Unable to build manifests from main branch

[Tomáš Burda]

What happened?
When attempting to build manifests from the main branch, the process fails with the following error. This error occurs consistently and prevents us from successfully completing the manifest build process.

+ set -o pipefail
++ pwd
+ PATH=/kube-prometheus/tmp/bin:/go/bin:/usr/local/go/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+ rm -rf manifests
+ mkdir -p manifests/setup
+ jsonnet -J vendor -m manifests example.jsonnet
+ xargs '-I{}' sh -c 'cat {} | gojsontoyaml > {}.yaml' -- '{}'
RUNTIME ERROR: Field does not exist: get
        vendor/github.com/grafana/grafonnet/gen/grafonnet-v10.3.0/custom/util/grid.libsonnet:119:25-32
        vendor/github.com/grafana/grafonnet/gen/grafonnet-v10.3.0/custom/util/grid.libsonnet:121:29-34
        <std>:774:24-47 thunk from <function <aux>>
        <std>:774:9-57  function <aux>
        <std>:775:5-28  function <anonymous>
        vendor/github.com/grafana/grafonnet/gen/grafonnet-v10.3.0/custom/util/grid.libsonnet:(93:5)-(172:6)
        vendor/github.com/kubernetes-monitoring/kubernetes-mixin/dashboards/apiserver.libsonnet:(320:11)-(345:10)       thunk from <object <anonymous>>
        vendor/github.com/grafana/grafonnet/gen/grafonnet-v10.3.0/custom/dashboard.libsonnet:17:30-35   thunk from <object <anonymous>>
        <std>:32:25-26  thunk from <function <anonymous>>
        <std>:32:16-27  function <anonymous>
        ...
        vendor/github.com/grafana/grafonnet/gen/grafonnet-v10.3.0/custom/util/panel.libsonnet:(21:7)-(51:8)
        vendor/github.com/grafana/grafonnet/gen/grafonnet-v10.3.0/custom/util/panel.libsonnet:52:5-19   function <anonymous>
        vendor/github.com/grafana/grafonnet/gen/grafonnet-v10.3.0/custom/dashboard.libsonnet:18:13-49   object <anonymous>
        <std>:932:43-47 thunk from <thunk from <thunk from <thunk from <thunk <lines> from <function <aux>>>>>>
        <std>:904:10-11 function <aux>
        <std>:932:39-78 thunk from <thunk from <thunk from <thunk <lines> from <function <aux>>>>>
        <std>:936:9-28  builtin function <join>
        <std>:937:5-23  function <anonymous>
        vendor/github.com/brancz/kubernetes-grafana/grafana/grafana.libsonnet:100:25-79 object <anonymous>
        During manifestation

How to reproduce it (as minimally and precisely as possible):

1. Clone main branch.
2. docker run --rm -v /Users/burda/Downloads/kube-prometheus-main:/kube-prometheus --workdir /kube-prometheus quay.io/coreos/jsonnet-ci jb update
3. docker run --rm -v /Users/burda/Downloads/kube-prometheus-main:/kube-prometheus --workdir /kube-prometheus quay.io/coreos/jsonnet-ci ./build.sh example.jsonnet

[Philip Gough]

@TBurda are you able to run make --always-make manifests on main?

Locally and in CI I see no issues generating manifests.
Could be a version mismatch since:

$  ./tmp/bin/jsonnet --version  
Jsonnet commandline interpreter (Go implementation) v0.20.0

while

$ docker run quay.io/coreos/jsonnet-ci jsonnet --version
Jsonnet commandline interpreter v0.15.0

[Tomáš Burda]

Hi, @philipgough

thanks for your help. After updating Jsonnet to v0.20.0 the build is working.