[Bug 1771858] Re: /snap/bin not in default PATH for units, snapd should ship system-environment-generators to inject /snap/bin into $PATH

[Dimitri John Ledkov]

Using systemd 237-3ubuntu10.10, executing the test case i see /snap/bin
in path

ubuntu at ubuntu:~$ dpkg-query -W systemd
systemd	237-3ubuntu10.10
ubuntu at ubuntu:~$ sudo systemd-run /usr/bin/env
[sudo] password for ubuntu: 
Running as unit: run-rc05da62ca3b445e4b3259a6a17063a61.service
ubuntu at ubuntu:~$ journalctl -e | grep PATH
Dec 04 12:19:11 ubuntu env[1671]: PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin


** Tags removed: verification-needed verification-needed-bionic
** Tags added: verification-done verification-done-bionic

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https://bugs.launchpad.net/bugs/1771858

Title:
  /snap/bin not in default PATH for units, snapd should ship system-
  environment-generators to inject /snap/bin into $PATH

Status in snapd package in Ubuntu:
  Confirmed
Status in systemd package in Ubuntu:
  Fix Released
Status in snapd source package in Xenial:
  Confirmed
Status in systemd source package in Xenial:
  Confirmed
Status in snapd source package in Bionic:
  Confirmed
Status in systemd source package in Bionic:
  Fix Committed
Status in snapd source package in Cosmic:
  Confirmed
Status in systemd source package in Cosmic:
  Fix Released

Bug description:
  [Impact]

   * This means that software installed via snap isn't transparently
  available for units to use.  As snaps are first-class citizens in
  Ubuntu, we should update the PATH.

   * When a generator started to be provided by systemd, it was
  recognized that $PATH is not correctly set, nonetheless, due to an
  environment bug that systemd generators run in.

  [Testcase]

  $ systemd-run /usr/bin/env
  $ journalctl -e | grep PATH

  Output should contain /snap/bin

  Output should contain a complete and a valid PATH, i.e.
  PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin" or similar.

  [Regression Potential]

   * snapd generator was already fixed separately to cause no harm, when
  running under a broken systemd. With the corrected environment,
  generators will now run with a correct PATH out of the box. A slight
  change of PATH will be observed by all generators, when running in
  containers/initramfs-less boots. However most generators will not be
  affected as they typically do not execute external binaries.

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