Initial commit

internal/configuration/config.go

@@ -0,0 +1,46 @@
+package configuration
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/goccy/go-yaml"
+	"github.com/sirupsen/logrus"
+)
+
+type Config struct {
+	Deconnect Deconnect `yaml:"deconnect"`
+	Upstream  Upstream  `yaml:"upstream"`
+}
+
+type Deconnect struct {
+	LogLevel logrus.Level `yaml:"log_level"`
+	Host     string       `yaml:"host"`
+	Port     string       `yaml:"port"`
+}
+
+type Upstream struct {
+	URL         string `yaml:"url"`
+	InsecureTLS bool   `yaml:"insecure_tls,omitempty"`
+}
+
+func New() (*Config, error) {
+	deconnectCfgPath := "/etc/deconnect.yaml"
+	if customPath, ok := os.LookupEnv("DECONNECT_CONFIG"); ok {
+		deconnectCfgPath = customPath
+	}
+
+	rawConfig, err := os.ReadFile(deconnectCfgPath)
+	if err != nil {
+		return nil, fmt.Errorf("%w: %w (%w)", ErrConfiguration, ErrCantReadConfigFile, err)
+	}
+
+	config := new(Config)
+
+	err = yaml.Unmarshal(rawConfig, config)
+	if err != nil {
+		return nil, fmt.Errorf("%w: %w (%w)", ErrConfiguration, ErrCantParseConfigFile, err)
+	}
+
+	return config, nil
+}

internal/configuration/errors.go

@@ -0,0 +1,10 @@
+package configuration
+
+import "errors"
+
+var (
+	ErrConfiguration               = errors.New("configuration")
+	ErrCantReadConfigFile          = errors.New("can't read config file")
+	ErrCantParseConfigFile         = errors.New("can't parse config file")
+	ErrSourceDirectoryDoesNotExist = errors.New("source directory does not exist")
+)