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Oxicloud/scripts/build-wasm.sh
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#!/usr/bin/env bash
# Rebuild the vendored BLAKE3 WASM module (static/js/vendors/hash-wasm/).
#
# The generated artifacts ARE committed — like the other vendored modules
# (pdf.js) — so regular frontend/backend builds never need the wasm
# toolchain. Re-run this script only when wasm/oxicloud-hash/ changes
# (e.g. bumping the blake3 crate, or adding FastCDC for the delta-sync
# client) and commit the regenerated files.
#
# Requirements (one-time):
# rustup target add wasm32-unknown-unknown
# cargo install wasm-bindgen-cli --locked
#
# wasm-bindgen-cli's version must match the crate's `wasm-bindgen`
# dependency; cargo prints a clear error when they drift.
set -euo pipefail
cd "$(dirname "$0")/.."
CRATE=wasm/oxicloud-hash
OUT=static/js/vendors/hash-wasm
# SIMD128 is baseline in every evergreen browser (Chrome 91+, Firefox 89+,
# Safari 16.4+) and is worth ~3-4× in hashing throughput. Browsers without
# it fail instantiation; the frontend detects that and falls back to a
# plain byte upload.
RUSTFLAGS="-C target-feature=+simd128" \
cargo build \
--manifest-path "$CRATE/Cargo.toml" \
--target wasm32-unknown-unknown \
--release
wasm-bindgen \
--target web \
--no-typescript \
--out-dir "$OUT" \
"$CRATE/target/wasm32-unknown-unknown/release/oxicloud_hash_wasm.wasm"
echo "Vendored: $(ls -la "$OUT" | tail -n +2 | awk '{print $9, "("$5" bytes)"}' | xargs)"