Can I modify an xml file only from command line? - bash

Question

There is an auto-generated xml file.
<?xml version="1.0" encoding="UTF-8"?>
<widget id="some ID" modes="max">
<icon src="icon.png"/>
<name>StackOverflow</name>
<feature name="some feature"/>
I would like to achieve following:
subtitute modes with "full"
subtitute name with ${name}
remove <feature>
add <content src="index.html"/> in between <icon> and <name>
Can this be done?
[adding more background]
It is an website mostly made of node.js. This shell command will be run on server-side Javascript and will be executed using child_process.exec().

Answer 1

Since awk is also an standard GNU tool, I think it might meet your requirement.
It's an very straightforward script you can adopt.
awk '
/modes/{gsub(/modes=".*"/,"modes=\"full\"") }
/<icon/{$0=$0"\n <content src=\"index.html\"/>"}
/<name>/{gsub(/>.*</,">$name<")}
!/feature/{print}
' Your_XML_file
Output:
<?xml version="1.0" encoding="UTF-8"?>
<widget id="some ID" modes="full">
<icon src="icon.png"/>
<content src="index.html"/>
<name>$name</name>
And here's the brief explain I would give,
find modes and in your xml file, and modify as you desire
find "< icon", and insert below it.
remove the line contain feature