Extract a a git-log for each month

gitlog.sh

#/bin/bash

year=2011

function header {
  begin='Tätigkeiten '
  case $1 in
    1) month='Januar ';;
    2) month='Februar ';;
    3) month='März ';;
    4) month='April ';;
    5) month='Mai ';;
    6) month='Juni ';;
    7) month='Juli ';;
    8) month='August ';;
    9) month='September ';;
    10) month='Oktober ';;
    11) month='November ';;
    12) month='Dezember ';;
  esac
  echo $begin$month$year
  echo "\n"
}

for month in {1..12}
do
  git log \
    --since=$year-$month-01 \
    --until=$year-$month-31 \
    --author='mikezter' \
    --no-merges \
    --date-order  \
    --reverse \
    --abbrev-commit \
    --date=local \
    --date=short \
    --pretty='format:%ad %s' \
    --all > gitlog-$year-$month
    echo `header $month` | cat - gitlog-$year-$month > /tmp/out && mv /tmp/out gitlog-$year-$month.txt
  
done