go - 带 Helm 的尺码表

Question

一个简单的问题，是否可以通过 helm 和 sprig 函数获取尺寸列表？

我的 list :

list:
 - a
 - b
 - c

我试过这样的:

{{ .Values.list | len }}
{{ .Values.list | size }}
{{ .Values.list | length }}

Answer 1

查看此 How to compare the length of a list in html/template in golang? .

While we talk about the “Helm template language” as if it is Helm-specific, it is actually a combination of the Go template language, some extra functions, and a variety of wrappers to expose certain objects to the templates. Many resources on Go templates may be helpful as you learn about templating.

引用:https://helm.sh/docs/chart_template_guide/#template-functions-and-pipelines

因此您可以使用 go-template(text/template 包)中的 len 函数。

示例:

values.yaml 内容:

list:
  - a
  - b
  - c

template/list.yaml 内容:

kind: List
spec:
  len: {{ len .Values.list }}
  items:
{{- range $item := .Values.list }}
    - {{ $item }}
{{- end }}