build: remove R dependencies from stats image - #56
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The plots have been generated with matplotlib since #25 and #26 made it the default. Drop r-base, r-cran-ggplot2 and python3-rpy2 from the apt install and rpy2/ggplot from requirements_plot.txt, merge the apt layers so the list cleanup takes effect, and skip the pip cache. Image size (local build): 5.67 GB -> 1.75 GB
sebastian-nagel
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Sep 23, 2026
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+1 Thanks, @malteos!
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Summary
Since #25 replaced ggplot2 with matplotlib and #26 made matplotlib the default plot library, the R toolchain in the stats image has been dead weight. This PR removes it.
stats.Dockerfile: dropr-base,r-cran-ggplot2andpython3-rpy2; merge the two apt layers sorm -rf /var/lib/apt/lists/*takes effect; add--no-install-recommendsand pip--no-cache-dir.requirements_plot.txt: droprpy2(needs R to build) and the deprecatedggplotpackage.git,jq,awscli,graphviz-dev(pygraphviz) and the fonts used by matplotlib are kept. No Python code is changed; therpy2.ggplot2branches are lazily imported and never run withPLOTLIB=matplotlib.Image size
Local podman builds of the same commit (linux/arm64, uncompressed):
Verification
R/Rscriptin the image;pip listshows no rpy2/ggplot;matplotlib,pandas,pygraphviz,fsspecimport fine; Liberation Sans is resolved by matplotlib.python -m pytest -s tests/, as in CI).get_stats_and_plot.shpipeline over all 128 crawls in both the old and the new image. All 30 PNGs and every CSV/HTML/MD output are byte-identical to the committed files.