For adding a custom linux software/service like cannelloni you have to do the following steps:

1. Add repo via devtool (gitrepo stands for the url)

   devtool add gitrepo
   

   2. Try to bitbake, if it is working go to step 3

   bitbake packagename (gitrepo name)
   

   If it is not working you can do (repeating) following steps until it is working
   1. change/modify the recipe in /workspace/recipe/packagename
   2. change/modify the sources in /workspace/sources/packagename
   3. bitbake packagename

   Now update the recipe, if you do this the first time you have to adapt the license and the LIC-File-Checksum

   devtool update-recipce packagename
   

2. Build the recipe and image with devtool

   devtool build packagename
   devtool build-image agl-demo-platform
   

   If that is working you could add it to git/gerrit. You have to add your recipe to a layer.

   1. Copy files to the recipe
   2. add recipe to a packagegroup

3. Git

   git review 
   git review -s
   git remote -v update