如何从clojure代码构建可执行的jar？与java的一个主要功能在一个程序 [英] how to build executable jar from clojure code? with a main function of java in one program

问题描述

如何从clojure代码构建可执行jar？

How can I build an executable jar from clojure code?

我想让它有一个main函数，以便运行程序。

I want it to have a main function, so that java -jar jarfile.jar runs the program.

推荐答案

正如Erhan Bagdemir回答，你应该使用Leiningen。以下是我在Windows上的操作方式：

As Erhan Bagdemir answered, you should use Leiningen. Here's how I do it on Windows:

您将要下载Leiningen脚本，并把它放在你的 PATH 。如果您的路径上有一个已用于可执行脚本的文件夹，请执行以下操作：

You're going to download the Leiningen script and put it somewhere on your PATH. If you have a folder already on your path that you use for executable scripts, if not, do the following:

1. 下载来自Github的Leiningen软件包。


2. 解压缩您的主文件夹（例如 / Users / vikbehal ）


3. 将解压缩创建的文件夹添加到 PATH 。为此，打开控制面板，然后转到系统区域，您可以在其中编辑环境变量。通过添加 / Users / vikbehal / lein （或任何文件夹名称）来编辑系统或用户的 PATH ）到 PATH ，确保通过分号（; ）将该条目与其他条目分隔开。


4. 按 Ok 可保存更改。

1. Download the Leiningen package from Github.
2. Unzip it in your home folder (e.g. /Users/vikbehal)
3. Add the folder that was created by unzipping to your PATH. To do this, open the Control Panel, and go to the System area where you can edit your Environment Variables. Edit either the system or your user's PATH value by adding /Users/vikbehal/lein (or whatever the folder is called) to your PATH, making sure to keep that entry separated from others by a semicolon (;).
4. Press Ok to save your changes.

您可以通过打开命令提示符并运行 lein help 来验证您是否已成功安装Leiningen。你应该看到Leiningen安装一些初始文件。如果您遇到错误，请确保您已正确添加Leiningen所在的文件夹到 PATH 。

You can verify that you've successfully installed Leiningen by opening up a command prompt and running lein help. You should see Leiningen installing some initial files. If you get an error, make sure you've properly added the folder where Leiningen lives to your PATH.

Leiningen为您提供了一个良好的默认目录结构，处理依赖关系管理，并确保在运行REPL时正确设置Java的类路径，或者在这种情况下，

Leiningen gives you a good default directory structure, handles dependency management, and ensures that Java's classpath is set properly when running a REPL or, in this case, jarring your application.

以下是Leiningen标准命令的失败：

Here's a run-down of Leiningen standard commands:

# Start a blank project
lein new my-project

# Pull down dependencies defined in your project.clj file
lein deps

# Create a "library" jar of your project
lein jar

# Create an executable jar of your project
lein uberjar

看起来最后一个命令是你想要的，对吗？首先，您需要配置一些东西，以便Leiningen可以正确地构建可执行文件。

It looks like that last command is what you want, right? First, you need to configure a few things, so that Leiningen can build your executable jar properly.

您需要做三件事，使 lein uberjar 正常工作：

You need to do three things to make lein uberjar work properly:

1. 编写一个 -main 函数，作为执行jar文件的入口点。 （注意 - ，表示此函数更像是一个Java方法，而不是常规的Clojure函数。）


2. 请确保在 ns 命名空间声明中添加（：gen-class：main true）声明


3. 添加：main my.main.namespace project.clj

1. Write a -main function that will act as the "entry point" to the execution of your jar file. (Note the -, it denotes that this function is more like a "Java method" than a regular Clojure function.)
2. Make sure you add a (:gen-class :main true) declaration in the ns namespace declaration at the top of the file that contains your -main function.
3. Add a :main my.main.namespace entry in your project.clj

现在运行 lein uberjar 。在开发时，你可以使用 lein run ，如果你想测试你的应用程序如何作为一个可执行的jar，但不想显式重新jar每次你进行更改。

Now run lein uberjar. While developing, you can alternatively use lein run if you want to test how your application would behave as an executable jar, but don't want to explicitly re-jar every time you make a change.

这篇关于如何从clojure代码构建可执行的jar？与java的一个主要功能在一个程序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！