apply/apply

#!/bin/bash

set -e
set -u

function usage() {
    echo "usage: $(basename "$0") [-v] [-p] <host> [<host>...]"
    exit 1
}

function host_targets() {
    local host="$*"

    cat < "${APPLY_ROOT}"/"$host" | tr '\n' ' '
}

function push_each() {
    local vflag="$1"
    local parallelize="$2"
    shift
    shift
    if [[ -n $parallelize ]]; then
        # shellcheck disable=SC2086
        parallel -j10 --progress --colsep ' ' ./push $vflag
    else
        # shellcheck disable=SC2086
        parallel -j1 -u --colsep ' ' ./push $vflag
    fi
}

if [[ -z "${APPLY_ROOT:-}" ]]; then
    APPLY_ROOT="."
fi

if [[ $# -lt 1 ]]; then
    usage
fi

if [[ "$1" == "-v" ]]; then
    vflag='-v'
    shift
else
    vflag=''
fi

if [[ "$1" == "-p" ]]; then
    pflag='-p'
    shift
else
    pflag=''
fi

if [[ $# -lt 1 ]]; then
    usage
fi

hosts=()
while [[ $# -gt 0 ]]; do
    hosts+=("$1")
    shift
done

for host in ${hosts[*]}; do
    target=${host#*/}
    # shellcheck disable=SC2046
    echo $(host_targets "$host") root@"$target"
done | push_each "$vflag" "$pflag"