/
main.go
398 lines (358 loc) · 9.71 KB
/
main.go
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package main
import (
"context"
"flag"
"fmt"
"log"
"os"
"os/exec"
"strings"
"sync"
"syscall"
"time"
"github.com/blang/semver"
"github.com/brimstone/github-mirror/pkg/version"
"github.com/fsnotify/fsnotify"
git "github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/transport/http"
"github.com/google/go-github/github"
"github.com/rhysd/go-github-selfupdate/selfupdate"
"github.com/spf13/pflag"
"github.com/spf13/viper"
"golang.org/x/oauth2"
)
type HashRefs map[plumbing.ReferenceName]plumbing.Hash
type ChangeType uint8
const (
Added = ChangeType(iota)
Removed
Changed
)
type HashRefsDiff map[plumbing.ReferenceName]ChangeType
var basePath = ""
func openRepo(logger *log.Logger, repoName string) (repo *git.Repository, err error) {
repo, err = git.PlainOpen(basePath + "/" + repoName)
if err == nil {
return
}
defer profile(logger, 2, time.Now(), " Cloned %s", repoName)
opt := &git.CloneOptions{
URL: "https://github.com/" + repoName,
NoCheckout: true,
Auth: &http.BasicAuth{
Username: viper.GetString("username"),
Password: viper.GetString("token"),
},
}
if viper.GetInt("loglevel") >= 2 {
opt.Progress = os.Stdout
}
repo, err = git.PlainClone(basePath+"/"+repoName, false, opt)
if err != nil {
return
}
match := findMatch(repoName, viper.GetStringMapString("added"))
err = executeCmd(repoName, plumbing.ReferenceName(""), match)
if err != nil {
logit(logger, 0, "Error running command %s, %s\n", match, err)
}
return
}
func getHashRefs(repo *git.Repository) (m HashRefs, err error) {
m = make(HashRefs)
refs, _ := repo.References()
refs.ForEach(func(ref *plumbing.Reference) error {
m[ref.Name()] = ref.Hash()
return nil
})
return
}
func fetchRemotes(repo *git.Repository) (err error) {
remotes, _ := repo.Remotes()
for _, remote := range remotes {
opt := &git.FetchOptions{
Auth: &http.BasicAuth{
Username: viper.GetString("username"),
Password: viper.GetString("token"),
},
Tags: git.AllTags,
}
if viper.GetInt("loglevel") >= 2 {
opt.Progress = os.Stdout
}
err = remote.Fetch(opt)
if err == git.NoErrAlreadyUpToDate {
err = nil
}
if err != nil {
return
}
}
return
}
func diffHashRefs(before HashRefs, after HashRefs) (d HashRefsDiff, err error) {
d = make(HashRefsDiff)
for k, v := range before {
if v != after[k] {
d[k] = Changed
}
delete(before, k)
delete(after, k)
}
for k := range after {
d[k] = Added
}
for k := range before {
d[k] = Removed
}
return
}
func errExit(logger *log.Logger, err error, msg string) {
if err != nil {
fmt.Fprintf(os.Stderr, msg, err)
os.Exit(1)
}
}
func updateRepo(repoName string) {
logger := log.New(os.Stderr, "["+repoName+"] ", log.LstdFlags)
logit(logger, 2, "Starting %s\n", repoName)
repo, err := openRepo(logger, repoName)
if err != nil {
if err.Error() == "remote repository is empty" {
return
}
logger.Printf("Error opening repo: %s\n", err)
return
}
before, err := getHashRefs(repo)
errExit(logger, err, "Error getting ref hashes: %s\n")
err = fetchRemotes(repo)
if err != nil {
// Hide empty repo errors
if err.Error() == "remote repository is empty" {
logit(logger, 1, "Error fetching repo: %s\n", err)
return
}
if err.Error() == "reference has changed concurrently" { // TODO: try a few times and don't just ignore this
return
}
logit(logger, 0, "Error fetching repo: %s\n", err)
return
}
after, err := getHashRefs(repo)
errExit(logger, err, "Error getting ref hashes: %s\n")
d, err := diffHashRefs(before, after)
errExit(logger, err, "Error getting differences of hashrefs: %s\n")
for k, v := range d {
match := ""
switch v {
case Changed:
logit(logger, 1, "%s Ref %s changed\n", repoName, k)
match = findMatch(repoName, viper.GetStringMapString("changed"))
case Added:
logit(logger, 1, "%s Ref %s added\n", repoName, k)
match = findMatch(repoName, viper.GetStringMapString("added"))
case Removed:
logit(logger, 1, "%s Ref %s removed\n", repoName, k)
match = findMatch(repoName, viper.GetStringMapString("removed"))
}
if match == "" {
continue
}
err := executeCmd(repoName, k, match)
if err != nil {
logit(logger, 0, "Error running command %s, %s\n", match, err)
}
}
}
func executeCmd(repoName string, branchName plumbing.ReferenceName, command string) (err error) {
cmd := exec.Command(command)
branch := string(branchName)
branch = strings.TrimPrefix(branch, "refs/remotes/")
branch = strings.TrimPrefix(branch, "refs/")
cmd.Env = append(os.Environ(),
"REPO="+repoName,
"BRANCH="+string(branchName),
)
err = cmd.Run()
return
}
func profile(logger *log.Logger, level int, start time.Time, format string, args ...interface{}) {
var b []interface{}
b = append(b, time.Now().Sub(start))
b = append(b, args...)
logit(logger, level, "Duration: %s"+format+"\n", b...)
}
func getSelfRepos(client *github.Client) (allRepos []string, err error) {
opt := &github.RepositoryListOptions{
ListOptions: github.ListOptions{PerPage: 500},
}
var repos []*github.Repository
var resp *github.Response
for {
repos, resp, err = client.Repositories.List(context.Background(), "", opt)
if err != nil {
return
}
for _, repo := range repos {
allRepos = append(allRepos, *repo.Owner.Login+"/"+*repo.Name)
}
if resp.NextPage == 0 {
break
}
opt.Page = resp.NextPage
}
return
}
func getStarredRepos(client *github.Client) (allRepos []string, err error) {
opt := &github.ActivityListStarredOptions{
ListOptions: github.ListOptions{PerPage: 500},
}
var repos []*github.StarredRepository
var resp *github.Response
for {
repos, resp, err = client.Activity.ListStarred(context.Background(), "", opt)
if err != nil {
return
}
for _, repo := range repos {
if repo.Repository.Owner == nil {
//fmt.Println("Owner is nil: " + *repo.Repository.URL)
continue
}
allRepos = append(allRepos, *repo.Repository.Owner.Login+"/"+*repo.Repository.Name)
}
if resp.NextPage == 0 {
break
}
opt.Page = resp.NextPage
}
return
}
func logit(logger *log.Logger, level int, format string, args ...interface{}) {
if viper.GetInt("loglevel") >= level {
logger.Printf(format, args...)
}
}
func findMatch(needle string, haystack map[string]string) (result string) {
matchLength := -1
for k, v := range haystack {
if strings.HasPrefix(needle, k) && len(k) > matchLength {
result = v
}
}
return
}
func main() {
flag.String("token", "", "github token")
flag.Int("loglevel", 1, "log level, 0 is silent, 3 is verbose")
flag.Int("workers", 5, "number of workers")
flag.Bool("auto-upgrade", false, "automatically upgrade if a new version is available")
// setup configs
viper.SetConfigName("config")
viper.AddConfigPath("/")
viper.AddConfigPath("$HOME/.github-mirror")
viper.AddConfigPath(".")
err := viper.ReadInConfig()
logger := log.New(os.Stderr, "[main] ", log.LstdFlags)
if err != nil {
logit(logger, 0, "Error reading config: %s\n", err)
}
viper.WatchConfig()
viper.OnConfigChange(func(e fsnotify.Event) {
logit(logger, 2, "Config file changed:", e.Name)
})
viper.AutomaticEnv()
pflag.CommandLine.AddGoFlagSet(flag.CommandLine)
pflag.Parse()
viper.BindPFlags(pflag.CommandLine)
// Figure out the current version
v := semver.MustParse(version.Version)
if viper.GetBool("auto-upgrade") {
// Check for updates
pubkey, err := version.PublicKey()
if err != nil {
logit(logger, 0, "Error occurred while extracting public key:", err)
return
}
up, err := selfupdate.NewUpdater(selfupdate.Config{
Validator: &selfupdate.ECDSAValidator{
PublicKey: pubkey,
},
Filters: []string{
version.Binary,
},
})
latest, err := up.UpdateSelf(v, "brimstone/github-mirror")
if err != nil {
logit(logger, 0, "Binary update failed:", err)
return
}
if latest.Version.Equals(v) {
// latest version is the same as current version. It means current binary is up to date.
logit(logger, 0, "Current binary is the latest version", v)
} else {
logit(logger, 1, fmt.Sprintf("Successfully updated to version %s", latest.Version))
me, _ := os.Executable()
syscall.Exec(me, os.Args, os.Environ())
}
} else {
// Check for updates
latest, found, err := selfupdate.DetectLatest("brimstone/github-mirror")
if err != nil {
logit(logger, 0, "Error occurred while detecting version:", err)
}
if found && latest.Version.GT(v) {
logit(logger, 0, "New version available")
}
}
if viper.GetString("token") == "" {
fmt.Fprintf(os.Stderr, "Token must be set")
os.Exit(1)
}
basePath = viper.GetString("basepath")
ts := oauth2.StaticTokenSource(
&oauth2.Token{AccessToken: viper.GetString("token")},
)
tc := oauth2.NewClient(context.Background(), ts)
client := github.NewClient(tc)
defer profile(logger, 1, time.Now(), "")
logit(logger, 2, "Getting self repos\n")
repoMap := make(map[string]bool)
selfRepos, err := getSelfRepos(client)
errExit(logger, err, "Unable to get public repos: %s\n")
for _, repo := range selfRepos {
logit(logger, 3, "Repo: %s\n", repo)
repoMap[repo] = true
}
logit(logger, 2, "Getting starred repos\n")
starredRepos, err := getStarredRepos(client)
errExit(logger, err, "Unable to get starred repos: %s\n")
for _, repo := range starredRepos {
repoMap[repo] = true
}
logit(logger, 2, "Self Repos: %d, Starred Repos: %d", len(selfRepos), len(starredRepos))
repoChan := make(chan string)
var wg sync.WaitGroup
for i := 0; i < viper.GetInt("workers"); i++ {
go func() {
wg.Add(1)
defer wg.Done()
for {
repo, ok := <-repoChan
if !ok {
break
}
updateRepo(repo)
}
}()
}
for repo := range repoMap {
logit(logger, 2, "Adding %s\n", repo)
repoChan <- repo
}
close(repoChan)
logit(logger, 2, "Waiting for everything to finish\n")
wg.Wait()
}