Migrate all installed packages between debian based machines.

debmigrate

#!/bin/bash
#
# Author: Benjamin H. Graham (me@bman.io)
# Copyright: 2015 Administr8 (http://administr8.me)
# License : GNU GPL v2 (http://www.gnu.org/licenses/gpl-2.0.html)

# dump packages to pastebin, return hash
# restore packages from pastebin with hash input

VERSION="1.0.0";
SCRIPT="debmigrate";
DESC="Dump currently installed packages to pastebin and install from a pastebin list by hash."

# Help text
if [ "$1" == "-h" ] || [ "$1" == "--help" ] || [ "$1" == "-?" ]; then
        echo $DESC;
        echo "Usage: `basename $0` -?|-h|--help (this screen)";
        echo "Usage: `basename $0` (backup)";
        echo "Usage: `basename $0` <hash> (restore)";
        exit 0;
fi;

# Functions
confirm () {
        # call with a prompt string or use a default
        # confirm <prompt string> && <command>
        # confirm && <command>
        # prompts to confirm prior to running given command
        read -r -p "${1:-Are you sure? [y/N]} " response
        case $response in
                [yY][eE][sS]|[yY]) 
                        true
                        ;;
                *)
                        false
                        ;;
        esac
}
jsonval () {
        # json="<json>" prop="<property>" jsonval
        # returns value of a json property given
        local temp=$(echo $json | sed 's/\\\\\//\//g' | sed 's/[{}]//g' | awk -v k="text" '{n=split($0,a,","); for (i=1; i<=n; i++) print a[i]}' | sed 's/\"\:\"/\|/g' | sed 's/[\,]/ /g' | sed 's/\"//g' | grep -w $prop | cut -d":" -f2 | sed -e 's/^ *//g' -e 's/*$//g');
        echo ${temp##*|};
}
 postbin () {
        # postbin <text>
        # returns pastebin url
        local text_in="${1}";
        json=$(curl -s -X POST --data-urlencode "pasteEnter=$text_in" http://a8.lc/bin/api);
        prop='id' jsonval;
}

# Main Routine
if [ -z "$1" ]; then
        # No argument supplied, creating new pastebin entry with currently installed packages.
        installed_packages=$(dpkg --get-selections);
        myid=$(postbin "$installed_packages");
        echo '
                Your packages list has been saved for restoration, but will expire in 7 days.
                Verify the list accuracy by going to http://a8.lc/bin/'"$myid"' prior to restoring
                To restore on the target machine, just run "debmigrate '"$myid"'"
        ';
else
        # Pastebin hash supplied as argument.
        package_list=$(curl -s a8.lc/bin/"$1"@raw);
        echo ''"$package_list"'
        
                REQUIRES root or sudo, WARNING this will install the listed packages.
        ';

        # Check if currently root user, use sudo if not.
        SUDO=''
        if (( $EUID != 0 )); then
                SUDO='sudo'
        fi

        # Set the selections to install.
        echo "$package_list" | $SUDO dpkg --set-selections;

        # Confirm and install packages.
        confirm && $SUDO apt-get -y dselect-upgrade;
fi;