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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/cli/output.ex
defmodule Credo.CLI.Output do
@moduledoc """
This module provides helper functions regarding command line output.
"""
@category_tag_map %{"refactor" => "F"}
alias Credo.CLI.Output.UI
alias Credo.Execution
def check_tag(category, in_parens \\ true)
def check_tag(category, in_parens) when is_binary(category) do
default_tag =
category
|> String.at(0)
|> String.upcase()
tag = Map.get(@category_tag_map, category, default_tag)
if in_parens do
"[#{tag}]"
else
tag
end
end
def check_tag(category, in_parens) when is_atom(category) do
category
|> to_string
|> check_tag(in_parens)
end
def check_tag(check_mod, in_parens) do
check_mod.category
|> to_string
|> check_tag(in_parens)
end
def check_color(category) when is_binary(category) do
case category do
"consistency" -> :cyan
"readability" -> :blue
"design" -> :olive
"refactor" -> :yellow
"warning" -> :red
_ -> :magenta
end
end
def check_color(category) when is_atom(category) do
category
|> to_string
|> check_color
end
def check_color(check_mod) do
check_mod.category
|> to_string
|> check_color
end
# TODO: these need to correspond to the priorities in Credo.Priority
def issue_color(issue) do
priority = issue.priority
cond do
priority in 20..999 -> :red
priority in 10..19 -> :red
priority in 0..9 -> :yellow
priority in -10..-1 -> :blue
priority in -999..-11 -> :magenta
true -> "?"
end
end
# TODO: these need to correspond to the priorities in Credo.Priority
def priority_arrow(priority) do
cond do
priority in 20..999 -> "\u2191"
priority in 10..19 -> "\u2197"
priority in 0..9 -> "\u2192"
priority in -10..-1 -> "\u2198"
priority in -999..-11 -> "\u2193"
true -> "?"
end
end
# TODO: these need to correspond to the priorities in Credo.Priority
def priority_name(priority) do
cond do
priority in 20..999 -> "higher"
priority in 10..19 -> "high"
priority in 0..9 -> "normal"
priority in -10..-1 -> "low"
priority in -999..-11 -> "lower"
true -> "?"
end
end
@doc """
Returns a suitable foreground color for a given `background_color`.
iex> Credo.CLI.Output.foreground_color(:yellow)
:black
iex> Credo.CLI.Output.foreground_color(:blue)
:white
"""
def foreground_color(background_color)
def foreground_color(:cyan), do: :black
def foreground_color(:yellow), do: :black
def foreground_color(_), do: :white
def term_columns(default \\ 80) do
case :io.columns() do
{:ok, columns} ->
columns
_ ->
default
end
end
def complain_about_invalid_source_files([]), do: nil
def complain_about_invalid_source_files(invalid_source_files) do
invalid_source_filenames = Enum.map(invalid_source_files, & &1.filename)
output = [
:reset,
:bright,
:orange,
"info: ",
:red,
"Some source files could not be parsed correctly and are excluded:\n"
]
UI.warn(output)
print_numbered_list(invalid_source_filenames)
end
def complain_about_timed_out_source_files([]), do: nil
def complain_about_timed_out_source_files(large_source_files) do
large_source_filenames = Enum.map(large_source_files, & &1.filename)
output = [
:reset,
:bright,
:orange,
"info: ",
:red,
"Some source files were not parsed in the time allotted:\n"
]
UI.warn(output)
print_numbered_list(large_source_filenames)
end
def print_skipped_checks(%Execution{skipped_checks: []}), do: nil
def print_skipped_checks(%Execution{skipped_checks: skipped_checks}) do
msg = [
:reset,
:bright,
:orange,
"info: ",
:reset,
:faint,
"some checks were skipped because they're not compatible with\n",
:reset,
:faint,
"your version of Elixir (#{System.version()}).\n\n",
"You can deactivate these checks by adding this to the `checks` list in your config:\n"
]
UI.puts("")
UI.puts(msg)
skipped_checks
|> Enum.map(&check_name/1)
|> print_disabled_check_config
end
defp check_name({check, _check_info}), do: check_name({check})
defp check_name({check}) do
check
|> to_string
|> String.replace(~r/^Elixir\./, "")
end
defp print_numbered_list(list) do
list
|> Enum.with_index()
|> Enum.flat_map(fn {string, index} ->
[
:reset,
String.pad_leading("#{index + 1})", 5),
:faint,
" #{string}\n"
]
end)
|> UI.warn()
end
defp print_disabled_check_config(list) do
list
|> Enum.flat_map(fn string ->
[
:reset,
String.pad_leading(" ", 4),
:faint,
"{#{string}, false},\n"
]
end)
|> UI.puts()
end
end