install.sh

#!/bin/bash

function check_prereqs {

    if [[ "$DARWIN" == "1" ]] && [[ -n "$(which brew)" ]]; then
        brew install git bash-completion vim tmux ripgrep
        return
    fi

    if [[ -n "$(which apt)" ]] && [[ "$(sudo -n echo hello 2>/dev/null)" == "hello" ]]; then
        sudo apt update && sudo apt install -y git bash-completion vim tmux ripgrep
        return
    fi
}

function create_if_not_exist {
    FILE="$1"
    if [[ ! -f "$FILE" ]]; then
        echo -e "Creating $FILE"
        touch "$FILE"
    fi
}

function add_line_if_not_present {
    FILE="$1"
    LINE="$2"

    if ! grep -q "$LINE" "$FILE"; then
        echo "$LINE" >>"$FILE"
    fi
}

function install_gitconfig {
    git config --global include.path "$DOTFILE_DIR/git/gitconfig.ini"
    if [[ -n "$GITHUB_REPOSITORY" ]] && [[ ! $GITHUB_REPOSITORY == github/* ]]; then
        echo "Detected that you are not working on a github.com repository."
        git config --global user.email "mitchell.rysavy@gmail.com"
    fi
}

function install_bashrc {
    BASHRC_FILE="$HOME/.bashrc"
    BASHPROFILE_FILE="$HOME/.bash_profile"

    if [[ "$DARWIN" == "1" ]]; then
        # On Mac: add all sourced files to .bash_profile
        create_if_not_exist "$BASHPROFILE_FILE"
        add_line_if_not_present "$BASHPROFILE_FILE" "export DOTFILE_DIR=$DOTFILE_DIR"
        add_line_if_not_present "$BASHPROFILE_FILE" "source \"\$DOTFILE_DIR/bash/bashrc.sh\""
    else
        create_if_not_exist "$BASHRC_FILE"
        add_line_if_not_present "$BASHRC_FILE" "export DOTFILE_DIR=$DOTFILE_DIR"
        add_line_if_not_present "$BASHRC_FILE" "source \"\$DOTFILE_DIR/bash/bashrc.sh\""       
    fi

}

function install_tmuxconf {
    if [[ -z "$(which tmux)" ]]; then
        echo -e "tmux is not found."
        return
    fi

    TMUXRC_FILE="$HOME/.tmux.conf"
    TMUXRC_SRC_LINE="source-file \"\$DOTFILE_DIR/tmux/tmux.conf\""

    create_if_not_exist "$TMUXRC_FILE"
    add_line_if_not_present "$TMUXRC_FILE" "$TMUXRC_SRC_LINE"
}

function install_vimrc {
    if [[ -z "$(which vim)" ]]; then
        echo -e "vim is not found."
        return
    fi

    VIMRC_FILE="$HOME/.vimrc"
    VIM_SRC_LINE="so $DOTFILE_DIR/vim/vim.vim"
    VIMRC_SRC_LINE="so $DOTFILE_DIR/vim/vimrc.vim"

    create_if_not_exist "$VIMRC_FILE"
    add_line_if_not_present "$VIMRC_FILE" "$VIM_SRC_LINE"
    add_line_if_not_present "$VIMRC_FILE" "$VIMRC_SRC_LINE"

    curl -fLo "$HOME/.vim/autoload/plug.vim" --create-dirs https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
}

function install_neovimrc {
    if [[ -z "$(which nvim)" ]]; then
        echo -e "neovim is not found."
        return
    fi

    NVIM_CFG="$HOME/.config/nvim"
    mkdir -p "$NVIM_CFG/plugged/"
    
    PLUG_DIR="${XDG_DATA_HOME:-$HOME/.local/share}/nvim/site/autoload/plug.vim"
    
    VIMRC_FILE="$NVIM_CFG/init.vim"
    NVIM_SRC_LINE="so $DOTFILE_DIR/vim/neovim.vim"
    VIMRC_SRC_LINE="so $DOTFILE_DIR/vim/vimrc.vim"

    curl -fLo "$PLUG_DIR" --create-dirs https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim

    create_if_not_exist "$VIMRC_FILE"
    add_line_if_not_present "$VIMRC_FILE" "$NVIM_SRC_LINE"
    add_line_if_not_present "$VIMRC_FILE" "$VIMRC_SRC_LINE"
}

# As always, props to
# https://stackoverflow.com/questions/59895/how-can-i-get-the-source-directory-of-a-bash-script-from-within-the-script-itsel
export DOTFILE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd)"

echo -e "We appear to be running from $DOTFILE_DIR..."

if [[ "$OSTYPE" == "darwin"* ]]; then
    echo -e "Mac detected!"
    DARWIN=1
else
    DARWIN=0
fi

if [[ "$CODESPACES" == "true" ]]; then
    echo -e "Codespaces detected!"
fi

check_prereqs

install_bashrc
install_tmuxconf
install_vimrc
install_neovimrc
install_gitconfig