init project and add config

cmd/recipes/main.go

@@ -0,0 +1,12 @@
+package main
+
+import (
+	"fmt"
+	"recipes/internal/config"
+)
+
+func main() {
+	// load config
+	cfg := config.MustLoad()
+	fmt.Printf("%+v", cfg)
+}

config/local.yaml

@@ -0,0 +1,22 @@
+env: "local" # local / dev / prod
+
+http-server:
+  address: "localhost:4444"
+  timeout: 4s
+  idle_timeout: 60s
+
+postgresql:
+  db_name: "user"
+  user: "user"
+  password: "password"
+  address: "127.0.0.1:5432"
+
+redis:
+  user: "user"
+  password: "password"
+  address: "127.0.0.1:6379"
+
+minio:
+  user: "user"
+  password: "password"
+  address: "127.0.0.1:9000"

go.mod

@@ -0,0 +1,11 @@
+module recipes
+
+go 1.21.5
+
+require (
+	github.com/BurntSushi/toml v1.2.1 // indirect
+	github.com/ilyakaznacheev/cleanenv v1.5.0 // indirect
+	github.com/joho/godotenv v1.5.1 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+	olympos.io/encoding/edn v0.0.0-20201019073823-d3554ca0b0a3 // indirect
+)

go.sum

@@ -0,0 +1,11 @@
+github.com/BurntSushi/toml v1.2.1 h1:9F2/+DoOYIOksmaJFPw1tGFy1eDnIJXg+UHjuD8lTak=
+github.com/BurntSushi/toml v1.2.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
+github.com/ilyakaznacheev/cleanenv v1.5.0 h1:0VNZXggJE2OYdXE87bfSSwGxeiGt9moSR2lOrsHHvr4=
+github.com/ilyakaznacheev/cleanenv v1.5.0/go.mod h1:a5aDzaJrLCQZsazHol1w8InnDcOX0OColm64SlIi6gk=
+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+olympos.io/encoding/edn v0.0.0-20201019073823-d3554ca0b0a3 h1:slmdOY3vp8a7KQbHkL+FLbvbkgMqmXojpFUO/jENuqQ=
+olympos.io/encoding/edn v0.0.0-20201019073823-d3554ca0b0a3/go.mod h1:oVgVk4OWVDi43qWBEyGhXgYxt7+ED4iYNpTngSLX2Iw=

internal/config/config.go

@@ -0,0 +1,66 @@
+package config
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/ilyakaznacheev/cleanenv"
+)
+
+type Config struct {
+	Env        string `yaml:"env" env-required:"true"`
+	HTTPServer struct {
+		Address     string        `yaml:"address"`
+		Timeout     time.Duration `yaml:"timeout"`
+		IdleTimeout time.Duration `yaml:"idle_timeout"`
+	} `yaml:"http-server"`
+	Postgresql struct {
+		DBName   string `yaml:"db_name"`
+		User     string `yaml:"user"`
+		Password string `yaml:"password"`
+		Address  string `yaml:"address"`
+	} `yaml:"postgresql"`
+	Redis struct {
+		User     string `yaml:"user"`
+		Password string `yaml:"password"`
+		Address  string `yaml:"address"`
+	} `yaml:"redis"`
+	Minio struct {
+		User     string `yaml:"user"`
+		Password string `yaml:"password"`
+		Address  string `yaml:"address"`
+	} `yaml:"minio"`
+}
+
+func MustLoad() *Config {
+	configPath := fetchConfigPath()
+	if configPath == "" {
+		panic("CONFIG_PATH is not set")
+	}
+	// check if file exists
+	if _, err := os.Stat(configPath); os.IsNotExist(err) {
+		panic(fmt.Sprintf("config file does not exist: %s", configPath))
+	}
+
+	var cfg Config
+	// read config
+	if err := cleanenv.ReadConfig(configPath, &cfg); err != nil {
+		panic(fmt.Errorf("cannot read config: %w", err))
+	}
+
+	return &cfg
+}
+
+// fetchConfigPath returns config path from env or flag.
+func fetchConfigPath() string {
+	var res string = os.Getenv("CONFIG_PATH")
+
+	if res == "" {
+		flag.StringVar(&res, "config", "", "path to config file")
+		flag.Parse()
+	}
+
+	return res
+}