wasm-yes

yes command implemented in WebAssembly and WASI

Install

This command is distributed from WAPM.

$ wapm install Syuparn/yes
$ wapm run yes | head -n 3
y
y
y

You can also compile wasm manually from wat file.

$ wasm2wat yes.wat
$ wasmer yes.wasm
y
y
y
...

Usage

Same as the GNU yes command.

# write `y` infinitely
$ wapm run yes
y
y
y
y
y
...

# write argument instead
$ wapm run yes no!
no!
no!
no!
no!
no!
...

About source code

In order to reduce binary size, yes.wat is written by hand.

For developers

You can test generated wasm by bats.

# install wat2wasm and bats
$ npm install

# build wasm
$ npx wat2wasm yes.wat

# run test (requires wasmer)
$ npx bats test/yes.bats
 ✓ yes without argument writes 'y'
 ✓ yes always writes 'y'

2 tests, 0 failures