charts/clustertool/pkg/helper/runcmd.go

package helper

import (
	"bytes"
	"io"
	"os"
	"os/exec"
	"strings"
)

type filteredWriter struct {
	writer  io.Writer
	filters []string
}

func (fw *filteredWriter) Write(p []byte) (n int, err error) {
	lines := strings.Split(string(p), "\n")
	var filteredLines []string
	for _, line := range lines {
		shouldFilter := false
		for _, filter := range fw.filters {
			if strings.Contains(line, filter) {
				shouldFilter = true
				break
			}
		}
		if !shouldFilter {
			filteredLines = append(filteredLines, line)
		}
	}
	return fw.writer.Write([]byte(strings.Join(filteredLines, "\n")))
}

func RunCommand(commandSlice []string, silent bool) (string, error) {
	filters := []string{"certificate signed by unknown authority", "bootstrap is not available yet"}
	cmd := exec.Command(commandSlice[0], commandSlice[1:]...)

	var stdoutBuf, stderrBuf bytes.Buffer
	if silent {
		cmd.Stdout = &stdoutBuf
		cmd.Stderr = &stderrBuf
	} else {
		cmd.Stdout = io.MultiWriter(&stdoutBuf, &filteredWriter{writer: os.Stdout, filters: filters})
		cmd.Stderr = io.MultiWriter(&stderrBuf, &filteredWriter{writer: os.Stderr, filters: filters})
	}

	err := cmd.Run()
	if err != nil {
		return stdoutBuf.String() + stderrBuf.String(), err
	}

	return stdoutBuf.String() + stderrBuf.String(), nil
}