7zip.xml

<?xml version="1.0" encoding="UTF-8"?>

<packages:packages xmlns:packages="http://www.wpkg.org/packages">

  <package id="7zip" name="7-Zip" revision="%version%.1" reboot="false" priority="0">
    <variable name="version" value="19.00" />
    <variable name="fileversion" value="1900" />

    <check type="uninstall" condition="exists" path="7-Zip %version% (x64)" architecture="x64"/>
    <check type="uninstall" condition="exists" path="7-Zip %version%" architecture="x86"/>

    <install cmd="%wpkgsoftware%\7zip\7z%fileversion%-x64.exe /S" architecture="x64" />
    <install cmd="%wpkgsoftware%\7zip\7z%fileversion%.exe /S" architecture="x86" />

    <upgrade include="remove" />
    <upgrade include="install" />
    <!-- old version of package had a non-helpful revision number=920 so newer
         wpkg versions count as downgrades -->
    <downgrade include="remove"/>
    <downgrade include="install" />

    <!-- try to remove 9.20, but don't complain if it's not currently installed -->
    <remove  cmd='msiexec /qn /x{23170F69-40C1-2701-0920-000001000000}'>
      <exit code="1605" />
    </remove>

    <remove cmd='cmd.exe /c  start "" /b /wait "%programfiles%\7-zip\uninstall.exe" /S'>
      <condition>
        <check type="file" condition="exists" path="%programfiles%\7-zip\uninstall.exe"/>
      </condition>
    </remove>

  </package>
</packages:packages>