go-template-bf-interpreter

Brainf*ck interpreter written by go-template (not Golang!)

Description

Go-template is turing-complete! From now on, your cubectl works as a bf interpreter!

Requirements

• k8s construction tool (kind for example)
• kubectl

Usage

# make k8s cluster (kind for example)
$ kind create cluster
$ kubectl get nodes
NAME                 STATUS   ROLES    AGE    VERSION
kind-control-plane   Ready    master   3m5s   v1.16.3

# create a pod, which includes bf source code in its annotations
$ kubectl create -f hello.yaml
pod/bf-source-pod created
$ kubectl get pods
NAME            READY   STATUS    RESTARTS   AGE
bf-source-pod   0/1     Pending   0          12s

# run bf interpreter!
$ kubectl get pods -o go-template-file=bf-interpreter.tpl
Hello World!

When you would like to finish (or try another source code), just delete the pod.

# when you finished to play with it...
$ kubectl delete pod bf-source-pod
pod "bf-source-pod" deleted
$ kubectl get pods
No resources found in default namespace.

How it works

This interpreter uses k8s output formatted by go-template. BF source code is written in pod manifest file (hello.yaml for example). The code is evaluated when cubectl refers the pod's info and formats it by bf-interpreter.tpl.

create new pods with your own bf source code

Copy bf-source-template.yaml and write your code in metadata.annotations.src.

NOTE: Be careful of indentations! YAML is indent-sensitive.