Prune Remote and Local Branches

prune_merged_branches.sh

#!/bin/bash

# Fetch the latest from the remote
git fetch origin

# Get the current branch
current_branch=$(git rev-parse --abbrev-ref HEAD)

echo "Current branch: $current_branch"

# Check if the current branch exists on the remote
if ! git ls-remote --exit-code --heads origin $current_branch > /dev/null 2>&1; then
    echo "Warning: The current branch '$current_branch' doesn't exist on the remote."
    echo "You may need to push this branch first or switch to a branch that exists remotely."
    exit 1
fi

# List of branches to never delete
protected_branches="main master develop staging production"

# Function to filter out protected branches and special refs
filter_branches() {
    while read -r branch; do
        # Remove leading whitespace and "origin/" prefix
        branch_name=$(echo $branch | sed 's/^\s*origin\///' | sed 's/^[[:space:]]*//')
        # Skip HEAD ref and protected branches
        if [[ "$branch_name" != "HEAD "* ]] && ! echo $protected_branches | grep -w -q $branch_name; then
            echo "$branch_name"
        fi
    done
}

# List merged remote branches
echo "Fetching merged remote branches..."
merged_remote_branches=$(git branch -r --merged origin/$current_branch 2>/dev/null | grep -v "^\s*origin/$current_branch$" | filter_branches)

# List merged local branches
echo "Fetching merged local branches..."
merged_local_branches=$(git branch --merged origin/$current_branch | grep -v "^\*" | grep -v "$current_branch" | filter_branches)

if [ -z "$merged_remote_branches" ] && [ -z "$merged_local_branches" ]; then
    echo "No merged branches found."
    exit 0
fi

echo "Merged remote branches (excluding protected branches and HEAD):"
echo "$merged_remote_branches"

echo -e "\nMerged local branches (excluding protected branches):"
echo "$merged_local_branches"

# Ask for confirmation
read -p "Do you want to delete these branches? (y/n): " confirm

if [ "$confirm" != "y" ]; then
    echo "Operation cancelled."
    exit 0
fi

# Delete merged remote branches
if [ -n "$merged_remote_branches" ]; then
    echo "Deleting remote branches..."
    echo "$merged_remote_branches" | while read branch_name; do
        if [ -n "$branch_name" ]; then
            echo "Deleting remote branch: $branch_name"
            git push origin --delete "$branch_name"
        fi
    done
else
    echo "No remote branches to delete."
fi

# Delete merged local branches
if [ -n "$merged_local_branches" ]; then
    echo -e "\nDeleting local branches..."
    echo "$merged_local_branches" | while read branch_name; do
        if [ -n "$branch_name" ]; then
            echo "Deleting local branch: $branch_name"
            git branch -d "$branch_name"
        fi
    done
else
    echo "No local branches to delete."
fi

echo "Cleanup complete."