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credo
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A static code analysis tool with a focus on code consistency and teaching.
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lib/credo/cli/command/explain.ex
defmodule Credo.CLI.Command.Explain do
use Credo.CLI.Command
@shortdoc "Show code object and explain why it is/might be an issue"
alias Credo.Check.Runner
alias Credo.Config
alias Credo.CLI.Output.Explain
alias Credo.CLI.Output.UI
alias Credo.CLI.Output
alias Credo.Sources
# TODO: explain used config options
def run(_args, %Config{help: true}), do: print_help()
def run([], _), do: print_help()
def run([file | _], config) do
{_, source_files} = load_and_validate_source_files(config)
{_, {source_files, config}} = run_checks(source_files, config)
file
|> String.split(":")
|> print_result(source_files, config)
# TODO: return :error if there are issues so the CLI can exit with a status
# code other than zero
:ok
end
defp load_and_validate_source_files(config) do
{time_load, {valid_source_files, invalid_source_files}} =
:timer.tc fn ->
config
|> Sources.find
|> Enum.partition(&(&1.valid?))
end
invalid_source_files
|> Output.complain_about_invalid_source_files
{time_load, valid_source_files}
end
defp run_checks(source_files, config) do
:timer.tc fn ->
Runner.run(source_files, config)
end
end
defp output_mod(_) do
Explain
end
defp print_result([filename], source_files, config) do
print_result([filename, nil, nil], source_files, config)
end
defp print_result([filename, line_no], source_files, config) do
print_result([filename, line_no, nil], source_files, config)
end
defp print_result([filename, line_no, column], source_files, config) do
source_files
|> Enum.find(&(&1.filename == filename))
|> print_result(config, line_no, column)
end
def print_result(source_file, config, line_no, column) do
output = output_mod(config)
output.print_before_info([source_file], config)
source_file
|> output.print_after_info(config, line_no, column)
end
defp print_help do
["Usage: ", :olive, "mix credo explain path_line_no_column [options]"]
|> UI.puts
"""
Explain the given issue.
"""
|> UI.puts
["Example: ", :olive, :faint, "$ mix credo explain lib/foo/bar.ex:13:6"]
|> UI.puts
"""
General options:
-v, --version Show version
-h, --help Show this help
"""
|> UI.puts
end
end