#!/bin/bash

if [ $# -ne 1 ]; then
    echo "Please provide a starting <date> ('2 weeks ago', '2017-04-04')"
    exit 1
fi

git log --shortstat --since "$1" | awk ' \
    /^ [0-9]/ { c += 1; f += $1; i += $4; d += $6 } \
    END { printf("We pushed __%d commits__ to develop. __🔸%d files__ have changed and there have been __🔹%d insertions__ and __🔻%d deletions__.", c, f, i, d) } \
'