80 lines
1.6 KiB
Go
80 lines
1.6 KiB
Go
package main
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import (
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"github.com/BurntSushi/toml"
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"gopkg.in/fsnotify.v1"
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"os"
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"path/filepath"
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"strings"
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)
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type FileProvider struct {
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Watch bool
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Filename string
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}
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func NewFileProvider() *FileProvider {
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fileProvider := new(FileProvider)
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// default values
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fileProvider.Watch = true
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return fileProvider
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}
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func (provider *FileProvider) Provide(configurationChan chan<- *Configuration) {
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watcher, err := fsnotify.NewWatcher()
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if err != nil {
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log.Error("Error creating file watcher", err)
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return
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}
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defer watcher.Close()
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file, err := os.Open(provider.Filename)
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if err != nil {
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log.Error("Error opening file", err)
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return
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}
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defer file.Close()
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done := make(chan bool)
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// Process events
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go func() {
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for {
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select {
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case event := <-watcher.Events:
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if strings.Contains(event.Name, file.Name()) {
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log.Debug("File event:", event)
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configuration := provider.LoadFileConfig(file.Name())
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if configuration != nil {
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configurationChan <- configuration
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}
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}
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case error := <-watcher.Errors:
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log.Error("Watcher event error", error)
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}
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}
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}()
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if provider.Watch {
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err = watcher.Add(filepath.Dir(file.Name()))
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}
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if err != nil {
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log.Error("Error adding file watcher", err)
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return
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}
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configuration := provider.LoadFileConfig(file.Name())
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configurationChan <- configuration
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<-done
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}
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func (provider *FileProvider) LoadFileConfig(filename string) *Configuration {
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configuration := new(Configuration)
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if _, err := toml.DecodeFile(filename, configuration); err != nil {
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log.Error("Error reading file:", err)
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return nil
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}
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return configuration
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}
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