Merge pull request #2 from Nucrea/implement-args-parser

Implement args parser

args_parser/args.go

@@ -0,0 +1,32 @@
+package args_parser
+
+import (
+	"github.com/akamensky/argparse"
+)
+
+type Args interface {
+	GetConfigPath() string
+}
+
+func Parse(osArgs []string) (Args, error) {
+	parser := argparse.NewParser("backend", "runs backend")
+
+	s := parser.String("c", "config", &argparse.Options{Required: true, Help: "Path to a config file"})
+
+	err := parser.Parse(osArgs)
+	if err != nil {
+		return nil, err
+	}
+
+	return &args{
+		ConfigPath: *s,
+	}, nil
+}
+
+type args struct {
+	ConfigPath string
+}
+
+func (a *args) GetConfigPath() string {
+	return a.ConfigPath
+}

go.mod

@@ -3,6 +3,7 @@ module backend
 go 1.22.5
 
 require (
+	github.com/akamensky/argparse v1.4.0
 	github.com/gin-gonic/gin v1.10.0
 	github.com/go-playground/validator/v10 v10.22.0
 	github.com/golang-jwt/jwt/v5 v5.2.1

go.sum

@@ -1,3 +1,5 @@
+github.com/akamensky/argparse v1.4.0 h1:YGzvsTqCvbEZhL8zZu2AiA5nq805NZh75JNj4ajn1xc=
+github.com/akamensky/argparse v1.4.0/go.mod h1:S5kwC7IuDcEr5VeXtGPRVZ5o/FdhcMlQz4IZQuw64xA=
 github.com/bytedance/sonic v1.11.9 h1:LFHENlIY/SLzDWverzdOvgMztTxcfcF+cqNsz9pK5zg=
 github.com/bytedance/sonic v1.11.9/go.mod h1:LysEHSvpvDySVdC2f87zGWf6CIKJcAvqab1ZaiQtds4=
 github.com/bytedance/sonic/loader v0.1.1 h1:c+e5Pt1k/cy5wMveRDyk2X4B9hF4g7an8N3zCYjJFNM=

main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"backend/args_parser"
 	"backend/config"
 	"backend/src/handlers"
 	"backend/src/middleware"
@@ -8,7 +9,9 @@ import (
 	"backend/src/repo"
 	"backend/src/services"
 	"backend/src/utils"
+	"crypto/rsa"
 	"crypto/x509"
+	"database/sql"
 	"encoding/pem"
 	"fmt"
 	"os"
@@ -19,31 +22,42 @@ import (
 )
 
 func main() {
-	conf, err := config.NewFromFile("./config_example/config.yaml")
+	args, err := args_parser.Parse(os.Args)
 	if err != nil {
 		panic(err)
 	}
 
-	keyRawBytes, err := os.ReadFile(conf.GetJwtSigningKey())
+	conf, err := config.NewFromFile(args.GetConfigPath())
 	if err != nil {
 		panic(err)
 	}
 
-	keyPem, _ := pem.Decode(keyRawBytes)
-	key, err := x509.ParsePKCS1PrivateKey(keyPem.Bytes)
-	if err != nil {
-		panic(err)
+	var key *rsa.PrivateKey
+	{
+		keyRawBytes, err := os.ReadFile(conf.GetJwtSigningKey())
+		if err != nil {
+			panic(err)
+		}
+
+		keyPem, _ := pem.Decode(keyRawBytes)
+		key, err = x509.ParsePKCS1PrivateKey(keyPem.Bytes)
+		if err != nil {
+			panic(err)
+		}
 	}
 
-	pgConnStr := conf.GetPostgresUrl()
-	connConf, err := pgx.ParseConnectionString(pgConnStr)
-	if err != nil {
-		panic(err)
-	}
+	var sqlDb *sql.DB
+	{
+		pgConnStr := conf.GetPostgresUrl()
+		connConf, err := pgx.ParseConnectionString(pgConnStr)
+		if err != nil {
+			panic(err)
+		}
 
-	sqlDb := stdlib.OpenDB(connConf)
-	if err := sqlDb.Ping(); err != nil {
-		panic(err)
+		sqlDb := stdlib.OpenDB(connConf)
+		if err := sqlDb.Ping(); err != nil {
+			panic(err)
+		}
 	}
 
 	jwtUtil := utils.NewJwtUtil(key)