hrfee/waybar-mpris
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overwrite previous content when sharing output

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this way /tmp/waybar-mpris.out won't get filled up.
This commit is contained in:
Harvey Tindall 2021-04-24 16:02:39 +01:00
parent 16465c44a2
commit c235dd60dd
Signed by: hrfee
GPG Key ID: BBC65952848FB1A2
4 changed files with 185 additions and 140 deletions
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5
go.mod
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@ -3,12 +3,9 @@ module git.hrfee.pw/hrfee/waybar-mpris
go 1.15
require (
github.com/fsnotify/fsnotify v1.4.9 // indirect
github.com/fsnotify/fsnotify v1.4.9
github.com/godbus/dbus/v5 v5.0.3
github.com/hpcloud/tail v1.0.0
github.com/hrfee/mpris2client v0.0.5
github.com/spf13/pflag v1.0.5
golang.org/x/sys v0.0.0-20210113181707-4bcb84eeeb78 // indirect
gopkg.in/fsnotify.v1 v1.4.7 // indirect
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
)

18
go.sum
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@ -2,28 +2,10 @@ github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWo
github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
github.com/godbus/dbus/v5 v5.0.3 h1:ZqHaoEF7TBzh4jzPmqVhE/5A1z9of6orkAe5uHoAeME=
github.com/godbus/dbus/v5 v5.0.3/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
github.com/hrfee/mpris2client v0.0.0-20210108004725-d2a36745cc4a h1:3H1awMdF3eJBCg0QPpDtNW+ujQPvUCuLsqlMRoODMA4=
github.com/hrfee/mpris2client v0.0.0-20210108004725-d2a36745cc4a/go.mod h1:tVpzzAlsljmQevNA4mJwUy1onUUiaQcRAa4gdl37okY=
github.com/hrfee/mpris2client v0.0.0-20210115213010-244c4cd6a569 h1:aCHzdXajnRUeaaW9FHzunrjGcRqmyFedwO0ODJRAdBk=
github.com/hrfee/mpris2client v0.0.0-20210115213010-244c4cd6a569/go.mod h1:tVpzzAlsljmQevNA4mJwUy1onUUiaQcRAa4gdl37okY=
github.com/hrfee/mpris2client v0.0.2 h1:AqsDoJCKyKjSGwVk3sJ5fjx+7M0tsSueZbVUIDxS1xI=
github.com/hrfee/mpris2client v0.0.2/go.mod h1:tVpzzAlsljmQevNA4mJwUy1onUUiaQcRAa4gdl37okY=
github.com/hrfee/mpris2client v0.0.4 h1:2WnCkTWGBr1eg3qHFjxDo7hIeCeQWh3jJ0hFJSts9Ks=
github.com/hrfee/mpris2client v0.0.4/go.mod h1:tVpzzAlsljmQevNA4mJwUy1onUUiaQcRAa4gdl37okY=
github.com/hrfee/mpris2client v0.0.5 h1:h3gcb8Q68i6SfcEgOxL9cXcGee9ekvxXltrUxGwRLDU=
github.com/hrfee/mpris2client v0.0.5/go.mod h1:tVpzzAlsljmQevNA4mJwUy1onUUiaQcRAa4gdl37okY=
github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200928205150-006507a75852 h1:sXxgOAXy8JwHhZnPuItAlUtwIlxrlEqi28mKhUR+zZY=
golang.org/x/sys v0.0.0-20200928205150-006507a75852/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20201116194326-cc9327a14d48 h1:AYCWBZhgIw6XobZ5CibNJr0Rc4ZofGGKvWa1vcx2IGk=
golang.org/x/sys v0.0.0-20201116194326-cc9327a14d48/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210113181707-4bcb84eeeb78 h1:nVuTkr9L6Bq62qpUqKo/RnZCFfzDBL0bYo6w9OJUqZY=
golang.org/x/sys v0.0.0-20210113181707-4bcb84eeeb78/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=

228
main.go
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@ -11,8 +11,8 @@ import (
"strings"
"time"
"github.com/fsnotify/fsnotify"
"github.com/godbus/dbus/v5"
"github.com/hpcloud/tail"
mpris2 "github.com/hrfee/mpris2client"
flag "github.com/spf13/pflag"
)
@ -37,6 +37,7 @@ var (
SHOW_POS = false
INTERPOLATE = false
REPLACE = false
isSharing = false
WRITER io.Writer = os.Stdout
)
@ -129,38 +130,17 @@ func (pl *players) Prev() { pl.mpris2.List[pl.mpris2.Current].Previous() }
func (pl *players) Toggle() { pl.mpris2.List[pl.mpris2.Current].Toggle() }
func main() {
logfile, err := os.OpenFile(LOGFILE, os.O_CREATE|os.O_APPEND|os.O_RDWR, 0666)
if err != nil {
log.Fatalf("Couldn't open %s for writing: %s", LOGFILE, err)
}
mw := io.MultiWriter(logfile, os.Stdout)
log.SetOutput(mw)
flag.StringVar(&PLAY, "play", PLAY, "Play symbol/text to use.")
flag.StringVar(&PAUSE, "pause", PAUSE, "Pause symbol/text to use.")
flag.StringVar(&SEP, "separator", SEP, "Separator string to use between artist, album, and title.")
flag.StringVar(&ORDER, "order", ORDER, "Element order.")
flag.BoolVar(&AUTOFOCUS, "autofocus", AUTOFOCUS, "Auto switch to currently playing music players.")
flag.BoolVar(&SHOW_POS, "position", SHOW_POS, "Show current position between brackets, e.g (04:50/05:00)")
flag.BoolVar(&INTERPOLATE, "interpolate", INTERPOLATE, "Interpolate track position (helpful for players that don't update regularly, e.g mpDris2)")
flag.BoolVar(&REPLACE, "replace", REPLACE, "replace existing waybar-mpris if found. When false, new instance will clone the original instances output.")
var command string
flag.StringVar(&command, "send", "", "send command to already runnning waybar-mpris instance. (options: "+strings.Join(COMMANDS, "/")+")")
flag.Parse()
os.Stderr = logfile
if command != "" {
func execCommand(cmd string) {
conn, err := net.Dial("unix", SOCK)
if err != nil {
log.Fatalln("Couldn't dial:", err)
}
_, err = conn.Write([]byte(command))
_, err = conn.Write([]byte(cmd))
if err != nil {
log.Fatalln("Couldn't send command")
}
fmt.Println("Sent.")
if command == "list" {
if cmd == "list" {
buf := make([]byte, 512)
nr, err := conn.Read(buf)
if err != nil {
@ -172,70 +152,72 @@ func main() {
}
os.Exit(0)
}
// fmt.Println("New array", players)
// Start command listener
if _, err := os.Stat(SOCK); err == nil {
if REPLACE {
fmt.Printf("Socket %s already exists, this could mean waybar-mpris is already running.\nStarting this instance will overwrite the file, possibly stopping other instances from accepting commands.\n", SOCK)
var input string
ignoreChoice := false
fmt.Printf("Continue? [y/n]: ")
go func() {
fmt.Scanln(&input)
if strings.Contains(input, "y") && !ignoreChoice {
os.Remove(SOCK)
}
}()
time.Sleep(5 * time.Second)
if input == "" {
fmt.Printf("\nRemoving due to lack of input.\n")
ignoreChoice = true
// os.Remove(SOCK)
}
} else if conn, err := net.Dial("unix", SOCK); err == nil {
// When waybar-mpris is already running, we attach to its output instead of launching a whole new instance.
func duplicateOutput(conn net.Conn) {
// Print to stderr to avoid errors from waybar
os.Stderr.WriteString("waybar-mpris is already running. This instance will clone its output.")
// Tell other instance to share output in OUTFILE
_, err := conn.Write([]byte("share"))
if err != nil {
log.Fatalln("Couldn't dial:", err)
}
_, err = conn.Write([]byte("share"))
if err != nil {
log.Fatalln("Couldn't send command")
log.Fatalf("Couldn't send command: %v", err)
}
buf := make([]byte, 512)
nr, err := conn.Read(buf)
if err != nil {
log.Fatalln("Couldn't read response.")
log.Fatalf("Couldn't read response: %v", err)
}
if string(buf[0:nr]) == "success" {
t, err := tail.TailFile(OUTFILE, tail.Config{
Follow: true,
MustExist: true,
Logger: tail.DiscardingLogger,
})
if err == nil {
for line := range t.Lines {
fmt.Println(line.Text)
}
}
}
} else {
os.Remove(SOCK)
os.Remove(OUTFILE)
}
}
conn, err := dbus.SessionBus()
if resp := string(buf[0:nr]); resp == "success" {
// t, err := tail.TailFile(OUTFILE, tail.Config{
// Follow: true,
// MustExist: true,
// Logger: tail.DiscardingLogger,
// })
// if err == nil {
// for line := range t.Lines {
// fmt.Println(line.Text)
// }
// }
f, err := os.Open(OUTFILE)
if err != nil {
log.Fatalln("Error connecting to DBus:", err)
log.Fatalf("Failed to open \"%s\": %v", OUTFILE, err)
}
players := &players{
mpris2: mpris2.NewMpris2(conn, INTERPOLATE, POLL, AUTOFOCUS),
watcher, err := fsnotify.NewWatcher()
if err != nil {
log.Fatalf("Failed to start watcher: %v", err)
}
players.mpris2.Reload()
players.mpris2.Sort()
lastLine := ""
go func() {
defer watcher.Close()
err = watcher.Add(OUTFILE)
if err != nil {
log.Fatalf("Failed to watch file: %v", err)
}
for {
select {
case event, ok := <-watcher.Events:
if !ok {
log.Printf("Watcher failed: %v", err)
return
}
if event.Op&fsnotify.Write == fsnotify.Write {
l, err := io.ReadAll(f)
if err != nil {
log.Printf("Failed to read file: %v", err)
return
}
str := string(l)
if str[len(str)-2:] == "\n\n" {
fmt.Print(str[:len(str)-1])
} else {
fmt.Print(string(l))
}
f.Seek(0, 0)
}
}
}
}
}
func listenForCommands(players *players) {
listener, err := net.Listen("unix", SOCK)
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
@ -295,17 +277,101 @@ func main() {
case "list":
con.Write([]byte(players.mpris2.String()))
case "share":
out, err := os.Create(OUTFILE)
if !isSharing {
f, err := os.OpenFile(OUTFILE, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0666)
defer f.Close()
if err != nil {
con.Write([]byte(fmt.Sprintf("Failed: %s", err)))
fmt.Fprintf(con, "Failed: %v", err)
}
var out io.Writer = emptyEveryWrite{file: f}
WRITER = io.MultiWriter(os.Stdout, out)
con.Write([]byte("success"))
isSharing = true
}
fmt.Fprint(con, "success")
default:
fmt.Println("Invalid command")
}
}
}
type emptyEveryWrite struct {
file *os.File
}
func (w emptyEveryWrite) Write(p []byte) (n int, err error) {
offset, err := w.file.Seek(0, 0)
if err != nil {
return 0, err
}
return w.file.WriteAt(p, offset)
}
func main() {
logfile, err := os.OpenFile(LOGFILE, os.O_CREATE|os.O_APPEND|os.O_RDWR, 0666)
if err != nil {
log.Fatalf("Couldn't open %s for writing: %s", LOGFILE, err)
}
mw := io.MultiWriter(logfile, os.Stdout)
log.SetOutput(mw)
flag.StringVar(&PLAY, "play", PLAY, "Play symbol/text to use.")
flag.StringVar(&PAUSE, "pause", PAUSE, "Pause symbol/text to use.")
flag.StringVar(&SEP, "separator", SEP, "Separator string to use between artist, album, and title.")
flag.StringVar(&ORDER, "order", ORDER, "Element order.")
flag.BoolVar(&AUTOFOCUS, "autofocus", AUTOFOCUS, "Auto switch to currently playing music players.")
flag.BoolVar(&SHOW_POS, "position", SHOW_POS, "Show current position between brackets, e.g (04:50/05:00)")
flag.BoolVar(&INTERPOLATE, "interpolate", INTERPOLATE, "Interpolate track position (helpful for players that don't update regularly, e.g mpDris2)")
flag.BoolVar(&REPLACE, "replace", REPLACE, "replace existing waybar-mpris if found. When false, new instance will clone the original instances output.")
var command string
flag.StringVar(&command, "send", "", "send command to already runnning waybar-mpris instance. (options: "+strings.Join(COMMANDS, "/")+")")
flag.Parse()
os.Stderr = logfile
if command != "" {
execCommand(command)
}
// fmt.Println("New array", players)
// Start command listener
if _, err := os.Stat(SOCK); err == nil {
if REPLACE {
fmt.Printf("Socket %s already exists, this could mean waybar-mpris is already running.\nStarting this instance will overwrite the file, possibly stopping other instances from accepting commands.\n", SOCK)
var input string
ignoreChoice := false
fmt.Printf("Continue? [y/n]: ")
go func() {
fmt.Scanln(&input)
if strings.Contains(input, "y") && !ignoreChoice {
os.Remove(SOCK)
}
}()
time.Sleep(5 * time.Second)
if input == "" {
fmt.Printf("\nRemoving due to lack of input.\n")
ignoreChoice = true
// os.Remove(SOCK)
}
} else if conn, err := net.Dial("unix", SOCK); err == nil {
// When waybar-mpris is already running, we attach to its output instead of launching a whole new instance.
duplicateOutput(conn)
} else {
if err != nil {
os.Stdout.WriteString("Couldn't dial socket, deleting instead: " + err.Error())
}
os.Remove(SOCK)
os.Remove(OUTFILE)
}
}
conn, err := dbus.SessionBus()
if err != nil {
log.Fatalln("Error connecting to DBus:", err)
}
players := &players{
mpris2: mpris2.NewMpris2(conn, INTERPOLATE, POLL, AUTOFOCUS),
}
players.mpris2.Reload()
players.mpris2.Sort()
lastLine := ""
go listenForCommands(players)
go players.mpris2.Listen()
if SHOW_POS {
go func() {

BIN
waybar-mpris
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