♻️ inline WASM binary into generated TypeScript module

Replace runtime filesystem read of clayterm.wasm with a build step
that base64-encodes the binary into wasm.ts. This removes the
node:fs/promises dependency and --allow-read requirement for the
WASM file.

Author: cowboyd

.gitignore

@@ -1,4 +1,5 @@
 /.agent-shell/
 /clayterm.wasm
+/wasm.ts
 /build/
 /node_modules/

Makefile

@@ -13,15 +13,18 @@ LDFLAGS = -Wl,--no-entry \
           -Wl,--undefined=Clay__MeasureText \
           -Wl,--undefined=Clay__QueryScrollOffset
 
-all: $(TARGET)
+all: $(TARGET) wasm.ts
 	@echo "Built $(TARGET) ($$(wc -c < $(TARGET)) bytes)"
 
 DEPS = $(wildcard src/*.c src/*.h)
 
 $(TARGET): $(DEPS)
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(SRC)
 
+wasm.ts: $(TARGET)
+	deno run --allow-read --allow-write tasks/encode-wasm.ts
+
 clean:
-	rm -f $(TARGET)
+	rm -f $(TARGET) wasm.ts
 
 .PHONY: all clean

deno.lock

@@ -44,4 +44,3 @@ await build({
 });
 
 await Deno.copyFile("README.md", `${outDir}/README.md`);
-await Deno.copyFile("clayterm.wasm", `${outDir}/esm/clayterm.wasm`);

tasks/build-npm.ts

@@ -0,0 +1,12 @@
+import { encodeBase64 } from "jsr:@std/encoding/base64";
+
+const wasm = await Deno.readFile("clayterm.wasm");
+const base64 = encodeBase64(wasm);
+
+const source = `const base64 = "${base64}";
+const bytes = Uint8Array.from(atob(base64), (c) => c.charCodeAt(0));
+export const compiled = await WebAssembly.compile(bytes);
+`;
+
+await Deno.writeTextFile("wasm.ts", source);
+console.log(`wrote wasm.ts (${wasm.length} bytes encoded)`);