On 02/20/2016 07:18 PM, Philip Rhoades wrote:
OK, that all makes sense but there is a further issue - I was trying
to keep it simple - this whole line is inside a Ruby "system" command ie:
system( "ssh .. " )
I can't use the second option because I need to use double quotes so
that I can use Ruby variables inside the double quotes eg:
I think you're still missing some fundamental concepts about nesting
quotes. (I was also mistaken in suggesting that the wildcards needed
escaping when the internal double-quotes were escaped, though, so... We
all make mistakes.)
In Ruby double-quoted strings, you can get interpolation, and in single
quoted strings you don't. But if you nest single quotes inside a
double-quoted strings, Ruby still treats the entire string as double
quoted. It doesn't change the rules when it finds single quotes inside
the double-quoted string, because they're merely a part of the
double-quoted string. So your options are:
system("ssh localhost \"find /home/... -maxdepth 1 -type f \\\\( -name
\\\"*.mp3\\\" -o -name \\\"*.m4a\\\" -o -name \\\"*.flac\\\" \\\\)\" ")
or:
system("ssh localhost 'find /home/... -maxdepth 1 -type f \\( -name
\"*.mp3\" -o -name \"*.m4a\" -o -name \"*.flac\" \\)' ")
Using single quotes means significantly less escaping, and you can still
use interpolation in any part of that string, in Ruby.
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