diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 000000000..94d110b33
--- /dev/null
+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,37 @@
+name: "CodeQL"
+on:
+  workflow_dispatch:
+  #push:
+  #  branches: [master]
+  #pull_request:
+  #  branches: [master]
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: ["python"]
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v3
+    
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v2
+      with:
+        languages: ${{ matrix.language }}
+        queries: security-and-quality
+    
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v2
+    
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v2
\ No newline at end of file
diff --git a/.github/workflows/cygwin-test.yml b/.github/workflows/cygwin-test.yml
deleted file mode 100644
index a1ecb6785..000000000
--- a/.github/workflows/cygwin-test.yml
+++ /dev/null
@@ -1,50 +0,0 @@
-name: test-cygwin
-
-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"
-    
-    steps:
-    - name: Force LF line endings
-      run: git config --global core.autocrlf input
-    - uses: actions/checkout@v3
-      with:
-        fetch-depth: 9999
-    - uses: cygwin/cygwin-install-action@v4
-      with:
-        packages: python39 python39-pip python39-virtualenv git
-    - name: Tell git to trust this repo
-      shell: bash.exe -eo pipefail -o igncr "{0}"
-      run: | 
-          /usr/bin/git config --global --add safe.directory $(pwd)
-          /usr/bin/git config --global protocol.file.allow always
-    - name: Install dependencies and prepare tests
-      shell: bash.exe -eo pipefail -o igncr "{0}"
-      run: |
-        set -x
-        /usr/bin/python -m pip install --upgrade pip setuptools wheel
-        /usr/bin/python --version; /usr/bin/git --version
-        /usr/bin/git submodule update --init --recursive
-        /usr/bin/git fetch --tags
-        /usr/bin/python -m pip install -r requirements.txt
-        /usr/bin/python -m pip install -r test-requirements.txt
-        TRAVIS=yes ./init-tests-after-clone.sh
-        /usr/bin/git config --global user.email "travis@ci.com"
-        /usr/bin/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: Test with pytest
-      shell: bash.exe -eo pipefail -o igncr "{0}"
-      run: |
-        /usr/bin/python -m pytest
-      continue-on-error: false
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
deleted file mode 100644
index c78a4053a..000000000
--- a/.github/workflows/lint.yml
+++ /dev/null
@@ -1,14 +0,0 @@
-name: Lint
-
-on: [push, pull_request, workflow_dispatch]
-
-jobs:
-  lint:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
-        with:
-          python-version: "3.x"
-      - uses: pre-commit/action@v3.0.0
diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
deleted file mode 100644
index 6d6c67952..000000000
--- a/.github/workflows/pythonpackage.yml
+++ /dev/null
@@ -1,70 +0,0 @@
-# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
-# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
-
-name: Python package
-
-on: [push, pull_request, workflow_dispatch]
-
-permissions:
-  contents: read
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        python-version: [3.7, 3.8, 3.9, "3.10", "3.11"]
-
-    steps:
-    - uses: actions/checkout@v3
-      with:
-        fetch-depth: 9999
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: Install dependencies and prepare tests
-      run: |
-        set -x
-
-        python -m pip install --upgrade pip setuptools wheel
-        python --version; git --version
-        git submodule update --init --recursive
-        git fetch --tags
-
-        pip install -r requirements.txt
-        pip install -r test-requirements.txt
-        TRAVIS=yes ./init-tests-after-clone.sh
-
-        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: Check types with mypy
-      # With new versions of pypi new issues might arise. This is a problem if there is nobody able to fix them,
-      # so we have to ignore errors until that changes.
-      continue-on-error: true
-      run: |
-        set -x
-        mypy -p git
-
-    - name: Tell git to trust this repo
-      run: | 
-          /usr/bin/git config --global --add safe.directory $(pwd)
-          /usr/bin/git config --global protocol.file.allow always
-
-    - name: Test with pytest
-      run: |
-        set -x
-        pytest
-      continue-on-error: false
-
-    - name: Documentation
-      run: |
-        set -x
-        pip install -r doc/requirements.txt
-        make -C doc html