How to change property value with augeas which position changes in XML?

Question

I have the following problem:

my XML (simplified):

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <properties>
    <property name="username">USERNAME</property>
    <property name="anything">blabla</property>
  </properties>
</configuration>

I need to replace the Username value with augeas. It works fine with:

augtool> set /files/test.xml/configuration/properties/property[1]/#text NEWUSER

But the problem is: The username entry is NOT always on position one. Is there a way in augeas to look for the position with "match" or some kind of regex?

augtool> match /files/test.xml/configuration/properties/*/#attribute/name  username

works fine an results in

/files/test.xml/configuration/properties/property[1]/#attribute/name

But i don't know how to use this information when setting a value.

By default augeas can only view files in /etc/ and /boot, did you create a custom lens ? — spuder, Nov 15 '13 at 06:10

score 7 · Accepted Answer · answered Jun 04 '13 at 13:43

7

What you need to do is:

set /files/test.xml/configuration/properties/property[#attribute/name='username']/#text NEWUSER

This selects the property (/files/test.xml/configuration/properties/property) whose #attribute/name subnode matches username, and sets its #text subnode as NEWUSER.

answered Jun 04 '13 at 13:43

raphink

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How can I check insert a new XML element with above attribute if it does not exist, and modify the XML element with the above attribute if it does exist? – fruitJuice May 05 '15 at 23:59

How to change property value with augeas which position changes in XML?

1 Answers1