configuration file handling (xml format)

ServerOptions.go

@@ -36,7 +36,7 @@ func DefaultOptions() *ServerOptions {
 		RecentChangesRSS:     10,
 		GzipCompressionLevel: 9,
 		BannedUserIPRegexes:  make([]string, 0),
-		ExternalBaseURL:      "/",
+		ExternalBaseURL:      "http://127.0.0.1/",
 		DeclareRSSLanguage:   "en-GB",
 		DeclareRSSEmail:      `nobody@example.com`,
 	}

cmd/yatwiki-server/main.go

@@ -1,11 +1,12 @@
 package main
 
 import (
+	"encoding/xml"
 	"flag"
 	"fmt"
+	"io/ioutil"
 	"net/http"
 	"os"
-	"time"
 
 	"code.ivysaur.me/yatwiki3"
 )
@@ -13,17 +14,36 @@ import (
 func main() {
 
 	bindAddr := flag.String("listen", "127.0.0.1:80", "Bind address")
-	dbPath := flag.String("database", "wiki.db", "Database file")
-	faviconPath := flag.String("favicon", "", "Local disk path to favicon.ico file (leave blank for no favicon)")
+	configPath := flag.String("config", "config.xml", "Configuration file")
 	flag.Parse()
 
-	opts := yatwiki3.DefaultOptions()
-	opts.DBFilePath = *dbPath
-	opts.FaviconFilePath = *faviconPath
-	opts.Timezone = time.Local.String()
-	opts.ExternalBaseURL = "http://" + *bindAddr + "/"
+	opts := yatwiki3.ServerOptions{}
 
-	ws, err := yatwiki3.NewWikiServer(opts)
+	cfg, err := ioutil.ReadFile(*configPath)
+
+	if err != nil {
+		if os.IsNotExist(err) {
+			opts = *yatwiki3.DefaultOptions()
+			if cfg, err := xml.MarshalIndent(opts, "", "\t"); err == nil {
+				err := ioutil.WriteFile(*configPath, cfg, 0644)
+				if err != nil {
+					fmt.Fprintf(os.Stderr, "Failed to save default configuration file: %s", err.Error())
+				}
+			}
+		} else {
+			fmt.Fprintf(os.Stderr, "Failed to load configuration file '%s': %s\n", *configPath, err.Error())
+			os.Exit(1)
+		}
+	} else {
+		fmt.Printf("Loading configuration from '%s'...\n", *configPath)
+		err = xml.Unmarshal(cfg, &opts)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Failed to parse configuration file: %s\n", err.Error())
+			os.Exit(1)
+		}
+	}
+
+	ws, err := yatwiki3.NewWikiServer(&opts)
 	if err != nil {
 		fmt.Fprintln(os.Stderr, err.Error())
 		os.Exit(1)