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move hs2js package here + improve readme

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examples/buildless/hs2js.html
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<script src="https://unpkg.com/hs2js@0.0.3"></script>
<button id="hello">hello</button>
<script>
hs2js.setBase('https://unpkg.com/hs2js@0.0.3/dist/');
document.addEventListener('click', async () => {
window.log = (s) => console.log(s);
await hs2js.evaluate('log "hello from haskell!"');
hs2js.loadParser();
document.getElementById('hello').addEventListener('click', () => {
hs2js.evaluate('alert "hello from haskell!"');
});
</script>

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packages/hs2js/LICENSE Normal file
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You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<https://www.gnu.org/licenses/>.

49
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@ -0,0 +1,49 @@
# hs2js
Experimental haskell in javascript interpreter.
## Usage
### Via Script Tag
You can load the library directly from a script tag via unpkg:
```html
<script src="https://unpkg.com/hs2js@0.0.3"></script>
<button id="hello">hello</button>
<script>
hs2js.setBase('https://unpkg.com/hs2js@0.0.3/dist/');
hs2js.loadParser();
document.getElementById('hello').addEventListener('click', () => {
hs2js.evaluate('alert "hello from haskell!"');
});
</script>
```
### Via npm
You need to add `postinstall` to your `package.json` script to copy the parser to your `public` folder:
```json
{
"scripts": {
"postinstall": "cp node_modules/hs2js/dist/tree-sitter.wasm public && cp node_modules/hs2js/dist/tree-sitter-haskell.wasm public"
}
}
```
Depending on your setup, replace `public` with the folder that will serve your assets to `/`. Then install the package:
```sh
npm i hs2js
```
and use it:
```js
import * as hs2js from 'hs2js';
hs2js.loadParser();
document.getElementById('hello').addEventListener('click', () => {
hs2js.evaluate('alert "hello from haskell!"');
});
```

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{
"name": "hs2js",
"version": "0.0.4",
"description": "Experimental Haskell in JavaScript interpreter",
"main": "dist/index.js",
"module": "dist/index.mjs",
"scripts": {
"build-wasm": "tree-sitter build-wasm node_modules/tree-sitter-haskell && mv tree-sitter-haskell.wasm ./dist/ && cp node_modules/web-tree-sitter/tree-sitter.wasm ./dist/",
"build": "vite build && npm run build-wasm",
"prepublishOnly": "npm run build"
},
"repository": {
"type": "git",
"url": "git+https://github.com/felixroos/hs2js.git"
},
"keywords": [
"haskell",
"javascript"
],
"author": "Felix Roos <flix91@gmail.com>",
"license": "AGPL-3.0-or-later",
"bugs": {
"url": "https://github.com/tidalcycles/strudel/issues"
},
"homepage": "https://github.com/tidalcycles/strudel/tree/main/packages/hs2js",
"dependencies": {
"web-tree-sitter": "^0.20.8"
},
"devDependencies": {
"vite": "^5.0.10",
"tree-sitter-haskell": "^0.21.0"
}
}

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'@rollup/rollup-linux-x64-gnu': 4.17.2
'@rollup/rollup-linux-x64-musl': 4.17.2
'@rollup/rollup-win32-arm64-msvc': 4.17.2
'@rollup/rollup-win32-ia32-msvc': 4.17.2
'@rollup/rollup-win32-x64-msvc': 4.17.2
fsevents: 2.3.3
dev: true
/source-map-js@1.2.0:
resolution: {integrity: sha512-itJW8lvSA0TXEphiRoawsCksnlf8SyvmFzIhltqAHluXd88pkCd+cXJVHTDwdCr0IzwptSm035IHQktUu1QUMg==}
engines: {node: '>=0.10.0'}
dev: true
/tree-sitter-haskell@0.21.0(tree-sitter@0.21.1):
resolution: {integrity: sha512-b2RLegPHuYPh7nJ3YKWgkWnFYxmYlQDE8TDJuNH+iuNuBcCMYyaA9JlJlMHfCvf7DmJNPtqqbO9Kh9NXEmbatQ==}
requiresBuild: true
peerDependencies:
tree-sitter: ^0.21.0
tree_sitter: '*'
peerDependenciesMeta:
tree_sitter:
optional: true
dependencies:
node-addon-api: 8.0.0
node-gyp-build: 4.8.1
tree-sitter: 0.21.1
dev: true
/tree-sitter@0.21.1:
resolution: {integrity: sha512-7dxoA6kYvtgWw80265MyqJlkRl4yawIjO7S5MigytjELkX43fV2WsAXzsNfO7sBpPPCF5Gp0+XzHk0DwLCq3xQ==}
requiresBuild: true
dependencies:
node-addon-api: 8.0.0
node-gyp-build: 4.8.1
dev: true
/vite@5.2.11:
resolution: {integrity: sha512-HndV31LWW05i1BLPMUCE1B9E9GFbOu1MbenhS58FuK6owSO5qHm7GiCotrNY1YE5rMeQSFBGmT5ZaLEjFizgiQ==}
engines: {node: ^18.0.0 || >=20.0.0}
hasBin: true
peerDependencies:
'@types/node': ^18.0.0 || >=20.0.0
less: '*'
lightningcss: ^1.21.0
sass: '*'
stylus: '*'
sugarss: '*'
terser: ^5.4.0
peerDependenciesMeta:
'@types/node':
optional: true
less:
optional: true
lightningcss:
optional: true
sass:
optional: true
stylus:
optional: true
sugarss:
optional: true
terser:
optional: true
dependencies:
esbuild: 0.20.2
postcss: 8.4.38
rollup: 4.17.2
optionalDependencies:
fsevents: 2.3.3
dev: true
/web-tree-sitter@0.20.8:
resolution: {integrity: sha512-weOVgZ3aAARgdnb220GqYuh7+rZU0Ka9k9yfKtGAzEYMa6GgiCzW9JjQRJyCJakvibQW+dfjJdihjInKuuCAUQ==}
dev: false

139
packages/hs2js/src/hs2js.mjs Normal file
View File

@ -0,0 +1,139 @@
import { parse } from "./parser.mjs";
function runApply(node, scope, ops) {
if (node.children.length !== 2)
throw new Error(
`expected 2 children for node type apply, got ${node.children.length}`
);
const [fn, arg] = node.children.map((child) => run(child, scope, ops));
if (typeof fn !== "function") {
throw new Error(`${node.children[0].text} is not a function`);
}
// only works if fn is curried!
return fn(arg);
}
function runInfix(left, symbol, right, ops) {
const customOp = ops[symbol];
if (customOp) {
return customOp(left, right);
}
switch (symbol) {
case "+":
return left + right;
case "-":
return left - right;
case "*":
return left * right;
case "/":
return left / right;
case "$":
return left(right);
case "&":
console.log("right", right);
return right(left);
case ".":
return (x) => left(right(x));
default:
throw new Error("unexpected infix operator " + symbol);
}
}
function curry(patterns, body, scope, ops) {
const [variable, ...rest] = patterns;
return (arg) => {
let _scope = { ...scope, [variable.text]: arg };
if (patterns.length === 1) {
const result = run(body, _scope, ops);
return result;
}
return curry(rest, body, _scope, ops);
};
}
export function run(node, scope, ops = {}) {
let runInScope = (node, scp = scope) => run(node, scp, ops);
//console.log("node", node.type, node.text);
switch (node.type) {
case "ERROR":
throw new Error(`invalid syntax: "${node.text}"`);
case "declarations":
let result;
node.children.forEach((declaration) => {
result = runInScope(declaration);
});
return result;
case "integer":
return Number(node.text);
case "float":
return Number(node.text);
case "string":
const str = node.text.slice(1, -1);
return String(str);
case "lambda":
const [_, lpatterns, __, lbody] = node.children;
return curry(lpatterns.children, lbody, scope, ops);
case "function":
const [fvariable, fpatterns, fbody] = node.children;
scope[fvariable.text] = curry(fpatterns.children, fbody, scope, ops);
return scope[fvariable.text];
case "list": {
return node.children
.filter((_, i) => i % 2 === 1) // elements are at odd indices
.map((node) => runInScope(node));
}
case "match":
if (node.children[0].text !== "=" || node.children.length !== 2) {
throw new Error("match node so far only support simple assignments");
}
return runInScope(node.children[1]);
case "bind":
if (node.children.length !== 2)
throw new Error("expected 2 children for node type bind");
if (node.children[0].type !== "variable")
throw new Error("expected variable as first child of bind node");
if (node.children[1].type !== "match")
throw new Error("expected match as first child of bind node");
const [bvariable, bmatch] = node.children;
const value = runInScope(bmatch);
scope[bvariable.text] = value;
return value;
case "variable":
return scope[node.text];
case "infix": {
const [a, op, b] = node.children;
const symbol = op.text;
const [left, right] = [runInScope(a), runInScope(b)];
return runInfix(left, symbol, right, ops);
}
case "apply":
return runApply(node, scope, ops);
case "left_section": {
const [_, b, op] = node.children;
const right = runInScope(b);
return (left) => runInfix(left, op.text, right, ops);
}
case "right_section": {
const [_, op, b] = node.children;
const right = runInScope(b);
return (left) => runInfix(left, op.text, right, ops);
}
case "parens":
if (node.children.length !== 3)
throw new Error("expected 3 children for node type parens");
return runInScope(node.children[1]);
default:
if (node.children.length === 0) {
throw new Error("unhandled leaf type " + node.type);
}
if (node.children.length > 1) {
throw new Error("unhandled branch type " + node.type);
}
return runInScope(node.children[0]);
}
}
export async function evaluate(haskellCode, scope = globalThis, ops) {
const ast = await parse(haskellCode);
return run(ast.rootNode, scope, ops);
}

2
packages/hs2js/src/index.mjs Normal file
View File

@ -0,0 +1,2 @@
export * from "./hs2js.mjs";
export * from "./parser.mjs";

37
packages/hs2js/src/parser.mjs Normal file
View File

@ -0,0 +1,37 @@
import Parser from "web-tree-sitter";
let base = "/";
export function setBase(path) {
base = path;
}
async function _loadParser() {
await Parser.init({
locateFile(scriptName, scriptDirectory) {
return `${base}${scriptName}`;
},
});
const parser = new Parser();
const Lang = await Parser.Language.load(`${base}tree-sitter-haskell.wasm`);
parser.setLanguage(Lang);
return parser;
}
let parserLoaded;
export function loadParser() {
if (!parserLoaded) {
parserLoaded = _loadParser();
}
return parserLoaded;
}
export async function parse(code) {
const parser = await loadParser();
// for some reason, the parser doesn't like new lines..
return parser.parse(
code
.replaceAll("\n\n", "~~~~")
.replaceAll("\n", "")
.replaceAll("~~~~", "\n")
);
}

20
packages/hs2js/vite.config.mjs Normal file
View File

@ -0,0 +1,20 @@
import { defineConfig } from "vite";
import { resolve } from "path";
// https://vitejs.dev/config/
export default defineConfig({
plugins: [],
build: {
lib: {
entry: resolve(__dirname, "src", "index.mjs"),
name: "hs2js",
formats: ["es", "iife"],
fileName: (ext) => ({ es: "index.mjs", iife: "index.js" }[ext]),
},
rollupOptions: {
// external: [...Object.keys(dependencies)],
plugins: [],
},
target: "esnext",
},
});

3
packages/tidal/main.js
View File

@ -1,6 +1,5 @@
import { run } from './hs2js.mjs';
import { run, parse } from 'hs2js';
import { renderGraph } from './graph.mjs';
import { parse } from './parser.mjs';
import { initStrudel, reify, late, samples, stack } from '@strudel/web';
initStrudel({
prebake: () => samples('github:tidalcycles/dirt-samples'),

10
packages/tidal/package.json
View File

@ -7,8 +7,7 @@
"dev": "vite",
"build": "vite build",
"preview": "vite preview",
"postinstall": "cp node_modules/web-tree-sitter/tree-sitter.wasm public && npm run build:parser",
"build:parser": "tree-sitter build-wasm node_modules/tree-sitter-haskell && mv tree-sitter-haskell.wasm public"
"postinstall": "cp node_modules/hs2js/dist/tree-sitter.wasm public && cp node_modules/hs2js/dist/tree-sitter-haskell.wasm public"
},
"repository": {
"type": "git",
@ -30,13 +29,10 @@
"dependencies": {
"@hpcc-js/wasm": "^2.15.3",
"jgf-dot": "^1.1.1",
"web-tree-sitter": "^0.22.6",
"tree-sitter-haskell": "^0.21.0",
"@strudel/web": "workspace:*"
"@strudel/web": "workspace:*",
"hs2js": "workspace:*"
},
"devDependencies": {
"tree-sitter": "^0.21.1",
"tree-sitter-cli": "^0.20.8",
"vite": "^5.0.8"
}
}

43
pnpm-lock.yaml generated
View File

@ -251,6 +251,19 @@ importers:
packages/embed: {}
packages/hs2js:
dependencies:
web-tree-sitter:
specifier: ^0.20.8
version: 0.20.8
devDependencies:
tree-sitter-haskell:
specifier: ^0.21.0
version: 0.21.0(tree-sitter@0.21.1)
vite:
specifier: ^5.0.10
version: 5.2.2(@types/node@20.10.6)
packages/hydra:
dependencies:
'@strudel/core':
@ -417,22 +430,13 @@ importers:
'@strudel/web':
specifier: workspace:*
version: link:../web
hs2js:
specifier: workspace:*
version: link:../hs2js
jgf-dot:
specifier: ^1.1.1
version: 1.1.1
tree-sitter-haskell:
specifier: ^0.21.0
version: 0.21.0(tree-sitter@0.21.1)
web-tree-sitter:
specifier: ^0.22.6
version: 0.22.6
devDependencies:
tree-sitter:
specifier: ^0.21.1
version: 0.21.1
tree-sitter-cli:
specifier: ^0.20.8
version: 0.20.8
vite:
specifier: ^5.0.8
version: 5.2.2(@types/node@20.10.6)
@ -10730,6 +10734,7 @@ packages:
/node-addon-api@8.0.0:
resolution: {integrity: sha512-ipO7rsHEBqa9STO5C5T10fj732ml+5kLN1cAG8/jdHd56ldQeGj3Q7+scUS+VHK/qy1zLEwC4wMK5+yM0btPvw==}
engines: {node: ^18 || ^20 || >= 21}
dev: true
/node-domexception@1.0.0:
resolution: {integrity: sha512-/jKZoMpw0F8GRwl4/eLROPA3cfcXtLApP0QzLmUT/HuPCZWyB7IY9ZrMeKw2O/nFIqPQB3PVM9aYm0F312AXDQ==}
@ -10777,6 +10782,7 @@ packages:
/node-gyp-build@4.8.1:
resolution: {integrity: sha512-OSs33Z9yWr148JZcbZd5WiAXhh/n9z8TxQcdMhIOlpN9AhWpLfvVFO73+m77bBABQMaY9XSvIa+qk0jlI7Gcaw==}
hasBin: true
dev: true
/node-gyp@10.0.1:
resolution: {integrity: sha512-gg3/bHehQfZivQVfqIyy8wTdSymF9yTyP4CJifK73imyNMU8AIGQE2pUa7dNWfmMeG9cDVF2eehiRMv0LC1iAg==}
@ -13507,12 +13513,6 @@ packages:
punycode: 2.3.1
dev: true
/tree-sitter-cli@0.20.8:
resolution: {integrity: sha512-XjTcS3wdTy/2cc/ptMLc/WRyOLECRYcMTrSWyhZnj1oGSOWbHLTklgsgRICU3cPfb0vy+oZCC33M43u6R1HSCA==}
hasBin: true
requiresBuild: true
dev: true
/tree-sitter-haskell@0.21.0(tree-sitter@0.21.1):
resolution: {integrity: sha512-b2RLegPHuYPh7nJ3YKWgkWnFYxmYlQDE8TDJuNH+iuNuBcCMYyaA9JlJlMHfCvf7DmJNPtqqbO9Kh9NXEmbatQ==}
requiresBuild: true
@ -13526,7 +13526,7 @@ packages:
node-addon-api: 8.0.0
node-gyp-build: 4.8.1
tree-sitter: 0.21.1
dev: false
dev: true
/tree-sitter@0.21.1:
resolution: {integrity: sha512-7dxoA6kYvtgWw80265MyqJlkRl4yawIjO7S5MigytjELkX43fV2WsAXzsNfO7sBpPPCF5Gp0+XzHk0DwLCq3xQ==}
@ -13534,6 +13534,7 @@ packages:
dependencies:
node-addon-api: 8.0.0
node-gyp-build: 4.8.1
dev: true
/trim-lines@3.0.1:
resolution: {integrity: sha512-kRj8B+YHZCc9kQYdWfJB2/oUl9rA99qbowYYBtr4ui4mZyAQ2JpvVBd/6U2YloATfqBhBTSMhTpgBHtU0Mf3Rg==}
@ -14333,10 +14334,6 @@ packages:
resolution: {integrity: sha512-weOVgZ3aAARgdnb220GqYuh7+rZU0Ka9k9yfKtGAzEYMa6GgiCzW9JjQRJyCJakvibQW+dfjJdihjInKuuCAUQ==}
dev: false
/web-tree-sitter@0.22.6:
resolution: {integrity: sha512-hS87TH71Zd6mGAmYCvlgxeGDjqd9GTeqXNqTT+u0Gs51uIozNIaaq/kUAbV/Zf56jb2ZOyG8BxZs2GG9wbLi6Q==}
dev: false
/webidl-conversions@3.0.1:
resolution: {integrity: sha512-2JAn3z8AR6rjK8Sm8orRC0h/bcl/DqL7tRPdGZ4I1CjdF+EaMLmYxBHyXuKL849eucPFhvBoxMsflfOb8kxaeQ==}