check-code-messages.yml
Diff-scoped, warn-only check that keeps warnings and non-output messages out of rendered code. The lab’s rule (Ezra, 2026-10-26) is that rendered code shows its output and nothing else. The commonest case is the “geom_smooth() using formula = ‘y ~ x’” message, which disappears when the call names its method and formula.
The source lint flags, in the R chunks of .qmd, .Rmd and .md files and in .R files:
geom_smooth()orstat_smooth()missingmethodorformula;geom_histogram()orstat_bin()with none ofbins,binwidthandbreaks.
It reads a call across lines up to its closing parenthesis, and reports a call only when the pull request adds a line inside it. Prose, inline code and non-R chunks are not read.
Scanning a rendered site
The check-code-messages composite action also takes site-dir, a directory of rendered HTML such as _site. It flags every Quarto cell-output-stderr block, where knitr, reticulate and Jupyter put all warnings and messages, and the text of the two messages above. The scan always covers the whole directory, so run it after a render, and set site-ignore to skip pages. The reusable workflow does not render, so a repository that wants the scan calls the action in its own render job.
Inputs
| Input | Meaning |
|---|---|
globs |
Space-separated pathspecs to lint (default *.qmd *.Rmd *.R) |
fail |
Fail on a finding instead of warning (default false) |
whole-tree |
Lint every tracked file, not just a PR’s additions |
runs-on, python-version |
Runner and Python version |