#!/bin/bash

BASE=/srv/repositories

# silence pushd/popd
pushd () {
    command pushd "$@" > /dev/null
}

popd () {
    command popd "$@" > /dev/null
}

for repo in $(find $BASE -type d -name "*.git" | grep -v /people/);
do
    pushd $repo
    # the gc.log is a copy of the stderr created by a backgrounded
    # gc process.  It will block further git operations until removed
    # but we need a chance to at least look at what it's complaining
    # about first.
    if [ -f gc.log ];
    then
        echo "WARNING: found ${repo}/gc.log"
        cat ${repo}/gc.log
        rm -f ${repo}/gc.log
    fi

    # check for dangling commits and orphans
    if [ ! -z "$(git fsck --connectivity-only --no-progress)" ];
    then
        # this causes dangling refs to expire now and prunes
        # them from the object pack.  It's expensive, however,
        # because we end up repacking the object files.
        git reflog expire --expire=now --all
        ionice -c2 -n7 -- git gc --prune=now --aggressive >/dev/null
    else
        ionice -c2 -n7 -- git gc --auto > /dev/null
    fi
done