git contribution

#!/bin/bash

# Get list of all authors in the repository (master branch only)
authors=$(git log master --format='%ae' | sort -u)

printf "%-25s %-12s %-12s %-12s\n" "Author" "Added" "Removed" "Total"
printf "%-25s %-12s %-12s %-12s\n" "$(printf '%.0s-' {1..25})" "$(printf '%.0s-' {1..12})" "$(printf '%.0s-' {1..12})" "$(printf '%.0s-' {1..12})"

# Loop through each author and calculate their stats on master branch
for author in $authors; do
  stats=$(git log master --author="$author" --pretty=tformat: --numstat | 
    awk '{ add += $1; subs += $2 } END { printf "%d %d %d", add, subs, add-subs }')
  
  if [ ! -z "$stats" ]; then
    name=$(git log master --author="$author" --format='%an' | head -n 1)
    read -r added removed total <<< "$stats"
    
    # Determine prefix based on total
    if [ "$total" -gt 0 ]; then
      prefix="Added"
    elif [ "$total" -lt 0 ]; then
      prefix="Removed"
    else
      prefix="Modified"
    fi
    
    printf "%-25s %-12s %-12s %-12s %s\n" "${name:0:25}" "$added" "$removed" "$total" "$prefix"
  fi
done