installed > /dev/null; then
    gem update "$@"
  else
    gem install "$@"
    rbenv rehash
  fi
}

# Changes shell to Zsh
change_to_zsh() {
  local shell_path;
  shell_path="$(which zsh)"

  fancy_echo "Changing to zsh..."

  if ! grep "$shell_path" /etc/shells > /dev/null 2>&1 ; then
    fancy_echo "Adding '$shell_path' to /etc/shells"
    sudo sh -c "echo $shell_path >> /etc/shells"
  fi

  sudo chsh -s "$shell_path" "$USER"
}

fancy_echo() {
  echo "\033[0;32m$@\033[0m"
}

# Install Homebrew
if ! command -v brew >/dev/null; then
  fancy_echo "Installing Homebrew ..."

  /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
  
  export PATH="/usr/local/bin:$PATH"
fi

# Creates a phony Homebrew bundle file and installs packages
brew bundle --file=- <<EOF
tap "homebrew/services"
tap "caskroom/cask"
brew "openssl"
brew "git"
brew "the_silver_searcher"        # Source-code searcher
brew "tmux"                       # Terminal multiplexer
brew "reattach-to-user-namespace" # Fixes potential tmux issues specific to macOS
brew "vim"
brew "zsh"
brew "mitmproxy"                  # Local proxy server to inspect network traffic
brew "rbenv"                      # Ruby version manager
brew "ruby-build"
brew "pyenv"                      # Python version  manager
EOF

# Ruby
latest_ruby_version="$(find_latest_ruby_version)"
append_to_zshrc 'eval "$(rbenv init - --no-rehash)"' 1
eval "$(rbenv init -)"

# Python
latest_python_version="$(find_latest_python_version)"
append_to_zshrc 'eval "$(pyenv init - --no-rehash)"' 1
eval "$(pyenv init -)"

pyenv global "$latest_python_version"
pyenv shell "$latest_python_version"

if ! rbenv versions | grep -Fq "$latest_ruby_version"; then
  RUBY_CONFIGURE_OPTS=--with-openssl-dir=/usr/local/opt/openssl rbenv install -s "$latest_ruby_version"
fi

rbenv global "$latest_ruby_version"
rbenv shell "$latest_ruby_version"
gem update --system

mkdir "$HOME/.mitmproxy"
mkdir "$HOME/.mitmproxy/scripts"