From 6a67af79b71cd370a98eb427f9da76e5ce19e546 Mon Sep 17 00:00:00 2001
From: Sergey Chubaryan <serghio2@yandex.ru>
Date: Sat, 27 Jul 2024 18:07:36 +0300
Subject: [PATCH 1/3] added primitive args parsing

---
 args/args.go | 32 ++++++++++++++++++++++++++++++++
 go.mod       |  1 +
 go.sum       |  2 ++
 3 files changed, 35 insertions(+)
 create mode 100644 args/args.go

diff --git a/args/args.go b/args/args.go
new file mode 100644
index 0000000..667236a
--- /dev/null
+++ b/args/args.go
@@ -0,0 +1,32 @@
+package args
+
+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("s", "string", &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
+}
diff --git a/go.mod b/go.mod
index 71d1934..bce77c0 100644
--- a/go.mod
+++ b/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
diff --git a/go.sum b/go.sum
index 7b5667d..43e9afb 100644
--- a/go.sum
+++ b/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=

From 83315c027a6e3c2a908b8a71ad331815f86f883a Mon Sep 17 00:00:00 2001
From: Sergey Chubaryan <serghio2@yandex.ru>
Date: Sat, 27 Jul 2024 19:04:51 +0300
Subject: [PATCH 2/3] getting config path from cmd args

---
 {args => args_parser}/args.go | 4 ++--
 main.go                       | 8 +++++++-
 2 files changed, 9 insertions(+), 3 deletions(-)
 rename {args => args_parser}/args.go (84%)

diff --git a/args/args.go b/args_parser/args.go
similarity index 84%
rename from args/args.go
rename to args_parser/args.go
index 667236a..9763bab 100644
--- a/args/args.go
+++ b/args_parser/args.go
@@ -1,4 +1,4 @@
-package args
+package args_parser
 
 import (
 	"github.com/akamensky/argparse"
@@ -11,7 +11,7 @@ type Args interface {
 func Parse(osArgs []string) (Args, error) {
 	parser := argparse.NewParser("backend", "runs backend")
 
-	s := parser.String("s", "string", &argparse.Options{Required: true, Help: "Path to a config file"})
+	s := parser.String("c", "config", &argparse.Options{Required: true, Help: "Path to a config file"})
 
 	err := parser.Parse(osArgs)
 	if err != nil {
diff --git a/main.go b/main.go
index 5c5282e..302a2d2 100644
--- a/main.go
+++ b/main.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"backend/args_parser"
 	"backend/config"
 	"backend/src/handlers"
 	"backend/src/middleware"
@@ -19,7 +20,12 @@ import (
 )
 
 func main() {
-	conf, err := config.NewFromFile("./config_example/config.yaml")
+	args, err := args_parser.Parse(os.Args)
+	if err != nil {
+		panic(err)
+	}
+
+	conf, err := config.NewFromFile(args.GetConfigPath())
 	if err != nil {
 		panic(err)
 	}

From 00621524e9029397c8a80426a885a158b72d05c0 Mon Sep 17 00:00:00 2001
From: Sergey Chubaryan <serghio2@yandex.ru>
Date: Sat, 27 Jul 2024 19:21:30 +0300
Subject: [PATCH 3/3] small main code improve

---
 main.go | 42 +++++++++++++++++++++++++-----------------
 1 file changed, 25 insertions(+), 17 deletions(-)

diff --git a/main.go b/main.go
index 302a2d2..f87ff5f 100644
--- a/main.go
+++ b/main.go
@@ -9,7 +9,9 @@ import (
 	"backend/src/repo"
 	"backend/src/services"
 	"backend/src/utils"
+	"crypto/rsa"
 	"crypto/x509"
+	"database/sql"
 	"encoding/pem"
 	"fmt"
 	"os"
@@ -30,26 +32,32 @@ func main() {
 		panic(err)
 	}
 
-	keyRawBytes, err := os.ReadFile(conf.GetJwtSigningKey())
-	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)
+		}
 	}
 
-	keyPem, _ := pem.Decode(keyRawBytes)
-	key, err := x509.ParsePKCS1PrivateKey(keyPem.Bytes)
-	if err != nil {
-		panic(err)
-	}
+	var sqlDb *sql.DB
+	{
+		pgConnStr := conf.GetPostgresUrl()
+		connConf, err := pgx.ParseConnectionString(pgConnStr)
+		if err != nil {
+			panic(err)
+		}
 
-	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)