The script checks for remote-less local branches and prunes it

git_cleanup.sh

#!/bin/zsh

# Git branch cleanup script - removes local branches whose remotes were deleted
# Usage: ./git_cleanup.sh [path-to-git-repo]

set -e

# Handle path parameter
if [ $# -gt 1 ]; then
    echo "Usage: $0 [path-to-git-repo]"
    exit 1
fi

REPO_PATH=${1:-.}

# Change to the specified directory
if [ ! -d "$REPO_PATH" ]; then
    echo "❌ Error: Directory '$REPO_PATH' does not exist"
    exit 1
fi

cd "$REPO_PATH"

# Check if it's a git repository
if [ ! -d ".git" ] && ! git rev-parse --git-dir > /dev/null 2>&1; then
    echo "❌ Error: '$REPO_PATH' is not a git repository"
    exit 1
fi

echo "📁 Working in repository: $(pwd)"
echo "🔍 Checking for branches with deleted remotes..."

# First, prune remote tracking branches
echo "📡 Pruning remote tracking branches..."
git remote prune origin

# Get list of local branches that track deleted remotes
GONE_BRANCHES=$(git for-each-ref --format '%(refname:short) %(upstream:track)' refs/heads | awk '$2 == "[gone]" {print $1}')

if [ -z "$GONE_BRANCHES" ]; then
    echo "✅ No branches found with deleted remotes."
    exit 0
fi

echo "🗑️  Found branches with deleted remotes:"
echo "$GONE_BRANCHES" | sed 's/^/  - /'

# Ask for confirmation
echo -n "❓ Do you want to delete these branches? (y/N): "
read -r REPLY
if [[ ! $REPLY =~ ^[Yy]$ ]]; then
    echo "❌ Cancelled."
    exit 0
fi

# Delete the branches
echo "🗑️  Deleting branches..."
echo "$GONE_BRANCHES" | while read -r branch; do
    if [ -n "$branch" ]; then
        echo "  Deleting: $branch"
        git branch -D "$branch"
    fi
done

echo "✅ Cleanup complete!"