Replace unix socket logic with go.balki.me/anyhttp

Now also support systemd socket activation

.gitignore

@@ -0,0 +1 @@
+tglistbot*

Makefile

@@ -0,0 +1,12 @@
+
+VERSION = $(shell git describe --tags --abbrev=0)
+
+build_release:
+	CGO_ENABLED=0 go build -buildmode=pie -ldflags "-X main.Version=$(VERSION)" -o tglistbot-$(VERSION)
+
+release_check:
+	go list -m go.balki.me/tglistbot@$(VERSION)
+
+clean:
+	rm -i tglistbot* || true
+

go.mod

@@ -1,3 +1,5 @@
 module go.balki.me/tglistbot
 
 go 1.20
+
+require go.balki.me/anyhttp v0.1.0

go.sum

@@ -0,0 +1,2 @@
+go.balki.me/anyhttp v0.1.0 h1:ULzLWS1pRWMEduHHJxXCbvxoTmxNaWSNANV9gQ0Pigw=
+go.balki.me/anyhttp v0.1.0/go.mod h1:JhfekOIjgVODoVqUCficjpIgmB3wwlB7jhN0eN2EZ/s=

main.go

@@ -4,47 +4,47 @@ package main
 import (
 	"bytes"
 	"encoding/json"
-	"errors"
 	"fmt"
 	"io"
-	"io/fs"
 	"log"
-	"net"
 	"net/http"
 	"os"
 	"path"
 	"runtime/debug"
-	"strconv"
 	"strings"
 	"sync"
 	"time"
 
+	"go.balki.me/anyhttp"
 	"go.balki.me/tglistbot/glist"
 )
 
+// Version will be set from build commandline
+var Version string
 var apiToken string
 
+var usage string = `Telegram List bot
+Environment variables:
+TGLB_API_TOKEN (required): See https://core.telegram.org/bots#how-do-i-create-a-bot
+TGLB_PORT (default 28923): Set numerical port or unix//run/path.sock for unix socket
+TGLB_DATA_PATH (default .): Directory path where list data is stored
+`
+
 func main() {
 
 	apiToken = os.Getenv("TGLB_API_TOKEN")
 
 	if apiToken == "" {
-		log.Panicln("TG_API_TOKEN is empty")
+		log.Print(usage)
+		log.Panicln("TGLB_API_TOKEN is empty")
 	}
 
-	port, unixSocketPath := func() (int, string) {
-		portStr := os.Getenv("TGLB_PORT")
-
-		defaultPort := 28923
-
-		if strings.HasPrefix(portStr, "unix/") {
-			return defaultPort, strings.TrimPrefix(portStr, "unix/")
+	addr := func() string {
+		addr := os.Getenv("TGLB_PORT")
+		if addr == "" {
+			return "28923"
 		}
-
-		if port, err := strconv.Atoi(portStr); err == nil {
-			return port, ""
-		}
-		return defaultPort, ""
+		return addr
 	}()
 
 	dataPath := func() string {
@@ -61,7 +61,10 @@ func main() {
 
 	glist.DataPath = dataPath
 
-	commit := func() string {
+	version := func() string {
+		if Version != "" {
+			return Version
+		}
 		if bi, ok := debug.ReadBuildInfo(); ok {
 			for _, s := range bi.Settings {
 				if s.Key == "vcs.revision" {
@@ -72,14 +75,7 @@ func main() {
 		return "unknown"
 	}()
 
-	listeningOn := func() string {
-		if unixSocketPath != "" {
-			return fmt.Sprintf("socket: %q", unixSocketPath)
-		}
-		return fmt.Sprintf("port: %v", port)
-	}()
-
-	log.Printf("List bot (%s) starting with datapath: %q, %s\n", commit, dataPath, listeningOn)
+	log.Printf("List bot (%s) starting with datapath: %q, %s\n", version, dataPath, addr)
 
 	var chats sync.Map
 	if err := loadData(dataPath, &chats); err != nil {
@@ -147,24 +143,7 @@ func main() {
 
 		}
 	})
-	if unixSocketPath != "" {
-		// Remove old one
-		if err := os.Remove(unixSocketPath); err != nil && !errors.Is(err, fs.ErrNotExist) {
-			log.Panicf("Failed to remove unix socket : %q err: %v\n", unixSocketPath, err)
-		}
-
-		l, err := net.Listen("unix", unixSocketPath)
-		if err != nil {
-			log.Panicf("Unable to listen to unix socket : %q err: %v\n", unixSocketPath, err)
-		}
-
-		if err = os.Chmod(unixSocketPath, 0666); err != nil {
-			log.Panicf("Failed to set permission of unix socket %q err: %v\n", unixSocketPath, err)
-		}
-
-		log.Panicln(http.Serve(l, nil))
-	}
-	log.Panicln(http.ListenAndServe(fmt.Sprintf(":%v", port), nil))
+	log.Panicln(anyhttp.ListenAndServe(addr, nil))
 }
 
 func handleTextAdded(gl *glist.GList, text string) {