Need to add sub tag in existing xml file using sed or awk command in shell script

Question

I have a file called abc.xml

abc.xml

<Engine name="private" defaultHost="localhost">
    <Model name="qwerty"/>
    <Host name="localhost" />
    </Engine>

I would like to add subtag in Host tag so that my modified abc.xml will look like as below.

<Engine name="private" defaultHost="localhost">
<Model name="qwerty"/>
    <Host name="localhost" company="jaguar" >
       <Partner name="xxx" />
       <Partner name="yyy" />
    </Host>
    </Engine>

How to achieve above changes using SED or awk command?

I don't see a question here. Recommend you read: stackoverflow.com/help/how-to-ask — Philip Pittle
– Philip Pittle, Commented Jun 14, 2016 at 4:37
How to achieve above mentioned change using sed or awk command ? — Maverick
– Maverick, Commented Jun 14, 2016 at 4:37
Please update the question text to reflect this. And welcome to Stack Overflow! — Philip Pittle
– Philip Pittle, Commented Jun 14, 2016 at 4:39
1) searching for the pattern "<Host" and deleting the whole line and adding new line instead with my changes 2) used command "$temp::2" where temp will have my pattern match string. this will remove "/>" from the end of "<Host ... />" tag. and added manually ">" at the end. — Maverick
– Maverick, Commented Jun 14, 2016 at 4:44

Michael Vehrs · Accepted Answer · 2016-06-14 05:35:11Z

1

With xmlstarlet, you could do it like this:

 xmlstarlet ed -i //Host -t attr -n company -v jaguar \
    -s //Host -t elem -n Partner \
    -i //Host/Partner -t attr -n name -v xxx \
    -s //Host -t elem -n Partner \
    -i //Host/Partner[2] -t attr -n name -v yyy abc.xml

Now, this looks a bit more involved, but it is aware of the structure of your file.

answered Jun 14, 2016 at 5:35

Michael Vehrs

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Chet · Accepted Answer · 2016-06-14 04:58:55Z

0

cat ins.txt

<Host name="localhost" company="jaguar" >
       <Partner name="xxx" />
       <Partner name="yyy" />

cat abc.xml

<Engine name="private" defaultHost="localhost">
    <Model name="qwerty"/>
    <Host name="localhost" />
    </Engine>

cat script.awk

BEGIN{RS=""}
ARGV[1]==FILENAME{ins=$0;RS="\n";next}
/<Host/ {print ins;next} 1

awk -f script.awk ins.txt abc.xml

<Engine name="private" defaultHost="localhost">
    <Model name="qwerty"/>
    <Host name="localhost" company="jaguar" >
       <Partner name="xxx" />
       <Partner name="yyy" />
    </Engine>

answered Jun 14, 2016 at 4:58

Chet

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