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path: root/lua/nvim-lsp-installer/installers/zx.lua
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local fs = require("nvim-lsp-installer.fs")
local path = require("nvim-lsp-installer.path")
local installers = require("nvim-lsp-installer.installers")
local shell = require("nvim-lsp-installer.installers.shell")

local uv = vim.loop

local M = {}

local INSTALL_DIR = path.concat { vim.fn.stdpath("data"), "lsp_servers", ".zx" }
local ZX_EXECUTABLE = path.concat { INSTALL_DIR, "node_modules", ".bin", "zx" }

local has_installed_zx = false

local function zx_installer(force)
    force = force or false -- be careful with boolean logic if flipping this

    return function (_, callback)
        if has_installed_zx and not force then
            callback(true, "zx already installed")
            return
        end

        if vim.fn.executable("npm") ~= 1 or vim.fn.executable("node") ~= 1 then
            callback(false, "Cannot install zx because npm and/or node not installed.")
            return
        end

        local is_zx_already_installed = fs.file_exists(ZX_EXECUTABLE)
        local npm_command = is_zx_already_installed and "update" or "install"

        print(("Preparing for :LspInstall, please wait… ($ npm %s zx)"):format(npm_command))

        fs.mkdirp(INSTALL_DIR)

        uv.spawn(
            "npm",
            {
                args = { npm_command, "zx@1" },
                cwd = INSTALL_DIR,
            },
            vim.schedule_wrap(function (code)
                if code ~= 0 then
                    callback(false, "Failed to install zx.")
                    return
                end
                has_installed_zx = true
                vim.cmd [[ echon "" ]] -- clear the previously printed feedback message… ¯\_(ツ)_/¯
                callback(true, nil)
            end)
        )
    end
end

function M.file(relpath)
    local script_path = path.realpath(relpath, 3)
    return installers.compose {
        shell.raw(("%q %q"):format(
            ZX_EXECUTABLE,
            script_path
        )),
        zx_installer(false)
    }
end

return M