During a conversation with @niemeyer it came to our attention that just echoing a value at the end of the script defined in
version-script would make it, on one hand error prone and on the other not extensible.
The proposal is to instead of
echo in the script to instead call these shell functions:
So in an example this would look like:
version: 1.0 version-script: | # We just want the version with a date appended set-version $SNAPCRAFT_PROJECT_VERSION-$(date +%Y%m%d.%H%m) # The grade will be stable on the 15th of every month and devel for every other day # THIS IS JUST AN EXAMPLE if [ $(date +%d) = "15" ]; then set-grade stable else set-grade devel
The helper functions setup by snapcraft will do the appropriate validations to determine if valid values are being passed on and provide appropriate error messages.
With the introduction of this feature, the echoing one would go away.