SHahara. Shell script sandbox for VirtualBox. Basically just a wrapper for VBoxManage snapshot.

gistfile1.sh

#!/bin/sh
# SHahara
# Inspired by: https://github.com/jedi4ever/sahara
#
# Sandbox for virtualbox for shell scripts
# Wrapper for VBoxManage and snapshots

SH_TEST_SNAPSHOT=sh_test_snapshot
VBOX=VBoxManage

removeSnapshot() {
    local VM_NAME="$1"

    VM_KEY=`VBoxManage list vms | grep $VM_NAME | awk '{print $2}'`
    $VBOX snapshot $VM_KEY delete "$SH_TEST_SNAPSHOT" &> /dev/null
}

takeSnapshot() {
    local VM_NAME="$1"

    VM_KEY=`VBoxManage list vms | grep $VM_NAME | awk '{print $2}'`

    local ALREADY_ON=`VBoxManage showvminfo --machinereadable $VM_KEY | grep SnapshotName | grep $SH_TEST_SNAPSHOT`

    if [ -z "$ALREADY_ON" ]; then
        $VBOX snapshot $VM_KEY take "$SH_TEST_SNAPSHOT"
        $VBOX controlvm $VM_KEY resume
    fi
}

restoreSnapshot() {
    $VBOX controlvm $VM_KEY poweroff
    $VBOX snapshot $VM_KEY restore "$SH_TEST_SNAPSHOT"
    $VBOX startvm --type headless $VM_KEY
}

commitSnapshot() {
    local VM_NAME="$1"

    $VBOX controlvm $VM_KEY poweroff
    $VBOX snapshot $VM_KEY delete "$SH_TEST_SNAPSHOT"
    takeSnapshot $VM_NAME && $VBOX startvm --type headless $VM_KEY
}