frodera/ripgrep-in-emacs.md

## ripgrep-in-emacs.md

      
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              ripgrep-in-emacs.md
            
          
    Why

Ripgrep is a fast search tool like grep. It's mostly a drop-in replacement for ag, also know as the Silver Searcher.
helm-ag is a fantastic package for Emacs that allows you to display search results in a buffer.
You can also jump to locations of matches. Despite the name, helm-ag works with ripgrep (rg) as well
as with ag.
How


Install ripgrep


Make Spacemacs use helm-project-do-ag directly when pressing SPC / without preselecting the symbol under the cursor.
Type SPC f e d to bring up ~/.spacemacs.
(defun dotspacemacs/user-config ()
  ;; ....
  (evil-leader/set-key "/" 'spacemacs/helm-project-do-ag))


Force ripgrep as search tool
Add the following to .emacs-custom or wherever you keep emacs custom set variables.
(custom-set-variables
  ;; ...
  '(helm-ag-base-command "rg --vimgrep --no-heading --smart-case"))


Usage

SPC / should allow you to search in the current project.
You can prefix patterns with options
-G*.cljs -w time - search for the word "time" in all .cljs files
-tclojure time - search for "time" in all .{clj,cljs,cljc} files
uno\ due\ tre - search for the string "uno duo tre"
-C5 foo - search for "foo" but show 5 lines of context before and after the match
(?:^|[^\w-])time(?:[^\w-]|$) - search for lisp-word "time", i.e. search for the full word "time"
while considering "-" to be a word characer