Initial commit

Proof-of-concept implementation. Bugs will occur.

internal/configuration/config.go

@@ -0,0 +1,49 @@
+package configuration
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/goccy/go-yaml"
+	"github.com/sirupsen/logrus"
+)
+
+type Config struct {
+	Paths       Paths       `yaml:"paths"`
+	FakeTunes   FakeTunes   `yaml:"faketunes"`
+	Transcoding Transcoding `yaml:"transcoding"`
+}
+
+type FakeTunes struct {
+	CacheSize int64        `yaml:"cache_size"`
+	LogLevel  logrus.Level `yaml:"log_level"`
+}
+
+type Paths struct {
+	Source      string `yaml:"source"`
+	Destination string `yaml:"destination"`
+}
+
+type Transcoding struct {
+	Parallel int64 `yaml:"parallel"`
+}
+
+func New() (*Config, error) {
+	fakeTunesCfgPath := "/etc/faketunes.yaml"
+	if customPath, ok := os.LookupEnv("FAKETUNES_CONFIG"); ok {
+		fakeTunesCfgPath = customPath
+	}
+
+	rawConfig, err := os.ReadFile(fakeTunesCfgPath)
+	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")
+)