Version 2.4.2 of package Shell-Command+ has just been released in GNU ELPA.
You can now find it in M-x list-packages RET.

Shell-Command+ describes itself as:

  =========================
  An extended shell-command
  =========================

More at https://elpa.gnu.org/packages/shell-command+.html

## Summary:

  `shell-command+' is a `shell-command' substitute, that extends the
  regular Emacs command with several features.  After installed,
  configure the package as follows:

	  (global-set-key (kbd "M-!") #'shell-command+)

  A few examples of what `shell-command+' can do:

  * Count all lines in a buffer, and display the result in the
    minibuffer:

    > wc -l

  * Replace the current region (or buffer in no region is selected)
    with a directory listing of the parent directory.

    .. < ls -l

  * Delete all instances of the charachters a, b, c, ..., z, in the
    selected region (or buffer, if no region was selected).

    | tr -d a-z

  * Open a man-page using Emacs default man page viewer.
    `shell-command+' can be extended to use custom Elisp handlers via
    as specified in `shell-command+-substitute-alist'.

## Recent NEWS:

Version 2.4.0 (???)

- Allow adding or removing features using
  `shell-command+-features'.
- Add `shell-command+-default-region' user option.
- Remove `shell-command+-use-eshell'.
- Deprecate `shell-command+-enable-file-substitution'.
- Minor bug fixes and stability improvements.

Thanks to Visuwesh for many productive discussions on the mailing
list:

- https://lists.sr.ht/~pkal/public-inbox/%3C87czduxwt4.fsf%40gmail.com%3E
- https://lists.sr.ht/~pkal/public-inbox/%3C878roixwds.fsf%40gmail.com%3E
- https://lists.sr.ht/~pkal/public-inbox/%3C87edxmakqq.fsf%40gmail.com%3E