nuwiki/lua/nuwiki/install.lua

-- lua/nuwiki/install.lua — install / build the `nuwiki-ls` binary.
--
-- Strategy (matches SPEC §7.2):
--   1. Look for `bin/nuwiki-ls[.exe]` next to the plugin.
--   2. If missing or `g:nuwiki_build_from_source` is set, build with cargo.
--   3. Otherwise try to download a release asset for the current target.
--      On failure, fall back to cargo.

local M = {}

local function plugin_root()
  local source = debug.getinfo(1, 'S').source:sub(2)
  return vim.fn.fnamemodify(source, ':h:h:h')
end

local function exe_suffix()
  return vim.fn.has('win32') == 1 and '.exe' or ''
end

function M.expected_path()
  return plugin_root() .. '/bin/nuwiki-ls' .. exe_suffix()
end

function M.is_installed()
  return vim.fn.executable(M.expected_path()) == 1
end

local function target_triple()
  if vim.fn.has('win32') == 1 then
    return 'x86_64-pc-windows-msvc'
  elseif vim.fn.has('mac') == 1 then
    if vim.fn.has('arm64') == 1 or jit and jit.arch == 'arm64' then
      return 'aarch64-apple-darwin'
    end
    return 'x86_64-apple-darwin'
  elseif vim.fn.has('linux') == 1 then
    local uname = vim.uv and vim.uv.os_uname() or vim.loop.os_uname()
    local musl = (vim.fn.system('ldd --version 2>&1'):find('musl') ~= nil)
    if uname.machine == 'aarch64' or uname.machine == 'arm64' then
      return musl and 'aarch64-unknown-linux-musl' or 'aarch64-unknown-linux-gnu'
    end
    return musl and 'x86_64-unknown-linux-musl' or 'x86_64-unknown-linux-gnu'
  end
  return nil
end

local function build_from_source(dest)
  if vim.fn.executable('cargo') ~= 1 then
    vim.notify('nuwiki: cargo not found, cannot build from source',
               vim.log.levels.ERROR)
    return false
  end
  local root = plugin_root()
  vim.notify('nuwiki: building from source (cargo build --release) …', vim.log.levels.INFO)
  local _ = vim.fn.system({
    'cargo', 'build', '--release', '-p', 'nuwiki-ls',
    '--manifest-path', root .. '/Cargo.toml',
  })
  if vim.v.shell_error ~= 0 then
    vim.notify('nuwiki: cargo build failed', vim.log.levels.ERROR)
    return false
  end
  local built = root .. '/target/release/nuwiki-ls' .. exe_suffix()
  vim.fn.system({ 'cp', built, dest })
  vim.fn.system({ 'chmod', '+x', dest })
  return vim.fn.executable(dest) == 1
end

local function download_release(dest)
  local target = target_triple()
  if not target then
    return false
  end
  if vim.fn.executable('curl') ~= 1 or vim.fn.executable('tar') ~= 1 then
    return false
  end
  local url = string.format(
    'https://code.gfran.co/gffranco/nuwiki/releases/latest/download/nuwiki-ls-%s.tar.gz',
    target
  )
  local archive = vim.fn.tempname() .. '.tar.gz'
  vim.fn.system({ 'curl', '-fsSL', '-o', archive, url })
  if vim.v.shell_error ~= 0 then
    return false
  end
  local extract = vim.fn.tempname()
  vim.fn.mkdir(extract, 'p')
  vim.fn.system({ 'tar', '-xzf', archive, '-C', extract })
  if vim.v.shell_error ~= 0 then
    return false
  end
  vim.fn.system({ 'cp', extract .. '/nuwiki-ls' .. exe_suffix(), dest })
  vim.fn.system({ 'chmod', '+x', dest })
  return vim.fn.executable(dest) == 1
end

function M.install()
  local dest = M.expected_path()
  vim.fn.mkdir(vim.fn.fnamemodify(dest, ':h'), 'p')

  if vim.g.nuwiki_build_from_source == 1 then
    return build_from_source(dest)
  end
  if download_release(dest) then
    vim.notify('nuwiki: installed ' .. dest, vim.log.levels.INFO)
    return true
  end
  vim.notify('nuwiki: download failed, falling back to source build',
             vim.log.levels.WARN)
  return build_from_source(dest)
end

return M