Maintainer Workflow: Vendoring SIMDe

This vignette is for maintainers of RsimdDispatch itself. Downstream packages should normally use LinkingTo: RsimdDispatch and the copied dispatch template; they do not need to run the vendoring scripts.

RsimdDispatch vendors the full header-only SIMDe include tree in inst/include/simde. The pinned upstream checkout is reported by simde_info() and recorded in inst/vendor/simde/VERSION:

RsimdDispatch::simde_info()[c("version", "commit", "date", "repository")]
#> $version
#> [1] "0.8.4"
#> 
#> $commit
#> [1] "f3e8262173b7089db9a9d57a9ecef8dd07ad9c97"
#> 
#> $date
#> [1] "2026-05-10"
#> 
#> $repository
#> [1] "https://github.com/simd-everywhere/simde"

The update flow is explicit:

Rscript tools/vendor-simde.R
Rscript tools/update-authors.R

tools/vendor-simde.R checks out the pinned SIMDe commit, copies the full simde/ include tree into inst/include/simde, and stores upstream provenance under inst/vendor/simde.

tools/update-authors.R regenerates:

inst/AUTHORS
inst/LICENCE.note

These files document bundled SIMDe authorship, contributors, the upstream license file, and the vendored commit. Local changes to vendored headers should not be made silently; update the vendoring script or record patches explicitly.