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An Advent Of Code runner for gleam

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gladvent src ffi file.gleam
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src/ffi/file.gleam 

import gleam/erlang/charlist.{Charlist}

import gleam/erlang/file.{Reason}

import gleam



pub external type IODevice



pub external fn open_file_exclusive(s: String) -> Result(IODevice, Reason) =

  "gladvent_ffi" "open_file_exclusive"



external fn do_write(IODevice, Charlist) -> Result(Nil, Reason) =

  "gladvent_ffi" "write"



external fn do_ensure_dir(Charlist) -> Result(Nil, Reason) =

  "gladvent_ffi" "ensure_dir"



pub fn write(iod: IODevice, s: String) -> Result(Nil, Reason) {

  do_write(iod, charlist.from_string(s))

}



pub fn ensure_dir(dir: String) -> Result(Nil, Reason) {

  do_ensure_dir(charlist.from_string(dir))

}