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Top Forums Shell Programming and Scripting Insert text after match in XML file Post 303006899 by Don Cragun on Wednesday 8th of November 2017 09:55:54 PM
Old 11-08-2017
I would be tempted to try a different approach. The following invokes awk once no matter how many XML files you have to process. This should be a lot faster than invoking ls once and invoking less, grep, and head once per file processed and cut four times per file processed and sed three times per file processed. Try:
Code:
#!/bin/bash
awk -F'[<>]' '
function copyback(filename) {
	if(filename == "")
		return
	for(i = 1; i <= lc; i++)
		print line[i] > filename
	close(filename)
	lc = 0
}
FNR == 1 {
	copyback(lastfile)
	print "Processing " FILENAME
	found = 0
	lastfile = FILENAME
}
found {	line[++lc] = $0
	next
}
$2 == "Name" && $4 == "/Name" {
	line[++lc] = $0
	n = split($3, names, /, */)
	line[++lc] = sprintf("\t<LastName>%s</Lastname>", names[1])
	if(n >= 2)
		line[++lc] = sprintf("\t<FirstName>%s</FirstName>", names[2])
	found = 1
}
END {	copyback(lastfile)
}' *.xml

If someone else wants to try this on a Solaris/SunOS system, change awk to /usr/xpg4/bin/awk or nawk.

Last edited by Don Cragun; 11-08-2017 at 11:02 PM.. Reason: Correct indentation in awk script.
 

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XO(1)							    BSD General Commands Manual 						     XO(1)

NAME
xo -- emit formatted output based on format string and arguments SYNOPSIS
xo [-options] [argument...] DESCRIPTION
The xo utility allows command line access to the functionality of the libxo library. Using xo, shell scripts can emit XML, JSON, or HTML using the same commands that emit text output. --close <path> Close tags for the given path --depth <num> Set the depth for pretty printing --help Display this help text --html OR -H Generate HTML output --json OR -J Generate JSON output --leading-xpath <path> Add a prefix to generated XPaths (HTML) --open <path> Open tags for the given path --pretty OR -p Make 'pretty' output (add indent, newlines) --style <style> Generate given style (xml, json, text, html) --text OR -T Generate text output (the default style) --version Display version information --warn OR -W Display warnings in text on stderr --warn-xml Display warnings in xml on stdout --wrap <path> Wrap output in a set of containers --xml OR -X Generate XML output --xpath Add XPath data to HTML output The xo utility accepts a format string suitable for xo_emit(3) and a set of zero or more arguments used to supply data for that string. xo "The {k:name} weighs {:weight/%d} pounds.0 fish 6 TEXT: The fish weighs 6 pounds. XML: <name>fish</name> <weight>6</weight> JSON: "name": "fish", "weight": 6 HTML: <div class="line"> <div class="text">The </div> <div class="data" data-tag="name">fish</div> <div class="text"> weighs </div> <div class="data" data-tag="weight">6</div> <div class="text"> pounds.</div> </div> The --wrap <path> option can be used to wrap emitted content in a specific hierarchy. The path is a set of hierarchical names separated by the '/' character. xo --wrap top/a/b/c '{:tag}' value XML: <top> <a> <b> <c> <tag>value</tag> </c> </b> </a> </top> JSON: "top": { "a": { "b": { "c": { "tag": "value" } } } } The --open <path> and --close <path> can be used to emit hierarchical information without the matching close and open tag. This allows a shell script to emit open tags, data, and then close tags. The --depth option may be used to set the depth for indentation. The --leading-xpath may be used to prepend data to the XPath values used for HTML output style. #!/bin/sh xo --open top/data xo --depth 2 '{tag}' value xo --close top/data XML: <top> <data> <tag>value</tag> </data> </top> JSON: "top": { "data": { "tag": "value" } } EXAMPLE
% xo 'The {:product} is {:status}0 stereo "in route" The stereo is in route % xo -p -X 'The {:product} is {:status}0 stereo "in route" <product>stereo</product> <status>in route</status> ADDITIONAL DOCUMENTATION
Complete documentation can be found on github: http://juniper.github.io/libxo/libxo-manual.html libxo lives on github as: https://github.com/Juniper/libxo The latest release of libxo is available at: https://github.com/Juniper/libxo/releases SEE ALSO
libxo(3), xo_emit(3) HISTORY
The libxo library was added in FreeBSD 11.0. AUTHOR
Phil Shafer BSD
December 4, 2014 BSD
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