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Automation for setting up a project for development. ## Installation mix archive.install hex gen_medic mix gen.medic ## Usage bin/dev/doctor bin/dev/update bin/dev/test

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medic lib medic checks corepack.ex
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lib/medic/checks/corepack.ex 

defmodule Medic.Checks.Corepack do

  @moduledoc """

  Corepack is a thing build into node to shim package managers.

  """



  def shim_installed?(shim) do

    with {:ok, node_version} <- node_version(),

         :ok <- corepack_shim_installed?(node_version, shim) do

      global_package_installed?(shim)

    end

  end



  defp node_version do

    case System.cmd("node", ["-v"]) do

      {"v" <> node_version, 0} -> {:ok, String.trim(node_version)}

      {output, _exit} -> {:error, "Node version not found\n#{output}", "asdf install"}

    end

  end



  defp corepack_shim_installed?(node_version, shim) do

    home = System.fetch_env!("HOME")

    [package, _version] = String.split(shim, "@")



    home

    |> Path.join([

      ".asdf/installs/nodejs/",

      node_version,

      "/lib/node_modules/corepack/shims/",

      package

    ])

    |> File.exists?()

    |> if(

      do: :ok,

      else: {:error, "Corepack #{shim} not found", "corepack enable && corepack prepare #{shim} --activate"}

    )

  end



  defp global_package_installed?(shim) do

    [package, _version] = String.split(shim, "@")



    case System.cmd("npm", ["ls", "-g", package]) do

      {output, 0} ->

        if String.contains?(output, shim),

          do: :ok,

          else: {:error, "NPM shim #{shim} not found", "npm install -g #{shim}"}



      {_error, 1} ->

        {:error, "NPM shim #{shim} not found", "npm install -g #{shim}"}



      {_error, 254} ->

        {:error, "NPM shim #{shim} not found", "npm install -g #{shim}"}

    end

  end

end