FilesExpand file tree

 next

/

lib.js

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

50 lines (44 loc) · 1.48 KB

 next

/

lib.js

Copy path

Top

File metadata and controls

• Code
• Blame

50 lines (44 loc) · 1.48 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

const SwiftRuntime = require("javascript-kit-swift").SwiftRuntime;

const WASI = require("@wasmer/wasi").WASI;

const WasmFs = require("@wasmer/wasmfs").WasmFs;

const promisify = require("util").promisify;

const fs = require("fs");

const readFile = promisify(fs.readFile);

const startWasiTask = async (wasmPath) => {

// Instantiate a new WASI Instance

const wasmFs = new WasmFs();

// Output stdout and stderr to console

const originalWriteSync = wasmFs.fs.writeSync;

wasmFs.fs.writeSync = (fd, buffer, offset, length, position) => {

const text = new TextDecoder("utf-8").decode(buffer);

switch (fd) {

case 1:

console.log(text);

break;

case 2:

console.error(text);

break;

}

return originalWriteSync(fd, buffer, offset, length, position);

};

let wasi = new WASI({

args: [],

env: {},

bindings: {

...WASI.defaultBindings,

fs: wasmFs.fs,

},

});

const swift = new SwiftRuntime();

// Fetch our Wasm File

const wasmBinary = await readFile(wasmPath);

// Instantiate the WebAssembly file

let { instance } = await WebAssembly.instantiate(wasmBinary, {

wasi_snapshot_preview1: wasi.wasiImport,

javascript_kit: swift.importObjects(),

});

swift.setInstance(instance);

// Start the WebAssembly WASI instance!

wasi.start(instance);

};

module.exports = { startWasiTask };