Cannot quit fzf early with --exit-0 or --select-1

[lincheney]

• Category
  • fzf binary
  • fzf-tmux script
  • Key bindings
  • Completion
  • Vim
  • Neovim
  • Etc.
• OS
  • Linux
  • Mac OS X
  • Windows
  • Windows Subsystem for Linux
  • Etc.
• Shell
  • bash
  • zsh
  • fish

Running the following (in bash or zsh) and pressing escape or enter immediately causes fzf to quit with the appropriate exit code.

fzf < <(sleep 10; echo 123; sleep 10; echo 456)

Running with the --exit-0 or --select-1 flag, however, pressing escape/enter has no effect until the sleep 10 has finished.

fzf --exit-0 < <(sleep 10; echo 123; sleep 10; echo 456) # stall for 10s
fzf --select-1 < <(sleep 10; echo 123; sleep 10; echo 456) # stall for 20s

(Note this is different from (sleep 10; echo 123) | fzf which is the shell stalling, not fzf.)

[junegunn]

Well, they are designed to work that way. The purpose of the options is not to start the interactive finder when it's not needed, not to cause unnecessary flickering of the screen while running your script. See #27 and #36 for the background.