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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/check/config_comment.ex
defmodule Credo.Check.ConfigComment do
defstruct line_no: nil,
line_no_end: nil,
instruction: nil,
params: nil
alias Credo.Issue
@instruction_disable_file "disable-for-this-file"
@instruction_disable_next_line "disable-for-next-line"
@instruction_disable_previous_line "disable-for-previous-line"
@instruction_disable_lines "disable-for-lines"
def new("#{@instruction_disable_lines}:" <> line_count, param_string, line_no) do
line_count = String.to_integer(line_count)
params =
param_string
|> value_for()
|> List.wrap
if line_count >= 0 do
%__MODULE__{
line_no: line_no,
line_no_end: line_no + line_count,
instruction: @instruction_disable_lines,
params: params
}
else
%__MODULE__{
line_no: line_no + line_count,
line_no_end: line_no,
instruction: @instruction_disable_lines,
params: params
}
end
end
def new(instruction, param_string, line_no) do
%__MODULE__{
line_no: line_no,
instruction: instruction,
params: param_string |> value_for() |> List.wrap
}
end
def ignores_issue?(%__MODULE__{instruction: @instruction_disable_file,
params: params}, %Issue{} = issue) do
params_ignore_issue?(params, issue)
end
def ignores_issue?(%__MODULE__{instruction: @instruction_disable_next_line,
line_no: line_no,
params: params},
%Issue{line_no: line_no_issue} = issue) when line_no_issue == line_no + 1 do
params_ignore_issue?(params, issue)
end
def ignores_issue?(%__MODULE__{instruction: @instruction_disable_previous_line,
line_no: line_no,
params: params},
%Issue{line_no: line_no_issue} = issue) when line_no_issue == line_no - 1 do
params_ignore_issue?(params, issue)
end
def ignores_issue?(%__MODULE__{instruction: @instruction_disable_lines,
line_no: line_no_start,
line_no_end: line_no_end,
params: params},
%Issue{line_no: line_no_issue} = issue)
when line_no_issue >= line_no_start and line_no_issue <= line_no_end do
params_ignore_issue?(params, issue)
end
def ignores_issue?(_, _) do
false
end
defp params_ignore_issue?([], _issue) do
true
end
defp params_ignore_issue?(params, issue) when is_list(params) do
Enum.any?(params, &check_tuple_ignores_issue?(&1, issue))
end
defp check_tuple_ignores_issue?(check_or_regex, issue) do
if Regex.regex?(check_or_regex) do
issue.check
|> to_string
|> String.match?(check_or_regex)
else
issue.check == check_or_regex
end
end
defp value_for(""), do: nil
defp value_for(param_string) do
if regex_value?(param_string) do
param_string
|> String.slice(1..-2)
|> Regex.compile!("i")
else
String.to_atom("Elixir.#{param_string}")
end
end
defp regex_value?(param_string), do: param_string =~ ~r'^/.+/$'
end