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A code generation and project patching framework
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lib/igniter/project/formatter.ex
defmodule Igniter.Project.Formatter do
@moduledoc "Codemods and utilities for interacting with `.formatter.exs` files"
alias Igniter.Code.Common
alias Sourceror.Zipper
@default_formatter """
# Used by "mix format"
[
inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
]
"""
@doc """
Adds a new dep to the list of imported deps in the root `.formatter.exs`
"""
@spec import_dep(Igniter.t(), dep :: atom) :: Igniter.t()
def import_dep(igniter, dep) do
igniter
|> Igniter.include_or_create_elixir_file(".formatter.exs", @default_formatter)
|> Igniter.update_elixir_file(".formatter.exs", fn zipper ->
zipper
|> Zipper.down()
|> case do
nil ->
code =
quote do
[import_deps: [unquote(dep)]]
end
Common.add_code(zipper, code)
zipper ->
zipper
|> Zipper.rightmost()
|> Igniter.Code.Keyword.put_in_keyword([:import_deps], [dep], fn nested_zipper ->
Igniter.Code.List.prepend_new_to_list(
nested_zipper,
dep
)
end)
|> case do
{:ok, zipper} ->
zipper
:error ->
{:warning,
"""
Could not import dependency #{inspect(dep)} into `.formatter.exs`.
Please add the import manually, i.e
import_deps: [#{inspect(dep)}]
"""}
end
end
end)
end
@doc """
Adds a new plugin to the list of plugins in the root `.formatter.exs`
"""
@spec add_formatter_plugin(Igniter.t(), plugin :: module()) :: Igniter.t()
def add_formatter_plugin(igniter, plugin) do
igniter
|> Igniter.include_or_create_elixir_file(".formatter.exs", @default_formatter)
|> Igniter.update_elixir_file(".formatter.exs", fn zipper ->
zipper
|> Zipper.down()
|> case do
nil ->
code =
quote do
[plugins: [unquote(plugin)]]
end
zipper
|> Common.add_code(code)
zipper ->
zipper
|> Zipper.rightmost()
|> Igniter.Code.Keyword.put_in_keyword(
[:plugins],
[Spark.Formatter],
fn nested_zipper ->
Igniter.Code.List.prepend_new_to_list(
nested_zipper,
Spark.Formatter
)
end
)
|> case do
{:ok, zipper} ->
zipper
_ ->
{:warning,
"""
Could not add formatter plugin #{inspect(plugin)} into `.formatter.exs`.
Please add the import manually, i.e
plugins: [#{inspect(plugin)}]
"""}
end
end
end)
end
end