Ulauncher: ProjectPathNotFoundError on startup

[BartWillems]

I've installed Ulauncher through the AUR and is crashes on startup.
I've already installed the python2-notify package.

Steps to reproduce:
Start Ulauncher

Ulauncher version:
Ulauncher version 4.1.0.r1
Linux distro:
Arch Linux
Desktop environment:
KDE 5.13

Logs:

https://gist.github.com/BartWillems/4c1dfbc182592e3cfbfb6ad04f038d74

[gornostal]

I found a VBox image with Arch and KDE 5.13, but wasn't able to reproduce the issue there.
Perhaps you could provide a VBox image where the issue exists?

How do you install Ulauncher? Do you run this command?

git clone https://aur.archlinux.org/ulauncher.git && cd ulauncher && makepkg -is

[BartWillems]

For some reason, I can't reproduce it with the newest version. I also had some python updates, so maybe one of them was bugged?

I installed it from the AUR btw.

[friday]

I can reproduce this in Arch using yay to install:

yay -Syu --noconfirm ulauncher
ulauncher -v

It does not happen if installing with pamac (gui installer) or the official instructions
(git clone https://aur.archlinux.org/ulauncher.git && cd ulauncher && makepkg -is).

This "fixes" it for me (discovered while trying to debug). I have no idea why:
sudo touch /usr/lib/python2.7/site-packages/ulauncher/config.py

Full error:

2018-09-11 17:28:04,690 | ERROR | ulauncher: except_hook() | Uncaught exception
Traceback (most recent call last):
  File "/usr/bin/ulauncher", line 25, in <module>
    main()
  File "/usr/lib/python2.7/site-packages/ulauncher/main.py", line 120, in main
    window = UlauncherWindow.get_instance()
  File "/usr/lib/python2.7/site-packages/ulauncher/util/decorator/singleton.py", line 16, in wrapper
    instance = fn(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/ulauncher/ui/windows/UlauncherWindow.py", line 52, in get_instance
    return cls()
  File "/usr/lib/python2.7/site-packages/ulauncher/ui/windows/UlauncherWindow.py", line 60, in __new__
    builder = Builder.new_from_file('UlauncherWindow')
  File "/usr/lib/python2.7/site-packages/ulauncher/ui/windows/Builder.py", line 43, in new_from_file
    ui_filename = get_data_file('ui', '%s.ui' % (builder_file_name,))
  File "/usr/lib/python2.7/site-packages/ulauncher/config.py", line 40, in get_data_file
    return os.path.join(get_data_path(), *path_segments)
  File "/usr/lib/python2.7/site-packages/ulauncher/config.py", line 57, in get_data_path
    raise ProjectPathNotFoundError(abs_data_path)
ProjectPathNotFoundError: /usr/lib/python2.7/site-packages/data

[noam09]

Same here, happened with the previous upgrades as well. "Manual" install (below) works, but via yay does not.

git clone https://aur.archlinux.org/ulauncher.git && cd ulauncher && makepkg -is

[gornostal]

I can reproduce this in Arch using yay to install:

Finally we know steps to reproduce :)
Thanks @friday, @noam09

I'm going to see if I can find a workaround that doesn't require an extra step for a user

[gornostal]

It's fixed now. Turns out python cache files were not removed with yay install