[Bug 1987958] Re: ubiquity desktop entry not "trusted"/not marked as executable bit

[Sean Davis]

Still present on Xubuntu Mantic 230917.

The Xfce Thunar docs have instructions on how to trust the executable:
https://docs.xfce.org/xfce/thunar/custom-actions#trust_multiple_desktop_files_at_once

For multiple files:
for f in %F; do sha256sum "$f" | awk '{print $1}' | xargs gio set "$f" metadata::xfce-exe-checksum && chmod +x "$f"; done

Just for ubiquity.desktop:
gio set ubiquity.desktop metadata::xfce-exe-checksum `sha256sum ubiquity.desktop | awk '{print $1}'`

After running this command, I can verify that the launcher is now
trusted.

Is this something that can be added to Ubiquity, or should we make this
part of Xubuntu's live session startup?

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https://bugs.launchpad.net/bugs/1987958

Title:
  ubiquity desktop entry not "trusted"/not marked as executable bit

Status in ubiquity package in Ubuntu:
  Triaged

Bug description:
  For some reason on Xubuntu (Daily 22.10 kinetic images), when
  launching Ubiquity from the desktop, it says it is not trusted.

  "Untrusted application launcher - The desktop file "ubiquity.desktop"
  is in an insecure location and not marked as executable. If you do not
  trust this program, click Cancel.

  [Exec line in the .desktop file]"

  ProblemType: Bug
  DistroRelease: Ubuntu 22.10
  Package: ubiquity 22.10.6
  ProcVersionSignature: Ubuntu 5.15.0-27.28-generic 5.15.30
  Uname: Linux 5.15.0-27-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.22.0-0ubuntu4
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.473
  CurrentDesktop: XFCE
  Date: Sat Aug 27 22:56:16 2022
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/xubuntu.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Xubuntu 22.10 "Kinetic Kudu" - Alpha amd64 (20220827)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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