bash 如何将引用的参数传递给 GNU Parallel
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How to pass quoted args to GNU Parallel
提问by chaimp
I need to pass some text that includes whitespace and other characters to a script that's being run by GNU Parallel.
我需要将一些包含空格和其他字符的文本传递给由 GNU Parallel 运行的脚本。
Here is a very simple example:
这是一个非常简单的例子：
$ seq 1 3 | parallel echo "Quoted ' (text)"
The above example will output this:
上面的例子将输出：
sh: -c: line 0: unexpected EOF while looking for matching `''
sh: -c: line 1: syntax error: unexpected end of file
sh: -c: line 0: unexpected EOF while looking for matching `''
sh: -c: line 1: syntax error: unexpected end of file
sh: -c: line 0: unexpected EOF while looking for matching `''
sh: -c: line 1: syntax error: unexpected end of file
However, if I do this everything works:
但是，如果我这样做，一切正常：
seq 1 3 | parallel echo "\"Quoted ' (text)\""
I happen to be running this from a python script, so before passing the arguments I'm double quoting them in the script like this:
我碰巧从 python 脚本运行它，所以在传递参数之前，我在脚本中双引号它们是这样的：
args = ["Some arg", "Another arg", "etc."]
args = ' '.join(pipes.quote(pipes.quote(arg)) for arg in args)
But it doesn't seem like a clean solution.
但这似乎不是一个干净的解决方案。
Does anybody know of a better way to pass arguments to GNU Parallel?
有人知道将参数传递给 GNU Parallel 的更好方法吗？
Thanks!
谢谢！
回答by Dimitre Radoulov
zsh-4.3.12[sysadmin]% print -l {1..3} |
parallel -q echo "Quoted ' (text)"
Quoted ' (text) 1
Quoted ' (text) 2
Quoted ' (text) 3
As described by @mortehu:
正如@mortehu 所描述的：
Arguments passed to commands through parallel are expanded by the shell twice: once in the invocation of parallel, and once when parallel runs your command.
-qprevents the second shell expansion.
通过 parallel 传递给命令的参数被 shell 扩展两次：一次是在调用 parallel 时，一次是在 parallel 运行您的命令时。
-q防止二次壳膨胀。
回答by Ole Tange
There is a whole section in the man page dedicated to quoting:
手册页中有一个完整的部分专门用于引用：
http://www.gnu.org/s/parallel/man.html#QUOTING
http://www.gnu.org/s/parallel/man.html#QUOTING
It even mentions the very error messages you write in your question.
它甚至提到了您在问题中写的错误消息。
If you can write it better please email your version to: [email protected].
如果您能写得更好，请将您的版本通过电子邮件发送至：[email protected]。
