update-git-repos.sh

#!/bin/sh
#
# Update all the git repositories under a directory.
#
################
# ToDo:  handle multiple remotes?

################
#
# If script is placed in your $PATH, then hardcode REPODIR,
# or just drop it in the desired REPODIR (good for updating a specific REPODIR).
#
#REPODIR=~/git/
REPODIR="$( dirname $0 )"
if [ ! -d $REPODIR ]; then
  echo "$REPODIR not found.."
  exit 1
fi

################
#
# Find all the git repositories under REPODIR.
#
REPOSITORIES=$( find ${REPODIR} -maxdepth 1 -mindepth 1 -exec test -d {}/.git \; -print -prune | sort )
if [ -z "${REPOSITORIES}" ]; then
  echo "No git repositories found in ${REPODIR}.."
  exit 1
fi

################
################

co_pull () {
  # check out each locally tracked branch and pull
  for branch in $( git for-each-ref --format='%(refname:short)' refs/heads/ ); do
    git checkout ${branch}
    git pull
    git fetch --tags
  done
  # prune branches that were deleted from the remote
  git remote prune origin
  # set CLEAN="true" in env to git clean
  if [ "${CLEAN}" = "true" ]; then
    git clean -xdf
  fi
}

for repo in ${REPOSITORIES}; do
  (
    cd ${repo}
    echo "=== Updating ${repo} ==="
    co_pull
  )
done