zf

zenflows testing
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trailing_blank_line.ex (1077B)

      1 defmodule Credo.Check.Readability.TrailingBlankLine do
      2   use Credo.Check,
      3     base_priority: :low,
      4     tags: [:formatter],
      5     explanations: [
      6       check: """
      7       Files should end in a trailing blank line.
      8 
      9       This is mostly for historical reasons: every text file should end with a \\n,
     10       or newline since this acts as `eol` or the end of the line character.
     11 
     12       See also: http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_206
     13 
     14       Most text editors ensure this "final newline" automatically.
     15       """
     16     ]
     17 
     18   @doc false
     19   @impl true
     20   def run(%SourceFile{} = source_file, params) do
     21     issue_meta = IssueMeta.for(source_file, params)
     22 
     23     {line_no, last_line} =
     24       source_file
     25       |> SourceFile.lines()
     26       |> List.last()
     27 
     28     if String.trim(last_line) == "" do
     29       []
     30     else
     31       [issue_for(issue_meta, line_no)]
     32     end
     33   end
     34 
     35   defp issue_for(issue_meta, line_no) do
     36     format_issue(
     37       issue_meta,
     38       message: "There should be a final \\n at the end of each file.",
     39       line_no: line_no
     40     )
     41   end
     42 end