Stale branch cleanup script

delete_repo.sh

#!/bin/bash

# Script to delete merged remote branches except those in the no-delete list
# Usage:
#   ./delete_merged_git.sh [target-branch] [--delete] [--old-days N]
#   Default target branch is "develop"
#   Use --delete to actually delete branches; otherwise it's a dry run
#   Use --old-days N to also delete branches older than N days


TARGET_BRANCH="develop"
PERFORM_DELETE=false
OLD_DAYS=""

for arg in "$@"; do
    if [[ "$arg" == "--delete" ]]; then
        PERFORM_DELETE=true
    elif [[ "$arg" == "--old-days" ]]; then
        # Get the next argument as the number of days
        shift
        OLD_DAYS="$1"
    elif [[ "$arg" != --* ]] && [[ "$arg" != "$OLD_DAYS" ]]; then
        TARGET_BRANCH="$arg"
    fi
done

# Branches to never delete (add your protected branches here)
NO_DELETE_LIST=(
    "main"
    "master" 
    "develop"
    "staging"
    "production"
    "release"
)

# Function to check if branch is older than N days
is_branch_old() {
    local branch="$1"
    local days="$2"
    
    if [ -z "$days" ]; then
        return 1  # Don't consider old if no days specified
    fi
    
    local last_commit_date=$(git log -1 --format="%ct" "origin/$branch" 2>/dev/null)
    if [ -z "$last_commit_date" ]; then
        return 1  # Can't determine age
    fi
    
    local cutoff_date=$(date -d "$days days ago" +%s 2>/dev/null || date -v-${days}d +%s 2>/dev/null)
    [ "$last_commit_date" -lt "$cutoff_date" ]
}

echo "🔍 Finding branches to delete..."
if [ -n "$OLD_DAYS" ]; then
    echo "   - Merged branches in origin/$TARGET_BRANCH"
    echo "   - OR branches older than $OLD_DAYS days"
else
    echo "   - Merged branches in origin/$TARGET_BRANCH"
fi

# Fetch latest remote refs
git fetch origin --prune

# Get list of merged remote branches, excluding HEAD
MERGED_BRANCHES=$(git branch -r --merged origin/$TARGET_BRANCH | grep -v 'origin/HEAD' | sed 's/origin\///' | xargs)

# Get all remote branches if we're checking for old branches
if [ -n "$OLD_DAYS" ]; then
    ALL_BRANCHES=$(git branch -r | grep -v 'origin/HEAD' | sed 's/origin\///' | sed 's/^ *//' | xargs)
fi

echo ""
echo "🗑️  Branches to delete:"

BRANCHES_TO_DELETE=()
PROCESSED_BRANCHES=()

# Process merged branches
for branch in $MERGED_BRANCHES; do
    # Skip if branch is in no-delete list
    if [[ " ${NO_DELETE_LIST[@]} " =~ " ${branch} " ]]; then
        continue
    fi
    
    BRANCHES_TO_DELETE+=("$branch")
    PROCESSED_BRANCHES+=("$branch")
    echo "  - $branch (merged into $TARGET_BRANCH)"
done

# Process old branches if --old-days specified
if [ -n "$OLD_DAYS" ] && [ -n "$ALL_BRANCHES" ]; then
    for branch in $ALL_BRANCHES; do
        # Skip if already processed as merged
        if [[ " ${PROCESSED_BRANCHES[@]} " =~ " ${branch} " ]]; then
            continue
        fi
        
        # Skip if branch is in no-delete list
        if [[ " ${NO_DELETE_LIST[@]} " =~ " ${branch} " ]]; then
            continue
        fi
        
        # Check if old
        if is_branch_old "$branch" "$OLD_DAYS"; then
            BRANCHES_TO_DELETE+=("$branch")
            last_commit=$(git log -1 --format="%ar" "origin/$branch" 2>/dev/null || echo "unknown")
            echo "  - $branch (last commit: $last_commit)"
        fi
    done
fi

if [ ${#BRANCHES_TO_DELETE[@]} -eq 0 ]; then
    echo "✅ No branches to delete (all are protected or don't meet criteria)"
    exit 0
fi

if $PERFORM_DELETE; then
    read -p "⚠️  Really delete these ${#BRANCHES_TO_DELETE[@]} branches? (y/N): " -n 1 -r
    echo
    if [[ $REPLY =~ ^[Yy]$ ]]; then
        echo "🚮 Deleting branches..."
        for branch in "${BRANCHES_TO_DELETE[@]}"; do
            echo "Deleting origin/$branch..."
            git push origin --delete "$branch"
        done
        echo ""
        echo "✅ Deleted ${#BRANCHES_TO_DELETE[@]} branches"
        echo "✅ Done!"
    else
        echo "❌ Cancelled"
    fi
else
    read -p "⚠️[DRY RUN]  Really delete these ${#BRANCHES_TO_DELETE[@]} branches? (y/N): " -n 1 -r
    echo
    for branch in "${BRANCHES_TO_DELETE[@]}"; do
        echo "[DRY RUN] Deleting origin/$branch..."
    done
    
    echo "💡 Dry run: Use '--delete' to actually remove these branches."
    echo "🧪 Nothing was deleted."
fi