Action to clear selections if there are any else exit fzf. (Feature request)

[smashgen]

Checklist

• I have read through the manual page (man fzf)
• I have searched through the existing issues
• For bug reports, I have checked if the bug is reproducible in the latest version of fzf

Output of fzf --version

0.50 (devel)

OS

• Linux
• macOS
• Windows
• Etc.

Shell

• bash
• zsh
• fish

Problem / Steps to reproduce

I checked the man page and I don't think there is an action that already does this. I think it would be useful to have an action that clears selections if there are any else exit fzf, similar to the cancel action.

[LangLangBart]

The transform¹ action enables the user to execute an action conditionally.

---

Example

The fzf tool sets the environment variable FZF_SELECT_COUNT². If no selections are present, the operation is aborted. Otherwise, it deselects the matches upon pressing ⌃ Control + A.

look foo | fzf --multi \
  --bind 'load:select-all' \
  --bind 'ctrl-a:transform:((FZF_SELECT_COUNT)) &&
    echo "deselect-all" ||
    echo "abort"'

Footnotes

1. changelog 0.45.0 ↩

2. changelog 0.46.0 ↩