Forgotten files.

configuration/config.go

@@ -0,0 +1,18 @@
+package configuration
+
+// Represents configuration file structure.
+type config struct {
+	// Network represents network stack configuration.
+	Network []Network `yaml:"network"`
+}
+
+type Network struct {
+	// Address represents address to bing in form of "ip:port".
+	Address string `yaml:"address"`
+	// Limit sets maximum simultaneous connections that can be
+	// processed by worker.
+	Limit int `yaml:"limit"`
+	// Type sets connection type. See networker for available
+	// types.
+	Type string `yaml:"type"`
+}

configuration/exported.go

@@ -0,0 +1,55 @@
+package configuration
+
+import (
+	// stdlib
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+
+	// other
+	"gopkg.in/yaml.v2"
+)
+
+var (
+	Cfg *config
+)
+
+// Initialize initializes package and parses configuration into struct.
+func Initialize() {
+	log.Println("Initializing configuration...")
+
+	pathRaw, found := os.LookupEnv("GONEWS_CONFIG")
+	if !found {
+		log.Fatalln("Failed to read configuration - no GONEWS_CONFIG environment variable defined.")
+	}
+
+	// Normalize path.
+	if strings.HasPrefix(pathRaw, "~") {
+		userHomeDir, err := os.UserHomeDir()
+		if err != nil {
+			log.Fatalln("Failed to obtain user's home directory path: " + err.Error())
+		}
+
+		pathRaw = strings.Replace(pathRaw, "~", userHomeDir, 1)
+	}
+	absPath, err1 := filepath.Abs(pathRaw)
+	if err1 != nil {
+		log.Fatalln("Failed to get absolute path for configuration file: " + err1.Error())
+	}
+
+	// Read and parse configuration file.
+	fileData, err2 := ioutil.ReadFile(absPath)
+	if err2 != nil {
+		log.Fatalln("Failed to read configuration file data: " + err2.Error())
+	}
+
+	Cfg = &config{}
+	err3 := yaml.Unmarshal(fileData, Cfg)
+	if err3 != nil {
+		log.Fatalln("Failed to parse configuration file: " + err3.Error())
+	}
+
+	log.Printf("Configuration file parsed: %+v\n", Cfg)
+}