refactor(internal/peer): use flags instead of env vars

internal/peer/peer.go

@@ -5,6 +5,7 @@ import (
 	"crypto/ed25519"
 	"encoding/base64"
 	"errors"
+	"flag"
 	"fmt"
 	"io"
 	"log/slog"
@@ -71,35 +72,6 @@ func (c Conf) SlogLevel() slog.Level {
 	}
 }
 
-func loadConfigFromSystem(sys system.System) Conf {
-	var c Conf
-
-	c.Host = sys.GetEnv(EnvHost)
-	if len(c.Host) == 0 {
-		c.Host = DefaultHost
-	}
-
-	c.Port = sys.GetEnv(EnvPort)
-	if len(c.Port) == 0 {
-		c.Port = DefaultPort
-	}
-
-	c.ConfigDir = sys.GetEnv(EnvConfigDir)
-	if len(c.ConfigDir) == 0 {
-		c.ConfigDir = DefaultConfigDir
-	}
-
-	c.DataDir = sys.GetEnv(EnvDataDir)
-	if len(c.DataDir) == 0 {
-		c.DataDir = DefaultDataDir
-	}
-
-	// defaults are handled by Conf.SlogLevel.
-	c.LogLevel = sys.GetEnv("DSFX_LOG_LEVEL")
-
-	return c
-}
-
 // Peer ...
 type Peer struct {
 	disk    disk.Disk
@@ -111,7 +83,22 @@ type Peer struct {
 
 // New ...
 func New(disk disk.Disk, system system.System) *Peer {
-	conf := loadConfigFromSystem(system)
+	flagConfig := flag.String("configDir", "/etc/dsfx/config", "Path to the configuration directory")
+	flagData := flag.String("dataDir", "/etc/dsfx/data", "Path to the data directory")
+	flagLogLevel := flag.String("logLevel", "info", "The log level (debug, info, warn, error)")
+	flagHost := flag.String("host", "0.0.0.0", "The host to bind to")
+	flagPort := flag.String("port", "8000", "The port to bind to")
+
+	if !flag.Parsed() {
+		flag.Parse()
+	}
+	conf := Conf{
+		LogLevel:  *flagLogLevel,
+		ConfigDir: *flagConfig,
+		DataDir:   *flagData,
+		Host:      *flagHost,
+		Port:      *flagPort,
+	}
 
 	config := scoped.New(disk, conf.ConfigDir)
 	storage := scoped.New(disk, conf.DataDir)