install.sh

#!/usr/bin/env sh
set -eu

repository="${WAVE_NVIM_REPOSITORY:-https://github.com/wavefnd/nvim-wave.git}"
app_name="${NVIM_APPNAME:-nvim}"
config_home="${XDG_CONFIG_HOME:-${HOME}/.config}"
data_home="${XDG_DATA_HOME:-${HOME}/.local/share}"
config_dir="${config_home}/${app_name}"
native_target="${data_home}/${app_name}/site/pack/wave/start/nvim-wave"
install_lsp=0
install_mode=auto
target=""

for argument in "$@"; do
  case "${argument}" in
    --with-lsp)
      install_lsp=1
      ;;
    --lazy)
      install_mode=lazy
      ;;
    --native)
      install_mode=native
      ;;
    --help|-h)
      printf '%s\n' "usage: install.sh [--lazy|--native] [--with-lsp] [target]"
      exit 0
      ;;
    *)
      if [ -z "${target}" ]; then
        target=${argument}
      else
        printf '%s\n' "usage: install.sh [--lazy|--native] [--with-lsp] [target]" >&2
        exit 2
      fi
      ;;
  esac
done

if [ -n "${target}" ]; then
  if [ "${install_mode}" = "lazy" ]; then
    printf '%s\n' "error: an explicit target cannot be combined with --lazy" >&2
    exit 2
  fi
  install_mode=native
  native_target=${target}
fi

if [ "${install_mode}" = "auto" ]; then
  if [ -f "${config_dir}/lazy-lock.json" ] || [ -f "${config_dir}/lua/config/lazy.lua" ]; then
    install_mode=lazy
  else
    install_mode=native
  fi
fi

if ! command -v git >/dev/null 2>&1; then
  printf '%s\n' "error: git is required" >&2
  exit 1
fi

if [ "${install_mode}" = "lazy" ]; then
  plugin_dir="${config_dir}/lua/plugins"
  plugin_spec="${plugin_dir}/wave.lua"
  if [ -f "${plugin_spec}" ]; then
    if grep -Fq "wavefnd/nvim-wave" "${plugin_spec}"; then
      printf '%s\n' "LazyVim configuration already exists at ${plugin_spec}"
    else
      printf '%s\n' "error: ${plugin_spec} already exists and was not created for wave.nvim" >&2
      exit 1
    fi
  else
    mkdir -p "${plugin_dir}"
    printf '%s\n' \
      'return {' \
      '  {' \
      '    "wavefnd/nvim-wave",' \
      '    event = { "BufReadPre *.wave", "BufNewFile *.wave" },' \
      '    opts = {},' \
      '  },' \
      '}' > "${plugin_spec}"
    printf '%s\n' "Created LazyVim configuration at ${plugin_spec}"
  fi
  if [ -d "${native_target}/.git" ]; then
    printf '%s\n' "note: ${native_target} is a previous native install; LazyVim does not load it."
  fi
  printf '%s\n' "wave.nvim will be installed by lazy.nvim on the next Neovim start."
else
  if [ -d "${native_target}/.git" ]; then
    printf '%s\n' "Updating wave.nvim in ${native_target}"
    git -C "${native_target}" pull --ff-only
  elif [ -e "${native_target}" ]; then
    printf '%s\n' "error: ${native_target} exists but is not a Git checkout" >&2
    exit 1
  else
    printf '%s\n' "Installing wave.nvim into ${native_target}"
    git clone "${repository}" "${native_target}"
  fi
  printf '%s\n' "wave.nvim native package is installed."
fi

if [ "${install_lsp}" -eq 1 ] && ! command -v wave-agape >/dev/null 2>&1; then
  if ! command -v cargo >/dev/null 2>&1; then
    printf '%s\n' "error: cargo is required to install wave-agape" >&2
    exit 1
  fi
  printf '%s\n' "Installing wave-agape with Cargo"
  cargo install --git https://github.com/wavefnd/wave-agape --tag v0.3.0 --locked
elif ! command -v wave-agape >/dev/null 2>&1; then
  printf '%s\n' "note: wave-agape is not on PATH; install it for LSP features."
fi

printf '%s\n' "Open a .wave file, then run :checkhealth wave."