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credo
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0.0.1-dev
A static code analysis tool with a focus on code consistency and teaching.
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Files
lib/credo/check/readability/alias_as.ex
defmodule Credo.Check.Readability.AliasAs do
@moduledoc false
@checkdoc """
Aliases which are not completely renamed using the `:as` option are easier to follow.
# preferred
alias MyApp.Module1
# NOT preferred
alias MyApp.Module1, as: M1
Like all `Readability` issues, this one is not a technical concern.
But you can improve the odds of others reading and liking your code by making
it easier to follow.
"""
@explanation [check: @checkdoc]
use Credo.Check, base_priority: :low
alias Credo.Code
@doc false
def run(source_file, params \\ []) do
source_file
|> Code.prewalk(&traverse(&1, &2, IssueMeta.for(source_file, params)))
|> Enum.reverse()
end
defp traverse(ast, issues, issue_meta), do: {ast, add_issue(issues, issue(ast, issue_meta))}
defp add_issue(issues, nil), do: issues
defp add_issue(issues, issue), do: [issue | issues]
defp issue({:alias, _, [{:__MODULE__, _, nil}, [as: {_, meta, _}]]}, issue_meta),
do: issue_for(issue_meta, meta[:line], inspect(:__MODULE__))
defp issue({:alias, _, [{_, _, original}, [as: {_, meta, _}]]}, issue_meta),
do: issue_for(issue_meta, meta[:line], inspect(Module.concat(original)))
defp issue(_ast, _issue_meta), do: nil
defp issue_for(issue_meta, line_no, trigger) do
format_issue(
issue_meta,
message: "Avoid using the :as option with alias.",
trigger: trigger,
line_no: line_no
)
end
end