How to pass command line string to uv.spawn？ about luv

[linrongbin16]

thanks for education, much clear for me

[squeek502]

Going from a string with quotes, etc to a list of arguments is typically handled by the shell, and each shell can do things differently (how to escape things, what needs to be escaped, etc), so there's no one correct way to do it AFAIK.

I believe what you'd want for those two commands would be:

{
  "git",
  "log",
  "--pretty=%C(yellow)%h %C(cyan)%cd %C(green)%aN%C(auto)%d %Creset%s",
  "--date=short",
}

and

{
  "rg",
  "--no-heading",
  "--column",
  "--",
  "fzf",
}

[linrongbin16]

Hi, thanks to confirm.

I have one more question, how does the quotes and escaping characters handled by uv.spawn?

In your sample code, there's no single quote ' around the %C(yellow)%h %C(cyan)%cd %C(green)%aN%C(auto)%d %Creset%s?

So inside uv.spawn, it will automatically add quotes for me?

[squeek502]

Quotes are only necessary when determining if something is a single argument or multiple arguments. Once the arguments have been split, then quotes are no longer necessary. This splitting (and therefore removal of quotes) is what the shell usually does for you.

For example, if you run something like:

myprogram "some argument"

then in myprogram you'd get some argument (without the quotes) as argv[1].

So, when calling uv.spawn, you just call it with the arguments already split, so there's no need for quotes.

There is a caveat for Windows, though, since it does actually transform it back into a single string before giving it to CreateProcess. See the options.verbatim flag if you need to do your own quoting for Windows:

options.verbatim - If true, do not wrap any arguments in quotes, or perform any other escaping, when converting the argument list into a command line string. This option is only meaningful on Windows systems. On Unix it is silently ignored.

You'll probably need to test it on Windows to make sure it does what you expect.

---

Oh also, the docs are wrong about options.args: the first value should not be the command/program name. Instead you'll want to do something like this:

uv.spawn("git", {
  args = {
    "log",
    "--pretty=%C(yellow)%h %C(cyan)%cd %C(green)%aN%C(auto)%d %Creset%s",
    "--date=short",
  },
})

will update the docs about that.