gemini-code-review.sh

gemini-code-review.sh

#!/bin/bash

# Gemini Code Review Hook for Claude Code
# This script calls Gemini CLI to review code changes made by Claude Code

# Read JSON input from Claude Code
json_input=$(cat)

# Extract tool information
tool_name=$(echo "$json_input" | jq -r '.tool_name // empty')
tool_input=$(echo "$json_input" | jq -r '.tool_input // {}')

# Only proceed if this is a code editing tool
if [[ "$tool_name" != "Edit" && "$tool_name" != "MultiEdit" && "$tool_name" != "Write" ]]; then
    exit 0
fi

# Extract file path and content changes
file_path=$(echo "$tool_input" | jq -r '.file_path // empty')
new_string=$(echo "$tool_input" | jq -r '.new_string // empty')
content=$(echo "$tool_input" | jq -r '.content // empty')

# Skip if no meaningful code changes
if [[ -z "$file_path" || (-z "$new_string" && -z "$content") ]]; then
    exit 0
fi

# Skip non-code files
case "$file_path" in
    *.md|*.txt|*.json|*.yml|*.yaml|*.xml) exit 0 ;;
esac

# Check if gemini CLI is available
if ! command -v gemini &> /dev/null; then
    echo "⚠️  Gemini CLI not found. Please install it first."
    echo "   Install: npm install -g @google-ai/generativelanguage"
    exit 0
fi

echo "🤖 Gemini reviewing code changes in $(basename "$file_path")..."

# Prepare the review prompt
review_prompt="Please review this code change and provide feedback on:
1. Code quality and best practices
2. Potential bugs or issues
3. Security considerations
4. Performance implications
5. Suggestions for improvement

File: $file_path
Changes: ${new_string:-$content}"

# Create temporary file for the review
temp_file=$(mktemp)
echo "$review_prompt" > "$temp_file"

# Create review output file with timestamp
review_file="gemini-reviews/review-$(date +%Y%m%d-%H%M%S).md"
mkdir -p "$(dirname "$review_file")"

# Call Gemini CLI in non-interactive mode
echo "📝 Gemini Code Review:"
echo "----------------------------------------"

# Create review header for file
{
    echo "# Gemini Code Review - $(date)"
    echo ""
    echo "**File:** $file_path"
    echo ""
    echo "## Review"
    echo ""
} > "$review_file"

# Get the review from Gemini and capture it
if review_output=$(gemini -p "$(cat "$temp_file")" 2>/dev/null); then
    # Display the review in Claude (this won't show in conversation but will be in hook logs)
    echo "$review_output"
    echo ""
    echo "---"
    echo "💾 Review saved to: $review_file"
    
    # Save the review to file
    echo "$review_output" >> "$review_file"
    echo "" >> "$review_file"
    echo "---" >> "$review_file"
    echo "Review saved to: $review_file" >> "$review_file"
    
    # Create/update a latest review file for easy access
    echo "$review_output" > "gemini-reviews/latest-review.md"
    echo "📝 Latest review available at: gemini-reviews/latest-review.md"
else
    error_msg="❌ Failed to get Gemini review. Please check your Gemini CLI setup.
   Make sure Gemini CLI is properly authenticated."
    echo "$error_msg"
    echo "$error_msg" >> "$review_file"
    echo "$error_msg" > "gemini-reviews/latest-review.md"
fi

echo "----------------------------------------"

# Clean up temp file
rm "$temp_file"