Qt Installer Framework. How to enable overwrite installation

Question

The last post about overwriting existing installation was 3 years ago on QtIFW 2, 3, so I hope this won't count as duplicate posting.

I have a Mac installer setup that have 2 components: a standalone app, a VST3 audio plugin. The standalone is located in @TargetDir@ (which is /Applications/MyApp) and the plugin is located in (/Library/Audio/Plug-Ins/VST/MyApp.vst3)

To install the vst3 in Library I use CopyDirectory on createOperationsForArchive in the installscript.qs

// File at installer/packages/com.packagename/meta/installscript.qs
function Component()
{
}

Component.prototype.createOperationsForArchive = function(archive)
{
    // Extract data to pluto folder in Orpheus
    component.addOperation("Extract", archive, "@TargetDir@/myplugin/");

    // Copy plugin to Library
    component.addElevatedOperation(
        "CopyDirectory",
        "@TargetDir@/myplugin/Myplugin.component",
        "/Library/Audio/Plug-Ins/Components/"
    );
}

I would like the installer to be able to overwrite the app if already exists. My thinking was to add a remove script before CopyDirectory. So I added below codes to before CopyDirectory operation:

component.addElevatedOperation(
    "Execute", "bash",
    "rm", "-rf", "/Library/Audio/Plug-Ins/Components/Pluto.component"
);

But I got permission error exit code 126.

I also tried Rmdir operation, but got Cannon remove directory error with Undefined error:0 error.

Another option seems to be to invoke maintenance tool but I don't know how to add a specific path to delete for the plugin as the maintenance tool will only delete what is in TargetDir.

Any suggestion please?

score 1 · Answer 1 · answered Jan 11 '21 at 14:09

Found the solution by checking the installation log, when I accidentally add the UNDOEXECUTE argument to CopyDirectory

Invalid argument in CopyDirectory: Third argument needs to be forceOverwrite, if specified. Retry|Ignore|Cancel

So the solution to overwrite using CopyDirectory is simply:

component.addElevatedOperation(
    "CopyDirectory",
    "@TargetDir@/pluto/Myplugin.component",
    "/Library/Audio/Plug-Ins/Components/",
    "forceOverwrite")

This is quite tricky because forceOverwite is no where to be found in the Documentation: https://doc.qt.io/qtinstallerframework/operations.html

Qt Installer Framework. How to enable overwrite installation

1 Answers1