Create $XDG_DATA_HOME/mime/packages if it does not exist

[probonopd]

Has the logic for running update-mime-database and friends already been ported over to the lib? If not, it should be done.

Before running update-mime-database we should create $XDG_DATA_HOME/mime/packages; if $XDG_DATA_HOME is either not set or empty, $HOME/.local/share/mime/packages needs to be created.

me@host:~$ ./Downloads/appimaged-x86_64\(1\).AppImage --verbose --version
appimaged, continuous build (commit 1c7986a), build 146 built on 2019-05-11 07:44:39 UTC
(...)
Directory '/home/me/.local/share/mime/packages' does not exist!
Warning: update-mime-database retuned non-zero exit code:

[probonopd]

This is still an issue.

Hi @azubieta can you please add tests that show what happens when

• $XDG_DATA_HOME is set and $XDG_DATA_HOME/mime/packages exists
• $XDG_DATA_HOME is not set and $HOME/.local/share/mime/packages exists
• $XDG_DATA_HOME is empty and $HOME/.local/share/mime/packages exists
• $XDG_DATA_HOME is set and $XDG_DATA_HOME/mime/packages does not exist
• $XDG_DATA_HOME is not set and $HOME/.local/share/mime/packages does not exist
• $XDG_DATA_HOME is empty and $HOME/.local/share/mime/packages does not exist