@@ -1,38 +1,26 @@
 [flake8]
+
 show-source = True
-count= True
+count = True
 statistics = True
-# E265 = comment blocks like @{ section, which it can't handle
+
 # E266 = too many leading '#' for block comment
 # E731 = do not assign a lambda expression, use a def
-# W293 = Blank line contains whitespace
-# W504 = Line break after operator
-# E704 = multiple statements in one line  - used for @override
 # TC002 = move third party import to TYPE_CHECKING
-# ANN = flake8-annotations
 # TC, TC2 = flake8-type-checking
-# D = flake8-docstrings
 
 # select = C,E,F,W ANN, TC, TC2  # to enable code. Disabled if not listed, including builtin codes
 enable-extensions = TC, TC2  # only needed for extensions not enabled by default
 
-ignore = E265,E266,E731,E704,
-         W293, W504,
-         ANN0 ANN1 ANN2,
-         TC002,
-         TC0, TC1, TC2
-         # B,
-         A,
-         D,
-         RST, RST3
+ignore = E266, E731
 
-exclude = .tox,.venv,build,dist,doc,git/ext/,test
+exclude = .tox, .venv, build, dist, doc, git/ext/
 
 rst-roles =  # for flake8-RST-docstrings
-    attr,class,func,meth,mod,obj,ref,term,var  # used by sphinx
+    attr, class, func, meth, mod, obj, ref, term, var  # used by sphinx
 
 min-python-version = 3.7.0
 
 # for `black` compatibility
 max-line-length = 120
-extend-ignore = E203,W503
+extend-ignore = E203, W503
@@ -1,2 +1,3 @@
 test/fixtures/* eol=lf
-init-tests-after-clone.sh
+*.sh eol=lf
+/Makefile eol=lf
@@ -3,4 +3,4 @@ updates:
 - package-ecosystem: "github-actions"
   directory: "/"
   schedule:
-      interval: "weekly"
+    interval: "weekly"
@@ -5,20 +5,24 @@ on: [push, pull_request, workflow_dispatch]
 jobs:
   build:
     runs-on: windows-latest
+
     strategy:
       fail-fast: false
+
     env:
       CHERE_INVOKING: 1
-      SHELLOPTS: igncr
       TMP: "/tmp"
       TEMP: "/tmp"
+
     defaults:
       run:
-        shell: bash.exe --noprofile --norc -exo pipefail -o igncr "{0}"
+        shell: C:\cygwin\bin\bash.exe --noprofile --norc -exo pipefail -o igncr "{0}"
 
     steps:
     - name: Force LF line endings
-      run: git config --global core.autocrlf input
+      run: |
+        git config --global core.autocrlf false  # Affects the non-Cygwin git.
+      shell: bash
 
     - uses: actions/checkout@v4
       with:
@@ -29,36 +33,42 @@ jobs:
       with:
         packages: python39 python39-pip python39-virtualenv git
 
-    - name: Show python and git versions
+    - name: Special configuration for Cygwin's git
       run: |
-        /usr/bin/python --version
-        /usr/bin/git version
-
-    - name: Tell git to trust this repo
-      run: |
-        /usr/bin/git config --global --add safe.directory "$(pwd)"
+        git config --global --add safe.directory "$(pwd)"
+        git config --global core.autocrlf false
 
     - name: Prepare this repo for tests
       run: |
-        TRAVIS=yes ./init-tests-after-clone.sh
+        ./init-tests-after-clone.sh
 
-    - name: Further prepare git configuration for tests
+    - name: Set git user identity and command aliases for the tests
       run: |
-        /usr/bin/git config --global user.email "travis@ci.com"
-        /usr/bin/git config --global user.name "Travis Runner"
+        git config --global user.email "travis@ci.com"
+        git config --global user.name "Travis Runner"
         # If we rewrite the user's config by accident, we will mess it up
         # and cause subsequent tests to fail
         cat test/fixtures/.gitconfig >> ~/.gitconfig
 
     - name: Update PyPA packages
       run: |
-        /usr/bin/python -m pip install --upgrade pip setuptools wheel
+        # Get the latest pip, wheel, and prior to Python 3.12, setuptools.
+        python -m pip install -U pip $(pip freeze --all | grep -oF setuptools) wheel
 
     - name: Install project and test dependencies
       run: |
-        /usr/bin/python -m pip install ".[test]"
+        python -m pip install ".[test]"
+
+    - name: Show version and platform information
+      run: |
+        uname -a
+        command -v git python
+        git version
+        python --version
+        python -c 'import sys; print(sys.platform)'
+        python -c 'import os; print(os.name)'
+        python -c 'import git; print(git.compat.is_win)'
 
     - name: Test with pytest
       run: |
-        set +x
-        /usr/bin/python -m pytest
+        python -m pytest --color=yes -p no:sugar --instafail -vv
@@ -7,8 +7,14 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
-        with:
-          python-version: "3.x"
-      - uses: pre-commit/action@v3.0.0
+    - uses: actions/checkout@v4
+
+    - uses: actions/setup-python@v4
+      with:
+        python-version: "3.x"
+
+    - uses: pre-commit/action@v3.0.0
+      with:
+        extra_args: --all-files --hook-stage manual
+      env:
+        SKIP: black-format
@@ -10,16 +10,15 @@ permissions:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
+
     strategy:
       fail-fast: false
       matrix:
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
         include:
-          - experimental: false
-          - python-version: "3.12"
-            experimental: true
+        - experimental: false
+
     defaults:
       run:
         shell: /bin/bash --noprofile --norc -exo pipefail {0}
@@ -36,16 +35,11 @@ jobs:
         python-version: ${{ matrix.python-version }}
         allow-prereleases: ${{ matrix.experimental }}
 
-    - name: Show python and git versions
-      run: |
-        python --version
-        git version
-
     - name: Prepare this repo for tests
       run: |
-        TRAVIS=yes ./init-tests-after-clone.sh
+        ./init-tests-after-clone.sh
 
-    - name: Prepare git configuration for tests
+    - name: Set git user identity and command aliases for the tests
       run: |
         git config --global user.email "travis@ci.com"
         git config --global user.name "Travis Runner"
@@ -55,17 +49,23 @@ jobs:
 
     - name: Update PyPA packages
       run: |
-        python -m pip install --upgrade pip
-        if pip freeze --all | grep --quiet '^setuptools=='; then
-            # Python prior to 3.12 ships setuptools. Upgrade it if present.
-            python -m pip install --upgrade setuptools
-        fi
-        python -m pip install --upgrade wheel
+        # Get the latest pip, wheel, and prior to Python 3.12, setuptools.
+        python -m pip install -U pip $(pip freeze --all | grep -oF setuptools) wheel
 
     - name: Install project and test dependencies
       run: |
         pip install ".[test]"
 
+    - name: Show version and platform information
+      run: |
+        uname -a
+        command -v git python
+        git version
+        python --version
+        python -c 'import sys; print(sys.platform)'
+        python -c 'import os; print(os.name)'
+        python -c 'import git; print(git.compat.is_win)'
+
     - name: Check types with mypy
       run: |
         mypy -p git
@@ -75,7 +75,7 @@ jobs:
 
     - name: Test with pytest
       run: |
-        pytest
+        pytest --color=yes -p no:sugar --instafail -vv
       continue-on-error: false
 
     - name: Documentation
 
@@ -1,12 +1,15 @@
 *.py[co]
 *.swp
 *~
+.env/
+env/
 .venv/
 venv/
 /*.egg-info
 /lib/GitPython.egg-info
 cover/
 .coverage
+.coverage.*
 /build
 /dist
 /doc/_build
@@ -22,4 +25,3 @@ nbproject
 .pytest_cache/
 monkeytype.sqlite3
 output.txt
-tox.ini
 
@@ -1,19 +1,39 @@
 repos:
-  - repo: https://github.com/PyCQA/flake8
-    rev: 6.0.0
-    hooks:
-      - id: flake8
-        additional_dependencies:
-          [
-            flake8-bugbear==22.12.6,
-            flake8-comprehensions==3.10.1,
-            flake8-typing-imports==1.14.0,
-          ]
-        exclude: ^doc|^git/ext/|^test/
+- repo: https://github.com/psf/black-pre-commit-mirror
+  rev: 23.9.1
+  hooks:
+  - id: black
+    alias: black-check
+    name: black (check)
+    args: [--check, --diff]
+    exclude: ^git/ext/
+    stages: [manual]
 
-  - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.4.0
-    hooks:
-      - id: check-merge-conflict
-      - id: check-toml
-      - id: check-yaml
+  - id: black
+    alias: black-format
+    name: black (format)
+    exclude: ^git/ext/
+
+- repo: https://github.com/PyCQA/flake8
+  rev: 6.1.0
+  hooks:
+  - id: flake8
+    additional_dependencies:
+    - flake8-bugbear==23.9.16
+    - flake8-comprehensions==3.14.0
+    - flake8-typing-imports==1.14.0
+    exclude: ^doc|^git/ext/
+
+- repo: https://github.com/shellcheck-py/shellcheck-py
+  rev: v0.9.0.5
+  hooks:
+  - id: shellcheck
+    args: [--color]
+    exclude: ^git/ext/
+
+- repo: https://github.com/pre-commit/pre-commit-hooks
+  rev: v4.4.0
+  hooks:
+  - id: check-toml
+  - id: check-yaml
+  - id: check-merge-conflict
@@ -52,4 +52,5 @@ Contributors are:
 -Joseph Hale <me _at_ jhale.dev>
 -Santos Gallegos <stsewd _at_ proton.me>
 -Wenhan Zhu <wzhu.cosmos _at_ gmail.com>
+
 Portions derived from other open source works and are clearly marked.
@@ -2,7 +2,7 @@
 
 The following is a short step-by-step rundown of what one typically would do to contribute.
 
-- [fork this project](https://github.com/gitpython-developers/GitPython/fork) on GitHub.
+- [Fork this project](https://github.com/gitpython-developers/GitPython/fork) on GitHub.
 - For setting up the environment to run the self tests, please run `init-tests-after-clone.sh`.
 - Please try to **write a test that fails unless the contribution is present.**
 - Try to avoid massive commits and prefer to take small steps, with one commit for each.