Regenerates test/fixtures/golden/*.json and test/fixtures/js_math.json
from an upstream checkout, by running tools/gen_golden.mjs and
tools/gen_js_math.mjs under Node.
mix ascii.golden # every piece
mix ascii.golden donut cube # some piecesOptions
--upstream DIR- the upstream checkout (defaulttmp/upstream)--node PATH- the Node to run (default$NODE, thennode). It must be an x64 build of Node 22.18 or later; seePORTING.md.
This is a development tool: mix test reads the committed fixtures and
never needs Node.