update YAML file using YQ in GitlabCI - gitlab-ci

Question

So basically, I have this command that runs in Gitlab CI to update a field in YAML configuration before packaging and pushing a Helm chart.
yq -i -y ".pod.image.imageTag="${CI_COMMIT_SHORT_SHA}"" deployment/values.yaml
values.yaml
pod:
image:
repository: my.private.repo/my-project
imageTag: 'latest'
nodegroupName: "nessie-nodegroup"
But I keep getting this error.
jq: error: syntax error, unexpected IDENT, expecting $end (Unix shell quoting issues?)
.pod.image.imageTag=4c0118bf
The variable is actually read but it looks like I'm doing something wrong in the yq command.
Any ideas where that error is coming from ? Trying with only one quote doesn't read the environment variable obviously. I already tried it.
Update:
Trying with :
yq -i -y '.pod.image.imageTag="${CI_COMMIT_SHORT_SHA}"' deployment/values.yaml
and
yq -i -y .pod.image.imageTag="${CI_COMMIT_SHORT_SHA}" deployment/values.yaml
didn't work either.

Answer 1

With the -y option I assume you are using the kislyuk/yq implementation.
Use jq's --arg option to introduce values from shell:
yq -i -y --arg tag "${CI_COMMIT_SHORT_SHA}" '.pod.image.imageTag=$tag' deployment/values.yaml

Answer 2

Since the Q has been tagged jq, it might be worth mentioning that the Go implementation of jq supports YAML, so e.g.:
CI_COMMIT_SHORT_SHA=foo
gojq --yaml-input --yaml-output --arg tag "${CI_COMMIT_SHORT_SHA}" '
.pod.image.imageTag=$tag
' values.yaml
produces
pod:
image:
imageTag: foo
repository: my.private.repo/my-project
nodegroupName: nessie-nodegroup
Notice, though, that gojq sorts the keys.