git-mirror

#!/bin/bash
#
# Git-Mirror - Gets latest updates for all git clones in a directory
# David Mcanulty 2013
#
# Requires: Cron - for updates
#            git - for doing git operations
#
#  To start Mirroring a new GIT repo:
#    cd /your/toplevel/git/dir
#    git clone --mirror git@github.com:YOURGITNAME/REPONAME
#
# Example cron entry for keeping mirrors up to date once a day:
#   23 4 * * * /usr/local/bin/git-mirror /home/yourname/gitmirrors/ >>/var/log/git-mirror.log 2>&1
#
mirror_dir=$1
exitcode=0
if [[ ! -d "${mirror_dir}" ]] || [[ -z "${mirror_dir}" ]] ;then
   echo "(${mirror_dir}) is empty or not a directory"
   echo "This script requires a directory to mirror within"
   echo "for example: /home/yourname/gitmirrors/"
   exit 1
fi

# Optional user run protection, uncomment and put user of your choice
#if [[ $(whoami) == "root" ]] ;then
#  echo "You must not run this script as root"
#  exit 1
#fi

# Loop over directories in $mirror_dir and
# if they are valid git mirrors (have a 'HEAD' file in them).
# update them with git remote update
echo "reading directories from ${mirror_dir} at $(date)"
while IFS= read -r gitdir; do
   # Check that this is a valid git mirror directory
   if [[ -s "$gitdir/HEAD" ]] ;then
      if git --git-dir ${gitdir} remote update ;then
         echo "Successfully mirrored: $gitdir at $(date)"
      else
         echo "git mirror failed on ${gitdir} with error code $?"
         exitcode+=1
      fi
   else
      echo "no HEAD found in ${gitdir}, perhaps this isn't a git directory?"
      exitcode+=1
   fi
done < <(find "${mirror_dir}" -maxdepth 1 -mindepth 1 -type d -print)

exit ${exitcode}