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Use kubectl to get k8s context and namespace (#312)

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Add a way to get the current kubernetes context and default namespace in use using `kubectl`
This commit is contained in:
Caio Cezar Zapater de Souza
2019-09-12 12:11:36 -03:00
committed by Caio Gondim
parent cf54c3b9bd
commit 6a7b1ab36f
2 changed files with 25 additions and 9 deletions
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@@ -193,9 +193,15 @@ NOTE: You do not need to specify *end* segment - it will be added automatically.
|`BULLETTRAIN_KCTX_BG`|`yellow`|Background color
|`BULLETTRAIN_KCTX_FG`|`white`|Foreground color
|`BULLETTRAIN_KCTX_PREFIX`|`⎈`|[Kubernetes](https://unicode-table.com/de/2388/) prefix of the segment
|`BULLETTRAIN_KCTX_KCONFIG`|`<MUST_BE_SET>`|Location of kube config file (e.g. /Users/Hugo/.kube/config)
|`BULLETTRAIN_KCTX_KUBECTL`|`true`|If `false` disable `kubectl` usage
|`BULLETTRAIN_KCTX_NAMESPACE`|`true`|If `false` will not show the default namespace. Namespace is only visible if `kubectl` is installed
|`BULLETTRAIN_KCTX_KCONFIG`|`${HOME}/.kube/config`|Location of kube config file (e.g. /Users/Hugo/.kube/config)
The prompt will first check if `BULLETTRAIN_KCTX_KUBECTL=true` and `kubectl` is installed than it will use `kubectl config view --minify` to determine the context and default namespace in use.
If `BULLETTRAIN_KCTX_KUBECTL=false` or `kubectl` is not installed, `BULLETTRAIN_KCTX_KCONFIG` will be parsed to get the current context.
The usage of `kubectl` allow the prompt to get the default namespace even if you are using multiple kube config files (e.g. KUBECONFIG=~/.kube/config:path-to-config1:path-to-config2)
`BULLETTRAIN_KCTX_KCONFIG` must be set, e.g. in .zshrc. There can be no default value and `~/` can not be reliably interpreted. The prompt will also do a sanity check whether `kubectl` is installed. If either condition fails, the prompt segment will not be drawn at all.
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