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lib/credo/check/runner.ex

defmodule Credo.Check.Runner do
alias Credo.Config
alias Credo.SourceFile
def run(source_files, config) when is_list(source_files) do
config =
config
|> inject_lint_attributes(source_files)
source_files =
source_files
|> run_checks_that_run_on_all(config)
|> Enum.map(&Task.async(fn -> run(&1, config) end))
|> Enum.map(&Task.await(&1, 30_000))
{source_files, config}
end
def run(%SourceFile{} = source_file, config) do
checks = config |> Config.checks |> Enum.reject(&run_on_all_check?/1)
issues = run_checks(source_file, checks, config)
%SourceFile{source_file | issues: source_file.issues ++ issues}
end
defp inject_lint_attributes(config, source_files) do
lint_attribute_map =
source_files
|> run_linter_attribute_reader(config)
|> Enum.reduce(%{}, fn(source_file, memo) ->
# TODO: we should modify the config "directly" instead of going
# through the SourceFile
Map.put(memo, source_file.filename, source_file.lint_attributes)
end)
%Config{config | lint_attribute_map: lint_attribute_map}
end
defp run_linter_attribute_reader(source_files, config) do
checks = [{Credo.Check.FindLintAttributes}]
Enum.reduce(checks, source_files, fn(check_tuple, source_files) ->
run_check(check_tuple, source_files, config)
end)
end
defp run_checks_that_run_on_all(source_files, config) do
checks = config |> Config.checks |> Enum.filter(&run_on_all_check?/1)
Enum.reduce(checks, source_files, fn(check_tuple, source_files) ->
run_check(check_tuple, source_files, config)
end)
end
defp run_checks(%SourceFile{} = source_file, checks, config) when is_list(checks) do
checks
|> Enum.flat_map(&run_check(&1, source_file, config))
end
defp run_check({_check, false}, source_files, _config) when is_list(source_files) do
source_files
end
defp run_check({_check, false}, _source_file, _config) do
[]
end
defp run_check({check}, source_file, config) do
run_check({check, []}, source_file, config)
end
defp run_check({check, params}, source_file, %Config{crash_on_error: true}) do
check.run(source_file, params)
end
defp run_check({check, params}, source_file, _config) do
try do
check.run(source_file, params)
rescue
_ ->
IO.puts "Error while running #{check} on #{source_file.filename}"
[]
end
end
defp run_on_all_check?({check}), do: check.run_on_all?
defp run_on_all_check?({check, _params}), do: check.run_on_all?
end