a quick one off bash script to total hours in commit messages matching Time: [1.5] pattern per user

gittime.sh

#!/usr/bin/env bash
OIFS=$IFS;
IFS=$'\n';
TAGS=$(git log --tags --simplify-by-decoration --pretty="format:%ci %d" | grep -o "\(tag:\s[v0-9\.]*\)" | sed "s/tag: //g")
CONTRIBUTORS=$(git shortlog -e -s | grep -o "<.*>"| sed 's/[<>]//g');

OUTPUT=()
HEADER=("CONTRIBUTORS")
for name in $CONTRIBUTORS
do
  HEADER=$(echo $HEADER $'\t' $name)
done
OUTPUT+=($HEADER)

last=""
for tag in $TAGS
do
  tagline="$tag"
  for name in $CONTRIBUTORS
  do
    CONTRIB=$(git log $tag..$last --author=$name --grep="^Time:" | grep -o "\[.*\]" | sed 's/\[//g' | sed 's/\]//g')
    TOTAL=0
    for time in $CONTRIB
    do
      TOTAL=$(echo "$TOTAL+$time" | bc)
    done;
    tagline=$(echo $tagline $'\t' $TOTAL)

  done
  last=$tag
  OUTPUT+=($tagline)
done

totalline="TOTAL"
for name in $CONTRIBUTORS
do
  CONTRIB=$(git log --author=$name --grep="^Time:" | grep -o "\[.*\]" | sed 's/\[//g' | sed 's/\]//g')
  TOTAL=0
  for time in $CONTRIB
  do
    TOTAL=$(echo "$TOTAL+$time" | bc)
  done;
  totalline=$(echo $totalline $'\t' $TOTAL)
done;
OUTPUT+=($totalline)

for line in ${OUTPUT[@]}
do
  echo $line
done | column -t -s $'\t'

IFS=$OIFS