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A code generation and project patching framework
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lib/igniter/upgrades/igniter.ex
# SPDX-FileCopyrightText: 2024 igniter contributors <https://github.com/ash-project/igniter/graphs/contributors>
#
# SPDX-License-Identifier: MIT
defmodule Igniter.Upgrades.Igniter do
@moduledoc false
alias Igniter.Code.Common
alias Igniter.Code.Module
alias Sourceror.Zipper
require Common
@doc """
Rewrites deprecated `igniter/2` callback to `igniter/1` if the module
is an `Igniter.Mix.Task`.
"""
@spec rewrite_deprecated_igniter_callback(Zipper.t()) :: {:ok, Zipper.t()} | :error
def rewrite_deprecated_igniter_callback(%Zipper{} = zipper) do
with {:ok, zipper} <- Module.move_to_module_using(zipper, [Igniter.Mix.Task]),
{:ok, zipper} <- Common.move_to_pattern(zipper, {:def, _, [{:igniter, _, [_, _]} | _]}) do
with :error <- remove_ignored_argv(zipper),
:error <- replace_generated_argv_usage(zipper) do
{:ok, zipper}
end
else
_ -> {:ok, zipper}
end
end
defp remove_ignored_argv(zipper) do
with %Zipper{node: {argv_var, _, nil}} <-
Zipper.search_pattern(zipper, "igniter(__, __cursor__())"),
"_" <> _ <- to_string(argv_var) do
remove_argv_arg(zipper)
else
_ -> :error
end
end
defp replace_generated_argv_usage(zipper) do
with {:ok, zipper} <- remove_argv_arg(zipper),
{:ok, zipper} <- Common.move_to_do_block(zipper),
zipper <- Common.maybe_move_to_block(zipper),
true <- generated_argv_usage?(zipper) do
zipper =
zipper
|> Zipper.remove()
|> Zipper.next()
|> Common.replace_code("""
arguments = igniter.args.positional
options = igniter.args.options
argv = igniter.args.argv_flags
""")
{:ok, zipper}
else
_ -> :error
end
end
defp generated_argv_usage?(zipper) do
with ^zipper <- Zipper.search_pattern(zipper, "{arguments, argv} = positional_args!(argv)"),
{:ok, zipper} <- Common.move_right(zipper, 1),
^zipper <- Zipper.search_pattern(zipper, "options = options!(argv)") do
true
else
_ -> false
end
end
defp remove_argv_arg(zipper) do
Common.within(zipper, fn zipper ->
case Zipper.search_pattern(zipper, "igniter(__, __cursor__())") do
%Zipper{} = zipper -> {:ok, Zipper.remove(zipper)}
_ -> :error
end
end)
end
end