add pre-commit hooks, fix formatting

Author: Elias Werner

.githooks/README.md

@@ -0,0 +1,10 @@
+For project contributors:
+
+Feel free to use this pre-commit hooks in your local setups.
+
+It does the same as the workflows that run on github:
+- format the files with black
+- linting the files with flake8
+- run the tests
+
+Just copy the file into your `.git/hooks/` directory or set it up via a `.pre-commit-config.yaml` file. 

.githooks/pre-commit

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# Git pre-commit hook to run code quality checks
+# This hook runs black, flake8, and pytest before allowing commits
+
+set -e
+
+# 1. Run black with line length 79
+echo "Running black formatting check..."
+if ! black -l 79 .; then
+    echo "❌ Black formatting failed. Please fix formatting issues."
+    exit 1
+fi
+echo "✅ Black formatting passed"
+
+# 2. Run flake8 on jumper_extension directory
+echo "Running flake8 linting..."
+if ! flake8 --extend-ignore=E203 src; then
+    echo "❌ Flake8 linting failed. Please fix linting issues."
+    exit 1
+fi
+echo "✅ Flake8 linting passed"
+
+
+# 3. Run pytest with coverage
+echo "Running tests..."
+if ! python -m unittest tests.test_userpersistence; then
+    echo "❌ Tests failed. Please fix failing tests Maybe you need to install the recent version of ther kernel via pip install . && python -m scorepjupyter.install."
+    exit 1
+fi
+
+if ! python -m unittest tests.test_kernel; then
+    echo "❌ Tests failed. Please fix failing tests."
+    exit 1
+fi
+
+echo "✅ All tests passed"
+
+echo "🎉 All pre-commit checks passed! Proceeding with commit."

src/scorep_jupyter/kernel.py

@@ -903,7 +903,8 @@ async def do_execute(
             if shutil.which("vampir") is None:
                 self.log_error(KernelErrorCode.VAMPIR_NOT_FOUND)
             else:
-                self.cell_output("Vampir will be launched after next instrumented execution.")
+                self.cell_output("Vampir will be launched after next "
+                                 "instrumented execution.")
             return self.standard_reply()
         elif code.startswith("%%disable_vampir_launch"):
             self.launch_vampir_requested = False

src/scorep_jupyter/kernel_messages.py

@@ -44,8 +44,9 @@ class KernelErrorCode(Enum):
         "(looked in: {scorep_folder})"
     ),
     KernelErrorCode.VAMPIR_NOT_FOUND: (
-        'Vampir binary not found in PATH. Add it to PATH to enable automatic launch'
-        ' (e.g. in ~/.bashrc: export PATH="/path/to/vampir/bin:$PATH"' 
+        'Vampir binary not found in PATH. Add it to PATH to enable '
+        'automatic launch'
+        ' (e.g. in ~/.bashrc: export PATH="/path/to/vampir/bin:$PATH"'
     ),
 
     KernelErrorCode.VAMPIR_LAUNCH_FAILED: (