Current section
Files
Jump to
Current section
Files
lib/dogma/rule/trailing_blank_lines.ex
use Dogma.RuleBuilder
defrule Dogma.Rule.TrailingBlankLines do
@moduledoc """
A rule that disallows trailing blank lines as the end of a source file.
"""
@violation_regex ~r/\n\n+\z/
def test(_rule, script) do
case script |> violation? do
false -> []
pos -> [error( pos )]
end
end
defp violation?(script) do
@violation_regex
|> Regex.run( script.source, return: :index )
|> case do
nil -> false
[{_, n}] ->
length( script.lines ) + 2 - n
end
end
defp error(pos) do
%Error{
rule: __MODULE__,
message: "Blank lines detected at end of file",
line: Dogma.Script.line(pos),
}
end
end