defmodule Mix.Tasks.Igniter.Install do
  @moduledoc """
  Install a package or packages, and run any associated installers.

  ## Args

  mix igniter.install package1 package2 package3

  ## Package formats

  * `package` - The latest version of the package will be installed, pinned at the
     major version, or minor version if there is no major version yet.
  * `package@version` - The package will be installed at the specified version.
     If the version given is generic, like `3.0`, it will be pinned as described above.
     if it is specific, like `3.0.1`, it will be pinned at that *exact* version with `==`.
  * `package@git:git_url` - The package will be installed from the specified git url.
  * `package@github:project/repo` - The package will be installed from the specified github repo.
  * `package@path:path/to/dep` - The package will be installed from the specified path.

  ## Switches

  * `--dry-run` - Run the task without making any changes.
  * `--yes` - Automatically answer yes to any prompts.
  * `--example` - Request that installed packages include initial example code.
  """
  use Mix.Task

  @requirements "deps.compile"

  @impl true
  @shortdoc "Install a package or packages, and run any associated installers."
  def run(argv) do
    Mix.Task.run("compile")
    {packages, argv} = Enum.split_while(argv, fn arg -> !String.starts_with?(arg, "-") end)

    if Enum.empty?(packages) do
      raise ArgumentError, "must provide at least one package to install"
    end

    Application.ensure_all_started([:rewrite])

    Igniter.Util.Install.install(Enum.join(packages, ","), argv)
  end
end