sync.sh:

#!/bin/sh

BASE=/home/dermoth/DEV/src/Nagios/repo.or.cz/master
LOCKFILE=$BASE/sync.lck
LOGFILE=$BASE/sync.log

exec >>$LOGFILE 2>&1

if [ -e $LOCKFILE ]; then
    if kill -0 `cat $LOCKFILE`; then
        echo "Nagios sync already running! BAILING OUT!"
        echo "If you received this message in error please remove '$LOCKFILE'."
        exit 1
    else
        rm -f $LOCKFILE
        echo "Removed stale pid file!"
    fi
fi
echo $$ >$LOCKFILE

cd $BASE/nagios && \
  git checkout master && \
    git svn fetch --all && \
    $BASE/git-svn-branch.sh && \
    $BASE/git-svn-tag.sh && \
    git push && \
    echo "Sync successfully completed on `date`"

rm -f $LOCKFILE

git-svn-branch.sh:

#!/bin/bash

set -eu

for i in .git/svn/refs/remotes/*; do
    bname=$(basename $i)
    [ $bname == trunk ] && continue
  git branch -r |grep -Eq '[[:space:]]*'$bname'[[:space:]]*$' || continue
  created=0
    git branch -l |grep -Eq '[[:space:]]*'$bname'[[:space:]]*$' && created=1
    if [ $created -eq 0 ]
    then
        git checkout remotes/$bname || continue
        git checkout -b $bname
    else
        git checkout $bname
    fi
    echo Checked-out $bname
    git svn rebase -l
    echo Updated $bname
done

git checkout master
echo Checked-out master
git svn rebase -l
echo Updated master

git-svn-tag.sh:

#!/bin/bash

set -eu

for i in .git/svn/refs/remotes/tags/*; do
    tagname=$(basename $i)
  [ -e .git/refs/tags/$tagname ] && continue
    git checkout remotes/tags/$tagname || continue
    echo Checked-out $tagname
    date=$(git log|head|egrep '^Date:'|cut -d: -f2-|sed 's/ +0000$//')
    git_date=$(TZ=+0000 date -d "$date" "+%Y-%m-%d %H:%M:%S")
    TZ=+0000 GIT_COMMITTER_DATE=$git_date git tag -a -m "$tagname" $tagname || continue
    echo Tagged $tagname back in $git_date
done

git checkout master