From: Sean O'Halpin <sean.ohalpin@...>
Date: 2012-08-28T06:52:57+09:00
Subject: Re: Parsing unix filenames from STDIN

On Mon, Aug 27, 2012 at 10:51 AM, Robert Klemme
<shortcutter@googlemail.com> wrote:
>
> Two additional cents:
>
> 1. I'd rather use $stdin instead of STDIN, see here for reasoning:
> http://stackoverflow.com/questions/4279604/what-is-the-difference-between-stdin-and-stdin-in-ruby

Good point. I agree.

>
> 2. One can as well use the usual iteration for reading lines from files.
>
> =>
>
> require 'shellwords'
>
> $stdin.each_line do |line|
>   filename = Shellwords.shellwords(line).join('')
>   p filename
>   # expand wildcards
>   p Dir[filename]
> end
>
> Advantage is also that the scope of "line" is limited to the block
> reducing potential for errors.

Another good point.

> Btw, Sean, are you sure David will join all the shellwords?

No, I wrote my response after quickly reading his examples, not
by reading carefully to the end of his post.

> I am
> asking since he said there were commands as well and he basically
> wants to parse in the same way the shell does.  So:
>
> irb(main):006:0> ['my\\ file.txt', '"my file.txt"', 'ls foo\\
> bar.txt'].each {|s| printf "%p -> %p\n", s, Shellwords.shellwords(s)}
> "my\\ file.txt" -> ["my file.txt"]
> "\"my file.txt\"" -> ["my file.txt"]
> "ls foo\\ bar.txt" -> ["ls", "foo bar.txt"]
> => ["my\\ file.txt", "\"my file.txt\"", "ls foo\\ bar.txt"]
>

Hat trick! I agree with all your points :)

>
> Kind regards
>
> robert
>
> --
> remember.guy do |as, often| as.you_can - without end

Indeed. All the best,
Sean