dotfiles/install

#!/usr/bin/env bash

set -o errexit
set -o pipefail
set -o nounset

export DEBIAN_FRONTEND=noninteractive

INSTALL_DIR=${HOME}/.cfg
OH_MY_ZSH_DIR=${HOME}/.oh-my-zsh
ZSH_CUSTOM=${OH_MY_ZSH_DIR}/custom
LOCAL_BIN_DIR=${HOME}/.local/bin

config () {
    /usr/bin/git --git-dir=${INSTALL_DIR}/ --work-tree=${HOME} $@
}

install_bare_dotfiles () {
  git clone --bare https://github.com/joshuadavidthomas/dotfiles.git ${INSTALL_DIR}
  mkdir -p .config-backup
  config checkout 2>&1
  if [ $? = 0 ]; then
    echo "Checked out config.";
  else
    echo "Backing up pre-existing dot files.";
    config checkout 2>&1 | egrep "\s+\." | awk {'print $1'} | xargs -I{} mv {} .config-backup/{}
  fi;
  config checkout
  config config status.showUntrackedFiles no
}

update_bare_dotfiles () {
  config pull
}

[[ -d ${LOCAL_BIN_DIR} ]] || mkdir -p ${LOCAL_BIN_DIR}

set_kernal_and_machine_env_var () {
    KERNAL=$(uname -s | tr "[:upper:]" "[:lower:]")
    case "$(uname -m)" in
    x86_64)
        MACHINE=amd64
        ;;
      i686 | i386)
        MACHINE=386
        ;;
      aarch64)
        MACHINE=arm64
        ;;
      *)
        echo "Machine $(uname -m) not supported by the installer.\n" \
          "Go to https://direnv for alternate installation methods."
        exit 1
        ;;
    esac
}

install_zsh () {
  if [[ ! -x $(command -v zsh) ]]; then
    echo "Installing zsh"
    sudo apt install zsh
  fi
}

install_oh_my_zsh () {
    if [[ ! -d $OH_MY_ZSH_DIR ]]; then
      echo "Cloning oh-my-zsh in to ${OH_MY_ZSH_DIR}"
      umask g-w,o-w
      git clone -c core.eol=lf -c core.autocrlf=false \
        -c fsck.zeroPaddedFilemode=ignore \
        -c fetch.fsck.zeroPaddedFilemode=ignore \
        -c receive.fsck.zeroPaddedFilemode=ignore \
        --depth=1 --branch master https://github.com/ohmyzsh/ohmyzsh ${OH_MY_ZSH_DIR}
    else
      echo "Updating oh-my-zsh"
      cd ${OH_MY_ZSH_DIR}
      git pull
    fi
}

install_tmux_plugin_manager () {
    [[ -d "${HOME}/.tmux/plugins/tpm" ]] || git clone https://github.com/tmux-plugins/tpm ~/.tmux/plugins/tpm
}


install_starship () {
    if ! [ -x "$(command -v starship)" ]; then
        sh -c "$(curl -fsSL https://starship.rs/install.sh)" -- --force --bin-dir ${LOCAL_BIN_DIR}
    fi
}

install_direnv () {
    if ! [ -x "$(command -v direnv)" ]; then
        set_kernal_and_machine_env_var
        download_url=$(
            curl -fL https://api.github.com/repos/direnv/direnv/releases/latest \
            | grep browser_download_url \
            | cut -d '"' -f 4 \
            | grep "direnv.$KERNAL.$MACHINE"
          )
        curl -o "${LOCAL_BIN_DIR}/direnv" -fL "$download_url"
        chmod +x "${LOCAL_BIN_DIR}/direnv"
    fi
}

install_just () {
  if ! [ -x "$(command -v just)" ]; then
      curl --proto '=https' --tlsv1.2 -sSf https://just.systems/install.sh | bash -s -- --force --to ${LOCAL_BIN_DIR}
  fi
}

install_fzf () {
    [[ -d ${HOME}/.fzf ]] || git clone --depth 1 https://github.com/junegunn/fzf.git ~/.fzf && ~/.fzf/install --key-bindings --completion --update-rc --no-bash
}

install_gh_cli () {
    if ! [ -x "$(command -v gh)" ]; then
        set_kernal_and_machine_env_var
        version=`curl  "https://api.github.com/repos/cli/cli/releases/latest" | grep '"tag_name"' | sed -E 's/.*"([^"]+)".*/\1/' | cut -c2-`
        curl -sSL https://github.com/cli/cli/releases/download/v${version}/gh_${version}_${KERNAL}_${MACHINE}.tar.gz -o gh_${version}_${KERNAL}_${MACHINE}.tar.gz
        tar xvf gh_${version}_${KERNAL}_${MACHINE}.tar.gz
        mv gh_${version}_${KERNAL}_${MACHINE}/bin/gh ${LOCAL_BIN_DIR}/gh
        sudo mv gh_${version}_${KERNAL}_${MACHINE}/share/man/man1/* /usr/share/man/man1/
        chmod +x "${LOCAL_BIN_DIR}/gh"
    fi
}

if [[ ! -d ${INSTALL_DIR} ]]; then
  install_bare_dotfiles
else
  update_bare_dotfiles
fi

install_zsh
install_oh_my_zsh
install_tmux_plugin_manager
install_starship
install_direnv
install_just
install_fzf
install_gh_cli