Stash/unstash of $PATH doesn't remove path correctly

[Dmitry Kabanov, PhD]

I have the following bug.

I try to stash two paths to $PATH. I will call them below like this:

• code/bin is my custom path (in the log below it is /home/kabanod/job/ffm/shock-attached/code/bin)
• python/bin is path to python interpreter (in the log below it is /home/kabanod/apps/python/3.4/bin)

What do I do? In .autoenv.zsh I prepend $PATH with the path to the python/bin directory using Environment Modules command (module load python/3.4) and then prepend $PATH with code/bin path (using stash command). In .autoenv_leave.zsh I unstash $PATH from my code/bin path and then unload python/bin path.

Expected behavior. Both paths are removed from $PATH.

What happens. python/bin path is removed from $PATH, however, an explicit call to stash doesn't remove code/bin path from $PATH.

I also tried to use autostash functionality with no success.

This is the full log:

kabanod@kw12608 ~/job/ffm/shock-attached
  % echo $PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

kabanod@kw12608 ~/job/ffm/shock-attached
  % cd good-experiments 
Attempting to load unauthorized env file!
-rw-r--r-- 1 kabanod kw-users 260 May 22 18:21 /home/kabanod/job/ffm/shock-attached/good-experiments/.autoenv.zsh

**********************************************

echo "Begin '.autoenv.zsh': " $PATH
module load python/3.4
echo "After 'module load python/3.4': " $PATH

code_path=$HOME/job/ffm/shock-attached/code

autostash PYTHONPATH=$code_path:
stash PATH=$code_path/bin:$PATH
echo "After stash: " $PATH

unset code_path

**********************************************

Would you like to authorize it? (type 'yes') yes
Begin '.autoenv.zsh':  /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
After 'module load python/3.4':  /home/kabanod/apps/python/3.4/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
After stash:  /home/kabanod/job/ffm/shock-attached/code/bin:/home/kabanod/apps/python/3.4/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

kabanod@kw12608 ~/job/ffm/shock-attached/good-experiments
± % cd ..
Attempting to load unauthorized env file!
-rw-r--r-- 1 kabanod kw-users 157 May 22 18:21 /home/kabanod/job/ffm/shock-attached/good-experiments/.autoenv_leave.zsh

**********************************************

echo "Begin '.autoenv_leave.zsh': " $PATH
unstash PATH
echo "After unstash: " $PATH
module unload python/3.4
echo "After 'module unload python/3.4': " $PATH

**********************************************

Would you like to authorize it? (type 'yes') yes
Begin '.autoenv_leave.zsh':  /home/kabanod/job/ffm/shock-attached/code/bin:/home/kabanod/apps/python/3.4/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
After unstash:  /home/kabanod/job/ffm/shock-attached/code/bin:/home/kabanod/apps/python/3.4/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
After 'module unload python/3.4':  /home/kabanod/job/ffm/shock-attached/code/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

kabanod@kw12608 ~/job/ffm/shock-attached
  % echo $PATH
/home/kabanod/job/ffm/shock-attached/code/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

[Daniel Hahler]

It would be great/helpful if you could create a failing test for that (in a PR).

But (from only skimming it) it sounds like stashing only supports one level?!

[Dmitry Kabanov, PhD]

@blueyed What do you mean by "a failing test"? Something simpler, which can be run by others?

[Daniel Hahler]

@dmitry-kabanov
There's a test suite - please look into tests/*.t.

[Daniel Hahler]

The problem is that the current dir during the "leave" event is the new dir, and therefore the "unstash" does not find the expected old value (which is based on the directory).
(see 986a760)
#72 should fix this, by setting varstash_dir when sourcing the "leave" file.

However, using autostash / autounstash should have worked before already.