Add npm packaging

Author: yurydelendik

wasm/.gitignore

@@ -1,3 +1,4 @@
 *.sass
 *.css
 *.css.map
+pkg/

wasm/Makefile

@@ -11,8 +11,19 @@ build:
 
 clean:
 	$(MAKE) -C .. $(MAKE_OPTS) clean-all
+	rf -f pkg/
 
 wasi_polyfill.wasm: wasi_polyfill.wat
 	$(WABT)/bin/wat2wasm wasi_polyfill.wat -o wasi_polyfill.wasm
 
-.PHONY: build clean
+pack: wasi_polyfill.wasm build
+	mkdir -p pkg
+	cp package.json.in pkg/package.json
+	touch pkg/index.js
+	mkdir -p pkg/sassc/bin
+	cp ../sassc/bin/sassc.wasm pkg/sassc/bin/
+	mkdir -p pkg/wasm
+	cp cli.js wasi_polyfill.js wasi_polyfill.wasm pkg/wasm/
+	echo "cd pkg && npm publish"
+
+.PHONY: build clean pack

wasm/README.md

@@ -12,11 +12,15 @@ To rebuild `wasi_polyfill.wasm`: `make wasi_polyfill.wasm`
 Examples:
 
 ```
-node run.js -v
-node run.js $PWD/test.sass
-node run.js $PWD/test.sass $PWD/test.css
+node cli.js -v
+node cli.js $PWD/test.sass
+node cli.js $PWD/test.sass $PWD/test.css
 ```
 
 Note: Use full path for the file names and only in the current dir (hence `$PWD/` prefix).
 
+# wasi-sdk prerequisite
 
+Clone, build and install the [wask-sdk](https://github.com/CraneStation/wasi-sdk), e.g. `make PREFIX=~/bin wasi-sdk/ LLVM_PROJ_DIR=~/Work/llvm-project/`
+
+Note: used `bdaa39ea6ca4` commit of llvm-project, older versions (e.g. LLVM 8 used by wasi-sdk) when used causing the "std::__2::random_device::random_device" error.

wasm/run.js renamed to wasm/cli.js

@@ -1,17 +1,20 @@
+#!/usr/bin/env node
 const wp = require('./wasi_polyfill.js');
 const fs = require('fs');
+const path = require('path');
 
 async function init() {
   const host = new wp.createWasiHost();
   const { instance: wrapper } = await WebAssembly.instantiate(
-    fs.readFileSync("wasi_polyfill.wasm"),
+    fs.readFileSync(path.join(__dirname, "wasi_polyfill.wasm")),
     {"wasi_polyfill": host}
   );
+  const wasmPath = path.join(__dirname, "../sassc/bin/sassc.wasm");
   const { instance: sassc } = await WebAssembly.instantiate(
-    fs.readFileSync("../sassc/bin/sassc.wasm"),
+    fs.readFileSync(wasmPath),
     {"wasi_unstable": wrapper.exports}
   );
-  host.args = ["../sassc/bin/sassc.wasm", ...process.argv.slice(2)];
+  host.args = [wasmPath, ...process.argv.slice(2)];
   host.memory = sassc.exports.memory;
   return sassc.exports;
 }

wasm/package.json.in

@@ -0,0 +1,19 @@
+{
+  "name": "sassc-wasi",
+  "version": "0.1.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "bin": {
+    "sassc-wasi": "./wasm/cli.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/yurydelendik/libsass.git"
+  },
+  "author": "",
+  "license": "ISC",
+  "homepage": "https://github.com/yurydelendik/libsass/tree/wasi/wasm"
+}