#!/bin/sh
#
# get-authors
# Morgan Deters <mdeters@cs.nyu.edu> for CVC4
# Copyright (c) 2009-2013  The CVC4 Project
#
# usage: get-authors [ files... ]
#
# This script uses git to get the original author
#

gituser="`git config user.name` <`git config user.email`>"

if [ "$1" = "--email" ]; then
  strip_email=cat
  shift
else
  strip_email="sed 's, *<[^>]*@[^>]*>,,g'"
fi

while [ $# -gt 0 ]; do
  f=$1
  shift
  original_author=
  major_contributors=
  minor_contributors=
  total_lines=`wc -l "$f" | awk '{print$1}'`
  original_author=`git log --use-mailmap --pretty="format:%aN <%aE>" "$f" | tail -1`
  git blame --incremental "$f" | gawk '/^[0-9a-f]+ [0-9]+ [0-9]+ [0-9]+$/ {nl=$4;} /^author / {$1=""; author=$0;} /^author-mail / {mail=$2} /^filename / {while(nl--) {print author,mail}}' | sed "s,Not Committed Yet <not.committed.yet>,$gituser," | sort | uniq -c | sort -n |
    ( while read lines author; do
        pct=$((100*$lines/$total_lines))
        if [ "$author" != "$original_author" ]; then
          if [ $pct -ge 10 ]; then
            major_contributors="${major_contributors:+$major_contributors, }$author"
          else
            minor_contributors="${minor_contributors:+$minor_contributors, }$author"
          fi
        fi
      done; \
      echo "$original_author"
      echo "${major_contributors:-none}"
      echo "${minor_contributors:-none}" ) | eval "$strip_email"
done