Leiningen 安装<转>

Leiningen是一个Clojure项目管理工具。

安装过程如下：

1. 下载lein脚本

https://raw.github.com/technomancy/leiningen/preview/bin/lein

2. 复制到/usr/bin目录下，并允许执行

 mv lein /usr/bin/
 root@chenshu-yangzhou-home:~/Downloads# chmod +x /usr/bin/lein

3. 运行lein命令，不要使用root权限

  lein
 Downloading Leiningen now...
 --2012-12-25 17:20:49--  https://github.com/downloads/technomancy/leiningen/leiningen-2.0.0-preview10-standalone.jar
 Resolving github.com (github.com)... 207.97.227.239
 Connecting to github.com (github.com)|207.97.227.239|:443... connected.
 HTTP request sent, awaiting response... 302 Found
 Location: http://cloud.github.com/downloads/technomancy/leiningen/leiningen-2.0.0-preview10-standalone.jar [following]
 --2012-12-25 17:20:50--  http://cloud.github.com/downloads/technomancy/leiningen/leiningen-2.0.0-preview10-standalone.jar
 Resolving cloud.github.com (cloud.github.com)... 216.137.55.10, 216.137.55.192, 216.137.55.57, ...
 Connecting to cloud.github.com (cloud.github.com)|216.137.55.10|:80... connected.
 HTTP request sent, awaiting response... 200 OK
 Length: 11129174 (11M) [application/x-java-archive]
 Saving to: `/home/chenshu/.lein/self-installs/leiningen-2.0.0-preview10-standalone.jar.pending'

 100%[======================================>] 11,129,174   459K/s   in 23s

 2012-12-25 17:21:14 (470 KB/s) - `/home/chenshu/.lein/self-installs/leiningen-2.0.0-preview10-standalone.jar.pending' saved [11129174/11129174]

 Leiningen is a tool for working with Clojure projects.

 Several tasks are available:
 check               Check syntax and warn on reflection.
 classpath           Write the classpath of the current project to output-file.
 clean               Remove all files from project's target-path.
 compile             Compile Clojure source into .class files.
 deploy              Build jar and deploy to remote repository.
 deps                Show details about dependencies.
 do                  Higher-order task to perform other tasks in succession.
 help                Display a list of tasks or help for a given task.
 install             Install current project to the local repository.
 jar                 Package up all the project's files into a jar file.
 javac               Compile Java source files.
 new                 Generate project scaffolding based on a template.
 plugin              DEPRECATED. Please use the :user profile instead.
 pom                 Write a pom.xml file to disk for Maven interoperability.
 repl                Start a repl session either with the current project or standalone.
 retest              Run only the test namespaces which failed last time around.
 run                 Run the project's -main function.
 search              Search remote maven repositories for matching jars.
 show-profiles       List all available profiles or display one if given an argument.
 test                Run the project's tests.
 trampoline          Run a task without nesting the project's JVM inside Leiningen's.
 uberjar             Package up the project files and all dependencies into a jar file.
 upgrade             Upgrade Leiningen to specified version or latest stable.
 version             Print version for Leiningen and the current JVM.
 with-profile        Apply the given task with the profile(s) specified.

 Run lein help $TASK for details.

 See also: readme, faq, tutorial, news, sample, profiles,
 deploying and copying.

注意国内可能需要使用proxy才能下载，参考我的关于终端如何设置http代理的方式。

http://blog.csdn.net/sheismylife/article/details/8331287

如果因为网络原因安装失败，删除掉~/.lein目录后重新执行lein命令即可。

现在可以启动一个REPL会话，上一片里面用的是java -cp 命令，这里更简单：

 $ lein repl
 nREPL server started on port 55538
 REPL-y 0.1.0-beta10
 Clojure 1.4.0
     Exit: Control+D or (exit) or (quit)
 Commands: (user/help)
     Docs: (doc function-name-here)
           (find-doc "part-of-name-here")
   Source: (source function-name-here)
           (user/sourcery function-name-here)
  Javadoc: (javadoc java-object-or-class-here)
 Examples from clojuredocs.org: [clojuredocs or cdoc]
           (user/clojuredocs name-here)
           (user/clojuredocs "ns-here" "name-here")
 user=>

输入一个lisp表达式看看：

 user=> (+ 1 2)
 3

能够运行。注意=>左边的user代表当前的namespace.