Runs any Vagrant command against multiple Vagrant boxes in parallel.

vagrant-parallel.sh

#!/bin/bash

### DEFAULT ARGUMENTS ###
ARGS=()
VAGRANT_ARGS=()
DEBUG=false

USAGE="
Usage: $0 [OPTIONS] [VAGRANT_COMMAND] [VAGRANT_BOX]...

Runs VAGRANT_COMMAND against all specified boxes in parallel.

Options:
  -d|-debug     Run the script in debug mode.
  -h|--help     Print this help dialogue.

Vagrant options:
  --varg[-|--][ARG] [VALUE]   Use the specified argument-value pair when
                              running the vagrant command.
  --vflag[-|--][FLAG]         Use the specified flag when running the vagrant
                              command.
Examples:

  vagrant ssh -c 'sudo puppet agent -t' box1 box2
  $0 ssh --varg-c 'sudo puppet agent -t' box1 box2

  vagrant up --provision box1 box2
  $0 up --vflag--provision box1 box2

  vagrant destroy -f box1 box2
  $0 destroy --vflag-f box1 box2
"

function getArgs() {
    while [[ $# -gt 0 ]]; do
        if [[ "$1" == --* ]]; then
            setOption ${1:2:${#1}} "$2" || shift
        elif [[ "$1" == -* ]]; then
            for (( i=1; i<${#1}; i++ )); do
                setOption ${1:$i:1}
            done
        else
            ARGS+=("$1")
        fi

        shift
    done
}

function setOption() {
    case "$1" in
        d|debug)
            set -x
            DEBUG=true
        ;;
        h|help)
            echo "$USAGE"
            exit
        ;;
        varg-*)
            VAGRANT_ARGS+=("${1:4:${#1}}")
            VAGRANT_ARGS+=("$2")
            return 1 # indicates $2 was also used
        ;;
        vflag-*)
            VAGRANT_ARGS+=("${1:5:${#1}}")
        ;;
        *)
            # unknown option
            error "$USAGE"
            fatal "Argument '$1' does not exist."
        ;;
    esac
}

function error() {
    echo -e "$1" >&2
}

function fatal() {
    error "FATAL: $1 Exiting..."
    exit 1
}

getArgs "$@"

PIDS=()

for box in ${ARGS[@]:1}; do
    ( vagrant "${ARGS[0]}" "${VAGRANT_ARGS[@]}" "$box" \
        > >(awk "{print \"[$box] \" \$0}") \
        2> >(awk "{print \"[$box] \" \$0 > \"/dev/stderr\"}")
    ) & PIDS+=($!)
done

trap '' INT TERM # ensure signals are passed to sub-processes
wait "${PIDS[@]}"