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build.go
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build.go
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package images
import (
"bytes"
"fmt"
"github.com/go-co-op/gocron"
"github.com/z13z/Kiosks/master-server/db/images"
"github.com/z13z/Kiosks/master-server/images/builder"
"github.com/z13z/Kiosks/master-server/images/worker"
"log"
"os"
"os/exec"
"strconv"
"strings"
"time"
)
const OutputFileName = "ubuntu-20.04.2-server-custom.iso"
const OutputFileDir = "build"
const KiosksImagesDirectory = "kiosk-image-result"
const KiosksImagesScriptsDirectoryName = "kiosk-image"
const mustBuildImageState = "waiting"
const imageDoneState = "done"
const imageBuildingState = "building"
const imageFailedState = "failed"
const batchSize = 2
const jobIntervalMins = 10 * batchSize
const buildOutputFileName = "output.txt"
const buildErrorFileName = "error.txt"
func BuildImagesJob() {
err := downloadUbuntuImage()
if err != nil {
log.Fatal(err)
}
imagesBean := images.NewBean()
scheduler := gocron.NewScheduler(time.UTC)
_, err = scheduler.Every(jobIntervalMins).Minutes().Do(buildImagesJobRun, imagesBean)
if err != nil {
log.Fatal(err)
}
scheduler.StartAsync()
}
func downloadUbuntuImage() error {
err := builder.RestoreAsset(".", "kiosk-image/download_ubuntu_image")
_ = os.Chmod("kiosk-image", 0777)
_ = os.Chmod("kiosk-image/download_ubuntu_image", 0777)
if err != nil {
return err
}
// if command is not in pass call fails :)
e := exec.Command("./kiosk-image/download_ubuntu_image")
var outBuf, errBuf bytes.Buffer
e.Stdout = &outBuf
e.Stderr = &errBuf
err = e.Run()
errB := writeBufferToFile(&outBuf, buildOutputFileName)
if errB != nil {
log.Print("Error while writing buffer in: "+buildOutputFileName+": ", errB)
}
errB = writeBufferToFile(&errBuf, buildErrorFileName)
if errB != nil {
log.Print("Error while writing buffer in: "+buildErrorFileName+": ", errB)
}
return err
}
func exportKioskBuildScriptsInDir(directory string) error {
err := builder.RestoreAsset(directory, "kiosk-image/Makefile")
err = builder.RestoreAsset(directory, "kiosk-image/create_custom_image")
err = builder.RestoreAsset(directory, "kiosk-image/chroot_commands")
err = builder.RestoreAsset(directory, "kiosk-image/prepare_kiosk")
err = worker.RestoreAsset(directory, "kiosk-worker/common.py")
err = worker.RestoreAsset(directory, "kiosk-worker/alive.py")
err = worker.RestoreAsset(directory, "kiosk-worker/configs.py")
err = worker.RestoreAsset(directory, "kiosk-worker/controller.py")
err = worker.RestoreAsset(directory, "kiosk-worker/ip_provider.py")
err = worker.RestoreAsset(directory, "kiosk-worker/main.py")
return err
}
func buildImagesJobRun(imagesBean *images.Bean) {
imagesToBuild := imagesBean.GetImages(0, "", mustBuildImageState, 0, batchSize)
for _, image := range *imagesToBuild {
buildImage(&image, imagesBean)
}
}
func buildImage(image *images.ImageEntity, bean *images.Bean) {
log.Printf("Starging build of image (%s)", image.Name)
defer log.Printf("Finished build of image (%s)", image.Name)
if !setImageState(image, bean, imageBuildingState) {
return
}
err := runMakeIsoScript(image)
if err != nil {
if !setImageState(image, bean, imageFailedState) {
return
}
}
setImageState(image, bean, imageDoneState)
}
func setImageState(image *images.ImageEntity, bean *images.Bean, state string) bool {
image.State = state
err := bean.EditImage(image)
if err != nil {
log.Print("error occurred while setting image state to "+state+": ", err)
return false
}
return true
}
func runMakeIsoScript(image *images.ImageEntity) error {
err := createDirectoryAndLogFilesForKioskImage(image)
defer deleteImageBuildFiles(image.Name)
if err != nil {
return err
}
e := exec.Command("make")
e.Dir = KiosksImagesDirectory + "/" + image.Name + "/" + KiosksImagesScriptsDirectoryName
e.Env = append(os.Environ(),
"KIOSK_IMAGE_ID="+strconv.FormatInt(image.Id, 10),
"LOCAL_MACHINE="+strconv.FormatBool(image.LocalMachine),
"CUSTOM_SCRIPTS_TO_RUN="+strings.ReplaceAll(image.Script, "\n", " && "),
"KIOSK_APP_NAME="+image.Application)
imageDir := KiosksImagesDirectory + "/" + image.Name
var outBuf, errBuf bytes.Buffer
e.Stdout = &outBuf
e.Stderr = &errBuf
err = e.Run()
errB := writeBufferToFile(&outBuf, imageDir+"/"+buildOutputFileName)
if errB != nil {
log.Print("Error while writing buffer in: "+imageDir+"/"+buildOutputFileName+": ", errB)
}
errB = writeBufferToFile(&errBuf, imageDir+"/"+buildErrorFileName)
if errB != nil {
log.Print("Error while writing buffer in: "+imageDir+"/"+buildErrorFileName+": ", errB)
}
return err
}
func deleteImageBuildFiles(imageName string) {
imageDir := KiosksImagesDirectory + "/" + imageName
err := os.Remove(imageDir + "/kiosk-image/Makefile")
if err != nil {
log.Print(fmt.Sprintf("Error while deleting image build script (%s)", imageDir+"/kiosk-image/Makefile: "), err)
}
err = os.Remove(imageDir + "/kiosk-image/create_custom_image")
if err != nil {
log.Print(fmt.Sprintf("Error while deleting image build script (%s)", imageDir+"/kiosk-image/create_custom_image: "), err)
}
err = os.Remove(imageDir + "/kiosk-image/chroot_commands")
if err != nil {
log.Print(fmt.Sprintf("Error while deleting image build script (%s)", imageDir+"/kiosk-image/create_custom_image: "), err)
}
err = os.Remove(imageDir + "/kiosk-image/prepare_kiosk")
if err != nil {
log.Print(fmt.Sprintf("Error while deleting image build script (%s)", imageDir+"/kiosk-image/prepare_kiosk: "), err)
}
err = os.RemoveAll(imageDir + "/kiosk-worker")
if err != nil {
log.Print(fmt.Sprintf("Error while deleting image build directory (%s)", imageDir+"/kiosk-worker: "), err)
}
}
func writeBufferToFile(w *bytes.Buffer, fileName string) error {
f, err := os.Create(fileName)
if err != nil {
return err
}
defer func(f *os.File) {
_ = f.Close()
}(f)
_, err = f.Write(w.Bytes())
return err
}
// 1) mkdir for build directory and cd there.
// 2) mkdir for kiosk image directory (remove before if exists).
// 3) copy build scripts to kiosk image directory.
func createDirectoryAndLogFilesForKioskImage(image *images.ImageEntity) error {
imageDir := KiosksImagesDirectory + "/" + image.Name
err := os.Mkdir(KiosksImagesDirectory, 0755)
if err != nil && !os.IsExist(err) {
return err
}
err = os.RemoveAll(imageDir)
if err != nil && !os.IsNotExist(err) {
return err
}
err = os.Mkdir(imageDir, 0755)
if err != nil {
return err
}
return exportKioskBuildScriptsInDir(imageDir)
}