From 32eed5ab312f6e60a487be519e9a57d733151c01 Mon Sep 17 00:00:00 2001
From: Simon Ser <contact@emersion.fr>
Date: Mon, 19 Feb 2024 01:50:58 +0100
Subject: [PATCH] Add basic config file

Closes: https://todo.sr.ht/~emersion/sinwon/2

---
 config.go | 24 ++++++++++++++++++++++++
 go.mod    |  2 ++
 go.sum    |  4 ++++
 main.go   | 16 +++++++++++++---

diff --git a/config.go b/config.go
new file mode 100644
index 0000000000000000000000000000000000000000..2d3067b1a4e1146c315dc5f4cb4932ac9ff160a3
--- /dev/null
+++ b/config.go
@@ -0,0 +1,24 @@
+package main
+
+import (
+	"os"
+
+	"git.sr.ht/~emersion/go-scfg"
+)
+
+type Config struct {
+	Listen   string `scfg:"listen"`
+	Database string `scfg:"database"`
+}
+
+func loadConfig(filename string) (*Config, error) {
+	f, err := os.Open(filename)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	var config Config
+	err = scfg.NewDecoder(f).Decode(&config)
+	return &config, err
+}
diff --git a/go.mod b/go.mod
index a08e4be9d9c3a1ee3188f72994751c0eae2271ec..2c40e24fbfac5b403e711f8c2fc6743e69dfbb5b 100644
--- a/go.mod
+++ b/go.mod
@@ -9,3 +9,5 @@
 require golang.org/x/crypto v0.19.0
 
 require github.com/go-chi/chi/v5 v5.0.12
+
+require git.sr.ht/~emersion/go-scfg v0.0.0-20240128091534-2ae16e782082
diff --git a/go.sum b/go.sum
index 861090a14f9dc7f7147d39b5e4ffdd55057f35aa..6a51921d942f10cf6252365e15e07b6c05f3057d 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,9 @@
 git.sr.ht/~emersion/go-oauth2 v0.0.0-20240217160856-2e0d6e20b088 h1:KuPliLD8CQM1WbCHdjHR6mhadIzLaAJCNENmvB1y9gs=
 git.sr.ht/~emersion/go-oauth2 v0.0.0-20240217160856-2e0d6e20b088/go.mod h1:VHj0jSCLIkrfEwmOvJ4+ykpoVbD/YLN7BM523oKKBHc=
+git.sr.ht/~emersion/go-scfg v0.0.0-20240128091534-2ae16e782082 h1:9Udx5fm4vRtmgDIBjy2ef5QioHbzpw5oHabbhpAUyEw=
+git.sr.ht/~emersion/go-scfg v0.0.0-20240128091534-2ae16e782082/go.mod h1:ybgvEJTIx5XbaspSviB3KNa6OdPmAZqDoSud7z8fFlw=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/go-chi/chi/v5 v5.0.12 h1:9euLV5sTrTNTRUU9POmDUvfxyj6LAABLUcEWO+JJb4s=
 github.com/go-chi/chi/v5 v5.0.12/go.mod h1:DslCQbL2OYiznFReuXYUmQ2hGd1aDpCnlMNITLSKoi8=
 github.com/mattn/go-sqlite3 v1.14.22 h1:2gZY6PC6kBnID23Tichd1K+Z0oS6nE/XwU+Vz/5o4kU=
diff --git a/main.go b/main.go
index 317bfdd68d1f44f9b0dc67df19f32a82d5b8d6ca..e457185413695d6800f080bd36fdb5e707bd2186 100644
--- a/main.go
+++ b/main.go
@@ -20,16 +20,26 @@ 	staticFS embed.FS
 )
 
 func main() {
-	var listenAddr string
+	var configFilename, listenAddr string
+	flag.StringVar(&configFilename, "config", "/etc/sinwon/config", "Configuration filename")
 	flag.StringVar(&listenAddr, "listen", ":8080", "HTTP listen address")
 	flag.Parse()
 
-	tpl := template.Must(template.ParseFS(templateFS, "template/*.html"))
+	cfg, err := loadConfig(configFilename)
+	if err != nil {
+		log.Fatalf("Failed to load config file: %v", err)
+	}
 
-	db, err := openDB("sinwon.db")
+	if listenAddr == "" {
+		listenAddr = cfg.Listen
+	}
+
+	db, err := openDB(cfg.Database)
 	if err != nil {
 		log.Fatalf("Failed to open DB: %v", err)
 	}
+
+	tpl := template.Must(template.ParseFS(templateFS, "template/*.html"))
 
 	mux := chi.NewRouter()
 	mux.Handle("/static/*", http.FileServer(http.FS(staticFS)))

-- 
2.48.1