This package integrates ack with Emacs. The resulting *ack* buffer is just like vanilla *grep* but results come from your tool of choice.

Not only ack, but Ack-like tools such as the silver searcher (ag), ripgrep (rg) are well supported, as are git grep and hg grep.

The program guesses good defaults -- including searching for the thing at point -- but lets you input C-u to customize the directory, commands, switches etc...

Ack is part of GNU ELPA - the official package archive for Emacs:

M-x package-install RET ack RET

Just M-x ack or do something like (global-set-key (kbd "C-c C-g") 'ack).

• ack

• git grep

• Type M-x ack and provide a pattern to search.
• Type C-u M-x ack to search from current project root.
• Type C-u C-u M-x ack to interactively choose a directory to search.

While reading ack command and args from the minibuffer, the following key bindings may be useful:

• M-I => insert a template for case-insensitive file name search
• M-G => insert a template for git grep, hg grep or bzr grep
• M-Y => grab the symbol at point from the window before entering the minibuffer
• TAB => completion for ack options

If you use the above keybindings very often, stick the corresponding command names in ack-minibuffer-setup-hook. The following snippet makes M-x ack insert a git|hg|bzr grep template if searching from a project root. Then it will try to insert the symbol at point.

(add-hook 'ack-minibuffer-setup-hook 'ack-skel-vc-grep t)
(add-hook 'ack-minibuffer-setup-hook 'ack-yank-symbol-at-point t)

Check out the emacs23 branch.

https://github.com/leoliu/ack-el/issues

Phillip Lord. The original author and previous mantainer is Leo Liu.