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Grape is a syntax-aware grep-like utility for Clojure code. It allows one to search for code patterns using Clojure structures.


This is experimental for now.

java -jar grape.jar [-r|--recursive] <pattern> <file> [<file> ...]

If you have Homebrew, you can install it like so:

brew install bfontaine/utils/grape


;; Lein/Boot
[bfontaine/grape "0.2.0"]

;; Deps
bfontaine/grape {:mvn/version "0.2.0"}
(require '[grape.core :as g])

(def my-code (slurp "myfile.clj"))

;; Find all occurrences of map called with three arguments
(g/find-codes my-code (g/pattern "(map $ $ $)"))

;; Find all occurrences of (condp = ...)
(g/find-codes my-code (g/pattern "(condp = $&)"))

;; Find all occurrences of `if` with no `else` clause
(g/find-codes my-code (g/pattern "(if $ $)"))
; => ({:match "(if …)", :meta {…}}, …)

Matches are map with a :match key that contains a string with the matching code and a :meta key with line/column metadata which you can use to locate the code in your file.


A pattern is any valid Clojure expression. It can contain some special symbols that are interpreted as wildcards.

Comments, whitespaces, and discard reader macros (#_) are ignored when matching.


  • $: any expression.
  • $&: any number of expressions, including zero. (f $&) matches (f), (f 1), (f 1 2), etc.
  • $string, $list, etc: any expression of the given type. These mirror Parcera’s grammar.

See the full patterns documentation.

Wildcards can be combined: #{$ $&} matches a set with at least one element.


Copyright © 2019 Baptiste Fontaine

This program and the accompanying materials are made available under the terms of the Eclipse Public License 2.0 which is available at

This Source Code may also be made available under the following Secondary Licenses when the conditions for such availability set forth in the Eclipse Public License, v. 2.0 are satisfied: GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version, with the GNU Classpath Exception which is available at

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