loopback for inigo

gistfile1.txt

#!/bin/bash

set -e -x

apt-get install aufs-tools

pushd $GOPATH_ROOT/src/github.com/cloudfoundry-incubator/warden-linux
  make # compile wshd/etc.
  export WARDEN_BINPATH=$PWD/linux_backend/bin
popd

go install github.com/onsi/ginkgo/ginkgo

export WARDEN_ROOTFS=/opt/warden/rootfs

# used for routing to apps; same logic that Warden uses.
export EXTERNAL_ADDRESS=$(ip route get 8.8.8.8 | sed 's/.*src\s\(.*\)\s/\1/;tx;d;:x')
#mount -t tmpfs -o size=2G none /tmp/warden-tmp

# WARDEN_GRAPH_PATH is the root of the docker image filesystem
export WARDEN_GRAPH_PATH=/tmp/warden-tmp

# create and mount WARDEN_GRAPH_PATH as a loopback device so pivot_root works properly
mkdir -p $WARDEN_GRAPH_PATH
warden_graph_loopback="$WARDEN_GRAPH_PATH.img"
dd if=/dev/null of=$warden_graph_loopback bs=1M seek=6000 1> /dev/null 2> /dev/null
mkfs.ext4 -b 4096 -q -F -O ^has_journal,uninit_bg $warden_graph_loopback
losetup --all | grep $warden_graph_loopback | cut --delimiter=: --fields=1 | xargs --no-run-if-empty --max-args=1 losetup --detach
losetup --find $warden_graph_loopback
graph_loop_device=$(losetup --all | grep $warden_graph_loopback | cut --delimiter=: --fields=1)
mount $graph_loop_device $WARDEN_GRAPH_PATH

color_flag=""
if [ -n "$GO_PIPELINE_COUNTER" ]; then
  color_flag="-noColor"
fi

nodes_flag=""
if [ "$GINKGO_PARALLEL" = "true" ]; then
  nodes_flag="-nodes=4"
fi

pushd $GOPATH_ROOT/src/github.com/cloudfoundry-incubator/inigo
  ginkgo $color_flag $nodes_flag -r -failOnPending -randomizeAllSpecs -trace -race -slowSpecThreshold=10 "$@"
popd

# unmount and delete warden graph fs
umount $WARDEN_GRAPH_PATH
losetup --all | grep $warden_graph_loopback | cut --delimiter=: --fields=1 | xargs --no-run-if-empty --max-args=1 losetup --detach
rm $warden_graph_loopback