entrypoint.sh

#!/bin/sh
# vim:sw=4:ts=4:et

set -e

if [ "$1" = "google-drive-ocamlfuse" ]; then
    if [ -f "$HOME/.gdfuse/default/state" ]; then
        printf "State file found. Checking access token validity...\n"
        ACCESS_TOKEN=$(grep last_access_token "$HOME/.gdfuse/default/state" | sed -r "s/^last_access_token=//")
        if [ -n "$ACCESS_TOKEN" ]; then
            if wget "https://oauth2.googleapis.com/tokeninfo?access_token=${ACCESS_TOKEN}" -O /dev/null --quiet; then
                printf "Access token still valid. Mounting filesystem on %s.\n" "$HOME/gdrive"
                exec "$@"
            else
                printf "Access token no longer valid. Revalidating...\n"
                rm -f "$HOME/.gdfuse/default/state"
                REQUEST_TOKEN="true"
            fi
        else
            printf "No access token found. Requesting new one...\n"
            REQUEST_TOKEN="true"
        fi
    else
        printf "No state file found. Requesting authentication token...\n"
        REQUEST_TOKEN="true"
    fi

    if [ "$REQUEST_TOKEN" = "true" ]; then
        if google-drive-ocamlfuse -verbose -headless -log_to - -id "$CLIENT_ID" -secret "$SECRET"; then
            exec "$@"
        fi
    fi
else
    exec "$@"
fi