A tool for formatting Clojure code
cljstyleis a tool for formatting Clojure code. It can take something messy like this:
( ns foo.bar.baz "some doc" (:require (foo.bar [abc :as abc] def)) (:use foo.bar.qux) (:import foo.bar.qux.Foo ;; Need this for the thing foo.bar.qux.Bar) )
(defn hello "says hi" (  (hello "world") ) ([name] ( println "Hello," name ) ))
...and restyle it into nicely-formatted code like this:
(ns foo.bar.baz "some doc" (:require [foo.bar.abc :as abc] [foo.bar.def] [foo.bar.qux :refer :all]) (:import (foo.bar.qux ;; Need this for the thing Bar Foo)))
(defn hello "says hi" ( (hello "world")) ([name] (println "Hello," name)))
Note that this is a rewrite of the original weavejester/cljfmt tool to provide more capabilities and configurability as well as a native-compiled binary.
Binary releases are available on the GitHub project. The native binaries are self-contained, so to install them simply place them on your path.
Releases are also published to Clojars. To use the latest version, add the following dependency to your project:
cljstylecan be installed on macOS via a Homebrew Cask:
brew cask install cljstyle
cljstyletool supports several different commands for checking source files.
To check the formatting of your source files, use:
If the formatting of any source file is incorrect, a diff will be supplied showing the problem, and what cljstyle thinks it should be.
If you want to check only a specific file, or several specific files, you can do that, too:
cljstyle check src/foo/core.clj
Once you've identified formatting issues, you can choose to ignore them, fix them manually, or let cljstyle fix them with:
As with the
checktask, you can choose to fix a specific file:
cljstyle fix src/foo/core.clj
pipecommand offers a generic way to correct style by reading Clojure code from stdin and writing the reformatted code to stdout:
cljstyle pipe < in.clj > out.clj
This command resolves configuration from the directory it is executed in, since there is no explicit file path to use.
For inspecting what cljstyle is doing, one tool is to specify the
--verboseflag, which will cause additional debugging output to be printed. There are also a few extra commands which can help understand what's happening.
findcommand will print what files would be checked by cljstyle. It will print each file path to standard output on a new line:
cljstyle find [path...]
configcommand will show what configuration settings cljstyle would use to process the specified files or files in the current directory:
cljstyle config [path]
versionwill show what version of the tool you're using:
cljstylecan be integrated into many different tools, including shells, editors, and tests. See the integration docs for more details.
cljstyletool comes with a sensible set of default configuration built-in and may additionally be configured by using a hierarchy of
.cljstylefiles in the source tree. The configuration settings include toggles for format rules, width constraints, and the indentation rules.
By default, cljstyle will ignore forms which are wrapped in a
(comment ...)form or preceeded by the discard macro
#_. You can also optionally disable formatting rules from matching a form by tagging it with
^:cljstyle/ignoremetadata - this is often useful for macros.
Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version.