#!/bin/sh
#
# server-gc -- Run git-gc on each git repository found within the provided
# filesystem directory tree.  Useful for shared on-server repos that don't
# automatically do gc operations.  This script was first posted at
# http://groups.google.com/group/repo-discuss/web/repository-repacking
#
# NOTE: THIS UTILITY DOES NOT REALLY APPEAR TO BE NEEDED.

if [ $(whoami) != "root" ]; then
    echo "usage: $0 must be ran as root" >&2
    exit 1
fi

TOP=$1
if [ ! -d "$TOP" ]; then
    echo "usage: $0 <topdir>>" >&2
    exit 1
fi

cd $TOP
for p in $(find . -type d -name \*.git | sed 's,^./,,')
do
  d=$TOP/$p
  echo
  echo "*** Repository $d ***"

  git --git-dir=$d config repack.usedeltabaseoffset true
  git --git-dir=$d config pack.compression 9
  git --git-dir=$d config pack.indexversion 2

  git --git-dir=$d config gc.autopacklimit 4
  git --git-dir=$d config gc.packrefs true
  git --git-dir=$d config gc.reflogexpire never
  git --git-dir=$d config gc.reflogexpireunreachable never

  case $p in
  kernel/lk.git)
    : use defaults
    ;;
  kernel/*)
    git --git-dir=$d config pack.threads  6
    git --git-dir=$d config pack.window 250
    git --git-dir=$d config pack.depth   50
    ;;
  esac

  rm -rf $d/logs/refs/changes 2>/dev/null

  git --git-dir=$d gc --auto --aggressive --prune || break

  (find $d/refs/changes -type d | xargs rmdir;
   find $d/refs/changes -type d | xargs rmdir
  ) 2>/dev/null
done