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A static code analysis tool with a focus on code consistency and teaching.
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Files
lib/credo/cli/task/prepare_checks_to_run.ex
defmodule Credo.CLI.Task.PrepareChecksToRun do
@moduledoc false
use Credo.Execution.Task
def call(exec, _opts \\ []) do
source_files = Execution.get_source_files(exec)
exec
|> set_config_comments(source_files)
|> enable_disabled_checks_if_applicable()
|> exclude_low_priority_checks(exec.min_priority - 9)
|> exclude_checks_based_on_elixir_version
end
defp set_config_comments(exec, source_files) do
config_comment_map =
source_files
|> Credo.Check.ConfigCommentFinder.run()
|> Enum.into(%{})
%{exec | config_comment_map: config_comment_map}
end
defp enable_disabled_checks_if_applicable(%Execution{enable_disabled_checks: nil} = exec) do
exec
end
defp enable_disabled_checks_if_applicable(exec) do
enable_disabled_checks_regexes = to_match_regexes(exec.enable_disabled_checks)
enable_disabled_checks =
Enum.map(exec.checks.disabled, fn
{check, params} ->
if matches?(to_string(check), enable_disabled_checks_regexes) do
{check, params}
else
{check, false}
end
end)
checks = Keyword.merge(exec.checks.enabled, enable_disabled_checks)
%{exec | checks: %{enabled: checks, disabled: exec.checks.disabled}}
end
defp exclude_low_priority_checks(exec, below_priority) do
checks =
Enum.reject(exec.checks.enabled, fn
# deprecated
{check} ->
Credo.Priority.to_integer(check.base_priority()) < below_priority
{_check, false} ->
true
{check, params} ->
priority =
params
|> Credo.Check.Params.priority(check)
|> Credo.Priority.to_integer()
priority < below_priority
end)
%{exec | checks: %{enabled: checks, disabled: exec.checks.disabled}}
end
defp exclude_checks_based_on_elixir_version(exec) do
elixir_version = System.version()
skipped_checks = Enum.reject(exec.checks.enabled, &matches_requirement?(&1, elixir_version))
checks = Enum.filter(exec.checks.enabled, &matches_requirement?(&1, elixir_version))
%{
exec
| checks: %{enabled: checks, disabled: exec.checks.disabled},
skipped_checks: skipped_checks
}
end
defp matches_requirement?({check, _}, elixir_version) do
matches_requirement?({check}, elixir_version)
end
defp matches_requirement?({check}, elixir_version) do
Version.match?(elixir_version, check.elixir_version())
end
defp to_match_regexes(nil), do: []
defp to_match_regexes(list) do
Enum.map(list, fn match_check ->
{:ok, match_pattern} = Regex.compile(match_check, "i")
match_pattern
end)
end
defp matches?(_string, nil), do: false
defp matches?(string, list) when is_list(list), do: Enum.any?(list, &matches?(string, &1))
defp matches?(string, %Regex{} = regex), do: Regex.match?(regex, string)
defp matches?(string, pattern) when is_binary(pattern), do: String.contains?(string, pattern)
end