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Full Discussion: Using variable in sed
Operating Systems OS X (Apple) Using variable in sed Post 302771527 by bakunin on Thursday 21st of February 2013 01:07:27 AM
Old 02-21-2013
Quote:
Originally Posted by mattiasvdm
I thought something like this:
Code:
command=somecommand3

sed -ie '/#End/i\
"$command"\
' /location/of/somescript.sh

But this just adds "$command".
The reason is that inside a single-quoted string double-quoting has no effect. From the POV of the shell, though, you are inside a single-quoted string. This should work:

Code:
sed -ie '/#End/i\
'"$command"'\
' /location/of/somescript.sh

Note that the single-quoted string ends, then a double-quoted string starts and when this ends another single-quoted string starts. This may look cumbersome, but it is the only way to ensure the sed-command will not break if "$command" contains whitespace.

I hope this helps.

bakunin
 

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LEARN ABOUT MOJAVE

ppi::token::quote::double5.18

PPI::Token::Quote::Double(3)				User Contributed Perl Documentation			      PPI::Token::Quote::Double(3)

NAME

       PPI::Token::Quote::Double - A standard "double quote" token

INHERITANCE

	 PPI::Token::Quote::Double
	 isa PPI::Token::Quote
	     isa PPI::Token
		 isa PPI::Element

DESCRIPTION

       A "PPI::Token::Quote::Double" object represents a double-quoted interpolating string.

       The string is treated as a single entity, PPI will not try to understand what is in the string during the parsing process.

METHODS

       There are several methods available for "PPI::Token::Quote::Double", beyond those provided by the parent PPI::Token::Quote, PPI::Token and
       PPI::Element classes.

       Got any ideas for methods? Submit a report to rt.cpan.org!

   interpolations
       The interpolations method checks to see if the double quote actually contains any interpolated variables.

       Returns true if the string contains interpolations, or false if not.

   simplify
       For various reasons, some people find themselves compelled to have their code in the simplest form possible.

       The "simply" method will turn a simple double-quoted string into the equivalent single-quoted string.

       If the double can be simplified, it will be modified in place and returned as a convenience, or returns false if the string cannot be
       simplified.

SUPPORT

       See the support section in the main module.

AUTHOR

       Adam Kennedy <adamk@cpan.org>

COPYRIGHT

       Copyright 2001 - 2011 Adam Kennedy.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

       The full text of the license can be found in the LICENSE file included with this module.

perl v5.18.2							    2011-02-25					      PPI::Token::Quote::Double(3)
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