---
name: "lein"
section: "1"
platform: "linux"
package: "leiningen"
version: "2.13.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/lein"
---

# lein(1)

Automate Clojure projects

## NAME

lein - Automate Clojure projects

## SYNOPSIS

**lein** \[**-o**\] \[**-U**\] \[*TASK* \[*ARGS*\]\]\
 **lein** \[**-h**\|**--help**\]\
 **lein** \[**-v**\|**--version**\]

## DESCRIPTION

Leiningen is for automating Clojure projects without setting your hair on fire.

Working on Clojure projects with tools designed for Java can be an exercise in frustration. With Leiningen, you just write Clojure.

## TASKS

**lein help** will show the complete list of tasks, while **lein help TASK** shows usage for a specific one.

**lein help tutorial** has a detailed walk-through of the various tasks, but the most commonly-used are:

- **lein new NAME**

  generate a new project skeleton

- **lein test \[TESTS\]**

  run the tests in the TESTS namespaces, or all tests

- **lein repl**

  launch an interactive REPL session in a networked REPL server

- **lein uberjar**

  package up the project and its dependencies as a standalone .jar file

- **lein install**

  install a project into your local repository

- **lein deploy \[REPOSITORY\]**

  deploy a library to a remote repository

- Other tasks available include:

  - **lein change**

    Rewrite project.clj by applying a function.

  - **lein check**

    Check syntax and warn on reflection.

  - **lein classpath**

    Print the classpath of the current project.

  - **lein clean**

    Remove all files from project's target-path.

  - **lein compile**

    Compile Clojure source into .class files.

  - **lein deps**

    Download all dependencies.

  - **lein do \[TASK\], ...**

    Higher-order task to perform other tasks in succession.

  - **lein jar**

    Package up all the project's files into a jar file.

  - **lein javac**

    Compile Java source files.

  - **lein pom**

    Write a pom.xml file to disk for Maven interoperability.

  - **lein release**

    Perform :release-tasks.

  - **lein retest**

    Run only the test namespaces which failed last time around.

  - **lein run**

    Run a -main function with optional command-line arguments.

  - **lein search**

    Search remote maven repositories for matching jars.

  - **lein show-profiles**

    List all available profiles or display one if given an argument.

  - **lein trampoline \[TASK\]**

    Run a task without nesting the project's JVM inside Leiningen's.

  - **lein update-in**

    Perform arbitrary transformations on your project map.

  - **lein vcs**

    Interact with the version control system.

  - **lein version**

    Print version for Leiningen and the current JVM.

  - **lein with-profile \[PROFILE\] \[TASK\]**

    Apply the given task with the profile(s) specified.

## OPTIONS

- **-o**

  Run a task offline.

- **-U**

  Run a task after forcing update of snapshots.

- **-h**, **--help**

  Print this help or help for a specific task.

- **-v**, **--version**

  Print Leiningen's version.

## CONFIGURATION

Leiningen reads its configuration from the **project.clj** file in your project root. Either use **lein new** to create a fresh project from which to work, or see the exhaustive list of configuration options with **lein help sample**.

You can customize your project map further with profiles; see **lein help profiles**.

## BUGS

Check https://codeberg.org/leiningen/leiningen/issues to see if your problem is a known issue. If not, please open a new issue on that site. Please include the output of **lein version** as well as your **project.clj** file and as much of the relevant code from your project as possible.

## COPYING

Copyright (C) 2009-2017 Phil Hagelberg and contributors.

Distributed under the Eclipse Public License, the same as Clojure uses. See the file /usr/share/doc/leiningen/copyright.

## AUTHOR

This manpage is written by Phil Hagelberg \<technomancy@gmail.com\>