Re: Emacs can't capture fzf output in Windows 10

[Eli Zaretskii <eliz@gnu.org>]

> From: "Shuguang Sun" <shuguang79@qq.com>
> Date: Mon, 2 Mar 2020 12:25:48 +0800
> 
> I'm trying to use fzf (junegunn/fzf) in windows, however it seems emacs can't capture the output of fzf.
> 
> 
> Example:&nbsp; fzf with -filter will be in filter mode and do not start interactive finder. 
> 
> - In shell (cmd): "fzf.exe --filter=tmp" will not exit
> - In shell (cmd): "fzf.exe --filter=tmp &gt; aa.txt"&nbsp; will not exit
> 
> - (call-process "cmd.exe" nil t nil "/C" "start" "fzf" "--filter=tmp") will give a flash window (with list of findings) and print 0 in emacs.
> 
> - (shell-command "fzf --filter=tmp") will lead to a message (Shell command failed with code 1 and no output)
> - (shell-command-to-string "fzf --filter=tmp") give a empty string
> 
> 
> However if I run "fzf --filter=tmp" in the CMD box it will provide a list of finding, and "fzf --filter=tmp &gt; aa.txt" will print the findings to file aa.txt.
> 
> 
> It can't run fzf in interactive mode as I understand there is no true term for emacs in windows but why it can't be run in filter mode?

It looks like fzf uses direct screen I/O?  If so, this won't work on
Windows when stdout is a pipe, which is what happens when Emacs on
Windows runs a subprocess.

I suggest to open an issue with fzf, and ask there whether it can run
with pipes as stdin/stdout.