[Feature Request] Customizable shell command flag for command execution about fzf HOT 2 CLOSED

Sure, using --with-shell is much clearer and simpler to write than using two environment variables.

It's important to mention in the documentation that, if this feature is implemented, one should not set
the flags to -ic for the typical SHELL (zsh, …), as it usually ends badly. Below are some instances where
doing so has caused issues:

• Ctrl-r for shell history but also bulk select and remove from history · Discussion #3629 · junegunn/fzf
• View mode crash with bat %c %q and shellcmdflag=-ic · Issue #471 · vifm/vifm
  • Recommend against setting 'shellcmdflag' to "-ic" · vifm/vifm@809b84a

from fzf.

The suggestion here is to add an option similar to shellcmdflag of Vim: https://vimdoc.sourceforge.net/htmldoc/options.html#'shellcmdflag'

Personally, I don't like having to set two environment variables (or options) to make it work. It doesn't feel much more ergonomic than writing a wrapper script. I'd prefer to add an option that looks like fzf --with-shell "$SHELL -c" as commented in the previous pull request though it has it's own issue.

from fzf.