谁能为我解释一下clojure中的sh以便执行系统命令? [英] Can anyone explain me about the sh in clojure in order to execute the system command?

问题描述

我正在使用Mac OS.我想使用(使用'[clojure.java.shell:only [sh]])执行系统命令，就像在 https://clojuredocs.org/clojure.java.shell/sh 但无法理解诸如可以通过一种语法传递多少个参数之类的东西.

I'm using Mac OS. I want to execute a system command using (use '[clojure.java.shell :only [sh]]), like in How to execute system commands?. I have read https://clojuredocs.org/clojure.java.shell/sh but wasn't able to understand things like how many parameters can be passed in one syntax, etc.

在Windows中，我尝试了(sh"cmd""//C""dir")，但该命令仍然有效，但在Mac OS中，如何执行上述语法?此外，我想传递的参数不仅限于 dir .例如，我要执行(sh"cmd""/c""mged""test.g").注意: mged 和 test.g 是从 Brl-Cad 引用的.

In windows I have tried (sh "cmd" "/C" "dir")and it was working but in Mac OS, how do I execute the above syntax? Moreover I want to pass more parameters than just dir. For example, I want to execute (sh "cmd" "/c" "mged" "test.g"). NOTE: mged and test.g are referred from Brl-Cad.

我想使用上面的示例绘制一个球体.

I want to draw a sphere using above example.

推荐答案

clojure.java.shell 仅使用给定参数(以及:env 和:dir 和...-参见文档).因此，首先最有可能在OSX/Unix上没有 cmd ，但是通常会有一个外壳.与外壳上的 cmd/c 相同的是 -c . -c 接受一个参数，您可以在此处编写"shell代码"-这意味着您可以使用管道，重定向，env-vars ...-因此，如果您只想执行带有参数的工具，请使用:

clojure.java.shell just spawns the process with the given arguments (and :env and :dir and ... - see the doc). So first of all there is most likely no cmd on OSX/Unix, but there usually is a shell. And the "same" as cmd /c on the shell is -c. -c takes one argument and you can write your "shell code" there - that means you can use pipes, redirects, env-vars, ... - so if you just want to execute a tool with a param, use:

(sh "mged" "test".g")

如果要使用外壳功能"，请使用:

If you want "shell features" use:

(sh "/bin/sh" "-c" "echo ${TERM} | tr x u")

(请注意，"shell代码"只是一个参数)

(note that the "shell code" is just one argument)

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