Merge branch 'feat/p1-wasm' into feat/p1-proof

# Conflicts:
#	Cargo.toml
#	scripts/ci-test.sh

scripts/ci-test.sh

@@ -108,14 +108,17 @@ run_step "cargo clippy (fast-deflate / zlib-ng)" cargo clippy \
 # that: fail if a crate that compiles C (a *-sys crate, cc or cmake) enters the
 # default dependency tree of any of them. clawhdf5-migrate (bundled SQLite),
 # clawhdf5-napi (Node) and clawhdf5-gpu (graphics drivers) are exempt.
+# js-sys (clawhdf5-wasm's bindings to JavaScript) builds no C.
 no_c_in_default_build() {
     local crate found=0
     for crate in clawhdf5-format clawhdf5-io clawhdf5-filters clawhdf5 \
         clawhdf5-agent clawhdf5-ann clawhdf5-accel clawhdf5-netcdf4 clawhdf5-cli \
-        clawhdf5-tools; do
+        clawhdf5-tools \
+        clawhdf5-wasm; do
         local c_deps
         c_deps=$(cargo tree -q -p "$crate" -e normal,build --prefix none \
-            | grep -E '^([a-z0-9_-]+-sys|cc|cmake) v' | sort -u)
+            | grep -E '^([a-z0-9_-]+-sys|cc|cmake) v' \
+            | grep -v '^js-sys v' | sort -u)
         if [ -n "$c_deps" ]; then
             echo "$crate pulls in C by default:"
             echo "$c_deps" | sed 's/^/    /'
@@ -126,6 +129,33 @@ no_c_in_default_build() {
 }
 run_step "no C in the default build (core crates)" no_c_in_default_build
 
+# The reader in the browser: the facade's read path must build for
+# wasm32-unknown-unknown (no mmap, no threads, no file system), and the
+# wasm-bindgen crate must build and lint there. Needs
+# `rustup target add wasm32-unknown-unknown`.
+run_step "wasm32 build (clawhdf5, no default features)" cargo build \
+    -p clawhdf5 \
+    --target wasm32-unknown-unknown \
+    --no-default-features
+run_step "wasm32 clippy (clawhdf5-wasm)" cargo clippy \
+    -p clawhdf5-wasm \
+    --target wasm32-unknown-unknown \
+    --all-targets \
+    -- -D warnings
+
+# The built wasm package, run under Node against h5py/netCDF4-written files,
+# and the viewer page in headless Chromium when one is found.
+# Needs node and the wasm-bindgen CLI, which the CI container does not have;
+# the same expectations are checked natively by clawhdf5-wasm's h5py_interop
+# test in the cargo test step.
+if command -v node >/dev/null && command -v wasm-bindgen >/dev/null; then
+    run_step "wasm package under Node (+ browser)" bash "$SCRIPT_DIR/../examples/wasm-viewer/test/run.sh"
+else
+    echo ""
+    echo "==> [wasm package under Node] SKIPPED: needs node and wasm-bindgen"
+    STEPS+=("SKIP: wasm package under Node")
+fi
+
 # The workspace declares a minimum Rust version (rust-version in Cargo.toml);
 # check that it really builds there, so the README badge and the manifests
 # cannot drift from the truth. Separate target dir: a different toolchain