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<a href="https://invent.kde.org/tfry">Thomas Friedrichsmeier</a>
<a href="https://invent.kde.org/education/rkward/-/issues/13#note_436361">commented</a>:
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<p dir="auto"><a href="https://github.com/flathub/flathub/pull/3042" rel="nofollow noreferrer noopener" target="_blank">https://github.com/flathub/flathub/pull/3042</a></p>
<p dir="auto">On hold for now, because executing binaries outside the sandbox fails due to problems with the paths they see: <a href="https://docs.flatpak.org/en/latest/sandbox-permissions.html" rel="nofollow noreferrer noopener" target="_blank">https://docs.flatpak.org/en/latest/sandbox-permissions.html</a> (e.g. gcc would be at /var/run/host/usr/bin, and can be started, but will fail as soon as it looks for any other files in /usr; same for R).</p>
<p dir="auto">Plan to work around this:</p>
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<li>Create a chroot-wrapper to start external R. The chroot dir (inside /app, I guess) will have the standard paths mapped in.</li>
<li>Start system-installed R inside that chroot.</li>
<li>Whenever passing paths between frontend and backend, make sure to map them as appropriate (this is going to be quite a hassle, but is a long-term-plan anyway, in order to allow remote R backends, for instance).</li>
<li>R will no longer be bundled inside the flatpak, after this, but be an external dependency (if allowed)</li>
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<p dir="auto">For reference:
flatpak cheat-cheet: <a href="https://develop.kde.org/docs/build/flatpak/publishing/" rel="nofollow noreferrer noopener" target="_blank">https://develop.kde.org/docs/build/flatpak/publishing/</a></p>
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