105 lines
1.9 KiB
Go
105 lines
1.9 KiB
Go
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package main
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import (
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"bufio"
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"errors"
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"fmt"
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"log"
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"net/http"
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"os"
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"os/exec"
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"strings"
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)
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func main() {
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if err := run(); err != nil {
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log.Println(err)
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os.Exit(1)
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}
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}
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const baseURL = "https://archive.raspberrypi.org/debian/"
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const packagesURL = baseURL + "dists/buster/main/binary-armhf/Packages"
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func run() error {
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log.Println("checking:", packagesURL)
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kernelPrefix := "Filename: pool/main/r/raspberrypi-firmware/raspberrypi-kernel_"
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version := ""
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versionPrefix := "Version: "
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err := scanOnlineTextFile(packagesURL, func(s string) bool {
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if strings.HasPrefix(s, versionPrefix) {
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version = s[len(versionPrefix):]
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}
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if strings.HasPrefix(s, kernelPrefix) {
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return true
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}
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return false
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})
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if version == "" {
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if err != nil {
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return err
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}
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return errors.New("could not find kernel version in package list")
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}
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before, after, found := strings.Cut(version, ":")
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if !found {
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after = before
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}
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tagName, _, _ := strings.Cut(after, "~")
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log.Println("latest version:", tagName)
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tags, err := gitTags("linux-sources")
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if err != nil {
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return err
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}
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for _, tag := range tags {
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if tagName == tag {
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log.Println("already up to date")
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return nil
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}
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}
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log.Println("outdated tag", tags)
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fmt.Println(tagName)
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return nil
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}
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func gitTags(folder string) ([]string, error) {
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current, err := os.Getwd()
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if err != nil {
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return nil, err
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}
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defer os.Chdir(current)
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err = os.Chdir(folder)
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if err != nil {
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return nil, err
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}
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cmd := exec.Command("git", "tag", "--points-at", "HEAD")
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cmd.Stderr = os.Stderr
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out, err := cmd.Output()
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if err != nil {
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return nil, err
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}
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return strings.Split(strings.TrimSpace(string(out)), "\n"), nil
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}
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func scanOnlineTextFile(url string, stopScanning func(string) bool) error {
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resp, err := http.Get(url)
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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scanner := bufio.NewScanner(resp.Body)
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for scanner.Scan() {
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if stopScanning(scanner.Text()) {
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break
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}
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}
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return scanner.Err()
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}
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