/
log.go
213 lines (167 loc) · 4.16 KB
/
log.go
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package log
import (
"bufio"
"bytes"
"context"
"fmt"
"io"
"os/exec"
"regexp"
"strings"
"github.com/common-nighthawk/go-figure"
"github.com/docker/docker/api/types"
"github.com/docker/docker/client"
"github.com/bartosian/sui_helpers/suimon/cmd/checker/enums"
)
type Logger struct{}
func NewLogger() Logger {
return Logger{}
}
func (logger *Logger) Info(messages ...any) {
colorPrint(enums.ColorGreen, messages)
}
func (logger *Logger) Warn(messages ...any) {
colorPrint(enums.ColorYellow, messages)
}
func (logger *Logger) Error(messages ...any) {
colorPrint(enums.ColorRed, messages)
}
func colorPrint(color enums.Color, messages ...any) {
fmt.Println(color, messages, enums.ColorReset)
}
func (logger *Logger) StreamFromService(serviceName string, stream chan string) error {
var (
cmdUnitLogs = "sudo journalctl -f -u %s -o cat"
stdout io.ReadCloser
cmd *exec.Cmd
err error
)
if !serviceExists(serviceName) {
return fmt.Errorf("service %s not found", serviceName)
}
cmd = exec.Command("bash", "-c", fmt.Sprintf(cmdUnitLogs, serviceName))
if stdout, err = cmd.StdoutPipe(); err != nil {
return err
}
if err = cmd.Start(); err != nil {
return err
}
scanner := bufio.NewScanner(stdout)
for scanner.Scan() {
select {
case stream <- scanner.Text():
case <-stream:
break
}
}
if err = cmd.Wait(); err != nil {
return err
}
return nil
}
func (logger *Logger) StreamFromContainer(imageName string, stream chan string) error {
var (
cli *client.Client
containers []types.Container
err error
)
if cli, err = client.NewClientWithOpts(client.FromEnv); err != nil {
return err
}
if containers, err = cli.ContainerList(context.Background(), types.ContainerListOptions{}); err != nil {
return err
}
for _, container := range containers {
imageID := container.ImageID
imageInspect, _, err := cli.ImageInspectWithRaw(context.Background(), imageID)
if err != nil {
return err
}
if strings.Contains(imageInspect.RepoTags[0], imageName) && container.State == "running" {
var logs io.ReadCloser
if logs, err = cli.ContainerLogs(context.Background(), container.ID, types.ContainerLogsOptions{ShowStdout: true, ShowStderr: true, Follow: true}); err != nil {
return err
}
defer logs.Close()
scanner := bufio.NewScanner(logs)
for scanner.Scan() {
select {
case stream <- scanner.Text():
case <-stream:
break
}
}
if err != nil && err.Error() != "EOF" {
return err
}
break
}
}
return fmt.Errorf("container with the image %s not found", imageName)
}
func (logger *Logger) StreamFromScreen(sessionName string, stream chan string) error {
var (
stdout io.ReadCloser
cmdAttach *exec.Cmd
cmdDetach *exec.Cmd
err error
)
// attach screen for the logs piping
cmdAttach = exec.Command("script", "-q", "-c", "screen -r "+sessionName, "/dev/null")
if stdout, err = cmdAttach.StdoutPipe(); err != nil {
return err
}
if err = cmdAttach.Start(); err != nil {
return err
}
scanner := bufio.NewScanner(stdout)
for scanner.Scan() {
select {
case stream <- scanner.Text():
case <-stream:
break
}
}
// detach screen back
cmdDetach = exec.Command("script", "-q", "-c", "screen -d "+sessionName, "/dev/null")
if err = cmdDetach.Run(); err != nil {
return err
}
if err = cmdAttach.Wait(); err != nil {
return err
}
return nil
}
func RemoveNonPrintableChars(str string) string {
reg := regexp.MustCompile("[^[:print:]\n]")
return reg.ReplaceAllString(str, "")
}
func serviceExists(name string) bool {
out, err := exec.Command("systemctl", "is-active", name).Output()
if err != nil {
return false
}
status := strings.TrimSpace(string(out))
if status == "active" {
return true
}
return false
}
func getPID(command string) (string, error) {
var (
cmd = exec.Command("pgrep", command)
output bytes.Buffer
err error
)
cmd.Stdout = &output
if err = cmd.Run(); err != nil {
return "", err
}
return output.String(), nil
}
func PrintLogo(text string, fontName string, color string) {
logo := figure.NewColorFigure(text, fontName, color, true)
fmt.Print("\n\n")
logo.Print()
fmt.Print("\n\n")
}