Hmm calibre does show up for me gnome-software.

But calibre itself does ship three appstream metainfo files

            <Path fileType="data">/usr/share/metainfo/calibre-ebook-edit.metainfo.xml</Path>
            <Path fileType="data">/usr/share/metainfo/calibre-ebook-viewer.metainfo.xml</Path>
            <Path fileType="data">/usr/share/metainfo/calibre-gui.metainfo.xml</Path>

calibre-gui.metainfo.xml succeeds but the other two don't. Calibre would have to be subpackaged for generation of the other two appstream files to succeed or they can be removed so they don't "fail".

Oh, weird- it shows up twice! Most items show up once, and you can select which repo you want to pull from. DisplayCAL for example. Is Calibre not doing that because of these multiple files?

Oh, weird- it shows up twice! Most items show up once, and you can select which repo you want to pull from. DisplayCAL for example. Is Calibre not doing that because of these multiple files?

Possibly, when the flatpak appstream data and the distro appstream data don't match 1-1 for a package it'll normally show up as different entries.

Related meta issue #6

I strongly recommend against removing the other metainfo entries. Calibre users expect all 4 entries to be present in the application menu, as intended by the author. They are present in Windows and other Linux distros (seen in Ubuntu).

I have Calibre installed on Windows 10, and these are the 4 different menu entries, which correspond to those metainfo entries.

• "Calibre" (the main program)
• "Edit E-book 64bit" - "C:\Program Files\Calibre2\ebook-edit.exe"
• "E-book Viewer 64bit" - "C:\Program Files\Calibre2\ebook-viewer.exe"
• "LRF viewer" - "C:\Program Files\Calibre2\lrfviewer.exe"

On Solus Plasma, I had installed Calibre through the script the author provides, rather than eopkg.

sudo -v && wget -nv -O- https://download.calibre-ebook.com/linux-installer.sh | sudo sh /dev/stdin

These menu entries are present, as expected.
I had installed Calibre on Ubuntu using the same methods, and there all 4 entries are also present as expected.

We should make our install of Calibre match what the author intended.
The binaries are present on my system as:

~ ❯❯❯ ll /usr/bin/ |rg "ebook-viewer|ebook-edit|lrfviewer"
lrwxrwxrwx   1 root   root      23 Jan 19 18:13 ebook-edit -> /opt/calibre/ebook-edit*
lrwxrwxrwx   1 root   root      25 Jan 19 18:13 ebook-viewer -> /opt/calibre/ebook-viewer*
lrwxrwxrwx   1 root   root      22 Jan 19 18:13 lrfviewer -> /opt/calibre/lrfviewer*

To be clear, when this issue is fixed, we should also make sure the package still correctly shows all 4 entries in the app menu after installation.

Deleting the other appstream data won't affect the availibilty of desktop files/menu entries of the application. It will just make it easier to generate appstream metainfo/application entries in the software center. It is not like we want multiple entries of calibre in the software center. I will try experiment removing the other appstream data.