dropbear_init

#!/usr/bin/env bash

# ┌┌────────────────────────────────────────────────────────────────────────┐┐ #
# ││ Dependencies:                                                          ││ #
# ││ ./scripts/run/dropbear_init                                            ││ #
# ││ └─ dropbear                                                            ││ #
# ││ └─ ./scripts/run/dropbear_settings                                     ││ #
# ││ └─ ./scripts/run/print_functions                                       ││ #
# ││ └─ ./scripts/run/ssh_entrypoint                                        ││ #
# ││ └─ ./scripts/run/ssh_key_check                                         ││ #
# ││ └─ ./scripts/run/ssh_key_setup                                         ││ #
# └└────────────────────────────────────────────────────────────────────────┘┘ #

# =========================== > Environment File < =========================== #
# ┌┌────────────────────────────────────────────────────────────────────────┐┐ #
# ││ This will check for an environment file and source it if it is there   ││ #
# └└────────────────────────────────────────────────────────────────────────┘┘ #
ENV_FILE=""
if [ -f "${HOME}/.env" ]; then
    ENV_FILE="${HOME}/.env"
elif [ -f "/.env" ]; then
    ENV_FILE="/.env"
fi

if [ ! -z "${ENV_FILE}" ]; then
    source "${ENV_FILE}" &&
        {
            echo "source'd ${ENV_FILE}"
        } ||
        printf "%s\n" "sourcing ${ENV_FILE} failed"

    if [ -f "${HOME}/.Rprofile" ]; then
        RPROFILE_FILE="${HOME}/.Rprofile"
    elif [ -f "/.Rprofile" ]; then
        RPROFILE_FILE="/.Rprofile"
    fi
    if [ ! -z "${RPROFILE_FILE}" ]; then
        cat <<EOF >>"${RPROFILE_FILE}"
readRenviron("/.env")
EOF
    fi
fi

# ────────────────────────────────── <end> ─────────────────────────────────── #

source "${DEV_CONTAINER_DIR}/run/dropbear_settings"
source "${DEV_CONTAINER_DIR}/run/print_functions"

# Enter folder
mkdir -p "${DROPBEAR_FOLDER}"
cd ${DROPBEAR_FOLDER}

# Delete existing host keys
rm -rf ./host_key_*

# Read host keys from files in ${SSH_KEY_FOLDER}
source "${DEV_CONTAINER_DIR}/run/ssh_key_setup" "insert"

# Add section to .bashrc that automatically execudes code
bashrc_path="$HOME/.bashrc"

begin_delim="# >>>>>>>>>>>>>>>>>>>> dev-container shell setup >>>>>>>>>>>>>>>>>>>> "
end_delim="# <<<<<<<<<<<<<<<<<<<< dev-container shell setup <<<<<<<<<<<<<<<<<<<< "

# Remove the `dev-container shell setup` section from .bashrc if it is already there
if grep -iq "${begin_delim}" "${bashrc_path}"; then
    perl -p0i -e "s/${begin_delim}.*${end_delim}//gms" "${bashrc_path}"
fi

# Add `dev-container shell setup` section to .bashrc
cat \
    >>${bashrc_path} <<EOF
${begin_delim}

export DEV_CONTAINER_DIR="${DEV_CONTAINER_DIR}"
export PATH="${PATH}:\${PATH}"
export PATH="\$("${DEV_CONTAINER_DIR}/run/make_unique" "\${PATH}" ":")";

if [[ "\${TERM_PROGRAM}" == "vscode" ]]; then
    export __ssh_entrypoint_run__=
fi
source /.ssh_entrypoint
${end_delim}
EOF

# Initialize VScode server folders
source "${DEV_CONTAINER_DIR}/run/vscode-server_init"

# Check if keys have been changed in comparison to those
# publicly available on git
${DEV_CONTAINER_DIR}/run/ssh_key_check || {
    # Store cursor position
    tput_store_cursor
    printf "%s\n" "Do you wish to proceed $(tput_red "with unsafe keys")? (yes / no)"
    read -n 255 -t 30 answer
    if (echo "${answer}" | grep "^\s*[Yy]\([Ee][Ss]\)\{1,1\}\s*$"); then
        # Restore cursor position and clear everything afterwards
        tput_restore_and_clear
        echo "OK, $(tput_red "proceeding with unsafe keys")"
    else
        exit 1
    fi
}

if [ -n "${HOST}" ]; then
    SSH_HOSTNAME="$HOST"
elif [ -n "${HOSTNAME}" ]; then
    SSH_HOSTNAME="$HOSTNAME"
else
    err "\$HOST and \$HOSTNAME are both empty!"
    exit 1
fi

echo "$SSH_HOSTNAME" >"${DEV_CONTAINER_DIR}/ssh_hostname.txt"

echo "----------------------------------------------------"
printf "Running on %s, port %s\n" \
    "$SSH_HOSTNAME" \
    "${dropbear_port}"
echo "----------------------------------------------------"

/usr/local/sbin/dropbear -F -E -s -p ${dropbear_port}