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