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Top Forums Shell Programming and Scripting Please explain this SED expression Post 302508213 by Perderabo on Saturday 26th of March 2011 05:07:37 PM
Old 03-26-2011
More like it removes the entry (except the first line) if any line contains "name"...

Code:
$ cat hosttest
stufff
name = name
more stuff
<VirtualHost>
qqqq
qqq2
qqqq3
name=qname
qqqqqq7
qqqqq9
</VirtualHost>
<VirtualHost>
zzzzzz
zzzzzz2
zzzz3
jjje=zzzz
</VirtualHost>
$ sed ':t /<VirtualHost/,/VirtualHost>/ { /VirtualHost>/!{ $!{ N; bt } }; /name/d; }' hosttest
stufff
name = name
more stuff
<VirtualHost>
<VirtualHost>
zzzzzz
zzzzzz2
zzzz3
jjje=zzzz
</VirtualHost>
 $

 

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GIT-STRIPSPACE(1)						    Git Manual							 GIT-STRIPSPACE(1)

NAME
git-stripspace - Remove unnecessary whitespace SYNOPSIS
git stripspace [-s | --strip-comments] < input DESCRIPTION
Clean the input in the manner used by Git for text such as commit messages, notes, tags and branch descriptions. With no arguments, this will: o remove trailing whitespace from all lines o collapse multiple consecutive empty lines into one empty line o remove empty lines from the beginning and end of the input o add a missing to the last line if necessary. In the case where the input consists entirely of whitespace characters, no output will be produced. NOTE: This is intended for cleaning metadata, prefer the --whitespace=fix mode of git-apply(1) for correcting whitespace of patches or files in the repository. OPTIONS
-s, --strip-comments Skip and remove all lines starting with comment character (default #). -c, --comment-lines Prepend comment character and blank to each line. Lines will automatically be terminated with a newline. On empty lines, only the comment character will be prepended. EXAMPLES
Given the following noisy input with $ indicating the end of a line: |A brief introduction $ | $ |$ |A new paragraph$ |# with a commented-out line $ |explaining lots of stuff.$ |$ |# An old paragraph, also commented-out. $ | $ |The end.$ | $ Use git stripspace with no arguments to obtain: |A brief introduction$ |$ |A new paragraph$ |# with a commented-out line$ |explaining lots of stuff.$ |$ |# An old paragraph, also commented-out.$ |$ |The end.$ Use git stripspace --strip-comments to obtain: |A brief introduction$ |$ |A new paragraph$ |explaining lots of stuff.$ |$ |The end.$ GIT
Part of the git(1) suite Git 1.8.3.1 06/10/2014 GIT-STRIPSPACE(1)
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