initial version

README.md

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+# kubectls - one command to rule your all kubectl contexts
+
+Are you operating in multi-cluster environment? Are you tired of constantly switching your kubectl contexts to execute the same command in different clusters?
+Good news! `kubectls` is here to help you!
+
+`kubectl` takes one kubernetes context as an input and executes the command in this context.
+`kubectls` takes **a list of kubernetes context separated by comma** and simply executes the same command in each context!
+
+... and it's less than 70 lines of code!
+
+
+# Demo
+
+[![asciicast](https://asciinema.org/a/sM4ogGmfBnk0wBC31K5RK3n88.svg)](https://asciinema.org/a/sM4ogGmfBnk0wBC31K5RK3n88)
+
+# Commands not supported
+- exec
+- port-forward
+- attach
+- edit
+
+# Install
+Build it from source:
+
+    $ git clone 

go.mod

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+module kubectls

main.go

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+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+var Reset = "\033[0m"
+var Red = "\033[31m"
+var Green = "\033[32m"
+var Yellow = "\033[33m"
+var Blue = "\033[34m"
+var Purple = "\033[35m"
+var Cyan = "\033[36m"
+var Gray = "\033[37m"
+var White = "\033[97m"
+
+var Colors = []string{Red, Gray, Blue, Purple, Cyan, White, Green, Yellow}
+var NotSupportedSubCommands = map[string]struct{}{"edit": {}, "port-forward": {}, "attach": {}, "exec": {}}
+
+func main() {
+
+	var contextFlag string
+	flag.StringVar(&contextFlag, "context", "", "")
+	flag.Parse()
+	kubectlArgsLen := len(os.Args) - 2
+	kubectlArgs := make([]string, kubectlArgsLen)
+	k := 0
+	for _, arg := range os.Args[1:] {
+		if strings.HasPrefix(arg, "--context") {
+			continue
+		}
+		if _, notSupported := NotSupportedSubCommands[arg]; notSupported {
+			fmt.Printf("subcommand %s is currently not supported.\n", arg)
+			os.Exit(1)
+		}
+		kubectlArgs[k] = arg
+		k++
+	}
+
+	for i, k8sCtx := range strings.Split(contextFlag, ",") {
+		currentColor := Colors[i]
+		cmd := buildKubectlCommandForContext(k8sCtx, kubectlArgs)
+		fmt.Printf("%s---------------------------------------------------------------------------------------\n", currentColor)
+		output, err := cmd.CombinedOutput()
+		if err != nil {
+			fmt.Printf("got errors: %w", err)
+		}
+		fmt.Println(string(output), "\n---------------------------------------------------------------------------------------", Reset)
+	}
+	os.Exit(0)
+}
+
+func buildKubectlCommandForContext(k8sCtx string, kubectlArgs []string) *exec.Cmd {
+	kubectlCmdArgs := []string{"--context", k8sCtx}
+	kubectlCmdArgs = append(kubectlCmdArgs, kubectlArgs...)
+	cmd := exec.Command("kubectl", kubectlCmdArgs...)
+	cmd.Env = os.Environ()
+	return cmd
+}