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Top Forums Shell Programming and Scripting Remove white space at the beginning of lines Post 302231545 by ShawnMilo on Tuesday 2nd of September 2008 02:52:44 PM
Old 09-02-2008
You could pipe it through a Perl one-liner pretty easily.

| perl -pe 's/^\s+//'

Note: This will remove any leading whitespace. If the line is all whitespace, the \s+ will capture the newline character.
 

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XMLPRETTY(1p)						User Contributed Perl Documentation					     XMLPRETTY(1p)

NAME
xmlpretty - XML pretty printer SYNOPSIS
xmlpretty [--options] [filename] DESCRIPTION
xmlpretty is the commandline interface to XML::Handler::YAWriter, acting as a tool to add and remove pretty printing to XML files. xmlpretty has several methods to add human readablitiy. If you want to add readablity without adding so-called ignorable whitespace, use it in the following way : $ xmlpretty --AddHiddenNewline --AddHiddenAttrTab --CatchEmptyElement uglyfile.xml > prettyfile.xml If you do not want to process the file further, but only want it human readable, add visible whitespace to the file as follows : $ xmlpretty --PrettyWhiteNewline --PrettyWhiteIndent --CatchEmptyElement uglyfile.xml > prettyfile.xml You may use YAWriter to clean whitespace from XML documents. This may work in 99% of the cases where you want to get rid of ignorable whitespace caused by the various forms of pretty printing. $ xmlpretty --NoWhiteSpace --NoComments --AddHiddenNewline --AddHiddenAttrTab --CatchEmptyElement prettyfile.xml > cleanfile.xml Options Options are given in a gnu like --option idiom. AddHiddenNewline boolean Add hidden newline before ">" AddHiddenAttrTab boolean Add hidden tabulation for attributes CatchEmptyElement boolean Catch empty Elements, apply "/>" compression CatchWhiteSpace boolean Catch whitespace with comments IsSGML boolean This option will cause start_document, processing_instruction and doctype_decl to appear as SGML. The SGML is still well-formed of course, if your SAX events are well-formed. NoComments boolean Supress Comments NoDTD boolean Supress DTD NoPI boolean Supress Processing Instructions NoProlog boolean Supress <?xml ... ?> Prolog NoWhiteSpace boolean Supress WhiteSpace to clean documents from prior pretty printing. PrettyWhiteIndent boolean Add visible indent before any eventstring PrettyWhiteNewline boolean Add visible newlines before any eventstring SAX1 boolean (not yet implemented) Output only SAX1 compilant eventstrings Bugs: Automatic recoding between 8bit and 16bit does not yet work correctly ! I have Perl-5.6 at home and here I can specify "use utf8;" in the right places to make recoding work. But I dislike saying "use 5.00555;" because many systems run 5.00503. AUTHOR
Michael Koehne, Kraehe@Copyleft.De Thanks "Derksen, Eduard (Enno), CSCIO" <enno@att.com> helped me with the Escape hash and gave quite a lot of useful comments. SEE ALSO
perl and XML::Parser::PerlSAX perl v5.10.1 2010-02-18 XMLPRETTY(1p)
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