Question on replacing value(s) single and multiple occurrences

[ghost]

Hello,

I was pointed out by someone that this tool was better to replace (multiple) values in a yaml file than using sed. I have tried some examples, but it is not clear to me how to replace certain values in https://raw.githubusercontent.com/c4po/harbor_exporter/master/kubernetes/harbor-exporter.yaml

I need to replace multiple occurrences in this file, however, I am only able to select 1. How do I add a line with the namespace value?

metadata:
  name: harbor-exporter

to

metadata:
  name: harbor-exporter
  namespace: test

Next to this, I also need to replace the value of "- harbor #......" to test and keep the remaining lines and this is failing with dasel put string -f he.yaml -s "spec.namespaceSelector.matchNames" "test"

  namespaceSelector:
    matchNames:
    - harbor # change to the namespace where you deployed Harbor

Thanks!

[TomWright]

Thanks for your interest in dasel!

After taking a look at your example file I can tell you that dasel doesn't currently support multiple yaml documents in the same file due to limitations in the yaml package we use: https://github.com/go-yaml/yaml#compatibility

If this is a recurring issue I'll look at migrating to a new yaml package.

If we assume you have split the documents out into service.yaml, deployment.yaml and servicemon.yaml then...

How do I add a line with the namespace value?

dasel put string -f service.yaml '.metadata.namespace' 'test'
dasel put string -f deployment.yaml '.metadata.namespace' 'test'
dasel put string -f servicemon.yaml '.metadata.namespace' 'test'

Change the namespaceSelector
Your example hasn't worked because matchNames is actually a list of strings.

dasel put string -f servicemon.yaml '.spec.namespaceSelector.matchNames[0]' 'test'

Notes
It's still very early on for dasel and there's going to be cases (much like this) that aren't ideal. I'm working hard to document all of these cases and working to create the best solution.

This does highlight the potential use of multiple files/multiple documents.

[ghost]

Thanks, in the Kubernetes world a lot of files contains multiple yaml documents, so one command to change every occurence of something is very welcome!

[TomWright]

Hi @ws-way,
Multi-document YAML files are now supported as of v1.2.0.

[ghost]

Hi @TomWright ,

Thanks for adding this, I have read the readme.md and tested it, but it is unclear how I can change all values in an yaml file without knowing how much yaml documents are in there. Do you have an example?

[TomWright]

Dasel is really only designed for use-cases where you know the structure of the files.

This sounds like you're after a search + multi-selector feature.

A feature request for multi-selector is here: #15

I have thought about adding search functionality but haven't created a feature request for it yet.

[ghost]

Hello @TomWright ,

Ok, thanks for the answer!

[TomWright]

As of v1.4.0 multi-select is supported.

The following will set the metadata name in all yaml documents to test:

dasel put string -m -f harbor-exporter.yaml '.[*].metadata.name' 'test'

[ghost]

Hi @TomWright ,

Thanks, I will take a look at this later this week or next week.

[ghost]

Hello @TomWright ,

The multiline replace is working fine, thanks.