#!/bin/bash


. /etc/shlib >/dev/null 2>&1 || {
    echo "Error: you don't have kal-shlib-core installed."
    echo ""
    echo "  You might want to add `deb.kalysto.org` deb repository, you'll need root access,"
    echo "  so you might want to run these command after a \`sudo -i\` for instance..."
    echo ""
    echo "     echo deb https://deb.kalysto.org no-dist kal-alpha kal-beta kal-main \\"
    echo "          > /etc/apt/sources.list.d/kalysto.org.list"
    echo "     wget -O - https://deb.kalysto.org/conf/public-key.gpg | apt-key add -"
    echo "     apt-get update -o Dir::Etc::sourcelist=sources.list.d/kalysto.org.list \\"
    echo "         -o Dir::Etc::sourceparts=- -o APT::Get::List-Cleanup=0"
    echo ""
    echo "  Then install package kal-shlib-*:"
    echo ""
    echo "    apt install kal-shlib-{common,cmdline,config,cache,docker,pretty}"
    echo ""
    exit 1
} >&2

include common
include parse
include cmdline
include config
include cache
include fn
include docker


[[ "${BASH_SOURCE[0]}" != "${0}" ]] && SOURCED=true

version=0.1
desc='Install backup'
help=""

version_gt() { test "$(printf '%s\n' "$@" | sort -V | head -n 1)" != "$1"; }


read-0a-err() {
    local ret="$1" eof="" idx=0 last=
    read -r -- "${ret?}" <<<"0"
    shift
    while [ "$1" ]; do
        last=$idx
        read -r -- "$1" || {
            ## Put this last value in ${!ret}
            eof="$1"
            read -r -- "$ret" <<<"${!eof}"
            break
        }
        ((idx++))
        shift
    done
    [ -z "$eof" ] || {
        if [ "$last" != 0 ]; then
            echo "Error: read-0a-err couldn't fill all value" >&2
            read -r -- "$ret" <<<"127"
        else
            if [ -z "${!ret}" ]; then
                echo "Error: last value is not a number, did you finish with an errorlevel ?" >&2
                read -r -- "$ret" <<<"126"
            fi
        fi
        false
    }
}

p-0a-err() {
    "$@"
    echo -n "$?"
}


docker:running-container-projects() {
    :cache: scope=session

    docker ps --format '{{.Label "com.docker.compose.project"}}' | sort | uniq
}
decorator._mangle_fn docker:running-container-projects


ssh:mk-private-key() {
    local host="$1" service_name="$2"
    (
        settmpdir VPS_TMPDIR
        ssh-keygen -t rsa -N "" -f "$VPS_TMPDIR/rsync_rsa" -C "$service_name@$host" >/dev/null
        cat "$VPS_TMPDIR/rsync_rsa"
    )
}


mailcow:has-images-running() {
    local images
    images=$(docker ps --format '{{.Image}}' | sort | uniq)
    [[ $'\n'"$images" == *$'\n'"mailcow/"* ]]
}


mailcow:has-container-project-mentionning-mailcow() {
    local projects
    projects=$(docker:running-container-projects) || return 1
    [[ $'\n'"$projects"$'\n' == *mailcow* ]]
}


mailcow:has-running-containers() {
    mailcow:has-images-running ||
        mailcow:has-container-project-mentionning-mailcow
}


mailcow:get-root() {
    :cache: scope=session

    local dir

    for dir in {/opt{,/apps},/root}/mailcow-dockerized; do
        [ -d "$dir" ] || continue
        [ -r "$dir/mailcow.conf" ] || continue
        echo "$dir"
        return 0
    done
    return 1
}
decorator._mangle_fn mailcow:get-root


compose:get-compose-yml() {
    :cache: scope=session

    local path

    path=$(DEBUG=1 DRY_RUN=1 compose 2>&1 | egrep '^\s+-e HOST_COMPOSE_YML_FILE=' | cut -f 2- -d "=" | cut -f 1 -d " ")

    [ -e "$path" ] || return 1
    echo "$path"
}
decorator._mangle_fn compose:get-compose-yml
export -f compose:get-compose-yml


compose:has-container-project-myc() {
    local projects
    projects=$(docker:running-container-projects) || return 1
    [[ $'\n'"$projects"$'\n' == *$'\n'"myc"$'\n'* ]]
}

compose:service:exists() {
    local project="$1" service="$2" service_cfg
    service_cfg=$(cat "$(compose:get-compose-yml)" |
                       shyaml get-value -y "$service" 2>/dev/null) || return 1
    [ -n "$service_cfg" ]
}

compose:file:value-change() {
    local key="$1" value="$2"
    local compose_yml
    if ! compose_yml=$(compose:get-compose-yml); then
        err "Couldn't locate your 'compose.yml' file."
        return 1
    fi
    yaml:file:value-change "$compose_yml" "$key" "$value" || return 1
}
export -f compose:file:value-change


yaml:file:value-change() {
    local file="$1" key="$2" value="$3" first=1 count=0 diff=""
    (
    cd "${file%/*}"
    while read-0 hunk; do
        if [ -n "$first" ]; then
            diff+="$hunk"
            first=
            continue
        fi
        if [[ "$hunk" =~ $'\n'"+"[[:space:]]+"${key##*.}:" ]]; then
            ((count++))
            diff+="$hunk" >&2
        else
            :
            # echo "discarding:" >&2
            # e "$hunk" | prefix "  | " >&2
        fi
    done < <(
        export DEBUG=
        settmpdir YQ_TEMP
        cp "${file}" "$YQ_TEMP/compose.yml" &&
            yq -i ".${key} = \"${value}\"" "$YQ_TEMP/compose.yml" &&
            sed -ri 's/^([^# ])/\n\0/g' "$YQ_TEMP/compose.yml" &&
            diff -u0 -Z "${file}" "$YQ_TEMP/compose.yml" |
                sed -r "s/^(@@.*)$/\x00\1/g;s%^(\+\+\+) [^\t]+%\1 ${file}%g"
            printf "\0"
    )
    if [[ "$count" == 0 ]]; then
        err "No change made to '$file'."
        return 1
    fi
    if [[ "$count" != 1 ]]; then
        err "compose file change request seems dubious and was refused:"
        e "$diff" | prefix "  | " >&2
        return 1
    fi
    echo Applying: >&2
    e "$diff" | prefix "  | " >&2
    patch <<<"$diff"
    ) || exit 1
}
export -f yaml:file:value-change


type:is-mailcow() {
    mailcow:get-root >/dev/null ||
    mailcow:has-running-containers
}


type:is-compose() {
    compose:get-compose-yml >/dev/null &&
    compose:has-container-project-myc
}


vps:get-type() {

    :cache: scope=session

    local fn
    for fn in $(declare -F | cut -f 3 -d " " | egrep "^type:is-"); do
        "$fn" && {
            echo "${fn#type:is-}"
            return 0
           }
    done
    return 1
}
decorator._mangle_fn vps:get-type


mirror-dir:sources() {
    :cache: scope=session

    if ! shyaml get-values default.sources < /etc/mirror-dir/config.yml; then
        err "Couldn't query 'default.sources' in '/etc/mirror-dir/config.yml'."
        return 1
    fi
}
decorator._mangle_fn mirror-dir:sources


mirror-dir:check-add() {
    local elt="$1" sources
    sources=$(mirror-dir:sources) || return 1
    if [[ $'\n'"$sources"$'\n' ==  *$'\n'"$elt"$'\n'* ]]; then
        info "Volume $elt already in sources"
    else
        Elt "Adding directory $elt"
        sed -i "/sources:/a\  - \"${elt}\"" \
            /etc/mirror-dir/config.yml
        Feedback || return 1
    fi
}


mirror-dir:check-add-vol() {
    local elt="$1"
    mirror-dir:check-add "/var/lib/docker/volumes/*_${elt}-*/_data"
}

## The first colon is to prevent auto-export of function from shlib
: ; bash-bug-5() { { cat; } < <(e) >/dev/null; ! cat "$1"; } && bash-bug-5 <(e) 2>/dev/null &&
    export BASH_BUG_5=1 && unset -f bash_bug_5


wrap() {
    local label="$1" code="$2"
    shift 2
    export VERBOSE=1
    interpreter=/bin/bash
    if [ -n "$BASH_BUG_5" ]; then
        (
            settmpdir tmpdir
            fname=${label##*/}
            e "$code" > "$tmpdir/$fname" &&
                chmod +x "$tmpdir/$fname" &&
                Wrap -vsd "$label" -- "$interpreter" "$tmpdir/$fname" "$@"
        )
    else
        Wrap -vsd "$label" -- "$interpreter" <(e "$code") "$@"
    fi
}


ping_check() {
    #global ignore_ping_check
    local host="$1"

    ip=$(getent ahosts "$host" | egrep "^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+\s+" |
             head -n 1 | cut -f 1 -d " ") || return 1

    my_ip=$(curl -s myip.kal.fr)
    if [ "$ip" != "$my_ip" ]; then
        if [ -n "$ignore_ping_check" ]; then
            warn "IP of '$host' ($ip) doesn't match mine ($my_ip). Ignoring due to ``--ignore-ping-check`` option."
        else
            err "IP of '$host' ($ip) doesn't match mine ($my_ip). Use ``--ignore-ping-check`` to ignore check."
            return 1
        fi
    fi
}


mailcow:install-backup() {

    local BACKUP_SERVER="$1" ignore_ping_check="$2" mailcow_root DOMAIN

    ## find installation
    mailcow_root=$(mailcow:get-root) || {
        err "Couldn't find a valid mailcow root directory."
        return 1
    }

    ## check ok

    DOMAIN=$(cat "$mailcow_root/.env" | grep ^MAILCOW_HOSTNAME= | cut -f 2 -d =) || {
        err "Couldn't find MAILCOW_HOSTNAME in file \"$mailcow_root/.env\"."
        return 1
    }

    ping_check "$DOMAIN" || return 1

    MYSQL_ROOT_PASSWORD=$(cat "$mailcow_root/.env" | grep ^DBROOT= | cut -f 2 -d =) || {
        err "Couldn't find DBROOT in file \"$mailcow_root/.env\"."
        return 1
    }

    if docker compose >/dev/null 2>&1; then
        MYSQL_CONTAINER=${MYSQL_CONTAINER:-mailcowdockerized-mysql-mailcow-1}
    else
        MYSQL_CONTAINER=${MYSQL_CONTAINER:-mailcowdockerized_mysql-mailcow_1}
    fi
    container_id=$(docker ps -f name="$MYSQL_CONTAINER" --format "{{.ID}}")
    if [ -z "$container_id" ]; then
        err "Couldn't find docker container named '$MYSQL_CONTAINER'."
        return 1
    fi

    export KEY_BACKUP_ID="mailcow"
    export MYSQL_ROOT_PASSWORD
    export MYSQL_CONTAINER
    export BACKUP_SERVER
    export DOMAIN

    wrap "Install rsync-backup on host" "
        cd /srv/charm-store/rsync-backup
        bash ./hooks/install.d/60-install.sh
" || return 1

    wrap "Mysql dump install" "
        cd /srv/charm-store/mariadb
        bash ./hooks/install.d/60-backup.sh
" || return 1

    ## Using https://github.com/mailcow/mailcow-dockerized/blob/master/helper-scripts/backup_and_restore.sh
    for elt in "vmail{,-attachments-vol}" crypt redis rspamd postfix; do
        mirror-dir:check-add-vol "$elt" || return 1
    done

    mirror-dir:check-add "$mailcow_root" || return 1
    mirror-dir:check-add "/var/backups/mysql" || return 1
    mirror-dir:check-add "/etc" || return 1


    dest="$BACKUP_SERVER"
    dest="${dest%/*}"
    ssh_options=()
    if [[ "$dest" == *":"* ]]; then
        port="${dest##*:}"
        dest="${dest%%:*}"
        ssh_options=(-p "$port")
    else
        port=""
        dest="${dest%%:*}"
    fi

    info "You can run this following command from an host having admin access to $dest:"
    echo "   (Or send it to a backup admin of $dest)" >&2
    echo "ssh ${ssh_options[@]} myadmin@$dest ssh-key add '$(cat /var/lib/rsync/.ssh/id_rsa.pub)'"
}

compose:has_domain() {
    local compose_file="$1" host="$2" name conf relation relation_value domain server_aliases

    while read-0 name conf ; do
	    name=$(e "$name" | shyaml get-value)
        if [[ "$name" =~ ^[a-zA-Z0-9-]+\.[a-zA-Z0-9-]+ ]]; then
	        [ "$host" == "$name" ] && return 0
	    fi

	    rel=$(e "$conf" | shyaml -y get-value relations 2>/dev/null) || continue
        for relation in web-proxy publish-dir; do
	        relation_value=$(e "$rel" | shyaml -y get-value "$relation" 2>/dev/null) || continue
	        while read-0 label conf_relation; do
		        domain=$(e "$conf_relation" | shyaml get-value "domain" 2>/dev/null) && {
	                [ "$host" == "$domain" ] && return 0
	            }
		        server_aliases=$(e "$conf_relation" | shyaml get-values "server-aliases" 2>/dev/null) && {
	                [[ $'\n'"$server_aliases" == *$'\n'"$host"$'\n'* ]] && return 0
         	    }
	        done < <(e "$relation_value" | shyaml -y key-values-0)
        done
    done < <(shyaml -y key-values-0 < "$compose_file")
    return 1
}


compose:install-backup() {

    local BACKUP_SERVER="$1" service_name="$2" compose_file="$3" ignore_ping_check="$4" ignore_domain_check="$5"

    ## XXXvlab: far from perfect as it mimics and depends internal
    ## logic of current default way to get a domain in compose-core
    host=$(hostname)

    if ! compose:has_domain "$compose_file" "$host"; then
        if [ -n "$ignore_domain_check" ]; then
            warn "domain of '$host' not found in compose file '$compose_file'. Ignoring due to ``--ignore-domain-check`` option."
        else
            err "domain of '$host' not found in compose file '$compose_file'. Use ``--ignore-domain-check`` to ignore check."
            return 1
        fi
    fi

    ping_check "$host" || return 1

    if [ -e "/root/.ssh/rsync_rsa" ]; then
        warn "deleting private key in /root/.ssh/rsync_rsa, has we are not using it anymore."
        rm -fv /root/.ssh/rsync_rsa
    fi
    if [ -e "/root/.ssh/rsync_rsa.pub" ]; then
        warn "deleting public key in /root/.ssh/rsync_rsa.pub, has we are not using it anymore."
        rm -fv /root/.ssh/rsync_rsa.pub
    fi

    if service_cfg=$(cat "$compose_file" |
                         shyaml get-value -y "$service_name" 2>/dev/null); then
        info "Entry for service ${DARKYELLOW}$service_name${NORMAL}" \
             "is already present in '$compose_file'."
        cfg=$(e "$service_cfg" | shyaml get-value -y options) || {
            err "No ${WHITE}options${NORMAL} in ${DARKYELLOW}$service_name${NORMAL}'s" \
                "entry in '$compose_file'."
            return 1
        }
        private_key=$(e "$cfg" | shyaml get-value private-key) || return 1
        target=$(e "$cfg" | shyaml get-value target) || return 1
        if [ "$target" != "$BACKUP_SERVER" ]; then
            err "Existing backup target '$target' is different" \
                "from specified '$BACKUP_SERVER'"
            return 1
        fi
    else
        private_key=$(ssh:mk-private-key "$host" "$service_name")

        cat <<EOF >> "$compose_file"

$service_name:
  options:
    ident: $host
    target: $BACKUP_SERVER
    private-key: |
$(e "$private_key" | sed -r 's/^/      /g')
EOF
    fi


    dest="$BACKUP_SERVER"
    dest="${dest%/*}"
    ssh_options=()
    if [[ "$dest" == *":"* ]]; then
        port="${dest##*:}"
        dest="${dest%%:*}"
        ssh_options=(-p "$port")
    else
        port=""
        dest="${dest%%:*}"
    fi

    info "You can run this following command from an host having admin access to $dest:"
    echo "   (Or send it to a backup admin of $dest)" >&2
    ## We remove ending label (label will be added or not in the
    ## private key, and thus here, depending on the version of
    ## openssh-client)
    public_key=$(ssh-keygen -y -f <(e "$private_key"$'\n') | sed -r 's/ [^ ]+@[^ ]+$//')
    echo "ssh ${ssh_options[@]} myadmin@$dest ssh-key add '$public_key compose@$host'"
}


backup-action() {
    local action="$1"
    shift
    vps_type=$(vps:get-type) || {
        err "Failed to get type of installation."
        return 1
    }
    if ! fn.exists "${vps_type}:${action}"; then
        err "type '${vps_type}' has no ${vps_type}:${action} implemented yet."
        return 1
    fi
    "${vps_type}:${action}" "$@"
}


compose:get_default_backup_host_ident() {
    local service_name="$1"  ## Optional
    local compose_file service_cfg cfg target

    compose_file=$(compose:get-compose-yml)
    service_name="${service_name:-rsync-backup}"
    if ! service_cfg=$(cat "$compose_file" |
                           shyaml get-value -y "$service_name" 2>/dev/null); then
        err "No service named '$service_name' found in 'compose.yml'."
        return 1
    fi
    cfg=$(e "$service_cfg" | shyaml get-value -y options) || {
        err "No ${WHITE}options${NORMAL} in ${DARKYELLOW}$service_name${NORMAL}'s" \
            "entry in '$compose_file'."
        return 1
    }
    if ! target=$(e "$cfg" | shyaml get-value target); then
        err "No ${WHITE}options.target${NORMAL} in ${DARKYELLOW}$service_name${NORMAL}'s" \
            "entry in '$compose_file'."
    fi
    if ! target=$(e "$cfg" | shyaml get-value target); then
        err "No ${WHITE}options.target${NORMAL} in ${DARKYELLOW}$service_name${NORMAL}'s" \
            "entry in '$compose_file'."
    fi
    if ! ident=$(e "$cfg" | shyaml get-value ident); then
        err "No ${WHITE}options.ident${NORMAL} in ${DARKYELLOW}$service_name${NORMAL}'s" \
            "entry in '$compose_file'."
    fi
    echo "$target $ident"
}


mailcow:get_default_backup_host_ident() {
    local content cron_line ident found dest cmd_line
    if ! [ -e "/etc/cron.d/mirror-dir" ]; then
        err "No '/etc/cron.d/mirror-dir' found."
        return 1
    fi
    content=$(cat /etc/cron.d/mirror-dir) || {
        err "Can't read '/etc/cron.d/mirror-dir'."
        return 1
    }
    if ! cron_line=$(e "$content" | grep "mirror-dir backup"); then
        err "Can't find 'mirror-dir backup' line in  '/etc/cron.d/mirror-dir'."
        return 1
    fi

    cron_line=${cron_line%|*}
    cmd_line=(${cron_line#*root})

    found=
    dest=
    for arg in "${cmd_line[@]}"; do
        [ -n "$found" ] && {
            dest="$arg"
            break
        }
        [ "$arg" == "-d" ] && {
            found=1
        }
    done

    if ! [[ "$dest" =~ ^[\'\"a-zA-Z0-9:/.-]+$ ]]; then
        err "Can't find valid destination in 'mirror-dir backup' arguments from '/etc/cron.d/mirror-dir'."
        return 1
    fi

    if [[ "$dest" == \"*\" ]] || [[ "$dest" == \'*\' ]]; then
        ## unquoting, the eval should be safe because of previous check
        dest=$(eval e "$dest")
    fi
    if [ -z "$dest" ]; then
        err "Can't find destination in 'mirror-dir backup' arguments from '/etc/cron.d/mirror-dir'."
        return 1
    fi

    ## looking for ident

    found=
    ident=
    for arg in "${cmd_line[@]}"; do
        [ -n "$found" ] && {
            ident="$arg"
            break
        }
        [ "$arg" == "-h" ] && {
            found=1
        }
    done

    if ! [[ "$ident" =~ ^[\'\"a-zA-Z0-9.-]+$ ]]; then
        err "Can't find valid identifier in 'mirror-dir backup' arguments from '/etc/cron.d/mirror-dir'."
        return 1
    fi

    if [[ "$ident" == \"*\" ]] || [[ "$ident" == \'*\' ]]; then
        ## unquoting, the eval should be safe because of previous check
        ident=$(eval e "$ident")
    fi
    if [ -z "$ident" ]; then
        err "Can't find destination in 'mirror-dir backup' arguments from '/etc/cron.d/mirror-dir'."
        return 1
    fi

    echo "$dest $ident"
}


compose:service:containers() {
    local project="$1" service="$2"

    docker ps \
           --filter label="com.docker.compose.project=$project" \
           --filter label="compose.master-service=$service" \
           --format="{{.ID}}"
}
export -f compose:service:containers


compose:service:container_one() {
    local project="$1" service="$2" container_id
    {
        read-0a container_id || {
            err "service ${DARKYELLOW}$service${NORMAL} has no running container."
            return 1
        }
        if read-0a _; then
            err "service ${DARKYELLOW}$service${NORMAL} has more than one running container."
            return 1
        fi
    } < <(compose:service:containers "$project" "$service")
    echo "$container_id"
}
export -f compose:service:container_one


compose:service:container_first() {
    local project="$1" service="$2" container_id
    {
        read-0a container_id || {
            err "service ${DARKYELLOW}$service${NORMAL} has no running container."
            return 1
        }
        if read-0a _; then
            warn "service ${DARKYELLOW}$service${NORMAL} has more than one running container."
        fi
    } < <(compose:service:containers "$project" "$service")
    echo "$container_id"
}
export -f compose:service:container_first


docker:running_containers() {
    :cache: scope=session

    docker ps --format="{{.ID}}"
}
decorator._mangle_fn docker:running_containers
export -f docker:running_containers


compose:project:containers() {
    local project="$1" opts

    opts+=(--filter label="com.docker.compose.project=$project")
    docker ps "${opts[@]}" \
           --format="{{.ID}}"
}
export -f compose:project:containers


compose:charm:containers() {
    local project="$1" charm="$2"

    docker ps \
           --filter label="com.docker.compose.project=$project" \
           --filter label="compose.charm=$charm" \
           --format="{{.ID}}"
}
export -f compose:charm:containers


compose:charm:container_one() {
    local project="$1" charm="$2" container_id
    {
        read-0a container_id || {
            err "charm ${DARKPINK}$charm${NORMAL} has no running container in project '$project'."
            return 1
        }
        if read-0a _; then
            err "charm ${DARKPINK}$charm${NORMAL} has more than one running container."
            return 1
        fi
    } < <(compose:charm:containers "$project" "$charm")
    echo "$container_id"
}
export -f compose:charm:container_one


compose:charm:container_first() {
    local project="$1" charm="$2" container_id
    {
        read-0a container_id || {
            warn "charm ${DARKYELLOW}$charm${NORMAL} has no running container in project '$project'."
        }
        if read-0a _; then
            warn "charm ${DARKYELLOW}$charm${NORMAL} has more than one running container."
        fi
    } < <(compose:charm:containers "$project" "$charm")
    echo "$container_id"
}
export -f compose:charm:container_first



compose:get_url() {
    local project_name="$1" service="$2"  data_file network ip
    data_dir=("/var/lib/compose/relations/${project_name}/${service}-"*"/web-proxy")
    if [ "${#data_dir[@]}" -gt 1 ]; then
        err "More than one web-proxy relation." \
            "Current 'vps' algorithm is insufficient" \
            "to figure out which relation is concerned"
        return 1
    fi
    data_file="${data_dir[0]}/data"
    if [ -d "${data_file%/*}" ]; then
        (
            set -o pipefail
            ## users can't cat directly the content
            docker run --rm \
                   -v "${data_file%/*}":/tmp/dummy alpine \
                   cat "/tmp/dummy/${data_file##*/}" |
                shyaml get-value url
        )
    else
        ## Assume there are no frontend relation here, the url is direct IP
        container_id=$(compose:service:container_one "${project_name}" "${service}") || return 1
        network_ip=$(docker:container:network_ip_one "${container_id}") || return 1
        IFS=":" read -r network ip <<<"$network_ip"
        tcp_port=
        for port in $(docker:exposed_ports "$container_id"); do
            IFS="/" read port type <<<"$port"
            [ "$type" == "tcp" ] || continue
            tcp_port="$port"
            break
        done

        echo -n "http://$ip"
        [ -n "$tcp_port" ] && echo ":$tcp_port"
    fi || {
        err "Failed querying ${service} to frontend relation to get url."
        return 1
    }
}
export -f compose:get_url


compose:container:service() {
    local container="$1" service
    if ! service=$(docker:container:label "$container" "compose.service"); then
        err "Failed to get service name from container ${container}."
        return 1
    fi
    if [ -z "$service" ]; then
        err "No service found for container ${container}."
        return 1
    fi
    echo "$service"
}
export -f compose:container:service

compose:psql() {
    local project_name="$1" dbname="$2" container_id
    shift 2
    container_id=$(compose:charm:container_one "$project_name" "postgres") || return 1
    docker exec -i "${container_id}" psql -U postgres "$dbname" "$@"
}
export -f compose:psql

compose:mongo() {
    local project_name="$1" dbname="$2" container_id
    container_id=$(compose:charm:container_one "$project_name" "mongo") || return 1
    docker exec -i "${container_id}" mongo --quiet "$dbname"
}
export -f compose:mongo


compose:pgm() {
    local project_name="$1" container_network_ip container_ip container_network
    shift

    container_id=$(compose:charm:container_one "$project_name" "postgres") || return 1
    service_name=$(compose:container:service "$container_id") || return 1
    image_id=$(docker:container:image "$container_id") || return 1
    container_network_ip=$(docker:container:network_ip_one "$container_id") || return 1
    IFS=":" read -r container_network container_ip <<<"$container_network_ip"

    pgpass="/srv/datastore/data/${service_name}/var/lib/postgresql/data/pgpass"

    local final_pgm_docker_run_opts+=(
        -u 0 -e prefix_pg_local_command=" "
        --network "${container_network}"
        -e PGHOST="$container_ip"
        -e PGUSER=postgres
        -v "$pgpass:/root/.pgpass"
        "${pgm_docker_run_opts[@]}"
    )

    cmd=(docker run --rm  \
           "${final_pgm_docker_run_opts[@]}" \
           "${image_id}" pgm "$@"
        )
    echo "${cmd[@]}"
    "${cmd[@]}"
}
export -f compose:pgm


postgres:dump() {
    local project_name="$1" src="$2" dst="$3"

    (
        settmpdir PGM_TMP_LOCATION

        pgm_docker_run_opts=('-v' "${PGM_TMP_LOCATION}:/tmp/dump")
        compose:pgm "$project_name" cp -f "$src" "/tmp/dump/dump.gz" &&
        mv "$PGM_TMP_LOCATION/dump.gz" "$dst"
    ) || return 1
}
export -f postgres:dump


postgres:restore() {
    local project_name="$1" src="$2" dst="$3"

    full_src_path=$(readlink -e "$src") || exit 1
    (
        pgm_docker_run_opts=('-v' "${full_src_path}:/tmp/dump.gz")
        compose:pgm "$project_name" cp -f "/tmp/dump.gz" "$dst"
    ) || return 1
}
export -f postgres:restore


odoo:get_public_user_id() {
    local project_name="$1" dbname="$2"
    echo "select res_id from ir_model_data where model = 'res.users' and name = 'public_user';" |
        compose:psql "$project_name" "$dbname" -qAt
}


cyclos:set_root_url() {
    local project_name="$1" dbname="$2" url="$3"

    echo "UPDATE configurations SET root_url = '$url';" |
        compose:psql "$project_name" "$dbname" || {
        err "Failed to set cyclos url value in '$dbname' database."
        return 1
    }
}
export -f cyclos:set_root_url


cyclos:unlock() {
    local project_name="$1" dbname="$2"

    echo "delete from database_lock;" |
        compose:psql "${project_name}" "${dbname}"
}
export -f cyclos:unlock


rocketchat:drop-indexes() {
    local project_name="$1" dbname="$2"

    echo "db.users.dropIndexes()" |
        compose:mongo "${project_name}" "${dbname}"
}
export -f rocketchat:drop-indexes


compose:project_name() {
    if [ -z  "$PROJECT_NAME" ]; then
        PROJECT_NAME=$(compose --get-project-name) || {
            err "Couldn't get project name."
            return 1
        }
        if [ -z "$PROJECT_NAME" -o "$PROJECT_NAME" == "orphan" ]; then
            err "Couldn't get project name, probably because 'compose.yml' wasn't found."
            echo "  Please ensure to either configure a global 'compose.yml' or run this command" >&2
            echo "  in a compose project (with 'compose.yml' on the top level directory)." >&2
            return 1
        fi
        export PROJECT_NAME
    fi
    echo "$PROJECT_NAME"
}
export -f compose:project_name


compose:get_cron_docker_cmd() {
    local cron_line cmd_line docker_cmd
    project_name=$(compose:project_name) || return 1

    if ! cron_line=$(docker exec "${project_name}"_cron_1 cat /etc/cron.d/rsync-backup | grep "\* \* \*"); then
        err "Can't find cron_line in cron container."
        echo "  Have you forgotten to run 'compose up' ?" >&2
        return 1
    fi

    cron_line=${cron_line%|*}
    cron_line=${cron_line%"2>&1"*}

    cmd_line="${cron_line#*root}"
    eval "args=($cmd_line)"

    ## should be last argument

    docker_cmd=$(echo ${args[@]: -1})

    if ! [[ "$docker_cmd" == "docker run --rm -e "* ]]; then
        echo "docker command found should start with 'docker run'." >&2
        echo "Here's command:" >&2
        echo "  $docker_cmd" >&2
        return 1
    fi

    e "$docker_cmd"
}


compose:recover-target() {
    local backup_host="$1" ident="$2" src="$3" dst="$4" service_name="${5:-rsync-backup}" project_name
    project_name=$(compose:project_name) || return 1

    docker_image="${project_name}_${service_name}"
    if ! docker_has_image "$docker_image"; then
        compose build "${service_name}" || {
            err "Couldn't find nor build image for service '$service_name'."
            return 1
        }
    fi

    dst="${dst%/}"  ## remove final slash

    ssh_options=(-o StrictHostKeyChecking=no)
    if [[ "$backup_host" == *":"* ]]; then
        port="${backup_host##*:}"
        backup_host="${backup_host%%:*}"
        ssh_options+=(-p "$port")
    else
        port=""
        backup_host="${backup_host%%:*}"
    fi

    rsync_opts=(
        -e "ssh ${ssh_options[*]} -i /var/lib/rsync/.ssh/id_rsa -l rsync"
        -azvArH --delete --delete-excluded
        --partial --partial-dir .rsync-partial
        --numeric-ids
    )
    if [ "$DRY_RUN" ]; then
        rsync_opts+=("-n")
    fi
    cmd=(
    docker run --rm --entrypoint rsync \
           -v "/srv/datastore/config/${service_name}/var/lib/rsync":/var/lib/rsync \
           -v "${dst%/*}":/mnt/dest \
           "$docker_image" \
           "${rsync_opts[@]}" "$backup_host":"/var/mirror/$ident/$src" "/mnt/dest/${dst##*/}"
    )
    echo "${WHITE}Launching: ${NORMAL} ${cmd[@]}"
    "${cmd[@]}"
}


mailcow:recover-target() {
    local backup_host="$1" ident="$2" src="$3" dst="$4"

    dst="${dst%/}"  ## remove final slash

    ssh_options=(-o StrictHostKeyChecking=no)
    if [[ "$backup_host" == *":"* ]]; then
        port="${backup_host##*:}"
        backup_host="${backup_host%%:*}"
        ssh_options+=(-p "$port")
    else
        port=""
        backup_host="${backup_host%%:*}"
    fi

    rsync_opts=(
        -e "ssh ${ssh_options[*]} -i /var/lib/rsync/.ssh/id_rsa -l rsync"
        -azvArH --delete --delete-excluded
        --partial --partial-dir .rsync-partial
        --numeric-ids
    )
    if [ "$DRY_RUN" ]; then
        rsync_opts+=("-n")
    fi
    cmd=(
        rsync "${rsync_opts[@]}" "$backup_host":"/var/mirror/$ident/$src" "${dst}"
    )
    echo "${WHITE}Launching: ${NORMAL} ${cmd[@]}"
    "${cmd[@]}"
}


nextcloud:src:version() {
    local version
    if ! version=$(cat "/srv/datastore/data/${nextcloud_service}/var/www/html/version.php" 2>/dev/null); then
        err "Can't find version.php file to get last version installed."
        exit 1
    fi
    version=$(e "$version" | grep 'VersionString =' | cut -f 3 -d ' ' |  cut -f 2 -d "'")
    if [ -z "$version" ]; then
        err "Can't figure out version from version.php content."
        exit 1
    fi
    echo "$version"
}


container:health:check-fix:container-aliveness() {
    local container_id="$1"

    timeout 5s docker inspect "$container_id" >/dev/null 2>&1
    errlvl=$?
    if [ "$errlvl" == 124 ]; then
        service_name=$(docker ps --filter id="$container_id" --format '{{.Label "com.docker.compose.service"}}')
        container_name=($(docker ps --filter id="$container_id" --format '{{.Names}}'))
        pid=$(ps ax -o pid,command -ww | grep docker-containerd-shim |
                  grep "/$container_id" |
                  sed -r 's/^ *//g' |
                  cut -f 1 -d " ")
        if [ -z "$pid" ]; then
            err "container ${DARKCYAN}${container_name[0]}${NORMAL} for ${DARKYELLOW}$service_name${NORMAL} doesn't answer to 'inspect' command. Can't find its PID neither."
            return 1
        fi
        echo "container ${DARKCYAN}${container_name[0]}${NORMAL} for ${DARKYELLOW}$service_name${NORMAL} doesn't answer to 'inspect' command (pid: $pid)."
        Wrap -d "kill pid $pid and restart" <<EOF
kill "$pid"
sleep 2
docker restart "$container_id"
EOF
    fi
    return $errlvl
}


container:health:check-fix:no-matching-entries() {
    local container_id="$1"

    out=$(docker exec "$container_id" echo 2>&1)
    errlvl=$?
    [ "$errlvl" == 0 ] && return 0
    service_name=$(docker ps --filter id="$container_id" --format '{{.Label "com.docker.compose.service"}}')
    container_name=($(docker ps --filter id="$container_id" --format '{{.Names}}'))
    if [ "$errlvl" == 126 ] && [[ "$out" == *"no matching entries in passwd file"* ]]; then
        echo "container ${DARKCYAN}${container_name[0]}${NORMAL} for ${DARKYELLOW}$service_name${NORMAL} has ${DARKRED}no-matching-entries${NORMAL} bug." >&2
        Wrap -d "restarting container of ${DARKYELLOW}$service_name${NORMAL} twice" <<EOF
docker restart "$container_id"
sleep 2
docker restart "$container_id"
EOF
        return 2
    fi
    warn "Unknown issue with ${DARKYELLOW}$service_name${NORMAL}'s container:"
    echo "  ${WHITE}cmd:${NORMAL} docker exec -ti $container_id echo" >&2
    echo "$out" | prefix "  ${DARKGRAY}|${NORMAL} " >&2
    echo "  ${DARKGRAY}..${NORMAL} leaving this as-is."
    return 1
}

docker:api() {
    local endpoint="$1"
    curl -sS --unix-socket /var/run/docker.sock "http://localhost$endpoint"
}

docker:containers:id() {
    docker:api /containers/json | jq -r ".[] | .Id"
}
docker:containers:names() {
    docker:api /containers/json | jq -r '.[] | .Names[0] | ltrimstr("/")'
}

docker:container:stats() {
    container="$1"
    docker:api "/containers/$container/stats?stream=false"
}

docker:containers:stats() {
    :cache: scope=session

    local jobs='' line container id_names sha names name data service project
    local DC="com.docker.compose"
    local PSF_values=(
        ".ID" ".Names" ".Label \"$DC.project\"" ".Label \"$DC.service\"" ".Image"
    )
    local PSF="$(printf "{{%s}} " "${PSF_values[@]}")"
    id_names=$(docker ps -a --format="$PSF") || return 1

    ## Create a docker container table from name/sha to service, project, image_name
    declare -A resolve
    while read-0a line; do
        sha=${line%% *}; line=${line#* }
        names=${line%% *}; line=${line#* }
        names=(${names//,/ })
        for name in "${names[@]}"; do
            resolve["$name"]="$line"
        done
        resolve["$sha"]="$line"
    done < <(printf "%s\n" "$id_names")

    declare -A data
    while read-0a line; do
        name=${line%% *}; line=${line#* }
        ts=${line%% *}; line=${line#* }

        resolved="${resolve["$name"]}"
        project=${resolved%% *}; resolved=${resolved#* }
        service=${resolved%% *}; resolved=${resolved#* }
        image_name="$resolved"
        if [ -z "$service" ]; then
            project="@"
            service=$(docker inspect "$image_name" | jq -r '.[0].RepoTags[0]')
            service=${service//\//_}
        fi
        if [ -n "${data["$project/$service"]}" ]; then
            previous=(${data["$project/$service"]})
            previous=(${previous[@]:1})
            current=($line)
            sum=()
            i=0; max=${#previous[@]}
            while (( i < max )); do
                sum+=($((${previous[$i]} + ${current[$i]})))
                ((i++))
            done
            data["$project/$service"]="$ts ${sum[*]}"
        else
            data["$project/$service"]="$ts $line"
        fi
    done < <(
    for container in "$@"; do
        (
            docker:container:stats "${container}" |
                jq -r '
                  (.name | ltrimstr("/"))
                     + " " + (.read | sub("\\.[0-9]+Z"; "Z") | fromdate | tostring)
                     + " " + (.memory_stats.usage | tostring)
                     + " " + (.memory_stats.stats.inactive_file | tostring)
                     + " " + ((.memory_stats.usage - .memory_stats.stats.inactive_file) | tostring)
                     + " " + (.memory_stats.limit | tostring)
                     + " " + (.networks.eth0.rx_bytes | tostring)
                     + " " + (.networks.eth0.rx_packets | tostring)
                     + " " + (.networks.eth0.rx_errors | tostring)
                     + " " + (.networks.eth0.rx_dropped | tostring)
                     + " " + (.networks.eth0.tx_bytes | tostring)
                     + " " + (.networks.eth0.tx_packets | tostring)
                     + " " + (.networks.eth0.tx_errors | tostring)
                     + " " + (.networks.eth0.tx_dropped | tostring)
                '
        ) &
        jobs=1
    done
    [ -n "$jobs" ] && wait
    )
    for label in "${!data[@]}"; do
        echo "$label ${data[$label]}"
    done
}
decorator._mangle_fn docker:containers:stats
export -f docker:containers:stats


col:normalize:size() {
  local alignment=$1

  awk -v alignment="$alignment" '{
    # Store the entire line in the lines array.
    lines[NR] = $0;

    # Split the line into fields.
    split($0, fields);

    # Update max for each field.
    for (i = 1; i <= length(fields); i++) {
      if (length(fields[i]) > max[i]) {
        max[i] = length(fields[i]);
      }
    }
  }
  END {
    # Print lines with fields padded to max.
    for (i = 1; i <= NR; i++) {
      split(lines[i], fields);

      line = "";
      for (j = 1; j <= length(fields); j++) {
        # Get alignment for the current field.
        align = substr(alignment, j, 1);
        if (align != "+") {
          align = "-";  # Default to left alignment if not "+".
        }

        line = line sprintf("%" align max[j] "s ", fields[j]);
      }
      print line;
    }
  }'
}


rrd:create() {
    local prefix="$1"
    shift
    local label="$1" step="300" src_def
    shift
    if [ -z "$VAR_DIR" ]; then
        err "Unset \$VAR_DIR, can't create rrd graph"
        return 1
    fi
    mkdir -p "$VAR_DIR"
    if ! [ -d "$VAR_DIR" ]; then
        err "Invalid \$VAR_DIR: '$VAR_DIR' is not a directory"
        return 1
    fi
    if ! type -p rrdtool >/dev/null 2>&1; then
        apt-get install rrdtool -y --force-yes </dev/null
        if ! type -p rrdtool 2>/dev/null 2>&1; then
            err "Couldn't find nor install 'rrdtool'."
            return 1
        fi
    fi

    local RRD_PATH="$VAR_DIR/rrd"

    local RRD_FILE="$RRD_PATH/$prefix/$label.rrd"
    mkdir -p "${RRD_FILE%/*}"
    if [ -f "$RRD_FILE" ]; then
        err "File '$RRD_FILE' already exists, use a different label."
        return 1
    fi

    local rrd_ds_opts=()
    for src_def in "$@"; do
        IFS=":" read -r name type min max rra_types <<<"$src_def"
        rra_types=${rra_types:-average,max,min}
        rrd_ds_opts+=("DS:$name:$type:900:$min:$max")
    done

    local step=120
    local times=(            ## with steps 120 is 2mn datapoint
        2m:1w
        6m:3w
        30m:12w
        3h:1y
        1d:10y
        1w:2080w
    )
    rrd_rra_opts=()
    for time in "${times[@]}"; do
        rrd_rra_opts+=("RRA:"{AVERAGE,MIN,MAX}":0.5:$time")
    done
    cmd=(
        rrdtool create "$RRD_FILE" \
         --step "$step" \
	     "${rrd_ds_opts[@]}" \
	     "${rrd_rra_opts[@]}"
    )

    "${cmd[@]}" || {
        err "Failed command: ${cmd[@]}"
        return 1
    }
}


rrd:update() {
    local prefix="$1"
    shift
    while read-0a data; do
        [ -z "$data" ] && continue
        IFS="~" read -ra data <<<"${data// /\~}"
        label="${data[0]}"
        ts="${data[1]}"
        for arg in "$@"; do
            IFS="|" read -r name arg <<<"$arg"
            rrd_label="${label}/${name}"
            rrd_create_opt=()
            rrd_update_opt="$ts"
            for col_def in ${arg//,/ }; do
                col=${col_def%%:*}; create_def=${col_def#*:}
                rrd_update_opt="${rrd_update_opt}:${data[$col]}"
                rrd_create_opt+=("$create_def")
            done
            local RRD_ROOT_PATH="$VAR_DIR/rrd"
            local RRD_PATH="$RRD_ROOT_PATH/${prefix%/}"
            local RRD_FILE="${RRD_PATH%/}/${rrd_label#/}.rrd"
            if ! [ -f "$RRD_FILE" ]; then
                info "Creating new RRD file '${RRD_FILE#$RRD_ROOT_PATH/}'"
                if ! rrd:create "$prefix" "${rrd_label}" "${rrd_create_opt[@]}" </dev/null ; then
                    err "Couldn't create new RRD file ${rrd_label} with options: '${rrd_create_opt[*]}'"
                    return 1
                fi
            fi
            rrdtool update "$RRD_FILE" "$rrd_update_opt" || {
                err "update failed with options: '$rrd_update_opt'"
                return 1
            }
        done
    done
}



[ "$SOURCED" ] && return 0

##
## Command line processing
##


cmdline.spec.gnu
cmdline.spec.reporting

cmdline.spec.gnu install


cmdline.spec::cmd:install:run() {
    :
}


cmdline.spec.gnu get-type
cmdline.spec::cmd:get-type:run() {
    vps:get-type
}


cmdline.spec:install:cmd:backup:run() {

    : :posarg: BACKUP_SERVER        'Target backup server'

    : :optfla: --ignore-domain-check \
                                   "Allow to bypass the domain check in
                                    compose file (only used in compose
                                    installation)."
    : :optfla: --ignore-ping-check "Allow to bypass the ping check of host."

    local vps_type

    vps_type=$(vps:get-type) || {
        err "Failed to get type of installation."
        return 1
    }
    if ! fn.exists "${vps_type}:install-backup"; then
        err "type '${vps_type}' has no backup installation implemented yet."
        return 1
    fi

    opts=()

    [ "$opt_ignore_ping_check" ] &&
        opts+=("--ignore-ping-check")

    if [ "$vps_type" == "compose" ]; then
        [ "$opt_ignore_domain_check" ] &&
            opts+=("--ignore-domain-check")
    fi

    "cmdline.spec:install:cmd:${vps_type}-backup:run" "${opts[@]}" "$BACKUP_SERVER"
}


DEFAULT_BACKUP_SERVICE_NAME=rsync-backup
cmdline.spec.gnu compose-backup
cmdline.spec:install:cmd:compose-backup:run() {

    : :posarg: BACKUP_SERVER        'Target backup server'

    : :optval: --service-name,-s   "YAML service name in compose
                                    file to check for existence of key.
                                    Defaults to '$DEFAULT_BACKUP_SERVICE_NAME'"
    : :optval: --compose-file,-f   "Compose file location. Defaults to
                                    the value of '\$DEFAULT_COMPOSE_FILE'"

    : :optfla: --ignore-domain-check \
                                   "Allow to bypass the domain check in
                                    compose file."
    : :optfla: --ignore-ping-check "Allow to bypass the ping check of host."


    local service_name compose_file


    [ -e "/etc/compose/local.conf" ] && source /etc/compose/local.conf

    compose_file=${opt_compose_file:-$DEFAULT_COMPOSE_FILE}
    service_name=${opt_service_name:-$DEFAULT_BACKUP_SERVICE_NAME}

    if ! [ -e "$compose_file" ]; then
        err "Compose file not found in '$compose_file'."
        return 1
    fi

    compose:install-backup "$BACKUP_SERVER" "$service_name" "$compose_file" \
	    "$opt_ignore_ping_check" "$opt_ignore_domain_check"

}


cmdline.spec:install:cmd:mailcow-backup:run() {

    : :posarg: BACKUP_SERVER        'Target backup server'

    : :optfla: --ignore-ping-check "Allow to bypass the ping check of host."

    "mailcow:install-backup" "$BACKUP_SERVER" "$opt_ignore_ping_check"
}



cmdline.spec.gnu backup
cmdline.spec::cmd:backup:run() {

    local vps_type
    vps_type=$(vps:get-type) || {
        err "Failed to get type of installation."
        return 1
    }
    if ! fn.exists "cmdline.spec:backup:cmd:${vps_type}:run"; then
        err "type '${vps_type}' has no backup process implemented yet."
        return 1
    fi

    "cmdline.spec:backup:cmd:${vps_type}:run"
}


cmdline.spec:backup:cmd:mailcow:run() {

    local cmd_line cron_line cmd

    for f in mysql-backup mirror-dir; do
        [ -e "/etc/cron.d/$f" ] || {
            err "Can't find '/etc/cron.d/$f'."
            echo "  Have you forgotten to run 'vps install backup BACKUP_HOST' ?" >&2
            return 1
        }

        if ! cron_line=$(cat "/etc/cron.d/$f" |
                         grep -v "^#" | grep "\* \* \*"); then
            err "Can't find cron_line in '/etc/cron.d/$f'." \
                "Have you modified it ?"
            return 1
        fi

        cron_line=${cron_line%|*}
        cmd_line=(${cron_line#*root})

        if [ "$f" == "mirror-dir" ]; then
            cmd=()
            for arg in "${cmd_line[@]}"; do
                [ "$arg" != "-q" ] && cmd+=("$arg")
            done
        else
            cmd=("${cmd_line[@]}")
        fi

        code="${cmd[*]}"
        echo "${WHITE}Launching:${NORMAL} ${code}"
        {
            {
                (
                    ## Some commands are using colors that are already
                    ## set by this current program and will trickle
                    ## down unwantedly
                    ansi_color no
                    eval "${code}"
                ) | sed -r "s/^/ ${GRAY}|${NORMAL} /g"
                set_errlvl "${PIPESTATUS[0]}"
            } 3>&1 1>&2 2>&3 | sed -r "s/^/ $DARKRED\!$NORMAL /g"
            set_errlvl "${PIPESTATUS[0]}"
        } 3>&1 1>&2 2>&3

        if [ "$?" != "0" ]; then
            err "Failed."
            return 1
        fi
    done
    info "Mysql backup and subsequent mirror-dir ${DARKGREEN}succeeded${NORMAL}."
}


set_errlvl() { return "${1:-1}"; }


cmdline.spec:backup:cmd:compose:run() {

    local cron_line args
    project_name=$(compose:project_name) || return 1
    docker_cmd=$(compose:get_cron_docker_cmd) || return 1

    echo "${WHITE}Launching:${NORMAL} docker exec -i "${project_name}_cron_1" $docker_cmd"

    {
        {
            eval "docker exec -i \"${project_name}_cron_1\" $docker_cmd" | sed -r "s/^/ ${GRAY}|${NORMAL} /g"
            set_errlvl "${PIPESTATUS[0]}"
        } 3>&1 1>&2 2>&3 | sed -r "s/^/ $DARKRED\!$NORMAL /g"
        set_errlvl "${PIPESTATUS[0]}"
    } 3>&1 1>&2 2>&3

    if [ "$?" != "0" ]; then
        err "Failed."
        return 1
    fi
    info "mirror-dir ${DARKGREEN}succeeded${NORMAL}."

}


cmdline.spec.gnu recover-target
cmdline.spec::cmd:recover-target:run() {

    : :posarg: BACKUP_DIR           'Source directory on backup side'
    : :posarg: HOST_DIR             'Target directory on host side'

    : :optval: --backup-host,-B     "The backup host"

    : :optfla: --dry-run,-n         "Don't do anything, instead tell what it
                                     would do."


    ## if no backup host take the one by default
    backup_host="$opt_backup_host"
    if [ -z "$backup_host" ]; then
        backup_host_ident=$(backup-action get_default_backup_host_ident) || return 1
        read -r backup_host ident <<<"$backup_host_ident"
    fi

    if [[ "$BACKUP_DIR" == /* ]]; then
        err "BACKUP_DIR must be a relative path from the root of your backup."
        return 1
    fi

    REAL_HOST_DIR=$(realpath "$HOST_DIR") || {
        err "Can't find HOST_DIR '$HOST_DIR'."
        return 1
    }
    export DRY_RUN="${opt_dry_run}"
    backup-action recover-target "$backup_host" "$ident" "$BACKUP_DIR" "$REAL_HOST_DIR"
}


cmdline.spec.gnu odoo

cmdline.spec::cmd:odoo:run() {
    :
}

cmdline.spec.gnu restart
cmdline.spec:odoo:cmd:restart:run() {

    : :optval: --service,-s       "The service (defaults to 'odoo')"

    local out odoo_service

    odoo_service="${opt_service:-odoo}"
    project_name=$(compose:project_name) || return 1

    if ! out=$(docker restart "${project_name}_${odoo_service}_1" 2>&1); then
        if [[ "$out" == *"no matching entries in passwd file" ]]; then
            warn "Catched docker bug. Restarting once more."
            if ! out=$(docker restart "${project_name}_${odoo_service}_1"); then
                err "Can't restart container ${project_name}_${odoo_service}_1 (restarted twice)."
                echo "  output:" >&2
                echo "$out" | prefix "  ${GRAY}|${NORMAL} " >&2
                exit 1
            fi
        else
            err "Couldn't restart container ${project_name}_${odoo_service}_1 (and no restart bug detected)."
            exit 1
        fi
    fi
    info "Container ${project_name}_${odoo_service}_1 was ${DARKGREEN}successfully${NORMAL} restarted."

}


cmdline.spec.gnu restore
cmdline.spec:odoo:cmd:restore:run() {

    : :posarg: ZIP_DUMP_LOCATION  'Source odoo dump file to restore
                                   (can be a local file or an url)'

    : :optval: --service,-s       "The service (defaults to 'odoo')"
    : :optval: --database,-D      'Target database (default if not specified)'
    : :optfla: --neutralize,-n    "Restore database in neutralized state."
    : :optfla: --debug,-d         "Display more information."

    local out

    odoo_service="${opt_service:-odoo}"

    if [[ "$ZIP_DUMP_LOCATION" == "http://"* ]] ||
       [[ "$ZIP_DUMP_LOCATION" == "https://"* ]]; then
        settmpdir ZIP_TMP_LOCATION
        tmp_location="$ZIP_TMP_LOCATION/dump.zip"
        curl -k -s -L "$ZIP_DUMP_LOCATION" > "$tmp_location" || {
            err "Couldn't get '$ZIP_DUMP_LOCATION'."
            exit 1
        }
        if [[ "$(dd if="$tmp_location" count=2 bs=1 2>/dev/null)" != "PK" ]]; then
            err "Download doesn't seem to be a zip file."
            dd if="$tmp_location" count=1 bs=256 | hd | prefix "  ${GRAY}|${NORMAL} " >&2
            exit 1
        fi
        info "Successfully downloaded '$ZIP_DUMP_LOCATION'"
        echo "    in '$tmp_location'." >&2
        ZIP_DUMP_LOCATION="$tmp_location"
    fi

    [ -e "$ZIP_DUMP_LOCATION" ] || {
        err "No file '$ZIP_DUMP_LOCATION' found." >&2
        exit 1
    }

    opts_compose=()
    [ -t 1 ] && opts_compose+=("--color")
    [ "$opt_debug" ] && {
        VERBOSE=1
        opts_compose+=("--debug")
    }
    opts_load=()
    [ "$opt_neutralize" ] && opts_load+=("--neutralize")

    project_name=$(compose:project_name) || exit 1
    container:health:check-fix:no-matching-entries "${project_name}_${odoo_service}_1"
    case "$?" in
        0)
            debug "Container ${project_name}_${odoo_service}_1 is healthy."
            ;;
        1) err "Container ${project_name}_${odoo_service}_1 is not healthy."
           exit 1
           ;;
        2) info "Container ${project_name}_${odoo_service}_1 was fixed."
           ;;
    esac

    msg_dbname=default
    [ -n "$opt_database" ] && msg_dbname="'$opt_database'"
    Wrap -vsd "drop $msg_dbname database of service ${DARKYELLOW}$odoo_service${NORMAL}" -- \
         compose --no-hooks "${opts_compose[@]}" drop "$odoo_service" $opt_database || {
        err "Error dropping $msg_dbname database of service ${DARKYELLOW}$odoo_service${NORMAL}:"
        [ -z "$opt_debug" ] && {
            echo "  Use \`\`--debug\`\` (or \`\`-d\`\`) to get more information." >&2
        }
        exit 1
    }
    Wrap -vsd "restore $msg_dbname database of service ${DARKYELLOW}$odoo_service${NORMAL}" -- \
         compose --no-hooks "${opts_compose[@]}" \
            load "$odoo_service" $opt_database "${opts_load[@]}" < "$ZIP_DUMP_LOCATION" || {
        err "Error restoring service ${DARKYELLOW}$odoo_service${NORMAL} to $msg_dbname database."
        [ -z "$opt_debug" ] && {
            echo "  Use \`\`--debug\`\` (or \`\`-d\`\`) to get more information." >&2
        }
        exit 1
    }

    ## Restart odoo, ensure there is no bugs lingering on it.
    cmdline.spec:odoo:cmd:restart:run --service "$odoo_service" || exit 1

}

cmdline.spec.gnu dump
cmdline.spec:odoo:cmd:dump:run() {

    : :posarg: DUMP_ZIPFILE       'Target path to store odoo dump zip file.'
    : :optval: --database,-d      'Target database (default if not specified)'
    : :optval: --service,-s       "The service (defaults to 'odoo')"

    odoo_service="${opt_service:-odoo}"


    msg_dbname=default
    [ -n "$opt_database" ] && msg_dbname="'$opt_database'"
    compose --no-hooks save "$odoo_service" $opt_database > "$DUMP_ZIPFILE" || {
        err "Error dumping ${DARKYELLOW}$odoo_service${NORMAL}'s $msg_dbname database to '$DUMP_ZIPFILE'."
        exit 1
    }

    info "Successfully dumped ${DARKYELLOW}$odoo_service${NORMAL}'s $msg_dbname database to '$DUMP_ZIPFILE'."

}


cmdline.spec.gnu drop
cmdline.spec:odoo:cmd:drop:run() {

    : :optval: --database,-d      'Target database (default if not specified)'
    : :optval: --service,-s       "The service (defaults to 'odoo')"

    odoo_service="${opt_service:-odoo}"

    msg_dbname=default
    [ -n "$opt_database" ] && msg_dbname="'$opt_database'"
    compose --no-hooks drop "$odoo_service" $opt_database || {
        err "Error dropping ${DARKYELLOW}$odoo_service${NORMAL}'s $msg_dbname database."
        exit 1
    }

    info "Successfully dropped ${DARKYELLOW}$odoo_service${NORMAL}'s $msg_dbname database."

}


cmdline.spec.gnu set-cyclos-url
cmdline.spec:odoo:cmd:set-cyclos-url:run() {

    : :optval: --database,-d      "Target database ('odoo' if not specified)"
    : :optval: --service,-s       "The cyclos service name (defaults to 'cyclos')"

    local URL

    dbname=${opt_database:-odoo}
    cyclos_service="${opt_service:-cyclos}"
    project_name=$(compose:project_name) || exit 1
    URL=$(compose:get_url "${project_name}" "${cyclos_service}") || exit 1

    Wrap -d "set cyclos url to '$URL'" <<EOF || exit 1
    echo "UPDATE res_company SET cyclos_server_url = '$URL/api' WHERE id=1;" |
        compose:psql "$project_name" "$dbname"  || {
        err "Failed to set cyclos url value in '$dbname' database."
        exit 1
    }
EOF

}


cmdline.spec.gnu fix-sso
cmdline.spec:odoo:cmd:fix-sso:run() {

    : :optval: --database,-d      "Target database ('odoo' if not specified)"

    local public_user_id project_name dbname

    dbname=${opt_database:-odoo}
    project_name=$(compose:project_name) || exit 1
    public_user_id=$(odoo:get_public_user_id "${project_name}" "${dbname}") || exit 1
    Wrap -d "fix website's object to 'public_user' (id=$public_user_id)" <<EOF || exit 1
    echo "UPDATE website SET user_id = $public_user_id;" |
        compose:psql "$project_name" "$dbname"  || {
        err "Failed to set website's object user_id to public user's id ($public_user_id) in '$dbname' database."
        exit 1
    }
EOF

}


cmdline.spec.gnu cyclos

cmdline.spec::cmd:cyclos:run() {
    :
}


cmdline.spec:cyclos:cmd:dump:run() {

    : :posarg: DUMP_GZFILE        'Target path to store odoo dump gz file.'

    : :optval: --database,-d      "Target database ('cyclos' if not specified)"
    : :optval: --service,-s       "The cyclos service name (defaults to 'cyclos')"

    cyclos_service="${opt_service:-cyclos}"
    cyclos_database="${opt_database:-cyclos}"
    project_name=$(compose:project_name) || exit 1
    container_id=$(compose:service:container_one "$project_name" "${cyclos_service}") || exit 1


    Wrap -d "stop ${DARKYELLOW}${cyclos_service}${NORMAL}'s container" -- \
         docker stop "$container_id" || exit 1

    Wrap -d "Dump postgres database '${cyclos_database}'." -- \
         postgres:dump "${project_name}" "$cyclos_database" "$DUMP_GZFILE" || exit 1

    Wrap -d "start ${DARKYELLOW}${cyclos_service}${NORMAL}'s container" -- \
         docker start "${container_id}" || exit 1
}


cmdline.spec.gnu restore
cmdline.spec:cyclos:cmd:restore:run() {

    : :posarg: GZ_DUMP_LOCATION  'Source cyclos dump file to restore
                                   (can be a local file or an url)'

    : :optval: --service,-s       "The service (defaults to 'cyclos')"
    : :optval: --database,-d      'Target database (default if not specified)'

    local out

    cyclos_service="${opt_service:-cyclos}"
    cyclos_database="${opt_database:-cyclos}"
    project_name=$(compose:project_name) || exit 1
    url=$(compose:get_url "${project_name}" "${cyclos_service}") || return 1
    container_id=$(compose:service:container_one "$project_name" "${cyclos_service}") || exit 1

    if [[ "$GZ_DUMP_LOCATION" == "http://"* ]] ||
       [[ "$GZ_DUMP_LOCATION" == "https://"* ]]; then
        settmpdir GZ_TMP_LOCATION
        tmp_location="$GZ_TMP_LOCATION/dump.gz"

        Wrap -d "get '$GZ_DUMP_LOCATION'" <<EOF || exit 1

        ## Note that curll version before 7.76.0 do not have
        curl -k -s -L "$GZ_DUMP_LOCATION" --fail \\
        > "$tmp_location" || {
            echo "Error fetching ressource. Is url correct ?" >&2
            exit 1
        }

        if [[ "\$(dd if="$tmp_location" count=2 bs=1 2>/dev/null |
                     hexdump -v -e "/1 \"%02x\"")" != "1f8b" ]]; then
            err "Download doesn't seem to be a gzip file."
            dd if="$tmp_location" count=1 bs=256 | hd | prefix "  ${GRAY}|${NORMAL} " >&2
            exit 1
        fi
EOF
        GZ_DUMP_LOCATION="$tmp_location"
    fi

    [ -e "$GZ_DUMP_LOCATION" ] || {
        err "No file '$GZ_DUMP_LOCATION' found." >&2
        exit 1
    }

    Wrap -d "stop ${DARKYELLOW}${cyclos_service}${NORMAL}'s container" -- \
         docker stop "$container_id" || exit 1

    ## XXXvlab: making the assumption that the postgres username should
    ## be the same as the cyclos service selected (which is the default,
    ## but not always the case).
    Wrap -d "restore postgres database '${cyclos_database}'." -- \
        postgres:restore "$project_name" "$GZ_DUMP_LOCATION" "${cyclos_service}@${cyclos_database}" || exit 1
    ## ensure that the database is not locked

    Wrap -d "check and remove database lock if any" -- \
         cyclos:unlock "${project_name}" "${cyclos_database}" || exit 1

    Wrap -d "set root url to '$url'" -- \
         cyclos:set_root_url "${project_name}" "${cyclos_database}" "${url}" || exit 1

    Wrap -d "start ${DARKYELLOW}${cyclos_service}${NORMAL}'s container" -- \
         docker start "${container_id}" || exit 1

}


cmdline.spec.gnu set-root-url
cmdline.spec:cyclos:cmd:set-root-url:run() {

    : :optval: --database,-d      "Target database ('cyclos' if not specified)"
    : :optval: --service,-s       "The cyclos service name (defaults to 'cyclos')"

    local URL

    cyclos_database=${opt_database:-cyclos}
    cyclos_service="${opt_service:-cyclos}"
    project_name=$(compose:project_name) || exit 1
    url=$(compose:get_url "${project_name}" "${cyclos_service}") || exit 1
    container_id=$(compose:service:container_one "${project_name}" "${cyclos_service}") || exit 1

    Wrap -d "stop ${DARKYELLOW}${cyclos_service}${NORMAL}'s container" -- \
         docker stop "$container_id" || exit 1

    Wrap -d "set root url to '$url'" -- \
         cyclos:set_root_url "${project_name}" "${cyclos_database}" "${url}" || exit 1

    Wrap -d "start ${DARKYELLOW}${cyclos_service}${NORMAL}'s container" -- \
         docker start "${container_id}" || exit 1

}


cmdline.spec.gnu unlock
cmdline.spec:cyclos:cmd:unlock:run() {

    : :optval: --database,-d      "Target database ('cyclos' if not specified)"
    : :optval: --service,-s       "The cyclos service name (defaults to 'cyclos')"

    local URL

    cyclos_database=${opt_database:-cyclos}
    cyclos_service="${opt_service:-cyclos}"
    project_name=$(compose:project_name) || exit 1
    container_id=$(compose:service:container_one "${project_name}" "${cyclos_service}") || exit 1

    Wrap -d "stop ${DARKYELLOW}${cyclos_service}${NORMAL}'s container" -- \
         docker stop "$container_id" || exit 1

    Wrap -d "check and remove database lock if any" -- \
         cyclos:unlock "${project_name}" "${cyclos_database}" || exit 1

    Wrap -d "start ${DARKYELLOW}${cyclos_service}${NORMAL}'s container" -- \
         docker start "${container_id}" || exit 1

}



cmdline.spec.gnu rocketchat

cmdline.spec::cmd:rocketchat:run() {
    :
}

cmdline.spec.gnu drop-indexes
cmdline.spec:rocketchat:cmd:drop-indexes:run() {

    : :optval: --database,-d      "Target database ('rocketchat' if not specified)"
    : :optval: --service,-s       "The rocketchat service name (defaults to 'rocketchat')"

    local URL

    rocketchat_database=${opt_database:-rocketchat}
    rocketchat_service="${opt_service:-rocketchat}"
    project_name=$(compose:project_name) || exit 1
    container_id=$(compose:service:container_one "${project_name}" "${rocketchat_service}") || exit 1

    Wrap -d "stop ${DARKYELLOW}${rocketchat_service}${NORMAL}'s container" -- \
         docker stop "$container_id" || exit 1

    errlvl=0
    Wrap -d "drop indexes" -- \
         rocketchat:drop-indexes "${project_name}" "${rocketchat_database}" || {
        errlvl=1
        errmsg="Failed to drop indexes"
    }
    Wrap -d "start ${DARKYELLOW}${rocketchat_service}${NORMAL}'s container" -- \
         docker start "${container_id}" || exit 1

    if [ "$errlvl" != 0 ]; then
        err "$errmsg"
    fi
    exit "$errlvl"
}


cmdline.spec.gnu nextcloud

cmdline.spec::cmd:nextcloud:run() {
    :
}

cmdline.spec.gnu upgrade
cmdline.spec:nextcloud:cmd:upgrade:run() {

    : :posarg: [TARGET_VERSION]  "Target version to migrate to"
    : :optval: --service,-s      "The nexcloud service name (defaults to 'nextcloud')"

    local URL

    nextcloud_service="${opt_service:-nextcloud}"
    project_name=$(compose:project_name) || exit 1
    containers=$(compose:service:containers "${project_name}" "${nextcloud_service}") || exit 1

    container_stopped=()
    if [ -n "$containers" ]; then
        for container in $containers; do
            Wrap -d "stop ${DARKYELLOW}${nextcloud_service}${NORMAL}'s container" -- \
                 docker stop "$container" || {
                err "Failed to stop container '$container'."
                exit 1
            }
            container_stopped+=("$container")
        done
    fi
    before_version=$(nextcloud:src:version) || exit 1

    ## -q to remove the display of ``compose`` related information
    ##    like relation resolution.
    ## --no-hint to remove the final hint about modifying your
    ##    ``compose.yml``.
    compose -q upgrade "$nextcloud_service" --no-hint "$TARGET_VERSION"
    errlvl="$?"

    after_version=$(nextcloud:src:version)
    if [ "$after_version" != "$before_version" ]; then
        desc="update \`compose.yml\` to set ${DARKYELLOW}$nextcloud_service${NORMAL}'s "
        desc+="docker image to actual code version ${WHITE}${after_version}${NORMAL}"
        Wrap -d "$desc" -- \
             compose:file:value-change \
             "${nextcloud_service}.docker-compose.image" \
             "docker.0k.io/nextcloud:${after_version}-myc" || exit 1
    fi

    if [ "$errlvl" == 0 ]; then
        echo "${WHITE}Launching final compose${NORMAL}"
        compose up || exit 1
    fi

    exit "$errlvl"
}




cmdline.spec.gnu check-fix
cmdline.spec::cmd:check-fix:run() {

    : :posarg: [SERVICES...]  "Optional service to check"
    : :optval: --check,-c     "Specify a check or a list of checks separated by commas"
    : :optfla: --silent,-s    "Don't ouput anything if everything goes well"

    local project_name service_name containers container check

    all_checks=$(declare -F |
                     egrep '^declare -fx? container:health:check-fix:[^ ]+$' |
                     cut -f 4 -d ":")
    checks=(${opt_check//,/ })
    for check in "${checks[@]}"; do
        fn.exists container:health:check-fix:$check || {
            err "check '$check' not found."
            return 1
        }
    done
    if [ "${#checks[*]}" == 0 ]; then
        checks=($all_checks)
    fi
    ## XXXvlab: could make it parallel
    project_name=$(compose:project_name) || exit 1
    containers=($(compose:project:containers "${project_name}")) || exit 1

    found=
    for container in "${containers[@]}"; do
        service_name=$(docker ps --filter id="$container" --format '{{.Label "com.docker.compose.service"}}')
        if [ "${#SERVICES[@]}" -gt 0 ]; then
            [[ " ${SERVICES[*]} " == *" $service_name "* ]] || continue
        fi
        found=1
        one_bad=
        for check in "${checks[@]}"; do
            if ! container:health:check-fix:"$check" "$container"; then
                one_bad=1
            fi
        done
        if [ -z "$opt_silent" ] && [ -z "$one_bad" ]; then
            Elt "containers have been checked for ${DARKYELLOW}$service_name${NORMAL}"
            Feedback
        fi
    done
    if [ -z "$found" ]; then
        if [ -z "$opt_silent" ]; then
            if [ "${#SERVICES[@]}" -gt 0 ]; then
                warn "No container for given services found in current project '$project_name'."
            else
                warn "No container found for current project '$project_name'."
            fi
        fi
        return 1
    fi
}


awk:require() {
    local require_at_least="$1" version already_installed
    while true; do
        if ! version=$(awk --version 2>/dev/null); then
            version=""
        else
            version=${version%%,*}
            version=${version##* }
        fi
        if [ -z "$version" ] || version_gt "$require_at_least" "$version"; then
            if [ -z "$already_installed" ]; then
                if [ -z "$version" ]; then
                    info "No 'gawk' available, probably using a clone. Installing 'gawk'..."
                else
                    info "Found gawk version '$version'. Updating 'gawk'..."
                fi
                apt-get install gawk -y </dev/null || {
                    err "Failed to install 'gawk'."
                    return 1
                }
                already_installed=true
            else
                if [ -z "$version" ]; then
                    err "No 'gawk' available even after having installed one"
                else
                    err "'gawk' version '$version' is lower than required" \
                        "'$require_at_least' even after updating 'gawk'."
                fi
                return 1
            fi
            continue
        fi
        return 0
    done
}


cmdline.spec.gnu stats
cmdline.spec::cmd:stats:run() {

    : :optval: --format,-f    "Either 'silent', 'raw', or 'pretty', default is pretty."
    : :optfla: --silent,-s    "Shorthand for '--format silent'"
    : :optval: --resource,-r   'resource(s) separated with a comma'


    local project_name service_name containers container check

    if [[ -n "${opt_silent}" ]]; then
        if [[ -n "${opt_format}" ]]; then
            err "'--silent' conflict with option '--format'."
            return 1
        fi
        opt_format=s
    fi
    opt_format="${opt_format:-pretty}"
    case "${opt_format}" in
        raw|r)
            opt_format="raw"
            :
            ;;
        silent|s)
            opt_format="silent"
            ;;
        pretty|p)
            opt_format="pretty"
            awk:require 4.1.4 || return 1
            ;;
        *)
            err "Invalid value '$opt_format' for option --format"
            echo "  use either 'raw' (shorthand 'r'), 'silent' (shorthand 's') or pretty (shorthand 'p')." >&2
            return 1
    esac

    local resources=(c.{memory,network} load_avg)
    if [ -n "${opt_resource}" ]; then
        resources=(${opt_resource//,/ })
    fi

    local not_found=()
    for resource in "${resources[@]}"; do
        if ! fn.exists "stats:$resource"; then
            not_found+=("$resource")
        fi
    done

    if [[ "${#not_found[@]}" -gt 0 ]]; then
        not_found_msg=$(printf "%s, " "${not_found[@]}")
        not_found_msg=${not_found_msg%, }
        err "Unsupported resource(s) provided: ${not_found_msg}"
        echo "  resource must be one-of:" >&2
        declare -F | egrep -- '-fx? stats:[a-zA-Z0-9_.]+$' | cut -f 3- -d " " | cut -f 2- -d ":" | prefix "  - " >&2
        return 1
    fi

    :state-dir:

    for resource in "${resources[@]}"; do
        if [ "$opt_format" == "pretty" ]; then
            echo "${WHITE}$resource${NORMAL}:"
            stats:"$resource" "$opt_format" 2>&1 | prefix "  "
        else
            stats:"$resource" "$opt_format" 2>&1 | prefix "$resource "
        fi
        set_errlvl "${PIPESTATUS[0]}" || return 1
    done
}

stats:c.memory() {
    local format="$1"
    local out
    container_to_check=($(docker:running_containers)) || exit 1
    out=$(docker:containers:stats "${container_to_check[@]}")
    printf "%s\n" "$out" | rrd:update "containers" "memory|3:usage:GAUGE:U:U,4:inactive:GAUGE:U:U" || {
        return 1
    }
    case "${format:-p}" in
        raw|r)
            printf "%s\n" "$out" | cut -f 1-5 -d " "
            ;;
        pretty|p)
            awk:require 4.1.4 || return 1
            {
                echo "container" "__total____" "buffered____" "resident____"
                printf "%s\n" "$out" |
                    awk '
                        {
                            offset = strftime("%z", $2);
                            print $1, substr($0, index($0,$3));
                        }' | cut -f 1-4 -d " " |
                    numfmt --field 2-4 --to=iec-i --format=%8.1fB |
                    sed -r 's/(\.[0-9])([A-Z]?iB)/\1:\2/g' |
                    sort
            } | col:normalize:size -+++ |
                sed -r 's/(\.[0-9]):([A-Z]?iB)/\1 \2/g' |
                header:make
            ;;
    esac
}

stats:c.network() {
    local format="$1"
    local out
    container_to_check=($(docker:running_containers)) || exit 1
    out=$(docker:containers:stats "${container_to_check[@]}")
    cols=(
        {rx,tx}_{bytes,packets,errors,dropped}
    )
    idx=5  ## starting column idx for next fields
    defs=()
    for col in "${cols[@]}"; do
        defs+=("$((idx++)):${col}:COUNTER:U:U")
    done
    OLDIFS="$IFS"
    IFS="," defs="${defs[*]}"
    IFS="$OLDIFS"
    printf "%s\n" "$out" |
        rrd:update "containers" \
                   "network|${defs}" || {
        return 1
    }
    case "${format:-p}" in
        raw|r)
            printf "%s\n" "$out" | cut -f 1,2,7- -d " "
            ;;
        pretty|p)
            awk:require 4.1.4 || return 1
            {
                echo "container" "_" "_" "_" "RX" "_" "_" "_" "TX"
                echo "_" "__bytes____" "__packets" "__errors" "__dropped" "__bytes____" "__packets" "__errors" "__dropped"
                printf "%s\n" "$out" |
                    awk '
                        {
                            offset = strftime("%z", $2);
                            print $1, substr($0, index($0,$7));
                        }' |
                    numfmt --field 2,6 --to=iec-i --format=%8.1fB |
                    numfmt --field 3,4,5,7,8,9 --to=si --format=%8.1f |
                    sed -r 's/(\.[0-9])([A-Z]?(iB|B)?)/\1:\2/g' |
                    sort
            } | col:normalize:size -++++++++ |
                sed -r '
                s/(\.[0-9]):([A-Z]?iB)/\1 \2/g;
                s/(\.[0-9]):([KMGTPE])/\1 \2/g;
                s/  ([0-9]+)\.0:B/\1      /g;
                s/ ([0-9]+)\.0:/\1    /g;
' |
                header:make 2
            ;;
    esac
}


header:make() {
    local nb_line="${1:-1}"
    local line
    while ((nb_line-- > 0)); do 
        read-0a line
        echo "${GRAY}$(printf "%s" "$line" | sed -r 's/_/ /g')${NORMAL}"
    done
    cat
}


stats:load_avg() {
    local format="$1"
    local out
    out=$(host:sys:load_avg)
    printf "%s\n" "$out" | rrd:update "" "load_avg|2:load_avg_1:GAUGE:U:U,3:load_avg_5:GAUGE:U:U,4:load_avg_15:GAUGE:U:U" || {
        return 1
    }
    case "${format:-p}" in
        raw|r)
            printf "%s\n" "$out" | cut -f 2-5 -d " "
            ;;
        pretty|p)
            {
                echo "___1m" "___5m" "__15m"
                printf "%s\n" "$out" | cut -f 3-5 -d " "
            }  | col:normalize:size +++ | header:make
            ;;
    esac
}


host:sys:load_avg() {
    local uptime
    uptime="$(uptime)"
    uptime=${uptime##*: }
    uptime=${uptime//,/}
    printf "%s " "" "$(date +%s)" "$uptime"
}


cmdline.spec.gnu mongo

cmdline.spec::cmd:mongo:run() {
    :
}

cmdline.spec.gnu upgrade
cmdline.spec:mongo:cmd:upgrade:run() {

    : :posarg: [TARGET_VERSION]  "Target version to migrate to"
    : :optval: --service,-s      "The mongo service name (defaults to 'mongo')"
    : :optfla: --debug,-d        "Display debugging information"

    local URL

    mongo_service="${opt_service:-mongo}"
    available_actions=$(compose --get-available-actions) || exit 1
    available_actionable_services=($(e "$available_actions" | yq 'keys().[]'))
    if [[ " ${available_actionable_services[*]} " != *" $mongo_service "* ]]; then
        err "Service '$mongo_service' was not found in current 'compose.yml'."
        exit 1
    fi
    opts_compose=()
    if [ -n "$opt_debug" ]; then
        opts_compose+=("--debug")
    else
        opts_compose+=("-q")
    fi

    project_name=$(compose:project_name) || exit 1
    containers="$(compose:service:containers "${project_name}" "${mongo_service}")" || exit 1

    ## XXXvlab: quick hack, to make more beautiful later
    cron_container=$(compose:service:containers "${project_name}" "cron")
    containers="$containers $cron_container"
    docker stop "$cron_container" >/dev/null 2>&1 || true

    before_version=
    uptodate=
    upgraded=
    msgerr=()
    while read-0a-err errlvl line; do
        echo "$line"
        rline=$(printf "%s" "$line" | sed_compat "s/$__color_sequence_regex//g")
        case "$rline" in
            "II Current mongo version: "*)
                before_version="${rline#II Current mongo version: }"
                ;;
            "II ${mongo_service} is already up-to-date.")
                if [ -z "$before_version" ]; then
                    msgerr+=("expected a 'current version' line before the 'up-to-date' one.")
                    continue
                fi
                after_version="$before_version"
                uptodate=1
                ;;
            "II Successfully upgraded from ${before_version} to "*)
                after_version="${rline#II Successfully upgraded from ${before_version} to }"
                upgraded=1
                ;;
            *)
                :
                ;;
        esac
    done < <(
        ## -q to remove the display of ``compose`` related information
        ##    like relation resolution.
        ## -c on the upgrade action to force color
        ansi_color=yes p-0a-err compose -c "${opts_compose[@]}" upgrade "$mongo_service" --no-hint -c "$TARGET_VERSION"
    )

    if [ "$errlvl" != 0 ]; then
        exit "$errlvl"
    fi
    if [ -n "$uptodate" ]; then
        for container in "${containers[@]}"; do
            [ -n "$container" ] || continue
            Wrap -d "start ${DARKYELLOW}${mongo_service}${NORMAL}'s container" -- \
                 docker start "$container" || {
                err "Failed to start container '$container'."
                exit 1
            }
        done
        exit 0
    fi
    if [ -z "$upgraded" ]; then
        err "Unexpected output of 'upgrade' action with errorlevel 0 and without success"
        exit 1
    fi

    desc="update \`compose.yml\` to set ${DARKYELLOW}$mongo_service${NORMAL}'s "
    desc+="docker image to actual code version ${WHITE}${after_version}${NORMAL}"
    Wrap -d "$desc" -- \
         compose:file:value-change \
         "${mongo_service}.docker-compose.image" \
         "docker.0k.io/mongo:${after_version}-myc" || exit 1

    echo "${WHITE}Launching final compose${NORMAL}"
    compose up || exit 1
}


cmdline.spec.gnu postgres

cmdline.spec::cmd:postgres:run() {
    :
}

cmdline.spec.gnu upgrade
cmdline.spec:postgres:cmd:upgrade:run() {

    : :posarg: [TARGET_VERSION]  "Target version to migrate to"
    : :optval: --service,-s      "The postgre service name (defaults to 'postgres')"
    : :optfla: --debug,-d        "Display debugging information"

    local URL

    depends yq

    postgres_service="${opt_service:-postgres}"
    available_actions=$(compose --get-available-actions) || exit 1
    available_actionable_services=($(e "$available_actions" | yq 'keys().[]'))
    if [[ " ${available_actionable_services[*]} " != *" $postgres_service "* ]]; then
        err "Service '$postgres_service' was not found in current 'compose.yml'."
        exit 1
    fi
    opts_compose=()
    if [ -n "$opt_debug" ]; then
        opts_compose+=("--debug")
    else
        opts_compose+=("-q")
    fi

    project_name=$(compose:project_name) || exit 1
    containers=($(compose:service:containers "${project_name}" "${postgres_service}")) || exit 1

    ## XXXvlab: quick hack, to make more beautiful later
    cron_container=$(compose:service:containers "${project_name}" "cron")
    containers+=("$cron_container")
    docker stop "$cron_container" >/dev/null 2>&1 || true

    before_version=
    uptodate=
    upgraded=
    msgerr=()
    while read-0a-err errlvl line; do
        echo "$line"
        rline=$(printf "%s" "$line" | sed_compat "s/$__color_sequence_regex//g")
        case "$rline" in
            "II Current postgres version: "*)
                before_version="${rline#II Current postgres version: }"
                ;;
            "II ${postgres_service} is already up-to-date.")
                if [ -z "$before_version" ]; then
                    msgerr+=("expected a 'current version' line before the 'up-to-date' one.")
                    continue
                fi
                after_version="$before_version"
                uptodate=1
                ;;
            "II Successfully upgraded from ${before_version} to "*)
                after_version="${rline#II Successfully upgraded from ${before_version} to }"
                upgraded=1
                ;;
            *)
                :
                ;;
        esac
    done < <(
        ## -q to remove the display of ``compose`` related information
        ##    like relation resolution.
        ## -c on the upgrade action to force color
        ansi_color=yes p-0a-err compose -q -c "${opts_compose[@]}" upgrade "$postgres_service" --no-hint -c "$TARGET_VERSION" 2>&1
    )

    if [ "$errlvl" != 0 ]; then
        exit "$errlvl"
    fi
    if [ -n "$uptodate" ]; then
        for container in "${containers[@]}"; do
            [ -n "$container" ] || continue
            Wrap -d "start ${DARKYELLOW}${postgres_service}${NORMAL}'s container" -- \
                 docker start "$container" || {
                err "Failed to start container '$container'."
                exit 1
            }
        done
        exit 0
    fi
    if [ -z "$upgraded" ]; then
        err "Unexpected output of 'upgrade' action with errorlevel 0 and without success"
        exit 1
    fi

    desc="update \`compose.yml\` to set ${DARKYELLOW}$postgres_service${NORMAL}'s "
    desc+="docker image to actual code version ${WHITE}${after_version}${NORMAL}"
    Wrap -d "$desc" -- \
         compose:file:value-change \
         "${postgres_service}.docker-compose.image" \
         "docker.0k.io/postgres:${after_version}-myc" || exit 1

    echo "${WHITE}Launching final compose${NORMAL}"
    compose up || exit 1
}



cmdline.spec.gnu bench

cmdline.spec::cmd:bench:run() {

    depends sysbench

    nbthread=$(lscpu | egrep "^CPU\(s\):" | cut -f 2 -d : | xargs echo)
    single=$(sysbench cpu --cpu-max-prime=20000 run --threads=1 | grep "events per" | cut -f 2 -d : | xargs echo)
    threaded=$(sysbench cpu --cpu-max-prime=20000 run --threads="$nbthread" | grep "events per" | cut -f 2 -d : | xargs echo)
    echo "$threaded / $single / $nbthread"

}


cmdline.spec::cmd:monujo:run() {
    :
}

cmdline.spec.gnu monujo
cmdline.spec:monujo:cmd:set-version:run() {

    : :posarg: TARGET_VERSION  "Target version to put in options"
    : :optval: --service,-s      "The monujo service name (defaults to 'monujo')"

    local URL

    monujo_service="${opt_service:-monujo}"
    project_name=$(compose:project_name) || exit 1

    ## check if service exists in compose.yml
    compose:service:exists "$project_name" "$monujo_service" || {
        err "Service '$monujo_service' was not found in current 'compose.yml'."
        exit 1
    }

    Wrap -d "Changing ${DARKYELLOW}$monujo_service${NORMAL} version" -- \
         compose:file:value-change \
         "${monujo_service}.options.version" \
         "${TARGET_VERSION}" || exit 1

}


cmdline::parse "$@"