kmx git

/*
 * Copyright 2022 Thomas de Grivel <thoxdg@gmail.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
## cl89
## Copyright 2022 kmx.io <contact@kmx.io>
##
## Permission is hereby granted to use this software granted
## the above copyright notice and this permission paragraph
## are included in all copies and substantial portions of this
## software.
##
## THIS SOFTWARE IS PROVIDED "AS-IS" WITHOUT ANY GUARANTEE OF
## PURPOSE AND PERFORMANCE. IN NO EVENT WHATSOEVER SHALL THE
## AUTHOR BE CONSIDERED LIABLE FOR THE USE AND PERFORMANCE OF
## THIS SOFTWARE.

defmodule Header.Make do
  def split(src) do
    split(src, [])
  end

  def split([line = ("#" <> _) | rest], acc) do
    split(rest, [line | acc])
  end
  def split(rest, acc) do
    {Enum.reverse(acc) |> Enum.join("\n"), rest |> Enum.join("\n")}
  end

  def main([src_path | dest_paths]) do
    {:ok, src} = File.read(src_path)
    src_lines = String.split(src, "\n")
    {header, _} = split(src_lines)
    Enum.each dest_paths, fn dest_path ->
      {:ok, dest} = File.read(dest_path)
      dest_lines = String.split(dest, "\n")
      {_, rest} = split(dest_lines)
      result = header <> "\n" <> rest
      File.write(dest_path, result)
    end
  end
end
kmx.io/kmxgit/lib/header/make.ex

Commit

lib/header/make.ex
