Add junest-export to export applications from Junest to the host quickly

[ivan-hc]

Hi, just done a PR at https://github.com/fsquillace/junest/pull/322

This is not much but an idea to improve the Junest's experience.

This is the content of my simple script to export my apps:

https://github.com/ivan-hc/junest/blob/master/bin/junest-export

For more improvements I need a lot of time I've not due to my real job. However I would be happy too if you check and improve this script too.

You can also test my script as a standalone program:

wget https://raw.githubusercontent.com/ivan-hc/junest/master/bin/junest-export
chmod a+x ./junest-export
./junest-export

Cheers.

[fsquillace]

Thanks @ivan-hc! Various improvements can be taken by directly looking at the equivalent code in distrobox: https://github.com/89luca89/distrobox/blob/main/distrobox-export

Some ideas for anyone willing to look at this work:

• IMO, we should start simple and consider the export app operation only (ignoring any other actions like deletion, service, completion, etc) and a very small set of options (e.g. i would not spend much time on --media)
• The command does not have to be precisely the same syntax as distrobox-export
• We can re-use the same executable junest and add an additional export command
• An example syntax:
  • junest export --desktopfile <nameofdesktopfile> --sudo
  • junest export --desktopfile redshift-gtk --sudo

Also, adding as reference a related wiki page on how to create such desktop files manually on the host: https://github.com/fsquillace/junest/wiki/How-to-create-desktop-launchers-on-programs-installed-in-JuNest

Regards, Filippo