Anvil
fangorn/ex_git_objectstore public
ref:main
Coverage: 0.0%
0/13 lines covered
1 
# Copyright 2026 Cole Christensen
2 
#
3 
# Licensed under the Apache License, Version 2.0 (the "License");
4 
# you may not use this file except in compliance with the License.
5 
# You may obtain a copy of the License at
6 
#
7 
#     http://www.apache.org/licenses/LICENSE-2.0
8 
#
9 
# Unless required by applicable law or agreed to in writing, software
10 
# distributed under the License is distributed on an "AS IS" BASIS,
11 
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 
# See the License for the specific language governing permissions and
13 
# limitations under the License.
14
15 
defmodule Mix.Tasks.LicenseCheck do
16 
  @moduledoc """
17 
  Checks that all .ex and .exs source files contain the Apache 2.0 license header.
18
19 
  ## Usage
20
21 
      mix license_check
22
23 
  Returns exit code 1 if any files are missing the header.
24 
  """
25 
  @shortdoc "Verify Apache 2.0 license headers on all source files"
26
27 
  use Mix.Task
28
29 
  @expected_first_line "# Copyright 2026 Cole Christensen"
30
31 
  @impl Mix.Task
32 
  def run(_args) do
33 
    files =
34 
      (Path.wildcard("lib/**/*.ex") ++
35 
         Path.wildcard("test/**/*.ex") ++
36 
         Path.wildcard("test/**/*.exs") ++
37 
         ["mix.exs"])
38 
      |> Enum.filter(&File.exists?/1)
39
40 
    missing =
41 
      Enum.filter(files, fn file ->
42 
        case File.open(file, [:read, :utf8]) do
43 
          {:ok, device} ->
44 
            first_line = IO.read(device, :line) |> String.trim_trailing()
45 
            File.close(device)
46 
            first_line != @expected_first_line
47
48 
          {:error, _} ->
49 
            true
50 
        end
51 
      end)
52
53 
    if missing == [] do
54 
      Mix.shell().info("All #{length(files)} files have license headers.")
55 
    else
56 
      Mix.shell().error("Missing license header in #{length(missing)} file(s):")
57
58 
      Enum.each(missing, fn file ->
59 
        Mix.shell().error("  #{file}")
60 
      end)
61
62 
      Mix.raise("License check failed. Add the Apache 2.0 header to the files listed above.")
63 
    end
64 
  end
65 
end
66
67