builds(checkver): Support XML default namespace (#5191)

Author: niheaven

CHANGELOG.md

@@ -13,6 +13,7 @@
 ### Builds
 
 - **auto-pr:** Add `CommitMessageFormat` option ([#5171](https://github.com/ScoopInstaller/Scoop/issues/5171))
+- **checkver:** Support XML default namespace ([#5191](https://github.com/ScoopInstaller/Scoop/issues/5191))
 
 ## [v0.3.0](https://github.com/ScoopInstaller/Scoop/compare/v0.2.4...v0.3.0) - 2022-10-10
 

bin/checkver.ps1

@@ -310,12 +310,17 @@ while ($in_progress -gt 0) {
             # Then add them into the NamespaceManager
             $nsmgr = New-Object System.Xml.XmlNamespaceManager($xml.NameTable)
             $nsList | ForEach-Object {
-                $nsmgr.AddNamespace($_.LocalName, $_.Value)
+                if ($_.LocalName -eq 'xmlns') {
+                    $nsmgr.AddNamespace('ns', $_.Value)
+                    $xpath = $xpath -replace '/([^:/]+)((?=/)|(?=$))', '/ns:$1'
+                } else {
+                    $nsmgr.AddNamespace($_.LocalName, $_.Value)
+                }
             }
             # Getting version from XML, using XPath
             $ver = $xml.SelectSingleNode($xpath, $nsmgr).'#text'
             if (!$ver) {
-                next "couldn't find '$xpath' in $url"
+                next "couldn't find '$($xpath -replace 'ns:', '')' in $url"
                 continue
             }
         }