ci(doc): cache the opam switch to skip recompiling the dependency tree#1118
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balat wants to merge 1 commit into
Open
ci(doc): cache the opam switch to skip recompiling the dependency tree#1118balat wants to merge 1 commit into
balat wants to merge 1 commit into
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The doc job recompiled the dependency tree plus wodoc and odoc from source on every push; setup-ocaml only caches the base switch. Cache the whole _opam switch keyed on the *.opam files and wodoc's HEAD commit, so a cache hit skips the install and only the project itself is rebuilt. The deps/wodoc rebuild once when an *.opam file or wodoc move, then re-cache.
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Problem
The
Documentationworkflow recompiles the dependency tree plus wodoc and odoc from source on every push (several minutes);setup-ocaml@v3only caches the base switch (the compiler), so none of that was cached.Fix
Cache the whole
_opamswitch withactions/cache, keyed on the*.opamfiles (the dependency set) and wodoc's resolved HEAD commit. On a cache hit the install step is skipped; the project itself is still rebuilt from the checkout bydune build @docin the doc step, so the docs stay current. The cache rebuilds once when an*.opamfile or wodoc's HEAD move.Same change validated on ocsigen.github.io (4 min → ~1 min) and ocsigenserver (5 min → ~1 min, cache hit confirmed). First run on this branch is a cache miss (populates the cache); the speed-up shows on the next run.