sigoden

我没有时间实现，但欢迎pr。

use [`std::env::temp_dir`](https://doc.rust-lang.org/std/env/fn.temp_dir.html)

It seems that `cam.stop` must have a callback as argument.

I don't know haiku very well. Give me some time to consider whether to merge.

I disabled it for simplicity, since you asked for it, I will enable it later

Argc use bash `eval $(argc --argc-eval "$0" "$@")` to retrive passed variables from stdout, so the help text or error message must print to stderr. `Error::print` or `Error::exit` will print...

But I still need to print help(`ErrorKind::DisplayHelp`) to stderr. Is there a way to get the **colored** help string?

I solved the problem by adding `let g:indentLine_concealcursor = "nc"` into the .vimrc

In MSYS2 (git bash), directly run exe not works, but run with `npm run` or `cargo run` works.

relate to #648