Add attribute that does not yet exist in xml element with xmlstarlet

Question

I have an xml file beginning with

<?xml version='1.0' encoding='utf-8'?>
<widget 
  id="io.ionic.starter" 
  version="0.0.1" 
  xmlns="http://www.w3.org/ns/widgets" 
  xmlns:cdv="http://cordova.apache.org/ns/1.0"
>

I need to add a ios-CFBundleVersion="de.test" attribute so it should look like this:

<?xml version='1.0' encoding='utf-8'?>
<widget 
  id="io.ionic.starter" 
  version="0.0.1" 
  xmlns="http://www.w3.org/ns/widgets" 
  xmlns:cdv="http://cordova.apache.org/ns/1.0"
  ios-CFBundleVersion="de.test"
>

I've tried it with xmlstarlet:

xmlstarlet edit \
  -O \
  --inplace \
  --insert "widget" \
  --type attr \
  -n ios-CFBundleVersion \
  -v de.test \
  config.xml

but nothing happens in my file config.xml. What would be the correct xmlstarlet command here?

zx485 · Accepted Answer · 2018-05-24 13:22:10Z

3

You forgot that the widget element has a namespace, hence your XPath didn't match. So define one with the -N global option and your command starts to work:

xmlstarlet edit --inplace -O -N x=http://www.w3.org/ns/widgets  \
                --insert "x:widget" --type attr \
                -n "ios-CFBundleVersion" -v "de.test" config.xml

answered May 24, 2018 at 13:22

zx485

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