install

#!/bin/bash

set -eu

REPOSITORY_URL=git@github.com:majkelcc/chang.git
DEFAULT_CHANG_HOME=${CHANG_HOME:-~/.chang}

echo -n "Install chang to (defaults to ${DEFAULT_CHANG_HOME/$HOME/~}): "
read chang_home

eval chang_home="${chang_home%/}" # use eval to expand ~ if present
chang_home="${chang_home:-${DEFAULT_CHANG_HOME}}"

if [[ -d "$chang_home" ]]; then
  echo "Directory ${chang_home} exists, skipping"
else
  mkdir -p "$chang_home"
  git clone $REPOSITORY_URL "$chang_home"
fi

if [[ -z ${CHANG_HOME:-} ]]; then
  bashrc=
  if [[ -f ~/.bash_profile ]]; then
    bashrc=~/.bash_profile
  elif [[ -f ~/.bashrc ]]; then
    bashrc=~/.bashrc
  fi

  if [[ -n $bashrc ]]; then
    echo -n "Install chang in ${bashrc/$HOME/~}? (Y/n): "
    read y
    if [[ -z $y || $y == "y" ]]; then
      echo
      echo "Installing chang in ${bashrc/$HOME/~}"
      cat <<EOF | tee -a "$bashrc"

export CHANG_HOME=${chang_home/$HOME/~}
export PATH="\$CHANG_HOME/bin:\$PATH"
source \$CHANG_HOME/chang-bash-completion

EOF
    fi
  fi

  zshrc=
  if [[ -f ~/.zshrc ]]; then
    zshrc=~/.zshrc
  fi

  if [[ -n $zshrc ]]; then
    echo -n "Install chang in ${zshrc/$HOME/~}? (Y/n): "
    read y
    if [[ -z $y || $y == "y" ]]; then
      echo
      echo "Installing chang in ${zshrc/$HOME/~}"
      cat <<EOF | tee -a "$zshrc"

export CHANG_HOME=${chang_home/$HOME/~}
export PATH="\$CHANG_HOME/bin:\$PATH"
source \$CHANG_HOME/chang-zsh-completion

EOF
    fi
  fi
fi

echo
echo "Chang installed 🐳"
echo "(open a new shell to use it)"