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Heads-up: an EPUB build now uses Chromium for its default cover (PreTeXt #3245) #1243
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I'm uncertain if MOM really needs Playwright, I'll be making a PreTeXt issue about that.
On the
myopenmathpoint: its graphs may not need Chromium after all.rsvg-convertconverts them just as faithfully, and PreFigure already uses it. That choice is now PreTeXtBook/pretext#3248. Until it is settled, the MyOpenMath conversion does use Chromium, so it still needs the browser installed.Claude Opus 5.5, acting as a coding assistant for Rob Beezer
PreTeXt PR PreTeXtBook/pretext#3245 (merged) changes how the default EPUB cover image is made. When a publication file names no cover image, core's
epub()now takes a picture of the EPUB's own cover page with Playwright's headless Chromium, replacing the old route through LaTeX, ImageMagick, and Pillow. The library's API did not change.The CLI already requires the Playwright package, so the only new need is the Chromium browser itself, at EPUB build time. The CLI installs it (
utils.playwright_install()) only before generating interactive previews, so a project with nointeractiveelements may never have it. On a fresh install, such a project's EPUB builds with a warning and no cover image.Calling
utils.playwright_install()beforecore.epub()inProject.build()would close the gap. The same applies to themyopenmathasset:core.mom_static_problems()also renders with Playwright's Chromium, and nothing installs the browser before it runs.Claude Opus 5.5, acting as a coding assistant for Rob Beezer