I wanted to add Inkscape repository to download Inkscape 1.0 which is not available in the default elementary repository. Before I've ever done sudo add-apt-repository and it just worked fine. Only recently when I tried to add Krita's repo it didn't work and have some
aptsources.distro.NoDistroTemplateException: Error: could not find a distribution template for elementary/hera so I did a workaround by manually adding the link to synaptic. But the problem is, ppa for Inkscape is not a http but ppa: and when I tried to manually do the same it couldn't find the repository.
Here's the full result of
sudo add-apt-repository ppa:inkscape.dev/stable
Traceback (most recent call last): File "/usr/bin/add-apt-repository", line 107, in sp = SoftwareProperties(options=options) File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 117, in init self.reload_sourceslist() File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 612, in reload_sourceslist self.distro.get_sources(self.sourceslist)
File "/usr/lib/python3/dist-packages/aptsources/distro.py", line 93, in get_sources (self.id, self.codename))
aptsources.distro.NoDistroTemplateException: Error: could not find a distribution template for elementary/hera
There's a similar question here but I guess it only works for Freya.
Here's the output of
DISTRIB_DESCRIPTION="elementary OS 5.1.3 Hera"