tcsh中的多行变量 [英] multi-line variable in tcsh

问题描述

我想在tcsh中有一个变量来保存脚本的使用情况信息，因此在我的脚本中，每当我编写echo $ usage时，它将打印

I want to have variable in tcsh to hold the usage info of my script, so in my script, whenever I write echo $usage, it will print

my_script
  -h : -help
  -b : do boo

etc`。

有没有办法做到这一点？可以使用<< EOF？

Is there a way to do this? Can this be done using the << EOF ?

我尝试过类似的操作，但失败了：

I've tried something like this, but it failed:

set help =  << EOF
     my_script 
       -h : print help
       -b : do boo
EOF

谢谢

推荐答案

set help = 'my_script\
  -h : -help\
  -b : do boo'

echo $help:q

另一种方法：

alias help 'echo "my_script" ; echo "  -h : -help" ; echo "  -b : do boo"'

help

但也请参见： http://www.faqs.org/faqs/unix-faq / shell / csh-whynot /

我使用csh和tcsh的时间超过了我想承认的时间，但是我不得不求助于试用错误找出第一个解决方案。例如， echo $ help 无效；我不知道为什么，而且我怀疑是否可以从文档中弄清楚。

I've been using csh and tcsh for more years than I care to admit, but I had to resort to trial and error to figure out the first solution. For example, echo "$help" doesn't work; I don't know why, and I doubt that I could figure it out from the documentation.

（在Bourne shell中，您可以这样执行：

(In Bourne shell, you could do it like this:

help() {
    cat <<EOF
my_script
  -h : -help
  -b : do boo
EOF
}

help

，但是csh和tcsh没有功能。）

but csh and tcsh don't have functions.)

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