#!/bin/bash

## Init is run on host
## For now it is run every time the script is launched, but
## it should be launched only once after build.

## Accessible variables are:
## - SERVICE_NAME        Name of current service
## - DOCKER_BASE_IMAGE   Base image from which this service might be built if any
## - SERVICE_DATASTORE           Location on host of the DATASTORE of this service
## - SERVICE_CONFIGSTORE         Location on host of the CONFIGSTORE of this service


. lib/common

set -e

if [ "${HOST_DATASTORE+x}" ]; then
    export HOST_DB_PASSFILE="$HOST_DATASTORE/${SERVICE_NAME}$DB_DATADIR/my.cnf"
else
    export HOST_DB_PASSFILE="$CLIENT_DB_PASSFILE"
fi


if ! [ -d "$HOST_DATASTORE/${SERVICE_NAME}$DB_DATADIR" ]; then

    MYSQL_ROOT_PASSWORD="$(gen_password)"

    debug docker run -e "MYSQL_ROOT_PASSWORD=$MYSQL_ROOT_PASSWORD" \
        --rm \
        -v "$DATA_DIR:$DB_DATADIR" \
        --entrypoint /bin/bash "$DOCKER_BASE_IMAGE"
    docker run -e "MYSQL_ROOT_PASSWORD=$MYSQL_ROOT_PASSWORD" \
        --rm \
        -v "$DATA_DIR:$DB_DATADIR" \
        --entrypoint /bin/bash "$DOCKER_BASE_IMAGE" -c '
    mysqld() {
        echo "diverted mysqld call..." >&2;
        echo "$*" | grep -E "(--help|--skip-networking)" >/dev/null 2>&1 || return;
        echo "  .. Allowing call." >&2;
        /usr/sbin/mysqld "$@";
    }
    export -f mysqld;
    /docker-entrypoint.sh mysqld' || true
    ## docker errorlevel is still 0 even if it failed.
    ## AND we must ignore mysqld error !
    [ "$(find "$DATA_DIR" \
          -maxdepth 0 -type d -empty 2>/dev/null)" ] && {
        err "Docker run probably failed to do it's job."
        exit 1
    }

    ## XXXvlab: this won't help support multiple project running on the
    ## same host
    cat <<EOF > "$HOST_DB_PASSFILE"
[client]
password=$MYSQL_ROOT_PASSWORD
EOF
    chmod 600 "$HOST_DB_PASSFILE"
    info "New root password for mysql. "
fi