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main.go
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main.go
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package main
import (
"context"
"fmt"
"net/http"
"os"
"os/signal"
"syscall"
"time"
"github.com/jessevdk/go-flags"
"github.com/mxpv/podsync/pkg/feed"
"github.com/mxpv/podsync/pkg/model"
"github.com/mxpv/podsync/services/update"
"github.com/mxpv/podsync/services/web"
"github.com/robfig/cron/v3"
log "github.com/sirupsen/logrus"
"golang.org/x/sync/errgroup"
"gopkg.in/natefinch/lumberjack.v2"
"github.com/mxpv/podsync/pkg/db"
"github.com/mxpv/podsync/pkg/fs"
"github.com/mxpv/podsync/pkg/ytdl"
)
type Opts struct {
ConfigPath string `long:"config" short:"c" default:"config.toml" env:"PODSYNC_CONFIG_PATH"`
Headless bool `long:"headless"`
Debug bool `long:"debug"`
NoBanner bool `long:"no-banner"`
}
const banner = `
_______ _______ ______ _______ _ _______
( ____ )( ___ )( __ \ ( ____ \|\ /|( ( /|( ____ \
| ( )|| ( ) || ( \ )| ( \/( \ / )| \ ( || ( \/
| (____)|| | | || | ) || (_____ \ (_) / | \ | || |
| _____)| | | || | | |(_____ ) \ / | (\ \) || |
| ( | | | || | ) | ) | ) ( | | \ || |
| ) | (___) || (__/ )/\____) | | | | ) \ || (____/\
|/ (_______)(______/ \_______) \_/ |/ )_)(_______/
`
var (
version = "dev"
commit = "none"
date = "unknown"
arch = ""
)
func main() {
log.SetFormatter(&log.TextFormatter{
TimestampFormat: time.RFC3339,
FullTimestamp: true,
})
stop := make(chan os.Signal, 1)
signal.Notify(stop, syscall.SIGINT, syscall.SIGTERM)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
// Parse args
opts := Opts{}
_, err := flags.Parse(&opts)
if err != nil {
log.WithError(err).Fatal("failed to parse command line arguments")
}
if opts.Debug {
log.SetLevel(log.DebugLevel)
}
if !opts.NoBanner {
log.Info(banner)
}
log.WithFields(log.Fields{
"version": version,
"commit": commit,
"date": date,
"arch": arch,
}).Info("running podsync")
// Load TOML file
log.Debugf("loading configuration %q", opts.ConfigPath)
cfg, err := LoadConfig(opts.ConfigPath)
if err != nil {
log.WithError(err).Fatal("failed to load configuration file")
}
if cfg.Log.Filename != "" {
log.Infof("Using log file: %s", cfg.Log.Filename)
log.SetOutput(&lumberjack.Logger{
Filename: cfg.Log.Filename,
MaxSize: cfg.Log.MaxSize,
MaxBackups: cfg.Log.MaxBackups,
MaxAge: cfg.Log.MaxAge,
Compress: cfg.Log.Compress,
})
// Optionally enable debug mode from config.toml
if cfg.Log.Debug {
log.SetLevel(log.DebugLevel)
}
}
downloader, err := ytdl.New(ctx, cfg.Downloader)
if err != nil {
log.WithError(err).Fatal("youtube-dl error")
}
database, err := db.NewBadger(&cfg.Database)
if err != nil {
log.WithError(err).Fatal("failed to open database")
}
defer func() {
if err := database.Close(); err != nil {
log.WithError(err).Error("failed to close database")
}
}()
var storage fs.Storage
switch cfg.Storage.Type {
case "local":
storage, err = fs.NewLocal(cfg.Storage.Local.DataDir)
case "s3":
storage, err = fs.NewS3(cfg.Storage.S3)
default:
log.Fatalf("unknown storage type: %s", cfg.Storage.Type)
}
if err != nil {
log.WithError(err).Fatal("failed to open storage")
}
// Run updater thread
log.Debug("creating key providers")
keys := map[model.Provider]feed.KeyProvider{}
for name, list := range cfg.Tokens {
provider, err := feed.NewKeyProvider(list)
if err != nil {
log.WithError(err).Fatalf("failed to create key provider for %q", name)
}
keys[name] = provider
}
log.Debug("creating update manager")
manager, err := update.NewUpdater(cfg.Feeds, keys, cfg.Server.Hostname, downloader, database, storage)
if err != nil {
log.WithError(err).Fatal("failed to create updater")
}
// In Headless mode, do one round of feed updates and quit
if opts.Headless {
for _, _feed := range cfg.Feeds {
if err := manager.Update(ctx, _feed); err != nil {
log.WithError(err).Errorf("failed to update feed: %s", _feed.URL)
}
}
return
}
// Queue of feeds to update
updates := make(chan *feed.Config, 16)
defer close(updates)
group, ctx := errgroup.WithContext(ctx)
defer func() {
if err := group.Wait(); err != nil && (err != context.Canceled && err != http.ErrServerClosed) {
log.WithError(err).Error("wait error")
}
log.Info("gracefully stopped")
}()
// Create Cron
c := cron.New(cron.WithChain(cron.SkipIfStillRunning(cron.DiscardLogger)))
m := make(map[string]cron.EntryID)
// Run updates listener
group.Go(func() error {
for {
select {
case _feed := <-updates:
if err := manager.Update(ctx, _feed); err != nil {
log.WithError(err).Errorf("failed to update feed: %s", _feed.URL)
} else {
log.Infof("next update of %s: %s", _feed.ID, c.Entry(m[_feed.ID]).Next)
}
case <-ctx.Done():
return ctx.Err()
}
}
})
// Run cron scheduler
group.Go(func() error {
var cronID cron.EntryID
for _, _feed := range cfg.Feeds {
if _feed.CronSchedule == "" {
_feed.CronSchedule = fmt.Sprintf("@every %s", _feed.UpdatePeriod.String())
}
cronFeed := _feed
if cronID, err = c.AddFunc(cronFeed.CronSchedule, func() {
log.Debugf("adding %q to update queue", cronFeed.ID)
updates <- cronFeed
}); err != nil {
log.WithError(err).Fatalf("can't create cron task for feed: %s", cronFeed.ID)
}
m[cronFeed.ID] = cronID
log.Debugf("-> %s (update '%s')", cronFeed.ID, cronFeed.CronSchedule)
// Perform initial update after CLI restart
updates <- cronFeed
}
c.Start()
for {
<-ctx.Done()
log.Info("shutting down cron")
c.Stop()
return ctx.Err()
}
})
if cfg.Storage.Type == "s3" {
return // S3 content is hosted externally
}
// Run web server
srv := web.New(cfg.Server, storage)
group.Go(func() error {
log.Infof("running listener at %s", srv.Addr)
if cfg.Server.TLS {
return srv.ListenAndServeTLS(cfg.Server.CertificatePath, cfg.Server.KeyFilePath)
} else {
return srv.ListenAndServe()
}
})
group.Go(func() error {
// Shutdown web server
defer func() {
ctxShutDown, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer func() {
cancel()
}()
log.Info("shutting down web server")
if err := srv.Shutdown(ctxShutDown); err != nil {
log.WithError(err).Error("server shutdown failed")
}
}()
for {
select {
case <-ctx.Done():
return ctx.Err()
case <-stop:
cancel()
return nil
}
}
})
}