Get a specific attribute from XML file using Ansible xml module - xpath

Question

I have an XML file as below
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleExecutable</key>
<string>p4v</string>
<key>CFBundlePackageType</key>
<string>APPL</string>
<key>CFBundleShortVersionString</key>
<string>2018.2</string>
<key>CFBundleVersion</key>
<string>2018.2/1666551</string>
<key>CFBundleGetInfoString</key>
<string>2018.2, Copyright 2018 Perforce Software, Inc.</string>
<key>CFBundleIconFile</key>
<string>application.icns</string>
<key>P4RevString</key>
<string>P4V/MACOSX1013X86_64/2018.2/1666551 (2018/05/30)</string>
<key>NSPrincipalClass</key>
<string>NSApplication</string>
<key>NSHighResolutionCapable</key>
<string>True</string>
<key>CFBundleName</key>
<string>P4V</string>
<key>CFBundleSignature</key>
<string>P4VC</string>
<key>CFBundleIdentifier</key>
<string>com.perforce.p4v</string>
</dict>
</plist>
How can I get the string 2018.2 for key CFBundleShortVersionString?
I have tried something like below but its listing all string values instead of one matching the provided key.
- xml:
path: /Applications/p4v.app/Contents/Info.plist
xpath: /plist/dict[starts-with(key,'CFBundleShortVersionString')]/string
attribute: CFBundleShortVersionString
content: 'text'
register: p4v_version
I think I am providing the wrong xpath here, but I couldn't find the correct one.

Answer 1

You don't need attribute here at all, and if there are no other <dict>-s, you can leave out the first condition.
- xml:
path: /Applications/p4v.app/Contents/Info.plist
xpath: /plist/dict/key[.='CFBundleShortVersionString']/following-sibling::*[1]
content: 'text'
register: p4v_version