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;;; init-grep.el --- configure grep -*- lexical-binding:t -*-
;;; Commentary:
;;; Code:
(defvar mpolden/rg-template "rg -nH --no-heading <C> -e <R> -- "
"The grep template to use when rg (ripgrep) is installed.")
(defun mpolden/grep ()
"Run grep interactively in `default-directory' or current VC tree."
(interactive)
(let ((vc-root-dir (vc-root-dir)))
(if vc-root-dir
(vc-git-grep (grep-read-regexp) "" vc-root-dir)
(lgrep (grep-read-regexp) "" default-directory))))
(defun mpolden/grep-visit-buffer-other-window (&optional result noselect)
"Visit grep RESULT in another window.
If NOSELECT is non-nil, do not select the window."
(interactive)
(let ((current-window (selected-window)))
(compile-goto-error result)
(when noselect
(select-window current-window))))
(defun mpolden/grep-visit-buffer-other-window-noselect (&optional result)
"Visit grep RESULT another window, but don't select it."
(interactive)
(mpolden/grep-visit-buffer-other-window result t))
(use-package grep
:commands grep-read-regexp
:config
(when (executable-find "rg")
;; auto-detection of -H may fail when using rg so explicitly never use null
;; device
(setq grep-use-null-device nil)
(grep-apply-setting 'grep-template mpolden/rg-template))
:bind (;; C-c g runs git grep in current vc tree
("C-c g" . mpolden/grep)
:map grep-mode-map
;; make C-o and o behave as in dired
("o" . mpolden/grep-visit-buffer-other-window)
("C-o" . mpolden/grep-visit-buffer-other-window-noselect)
;; n and p changes line as in ag-mode
("n" . compilation-next-error)
("p" . compilation-previous-error)))
(use-package vc-git
:commands vc-git-grep
:init
(when (executable-find "rg")
(setq vc-git-grep-template mpolden/rg-template)))
(provide 'init-grep)
;;; init-grep.el ends here
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