Example Dockerfile showcasing S4 method caching at build-time

matrix_method_caching.Dockerfile

FROM rocker/r-ver:4.2.2

RUN apt-get update && apt-get upgrade -y

RUN Rscript -e "\
    install.packages('remotes'); \
    remotes::install_version('Matrix', '1.5.1'); \
    install.packages('SeuratObject', repos = 'https://cloud.r-project.org')"

RUN Rscript -e "print(packageVersion('Matrix'))"

RUN Rscript -e "install.packages('Matrix')"

RUN Rscript -e "\
    suppressPackageStartupMessages(library(SeuratObject)); \
    data('pbmc_small'); \
    graph <- pbmc_small[['RNA_snn']]; \
    print(class(graph)); \
    print(getClass('Graph')); \
    cat('\n'); \
    print('Attempting to show a Graph'); \
    tryCatch(show(graph), error = function(e) {print(e$message); NULL}); \
"