how to implement helm command "helm dependency update" with pyhelm

[fumanne]

some command like "helm dep update"
how to implement this function?

[fumanne]

@flaper87
hello falper87
from helm docs， We see 'Note: The dependencies: section of the Chart.yaml from Helm Classic has been completely removed.'
https://docs.helm.sh/developing_charts/
and your code is old....
https://github.com/flaper87/pyhelm/blob/master/pyhelm/chartbuilder.py#L201
so can you update it when you are free?

[yanivoliver]

pyhelm does not extract dependencies from Chart.yaml. You are (currently) required to build the chart object you pass to ChartBuilder to contain the dependency definitions in order for them to be used by the library.

[yanivoliver]

And regarding your first question, I'm not sure I understand.
Are you asking how to replicate the functionality of the helm dependency update command? If so, this is not implemented as part of pyhelm, but as pyhelm doesn't use the on-disk mirrors of the dependencies it doesn't affect it.

[fumanne]

@yanivoliver
yeah... I mean replicate the functionality of the helm dependency update command as part of pyhelm
Because I use ansible helm module, and find this module can not work the functionality of the helm dependency update command

[yanivoliver]

Gotcha. pyhelm does not replicate most of the client-side logic of Helm, including not implementing the functionality of the dependency update command.
Can you elaborate on your full use-case? What is your need of this functionality in pyhelm? If you install Charts using pyhelm you don't need this functionality, as we load the dependency straight from source instead of taking the .tgz version under Charts subdirectory.

[fumanne]

@yanivoliver OK...
here is my case:
A chart named kube-prometheus, it has requirements.yml and contains other chart.
the architecture looks like this:
kube-prometheus:
|__ charts/
|__ Chart.yml
|__ requirements.yml
|__ values.yml
|__ templates/
|__ prometheus/
|__ xx_exporters/
|__ yy_exporters/

In shell command: when to deploy this chart， need to use helm dep update command to generate some exporters.tgz in charts directory, then use helm install to deploy the whole chart.
but when I use pyhelm. It does not work.
if it is hard to implement this function, I need to separate this chart. thanks @yanivoliver

[yanivoliver]

Sorry for the (very very) late response. Is this still relevant?

[kammous]

@yanivoliver yes this issue is still relevant. It would be great to see this function implemented in PyHelm project. Otherwise, could you provide an implementation guide?
By the way, is there any relation with issue #52 ?

Thanks a lot.