43 lines
1.7 KiB
Bash
Executable File
43 lines
1.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Builds the sing-vis WebAssembly engine and stages the static site under web/.
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# After this runs, web/ is fully self-contained and can be served by any static
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# file server (including GitHub Pages) — there is no backend.
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set -euo pipefail
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cd "$(dirname "$0")"
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# The engine's Go dependencies (sing) contain three source files that reference
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# golang.org/x/sys/unix, which has no equivalent for GOARCH=wasm. wasmbuild/
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# supplies wasm-safe stubs and gen-overlay.sh maps them in via `go build
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# -overlay`. Only this wasm build uses the overlay; native builds/tests do not.
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overlay="$(mktemp)"
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trap 'rm -f "$overlay"' EXIT
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bash wasmbuild/gen-overlay.sh > "$overlay"
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echo "building web/singvis.wasm (GOOS=js GOARCH=wasm)…"
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GOOS=js GOARCH=wasm go build -overlay "$overlay" -trimpath -ldflags="-s -w" \
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-o web/singvis.wasm ./cmd/wasm
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# Ship the Go runtime's JS support shim next to the wasm. Newer Go keeps it under
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# lib/wasm; older layouts use misc/wasm.
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goroot="$(go env GOROOT)"
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if [ -f "$goroot/lib/wasm/wasm_exec.js" ]; then
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cp "$goroot/lib/wasm/wasm_exec.js" web/wasm_exec.js
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elif [ -f "$goroot/misc/wasm/wasm_exec.js" ]; then
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cp "$goroot/misc/wasm/wasm_exec.js" web/wasm_exec.js
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else
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echo "error: wasm_exec.js not found under $goroot" >&2
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exit 1
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fi
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# Pre-compress for static hosts that serve .gz when present (the wasm is large;
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# gzip roughly quarters it).
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if command -v gzip >/dev/null 2>&1; then
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gzip -9 -f -k web/singvis.wasm
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fi
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size="$(du -h web/singvis.wasm | cut -f1)"
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gzsize="$( [ -f web/singvis.wasm.gz ] && du -h web/singvis.wasm.gz | cut -f1 || echo n/a )"
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echo "done. web/singvis.wasm=$size (gz=$gzsize), web/wasm_exec.js copied."
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echo "serve the web/ directory statically, e.g.: ./run.sh"
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