Support multi-isearch-buffers or similar behavior

[kickingvegas]

Per input from @dandrake from https://mathstodon.xyz/@ddrake/112037755737321142, add multi-isearch-buffers like behavior to cc-isearch-menu.

[kickingvegas]

TIL about multi-isearch-buffers. It’s both neat and kinda awkward as it doesn’t integrate the current search. At the moment I think a custom function will need to be made to get what you’re looking for.

A couple of observations:

• By default, multi-isearch-buffers forces you to select which buffers to isearch through which can be onerous. You need to invoke a prefix (C-u) to allow for a regexp filter of the buffers to isearch through.
  • Open question whether requiring knowledge of Elisp regexp is too high a bar for casual users
  • You don’t get a choice of order of buffers to isearch through when using a regexp.
• Fine line between just using rgrep to get desired result.

That said, when I get the cycles I’ll try to explore if a solution that integrates the current search can be made. I’m open to a PR for this as well.

[kickingvegas]

@dandrake - As it turns out, this workflow in Casual Dired v1.1.0 might be what you're looking for:

1. Launch Casual Dired in a Dired buffer.
2. Mark some files.
3. From the Casual Dired main menu: (#) Utils > (s) Search & Replace > (C-s) I-search

You will now be able to search through multiple files.