[Bug 1554010] Re: Paths ($PATH, $LD_LIBRARY_PATH) in click package are set up in wrong order

[Pat McGowan]

** Also affects: click (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: canonical-devices-system-image
       Status: New => Confirmed

** Changed in: canonical-devices-system-image
     Assignee: (unassigned) => Alejandro J. Cura (alecu)

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https://bugs.launchpad.net/bugs/1554010

Title:
  Paths ($PATH, $LD_LIBRARY_PATH) in click package are set up in wrong
  order

Status in Canonical System Image:
  Confirmed
Status in click package in Ubuntu:
  New

Bug description:
  When binaries in click packages are launched, the paths inside the
  click package are added to PATH and LD_LIBRARY_PATH so that app
  developers don't need to fiddle with wrapper scripts when they ship
  their own dependencies.

  This usually works nicely, but can start to fail in unexpected ways if
  the seed for the image changes or the user enables writeable mode and
  apt-get installs things. As soon as self-shipped binaries and
  libraries show up in the system with the same name for whatever
  reason, those take precedence and the system-installed binary/library
  is loaded instead of the one in the click package.

  To solve this, the package-local variables should be set up in a
  different order, so that package-local stuff has precedence.

  
  This can be reproduced with the example of the app netscan.mzanetti in the store. It works fine when installing it on a freshly flashed device. Now enable rw mode and apt-get install nmap. The app will start failing.

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