Add mixed-line-ending hook declaration

.pre-commit-hooks.yaml

@@ -123,6 +123,12 @@
     entry: forbid-new-submodules
     description: Prevent addition of new git submodules
     files: ''
+-   id: mixed-line-ending
+    name: Mixed line ending
+    language: python
+    entry: mixed-line-ending
+    description: Replaces or checks mixed line ending
+    files: ''
 -   id: name-tests-test
     name: Tests should end in _test.py
     description: This verifies that test files are named correctly

README.md

@@ -54,6 +54,11 @@ Add this to your `.pre-commit-config.yaml`
     - To remove the coding pragma pass `--remove` (useful in a python3-only codebase)
 - `flake8` - Run flake8 on your python files.
 - `forbid-new-submodules` - Prevent addition of new git submodules.
+- `mixed-line-ending` - Replaces or checks mixed line ending.
+    - `--fix={auto,crlf,lf,no}`
+        - `auto` - Replace automatically the most frequent line ending.
+        - `crlf`, `lf` - Force to replace line ending by respectively CRLF and LF.
+        - `no` - Checks if there is any mixed line ending.
 - `name-tests-test` - Assert that files in tests/ end in `_test.py`.
     - Use `args: ['--django']` to match `test*.py` instead.
 - `no-commit-to-branch` - Protect specific branches from direct checkins.

hooks.yaml

@@ -123,6 +123,12 @@
     entry: forbid-new-submodules
     description: Prevent addition of new git submodules
     files: ''
+-   id: mixed-line-ending
+    name: Mixed line ending
+    language: python
+    entry: mixed-line-ending
+    description: Replaces or checks mixed line ending
+    files: ''
 -   id: name-tests-test
     name: Tests should end in _test.py
     description: This verifies that test files are named correctly

setup.py

@@ -51,6 +51,7 @@ setup(
             'end-of-file-fixer = pre_commit_hooks.end_of_file_fixer:end_of_file_fixer',
             'fix-encoding-pragma = pre_commit_hooks.fix_encoding_pragma:main',
             'forbid-new-submodules = pre_commit_hooks.forbid_new_submodules:main',
+            'mixed-line-ending = pre_commit_hooks.mixed_line_ending:mixed_line_ending',
             'name-tests-test = pre_commit_hooks.tests_should_end_in_test:validate_files',
             'no-commit-to-branch = pre_commit_hooks.no_commit_to_branch:main',
             'pretty-format-json = pre_commit_hooks.pretty_format_json:pretty_format_json',