Add support for pre-commit.sh git hook (#8095)

Co-authored-by: openhands <openhands@all-hands.dev>

.openhands/pre-commit.sh

@@ -0,0 +1,73 @@
+#!/bin/bash
+
+echo "Running OpenHands pre-commit hook..."
+
+# Store the exit code to return at the end
+# This allows us to be additive to existing pre-commit hooks
+EXIT_CODE=0
+
+# Check if frontend directory has changed
+frontend_changes=$(git diff --cached --name-only | grep "^frontend/")
+if [ -n "$frontend_changes" ]; then
+    echo "Frontend changes detected. Running frontend checks..."
+
+    # Check if frontend directory exists
+    if [ -d "frontend" ]; then
+        # Change to frontend directory
+        cd frontend || exit 1
+
+        # Run lint:fix
+        echo "Running npm lint:fix..."
+        npm run lint:fix
+        if [ $? -ne 0 ]; then
+            echo "Frontend linting failed. Please fix the issues before committing."
+            EXIT_CODE=1
+        fi
+
+        # Run build
+        echo "Running npm build..."
+        npm run build
+        if [ $? -ne 0 ]; then
+            echo "Frontend build failed. Please fix the issues before committing."
+            EXIT_CODE=1
+        fi
+
+        # Run tests
+        echo "Running npm test..."
+        npm test
+        if [ $? -ne 0 ]; then
+            echo "Frontend tests failed. Please fix the failing tests before committing."
+            EXIT_CODE=1
+        fi
+
+        # Return to the original directory
+        cd ..
+
+        if [ $EXIT_CODE -eq 0 ]; then
+            echo "Frontend checks passed!"
+        fi
+    else
+        echo "Frontend directory not found. Skipping frontend checks."
+    fi
+else
+    echo "No frontend changes detected. Skipping frontend checks."
+fi
+
+# Run any existing pre-commit hooks that might have been installed by the user
+# This makes our hook additive rather than replacing existing hooks
+if [ -f ".git/hooks/pre-commit.local" ]; then
+    echo "Running existing pre-commit hooks..."
+    bash .git/hooks/pre-commit.local
+    if [ $? -ne 0 ]; then
+        echo "Existing pre-commit hooks failed."
+        EXIT_CODE=1
+    fi
+fi
+
+if [ $EXIT_CODE -eq 0 ]; then
+    echo "All pre-commit checks passed!"
+else
+    echo "Some pre-commit checks failed. Please fix the issues before committing."
+fi
+
+exit $EXIT_CODE

.openhands/setup.sh

@@ -2,4 +2,11 @@
 
 echo "Setting up the environment..."
 
+# Install pre-commit package
 python -m pip install pre-commit
+
+# Install pre-commit hooks if .git directory exists
+if [ -d ".git" ]; then
+    echo "Installing pre-commit hooks..."
+    pre-commit install
+fi