scarf Posts

scarf

•Created by scarf on 1/31/2025 in #help

workaround for ts-node in package.json script

1. many existing projects use package.json script with ts-node. 2. due to https://github.com/denoland/deno/issues/17176 deno can't run them.

"compile:typebox": "ts-node cases/typebox/index.ts cases/typebox/build",

"compile:typebox": "ts-node cases/typebox/index.ts cases/typebox/build",

have anyone found workaround to run this? i've considered

// replace ts-node with run.sh in scripts
#!/bin/sh

case $JS_RUNNER in
    "deno") deno run -A $@ ;;
    "bun" ) bunx        $@ ;;
    *     ) npx ts-node $@ ;;
esac

// replace ts-node with run.sh in scripts
#!/bin/sh

case $JS_RUNNER in
    "deno") deno run -A $@ ;;
    "bun" ) bunx        $@ ;;
    *     ) npx ts-node $@ ;;
esac

but it complicates everything. related: https://github.com/denoland/deno/issues/27166 this is esp. problematic as existing node project still needs ts-node. if only there were a way to shim ts-node to deno...

3 replies

DDeno

•Created by scarf on 1/31/2025 in #help

`--unstable-sloppy-import` not working

scarf@fedora ~> deno repl --no-lock --unstable-sloppy-imports 
Deno 2.1.9
exit using ctrl+d, ctrl+c, or close()
> import { pipe } from 'npm:fp-ts/function'
Uncaught TypeError: Directory import /var/home/scarf/.cache/deno/npm/registry.npmjs.org/fp-ts/2.16.9/function
  Caused by:
    Is a directory (os error 21)
    at async <anonymous>:1:39
>

scarf@fedora ~> deno repl --no-lock --unstable-sloppy-imports 
Deno 2.1.9
exit using ctrl+d, ctrl+c, or close()
> import { pipe } from 'npm:fp-ts/function'
Uncaught TypeError: Directory import /var/home/scarf/.cache/deno/npm/registry.npmjs.org/fp-ts/2.16.9/function
  Caused by:
    Is a directory (os error 21)
    at async <anonymous>:1:39
>

6 replies

DDeno

•Created by scarf on 12/25/2024 in #help

std JSON serializer/deserializer with Set and Map support

does jsr/std have functions to serialize and deserialize sets and maps? like https://github.com/denostack/superserial but for standard library

6 replies

DDeno

•Created by scarf on 5/22/2024 in #help

type checking `.js` files using `d.ts` files

would it be possible to type check javascript files using d.ts files?

// add.js
/// <reference types="./add.d.ts" />
const add = (a) => a + 1

// add.js
/// <reference types="./add.d.ts" />
const add = (a) => a + 1

// add.d.ts
export declare const add: (a: number) => number

// add.d.ts
export declare const add: (a: number) => number

importing add from add.js from consumer will type check but

1 replies

DDeno

•Created by scarf on 12/12/2023 in #help

deno info depth

5 replies

DDeno

•Created by scarf on 10/17/2023 in #help

rust ffi buffer overflow

hi, do i have to null-terminate array when using rust ffi? i'm getting buffer overflows.

#[no_mangle]
pub extern "C" fn play(path: *const u8) {
    let path = unsafe {
        assert!(!path.is_null());

        std::ffi::CStr::from_ptr(path as *const i8)
    };
    let path = path.to_str().unwrap();
    println!("path: {path}");
}

#[no_mangle]
pub extern "C" fn play(path: *const u8) {
    let path = unsafe {
        assert!(!path.is_null());

        std::ffi::CStr::from_ptr(path as *const i8)
    };
    let path = path.to_str().unwrap();
    println!("path: {path}");
}

const lib = "./audio/target/debug/libaudio.so"
const dylib = Deno.dlopen(lib, { "play": { parameters: ["buffer"], result: "void" } } as const)

const encoded = new TextEncoder().encode("path")

dylib.symbols.play(encoded)

const lib = "./audio/target/debug/libaudio.so"
const dylib = Deno.dlopen(lib, { "play": { parameters: ["buffer"], result: "void" } } as const)

const encoded = new TextEncoder().encode("path")

dylib.symbols.play(encoded)

$ deno run -A --unstable --allow-ffi audio.ts
thread '<unnamed>' panicked at src/lib.rs:29:30:
called `Result::unwrap()` on an `Err` value: Utf8Error { valid_up_to: 3, error_len: Some(1) }
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
fatal runtime error: failed to initiate panic, error 5

$ deno run -A --unstable --allow-ffi audio.ts
thread '<unnamed>' panicked at src/lib.rs:29:30:
called `Result::unwrap()` on an `Err` value: Utf8Error { valid_up_to: 3, error_len: Some(1) }
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
fatal runtime error: failed to initiate panic, error 5

4 replies

DDeno

•Created by scarf on 8/7/2023 in #help

restrict path applied for import maps