nukeb2d

#!/bin/bash

# Copyright (c) 2014-2015 by Cosmify, Inc.  All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:
# 
# Redistributions of source code must retain the above copyright notice, this list
# of conditions and the following disclaimer. Redistributions in binary form must
# reproduce the above copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided with the
# distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
# CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
# IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
# OF SUCH DAMAGE.


# *** Symbolic constants ***

B2D_APP="/Applications/boot2docker.app"
B2D_BIN="/usr/local/bin/boot2docker"

COSMIFY_DOCUMENTS_DIR="$HOME/Documents/cosmify-data"


# *** functions ***

function die {
    printf "fatal: %s\n\n" "$1" 1>&2
    exit "$2"
} # die


function warn {
    printf "warning: %s\n" "$1" 1>&2
} # warn


function assertValidHostOS {
    [[ "Linux" == $(uname) ]] && die "this process is intended only for OS X and Windows execution" 1
    [[ "Darwin" == $(uname) ]] || die "Windows support is not implemented yet" 4
} # assertValidHostOS


function b2dDetection {
    [[ -e "$B2D_BIN"  ]] || die "$B2D_BIN not found; nothing to do" 2
    [[ -e "$B2D_APP" ]] || die "$B2D_APP not found; nothing to do" 3
} # b2dDetection


function b2dMustBeRunning {
    local status=$("$B2D_BIN" status)

    if  [[ $("$B2D_BIN" status) != "running" ]]
    then
        echo "$B2D_BIN must be running before nuking the environment to validate the set up."
        "$B2D_BIN" up
    fi
} # b2dMustBeRunning


function sudoNotification {
    clear
    cat << EOF
         *******************************
        * DANGER, DANGER WILL ROBINSON! *
         *******************************

+=============================================+
| nukeb2d - Nuke boot2docker from your system |
|                                             |
|    (c) Copyright 2015 by Cosmify, Inc.      |
+=============================================+

This process will remove boot2docker, the docker tools, and any docker
images that might be installed in your home directory.

The system will ask for an administrator password after it starts.
This is normal.  Please provide the password when prompted.

All running containers will terminate before deletion to prevent loss
of data stored in this host.

All images in the local cache will be removed.  This may take several
minutes.

EOF

    local answer=""
    read -p "Do you want to continue yes/no? " answer
    echo ""

    if [[ "yes" != "$answer" ]]
    then
        echo "continue = $answer - $0 ended without errors, no files"
        echo "were deleted from  your system."
        exit 0
    fi
} # sudoNotification


function nukeEnvironmentVariables {
    # Variables may be defined in .bash_profile or in an include
    # file .boot2docker_cosmify_profile

    local profile="$HOME/.bash_profile"
    local tempFile="/tmp/$(whoami)_profile"

    if [[ -e "$profile" ]]
    then
        awk -v "cosmicDockerProfile=$includeProfile" '!/ DOCKER_/' "$profile" > "$tempFile"
        mv "$tempFile" "$profile"
    fi
} # nukeEnvironmentVariables


function boot2dockerIsRunning {
    echo $(boot2docker status)
} # boot2dockerIsRunning


function nukeRunningContainers {
    echo "Removing all existing and/or running containers:"
    docker ps -a | awk 'NR > 1 { system(sprintf("docker rm -f %s", $NF)); }'

    [[ "$?" == "0" ]] || die "Error removing containers" 5

    echo "All containers removed"
} # nukeRunningContainers


function nukeAllImages {
    echo "Removing all existing images:"
    docker images -a | awk 'NR > 1 { system(sprintf("docker rmi -f %s", $3)); }'

    [[ "$?" == "0" ]] || die "Error removing images" 6

    echo "All images removed"
} # nukeAllImages


function nukeVMImage {
    echo "removing boot2docker VirtualBox image"
    boot2docker delete
    echo "boot2docker VirtualBox image removed"
} # nukeVMImage


function nukeCosmifyDocuments {
    if [[ -d "$COSMIFY_DOCUMENTS_DIR" ]]
    then
        echo "removing the contents of $COSMIFY_DOCUMENTS_DIR"
        rm -Rfv "$COSMIFY_DOCUMENTS_DIR"
        echo "$COSMIFY_DOCUMENTS_DIR contents removed"
    fi
} # nukeCosmifyDocuments


function nukeExecutables {
    local dockerExecutable="/usr/local/bin/docker"

    echo "Nuking executables (be ready to provide the Admin password)"

    sudo rm -vf "$dockerExecutable"
    sudo rm -vf "$B2D_BIN"
    sudo rm -Rvf "/usr/local/share/boot2docker"
    sudo rm -Rvf "$B2D_APP"

    rm -Rvf "$HOME/.boot2docker"
    rm -vf $HOME/.ssh/id_boot2docker*
} # nukeExecutables


# *** main ***

export DOCKER_CERT_PATH=$HOME/.boot2docker/certs/boot2docker-vm
if [[ -d "$DOCKER_CERT_PATH" ]]
then
    servicePort=2376
else
    servicePort=2375
fi

export DOCKER_HOST=tcp://$(boot2docker ip 2> /dev/null):"$servicePort"
export DOCKER_TLS_VERIFY=1

assertValidHostOS
b2dDetection
b2dMustBeRunning
sudoNotification
nukeEnvironmentVariables

if [[ "running" == $(boot2dockerIsRunning) ]]
then
    nukeRunningContainers
    nukeAllImages
    boot2docker stop
fi

nukeCosmifyDocuments
nukeVMImage
nukeExecutables