wpkg-openattachmentbyextension/packages/openattachmentbyextension.xml

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

<packages>
    <package id="openattachmentbyextension"
             name="Open Attachments By Extension"
             revision="1"
             reboot="false"
             priority="10">

        <!-- 7zip est nécessaire pour extraire l'XPI -->
        <depends package-id="7zip" />
        <!-- Et bien sur, Thunderbird aussi est nécessaire ;-) -->
        <depends package-id="thunderbird" />
        <depends package-id="thunderbird-config" />
        <!-- SumatraPDF est nécessaire pour l'ouverture des fichiers -->
        <depends package-id="sumatrapdf" />

        <variable name="PKG_VERSION" value="0.3.5" />
        <variable architecture="x86" name="INSTALL_PATH" value="%PROGRAMFILES%\Mozilla Thunderbird\distribution\bundles\openattachmentbyextension" />
        <variable architecture="x64" name="INSTALL_PATH" value="%PROGRAMFILES(x86)%\Mozilla Thunderbird\distribution\bundles\openattachmentbyextension" />

        <check type="execute" path='%COMSPEC% /C type "%INSTALL_PATH%\install.rdf" | find /I "&lt;em:version&gt;%PKG_VERSION%"' condition="exitcodeequalto" value="0" />

        <install include="remove" />
        <install cmd='%COMSPEC% /C if not exist "%INSTALL_PATH%" mkdir "%INSTALL_PATH%"' />
        <install cmd='"%SOFTWARE%\7zip\unzip.bat" "%SOFTWARE%\thunderbird_addons\OpenAttachmentByExtension-%PKG_VERSION%.xpi" "%INSTALL_PATH%"' />

        <upgrade include="install" />

        <remove cmd='taskkill /F /IM thunderbird.exe'>
            <exit code="0" />
            <exit code="128" />
        </remove>
        <remove cmd='%COMSPEC% /C if exist "%INSTALL_PATH%" del /Q /F "%INSTALL_PATH%"' />

    </package>
</packages>