adding ability to parse default bash variables such as ${foo:-bar}

[vito-c]

title is pretty straight forward. This let's you add default values to your docker-compose file.

web:
# unbracketed name
image: ${IMAGE:-busybox}

parsers to

web:
# unbracketed name
image: busybox

web:
# unbracketed name
image: ${IMAGE-busybox}

parsers to

web:
# unbracketed name
image: busybox

[arkban]

Does this support the ${VARIABLE-default} format (without the ":") as well? https://docs.docker.com/compose/compose-file/#variable-substitution

[vito-c]

@patrick-bohan no but I could add support for that.

[vito-c]

added support for - and some more testing.

[vito-c]

@vdemeester What is the timeline like to get merges?

[vdemeester]

LGTM 🐮